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1992013 CALIFORNIA PLUMBING CODE

CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLECHAPTER 12 - FUEL GAS PIPING

(Matrix Adoption Tables are non-regulatory, intended only as an aid to the user. See Chapter 1 for state agency authority and building application.)

Adopting Agency BSC SFMHCD DSA OSHPD

BSCC DPH AGR DWR CA SL SLC1 2 1-AC AC SS SS/CC 1 2 3 4

Adopt Entire Chapter X X X X X X X X X X

Adopt Entire Chapter as amended(amended sections listed below)

Adopt only those sections that arelisted below

Chapter/Section

1210.18

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200 2013 CALIFORNIA PLUMBING CODE

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1201.0 Scope of Gas Piping.1201.1 Coverage of Piping System. Coverage of piping sys-tems shall extend from the point of delivery to the applianceconnections. For other than undiluted liquefied petroleum gassystems, the point of delivery shall be the outlet of the serv-ice meter assembly or the outlet of the service regulator orservice shutoff valve where no meter is provided. For undi-luted liquefied petroleum gas systems, the point of deliveryshall be considered the outlet of the final pressure regulator,exclusive of the line gas regulators where no meter is in-stalled. Where a meter is installed, the point of delivery shallbe the outlet of the meter. [NFPA 54-12:1.1.1.1(A)]1201.2 Piping System Requirements. Piping systems re-quirements shall include design, materials, components, fab-rications, assembly, installation, testing, inspection, operation,and maintenance. [NFPA 54:1.1.1.1(C)]1201.3 Application. This code shall not apply to the follow-ing (reference standards for some of which appear in Chap-ter 14):(1) Portable LP-Gas appliances that are not connected to a

fixed fuel piping system.(2) Installation of appliances such as brooders, dehydrators,

dryers, and irrigation equipment used for agriculturalpurposes.

(3) Raw material (feedstock) applications, except for pipingto special atmosphere generators.

(4) Oxygen-fuel gas cutting and welding systems.(5) Industrial gas applications using gases such as acetylene

and acetylenic compounds, hydrogen, ammonia, carbonmonoxide, oxygen, and nitrogen.

(6) Petroleum refineries, pipeline compressor or pumpingstations, loading terminals, compounding plants, refin-ery tank farms, and natural gas processing plants.

(7) Large integrated chemical plants or portions of suchplants where flammable or combustible liquids or gasesare produced by chemical reactions or used in chemicalreactions.

(8) LP-Gas installations at utility gas plants.(9) Liquefied natural gas (LNG) installations.(10) Fuel gas piping in electric utility power plants.(11) Proprietary items of equipment, apparatus, or instru-

ments such as gas-generating sets, compressors, andcalorimeters.

(12) LP-Gas appliances for vaporization, gas mixing, and gasmanufacturing.

(13) LP-Gas piping for buildings under construction or reno-vations that are not to become part of the permanentbuilding piping system—that is, temporary fixed pipingfor building heat.

(14) Installation of LP-Gas systems for railroad switch heating.

(15) Installation of LP-Gas and compressed natural gas sys-tems on vehicles.

(16) Gas piping, meters, gas-pressure regulators, and otherappurtenances used by the serving gas supplier in distri-bution of gas, other than undiluted LP-Gas. [NFPA 54-12:1.1.1.2]

1202.0 General.1202.1 Installation. The regulations of this chapter shall gov-ern the installation of fuel gas piping in or in connection witha building, structure or within the property lines of premisesup to 5 pounds-force per square inch (34 kPa), other thanservice pipe. Fuel oil piping systems shall be installed in ac-cordance with NFPA 31.

1203.0 Inspection.1203.1 Inspection Notification. Upon completion of the in-stallation, alteration, or repair of gas piping, and prior to theuse thereof, the Authority Having Jurisdiction shall be noti-fied that such gas piping is ready for inspection.1203.2 Excavation. Excavations required for the installationof underground piping shall be kept open until such time asthe piping has been inspected and approved. Where such pip-ing is covered or concealed before such approval, it shall beexposed upon the direction of the Authority Having Jurisdic-tion.1203.3 Type of Inspections. The Authority Having Jurisdic-tion shall make the following inspections and either shall ap-prove that portion of the work as completed or shall notifythe permit holder wherein the same fails to be in accordancewith this code.

1203.3.1 Rough Piping Inspection. This inspectionshall be made after gas piping authorized by the permithas been installed and before such piping has been cov-ered or concealed or fixture or appliance has been at-tached thereto. This inspection shall include adetermination that the gas piping size, material, and in-stallation meet the requirements of this code.1203.3.2 Final Piping Inspection. This inspection shallbe made after piping authorized by the permit has beeninstalled and after portions thereof that are to be coveredor concealed are so concealed and before fixture, appli-ance, or shutoff valve has been attached thereto. This in-spection shall comply with Section 1213.1. Test gaugesused in conducting tests shall be in accordance with Sec-tion 318.0.

1203.4 Inspection Waived. In cases where the work author-ized by the permit consists of a minor installation of addi-tional piping to piping already connected to a gas meter, theforegoing inspections shall be permitted to be waived at thediscretion of the Authority Having Jurisdiction. In this event,the Authority Having Jurisdiction shall make such inspection

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as deemed advisable in order to be assured that the work hasbeen performed in accordance with the intent of this code.

1204.0 Certificate of Inspection.1204.1 Issuance. Where upon final piping inspection, the in-stallation is found to be in accordance with the provisions ofthis code, a certificate of inspection shall be permitted to beissued by the Authority Having Jurisdiction.1204.2 Gas Supplier. A copy of the certificate of such finalpiping inspection shall be issued to the serving gas suppliersupplying gas to the premises.1204.3 Unlawful. It shall be unlawful for a serving gas sup-plier, or person furnishing gas, to turn on or cause to be turnedon, a fuel gas or a gas meter or meters, until such certificateof final inspection, as herein provided, has been issued.

1205.0 Authority to Render Gas Service.1205.1 Authorized Personnel. It shall be unlawful for a per-son, firm, or corporation, excepting an authorized agent oremployee of a person, firm, or corporation engaged in thebusiness of furnishing or supplying gas and whose servicepipes supply or connect with the particular premises, to turnon or reconnect gas service in or on a premises where andwhen gas service is, at the time, not being rendered.1205.2 Outlets. It shall be unlawful to turn on or connectgas in or on the premises unless outlets are securely con-nected to gas appliances or capped or plugged with screwjoint fittings.

1206.0 Authority to Disconnect.1206.1 Disconnection. The Authority Having Jurisdiction orthe serving gas supplier is hereby authorized to disconnectgas piping or appliance or both that shall be found not to bein accordance with the requirements of this code or that arefound defective and in such condition as to endanger life orproperty.1206.2 Notice. Where such disconnection has been made, anotice shall be attached to such gas piping or appliance orboth that shall state the same has been disconnected, togetherwith the reasons thereof.1206.3 Capped Outlets. It shall be unlawful to remove ordisconnect gas piping or gas appliance without capping orplugging with a screw joint fitting, the outlet from which saidpipe or appliance was removed. Outlets to which gas appli-ances are not connected shall be left capped, gastight on apiping system that has been installed, altered, or repaired.Exception: Where an approved listed quick-disconnect de-vice is used.

1207.0 Temporary Use of Gas.1207.1 General. Where temporary use of gas is desired andthe Authority Having Jurisdiction deems the use necessary, apermit shall be permitted to be issued for such use for a pe-riod of time not to exceed that designated by the AuthorityHaving Jurisdiction, provided that such gas piping system

otherwise is in accordance with the requirements of this coderegarding material, sizing, and safety.

1208.0 Gas Piping System Design, Materials, and Com-ponents.1208.1 Installation of Piping System. Where required by theAuthority Having Jurisdiction, a piping sketch or plan shall beprepared before proceeding with the installation. This planshall show the proposed location of piping, the size of differ-ent branches, the various load demands, and the location ofthe point of delivery. [NFPA 54:5.1.1]

1208.1.1 Addition to Existing System. Where addi-tional appliances are being connected to a gas piping sys-tem, the existing piping shall be checked to determinewhether it has adequate capacity. Where inadequate, theexisting system shall be enlarged as required, or separategas piping of approved capacity shall be provided.[NFPA 54:5.1.2]

1208.2 Provision for Location of Point of Delivery. The lo-cation of the point of delivery shall be acceptable to the serv-ing gas supplier. [NFPA 54:5.2]1208.3 Interconnections Between Gas Piping Systems.

1208.3.1 Interconnections Supplying Separate Users.Where two or more meters, or two or more service reg-ulators where meters are not provided, are located on thesame premises and supply separate users, the gas pipingsystems shall not be interconnected on the outlet side ofthe meters or service regulators. [NFPA 54:5.3.1]1208.3.2 Interconnections for Standby Fuels. Where asupplementary gas for standby use is connected down-stream from a meter or a service regulator where a meteris not provided, a device to prevent backflow shall be in-stalled. A three-way valve installed to admit the standbysupply, and at the same time shut off the regular supply,shall be permitted to be used for this purpose. [NFPA54:5.3.2]

1208.4 Sizing of Gas Piping Systems. Gas piping systemsshall be of such size and so installed as to provide a supply ofgas to meet the maximum demand and supply gas to each ap-pliance inlet at not less than the minimum supply pressure re-quired by the appliance. [NFPA 54:5.4.1]

1208.4.1 Maximum Gas Demand. The volumetric flowrate of gas to be provided (in cubic feet per hour) shall becalculated using the manufacturer’s input ratings of theappliance served, adjusted for altitude. Where the inputrating is not indicated, the gas supplier, appliance manu-facturer, or a qualified agency shall be contacted or therating from Table 1208.4.1 shall be used for estimatingthe volumetric flow rate of gas to be supplied.

The total connected hourly load shall be used as thebasis for piping sizing, assuming the appliances are op-erating at full capacity simultaneously.Exception: Sizing shall be permitted to be based uponestablished load diversity factors. [NFPA 54-12:5.4.2]1208.4.2 Sizing Methods. Gas piping shall be sized inaccordance with one of the following:

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(1) Pipe sizing tables or sizing equations in this chapter.(2) Other approved engineering methods acceptable to

the Authority Having Jurisdiction.(3) Sizing tables included in a listed piping system man-

ufacturer’s instructions. [NFPA 54:5.4.3]1208.4.3 Allowable Pressure Drop. The design pressureloss in a piping system under maximum probable flowconditions, from the point of delivery to the inlet con-nection of the appliance, shall be such that the supply

pressure at the appliance is greater than or equal to theminimum pressure required by the appliance. [NFPA54:5.4.4]

1208.5 Acceptable Piping Materials and Joining Methods.Materials used for piping systems shall be in accordance withthe requirements of this chapter or shall be acceptable to theAuthority Having Jurisdiction. [NFPA 54:5.6.1.1]

1208.5.1 Materials. Pipe, fittings, valves, or other ma-terials shall not be used again unless they are free of for-eign materials and have been ascertained to be approvedfor the service intended. [NFPA 54:5.6.1.2]

1208.5.1.1 Other Materials. Material not coveredby the standards specifications listed herein shall beinvestigated and tested to determine that it is safe forthe proposed service and, in addition, shall be rec-ommended for that service by the manufacturer andshall be acceptable to the Authority Having Juris-diction. [NFPA 54:5.6.1.3]

1208.5.2 Metallic Pipe.1208.5.2.1 Cast-Iron. Cast-iron pipe shall not beused. [NFPA 54:5.6.2.1]1208.5.2.2 Steel and Wrought-Iron. Steel andwrought-iron pipe shall be not less than standardweight (Schedule 40) and shall comply with one ofthe following standards:(1) ASME B36.10(2) ASTM A 53(3) ASTM A 106 [NFPA 54:5.6.2.2]1208.5.2.3 Copper and Brass. Copper and brasspipe shall not be used where the gas contains morethan an average of 0.3 grains of hydrogen sulfide per100 standard cubic feet (scf) of gas (0.7 mg/100 L).[NFPA 54:5.6.2.3]

Threaded copper, brass, or aluminum alloy pipeshall not be used with gases corrosive to such mate-rial. [NFPA 54:5.6.2.4]1208.5.2.4 Aluminum Alloy.Aluminum alloy pipeshall comply with ASTM B 241 (except that the useof alloy 5456 is prohibited) and shall be marked ateach end of each length indicating compliance. Alu-minum alloy pipe shall be coated to protect againstexternal corrosion where it is in contact with ma-sonry, plaster, insulation or is subject to repeatedwettings by such liquids as water, detergents, orsewage. [NFPA 54:5.6.2.5]

Aluminum alloy pipe shall not be used in exte-rior locations or underground. [NFPA 54:5.6.2.6]

1208.5.3 Metallic Tubing. Seamless copper, aluminumalloy, or steel tubing shall not be used with gases corro-sive to such material. [NFPA 54:5.6.3]

1208.5.3.1 Steel. Steel tubing shall comply withASTM A 254. [NFPA 54:5.6.3.1]1208.5.3.2 Copper and Brass. Copper and brasstubing shall not be used where the gas contains more


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APPLIANCE INPUT(Btu/h approx.)

Space Heating UnitsWarm air furnace

Single familyMultifamily, per unit

Hydronic boilerSingle familyMultifamily, per unit

100 00060 000

100 00060 000

Space and Water Heating UnitsHydronic boiler

Single familyMultifamily, per unit

120 00075 000

Water Heating AppliancesWater heater, automatic storage

30 to 40 gallon tankWater heater, automatic storage

50 gallon tankWater heater, automatic instantaneous

Capacity at 2 gallons per minuteCapacity at 4 gallons per minuteCapacity at 6 gallons per minute

Water heater, domestic, circulating orside-arm

35 000

50 000

142 800285 000428 400

35 000

Cooking AppliancesRange, freestanding, domestic Built-in oven or broiler unit, domesticBuilt-in top unit, domestic

65 00025 00040 000

Other AppliancesRefrigeratorClothes dryer, Type 1 (domestic)Gas fireplace direct ventGas logBarbecueGaslight

300035 00040 00080 00040 0002500

TABLE 1208.4.1APPROXIMATE GAS INPUT FOR

TYPICAL APPLIANCES[NFPA 54: TABLE 5.4.2.1]

For SI units: 1000 British thermal units per hour = 0.293 kW

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than an average of 0.3 grains of hydrogen sulfide per100 scf of gas (0.7 mg/100 L). Copper tubing shallcomply with standard Type K or L of ASTM B 88 orASTM B 280. [NFPA 54:5.6.3.2]1208.5.3.3 Aluminum Alloy. Aluminum alloy tub-ing shall comply with ASTM B 210 or ASTM B 241.Aluminum alloy tubing shall be coated to protectagainst external corrosion where it is in contact withmasonry, plaster, insulation, or is subject to repeatedwettings by such liquids as water, detergent, orsewage. Aluminum alloy tubing shall not be used inexterior locations or underground. [NFPA 54:5.6.3.3]1208.5.3.4 Corrugated Stainless Steel. Corrugatedstainless steel tubing shall be tested and listed in ac-cordance with the construction, installation, and per-formance requirements of CSA LC-1. [NFPA54:5.6.3.4]

1208.5.4 Plastic Pipe, Tubing, and Fittings. Polyethyl-ene plastic pipe, tubing, and fittings used to supply fuelgas shall be in accordance with ASTM D 2513. Pipe tobe used shall be marked "gas" and "ASTM D 2513.”[NFPA 54-12:5.6.4.1.1]

1208.5.4.1 Regulator Vent Piping. Plastic pipe andfittings used to connect regulator vents to remotevent terminations shall be PVC in accordance withUL 651. PVC vent piping shall not be installed in-doors. [NFPA 54-12:5.6.4.2]1208.5.4.2 Anodeless Risers. Anodeless risers shallcomply with Section 1208.5.4.2(A) through Section1208.5.4.2(C). [NFPA 54:5.6.4.3]

1208.5.4.2(A) Factory-Assembled AnodelessRisers. Factory-assembled anodeless risers shallbe recommended by the manufacturer for the gasused and shall be leak-tested by the manufacturerin accordance with written procedures. [NFPA54:5.6.4.3(1)]1208.5.4.2(B) Service Head Adapters andField-Assembled Anodeless Risers. Servicehead adapters and field-assembled anodelessrisers incorporating service head adapters shallbe recommended by the manufacturer for thegas used and shall be design-certified to be inaccordance with the requirements of Category Iof ASTM D 2513. The manufacturer shall pro-vide the user qualified installation instructions.[NFPA 54:5.6.4.3(2)]1208.5.4.2(C) Undiluted Liquefied PetroleumGas Piping. The use of plastic pipe, tubing, andfittings in undiluted liquefied petroleum gaspiping systems shall be in accordance withNFPA 58. [NFPA 54:5.6.4.3(3)]

1208.5.5 Workmanship and Defects. Gas pipe, tubing,and fittings shall be clear and free from cutting burrs anddefects in structure or threading, and shall be thoroughlybrushed and chip and scale blown. Defects in pipe, tub-ing, and fittings shall not be repaired. Defective pipe, tub-ing, and fittings shall be replaced. [NFPA 54:5.6.5]

1208.5.6 Protective Coating. Where in contact with ma-terial or atmosphere exerting a corrosive action, metallicpiping and fittings coated with a corrosion-resistant ma-terial shall be used. External or internal coatings or lin-ings used on piping or components shall not beconsidered as adding strength. [NFPA 54:5.6.6]1208.5.7 Metallic Pipe Threads. Metallic pipe and fit-ting threads shall be taper pipe threads and shall complywith ASME B1.20.1. [NFPA 54:5.6.7.1]

1208.5.7.1 Damaged Threads. Pipe with threadsthat are stripped, chipped, corroded, or otherwisedamaged shall not be used. Where a weld opens dur-ing the operation of cutting or threading, that por-tion of the pipe shall not be used. [NFPA 54:5.6.7.2]1208.5.7.2 Number of Threads. Field threading ofmetallic pipe shall be in accordance with Table1208.5.7.2. [NFPA 54:5.6.7.3]

1208.5.7.3 Thread Joint Compounds. Thread jointcompounds shall be resistant to the action of lique-fied petroleum gas or to other chemical constituentsof the gases to be conducted through the piping.[NFPA 54-12:5.6.7.4]

1208.5.8 Metallic Piping Joints and Fittings. The typeof piping joint used shall be approved for the pressure-temperature conditions and shall be selected giving con-sideration to joint tightness and mechanical strengthunder the service conditions. The joint shall be able tosustain the maximum end force due to the internal pres-sure and additional forces due to temperature expansionor contraction, vibration, fatigue, or to the weight of thepipe and its contents. [NFPA 54:5.6.8]

1208.5.8.1 Pipe Joints. Pipe joints shall be threaded,flanged, brazed, or welded. Where nonferrous pipeis brazed, the brazing materials shall have a meltingpoint in excess of 1000°F (538°C). Brazing alloys

IRONPIPE SIZE(inches)

APPROXIMATE LENGTH OFTHREADED PORTION

(inches)

APPROXIMATE NUM-BER OF THREADS TO

BE CUT1⁄2 3⁄4 103⁄4 3⁄4 101 7⁄8 10

11⁄4 1 1111⁄2 1 112 1 11

21⁄2 11⁄2 123 11⁄2 124 15⁄8 13

TABLE 1208.5.7.2SPECIFICATIONS FOR THREADING METALLIC PIPE

[NFPA 54: TABLE 5.6.7.3]

For SI units: 1 inch = 25.4 mmREAD ONLY

shall not contain more than 0.05 percent phospho-rus. [NFPA 54:5.6.8.1]1208.5.8.2 Tubing Joints. Tubing joints shall eitherbe made with approved gas tubing fittings, be brazedwith a material having a melting point in excess of1000°F (538°C), or made by press-connect fittingsin accordance with CSA LC-4. Brazing alloys shallnot contain more than 0.05 percent phosphorus.[NFPA 54:5.6.8.2]1208.5.8.3 Flared Joints. Flared joints shall be usedin systems constructed from nonferrous pipe andtubing where experience or tests have demonstratedthat the joint is approved for the conditions andwhere provisions are made in the design to preventseparation of the joints. [NFPA 54:5.6.8.3]1208.5.8.4 Metallic Pipe Fittings (IncludingValves, Strainers, Filters). Metallic pipe fittingsshall comply with the following:(1) Threaded fittings in sizes exceeding 4 inches

(100 mm) shall not be used unless acceptable tothe Authority Having Jurisdiction.

(2) Fittings used with steel or wrought-iron pipeshall be steel, brass, bronze, malleable iron, orcast-iron.

(3) Fittings used with copper or brass pipe shall becopper, brass, or bronze.

(4) Fittings used with aluminum alloy pipe shall beof aluminum alloy.

(5) Cast-iron fittings.(a) Flanges shall be permitted.(b) Bushings shall not be used.(c) Fittings shall not be used in systems con-

taining flammable gas-air mixtures.(d) Fittings in sizes 4 inches (100 mm) and

larger shall not be used indoors unless ap-proved by the Authority Having Jurisdic-tion.

(e) Fittings in sizes 6 inches (150 mm) andlarger shall not be used unless approved bythe Authority Having Jurisdiction.

(6) Aluminum alloy fitting threads shall not formthe joint seal.

(7) Zinc-aluminum alloy fittings shall not be usedin systems containing flammable gas-air mix-tures.

(8) Special fittings such as couplings; proprietary-type joints; saddle tees; gland-type compressionfittings; and flared, flareless, or compression-type tubing fittings shall be:(a) Used within the fitting manufacturer’s

pressure-temperature recommendations.(b) Used within the service conditions antici-

pated with respect to vibration, fatigue,thermal expansion, or contraction.

(c) Installed or braced to prevent separation ofthe joint by gas pressure or external physi-cal damage.

(d) Acceptable to the Authority Having Juris-diction. [NFPA 54:5.6.8.4]

1208.5.9 Plastic Piping, Joints, and Fittings. Plasticpipe, tubing, and fittings shall be installed in accordancewith the manufacturer’s installation instructions. Section1208.5.9.1 through Section 1208.5.9.4 shall be observedwhere making such joints. [NFPA 54:5.6.9]

1208.5.9.1 Joint Design. The joint shall be designedand installed so that the longitudinal pullout resist-ance of the joint shall be equal to the tensile strengthof the plastic piping material. [NFPA 54:5.6.9(1)]1208.5.9.2 Heat-Fusion Joint. Heat-fusion jointsshall be made in accordance with AWS B2.4. Jointsshall be made with the joining method recommendedby the pipe manufacturer. Heat-fusion fittings shallbe marked "ASTM D 2513." [NFPA 54:5.6.9(2)]1208.5.9.3 Compression-Type Mechanical Joints.Where compression-type mechanical joints are used,the gasket material in the fitting shall be compatiblewith the plastic piping and with the gas distributed bythe system. An internal tubular rigid stiffener shall beused in conjunction with the fitting. The stiffener shallbe flush with the end of the pipe or tubing, shall extendnot less than the outside end of the pipe or tubing, andshall extend not less than to the outside end of thecompression fitting where installed. The stiffener shallbe free of rough or sharp edges and shall not be aforced fit in the plastic. Split tubular stiffeners shallnot be used. [NFPA 54:5.6.9(3)]1208.5.9.4 Liquefied Petroleum Gas Piping Sys-tems. Plastic piping joints and fittings for use in liq-uefied petroleum gas piping systems shall be inaccordance with NFPA 58. [NFPA 54:5.6.9(4)]

1208.5.10 Flanges. Flanges shall comply with ASMEB16.1, ASME B16.20, or MSS SP-6. The pressure-tem-perature ratings shall equal or exceed that required by theapplication. [NFPA 54:5.6.10]

1208.5.10.1 Flange Facings. Standard facings shallbe permitted for use under this code. Where 150 psi(1034 kPa) steel flanges are bolted to Class 125 cast-iron flanges, the raised face on the steel flange shallbe removed. [NFPA 54:5.6.10.1]1208.5.10.2 Lapped Flanges. Lapped flanges shallbe used aboveground or in exposed locations acces-sible for inspection. [NFPA 54:5.6.10.2]

1208.5.11 Flange Gaskets. The material for gaskets shallbe capable of withstanding the design temperature andpressure of the piping system and the chemical con-stituents of the gas being conducted without change toits chemical and physical properties. The effects of fireexposure to the joint shall be considered in choosing thematerial. [NFPA 54:5.6.11] Flange gaskets shall complywith the following requirements:


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(1) Acceptable materials include the following:(a) Metal (plain or corrugated)(b) Composition(c) Aluminum "O" rings and spiral-wound metal

gaskets [NFPA 54-12:5.6.11.1](2) Where a flanged joint is opened, the gasket shall be

replaced. [NFPA 54:5.6.11.2](3) Full-face gaskets shall be used with bronze and cast-

iron flanges. [NFPA 54:5.6.11.3]1208.6 Gas Meters. Gas meters shall be selected for the max-imum expected pressure and permissible pressure drop.[NFPA 54:5.7.1]

1208.6.1 Location. Gas meters shall be located in venti-lated spaces readily accessible for examination, reading,replacement, or necessary maintenance. [NFPA54:5.7.2.1]

1208.6.1.1 Subject to Damage. Gas meters shall notbe placed where they will be subjected to damage,such as adjacent to a driveway; under a fire escape;in public passages, halls, or coal bins; or where theywill be subject to excessive corrosion or vibration.[NFPA 54:5.7.2.2]1208.6.1.2 Extreme Temperatures. Gas metersshall not be located where they will be subjected toextreme temperatures or sudden extreme changes intemperature. Meters shall not be located in areaswhere they are subjected to temperatures beyondthose recommended by the manufacturer. [NFPA54:5.7.2.3]

1208.6.2 Supports. Gas meters shall be supported orconnected to rigid piping so as not to exert a strain on themeters. Where flexible connectors are used to connect agas meter to downstream piping at mobile homes in mo-bile home parks, the meter shall be supported by a postor bracket placed in a firm footing or by other means pro-viding equivalent support. [NFPA 54:5.7.3]1208.6.3 Meter Protection. Meters shall be protectedagainst overpressure, backpressure, and vacuum. [NFPA54-12:5.7.4]1208.6.4 Identification. Gas piping at multiple meter in-stallations shall be marked by a metal tag or other per-manent means attached by the installing agency,designating the building or the part of the building beingsupplied. [NFPA 54:5.7.5]

1208.7 Gas Pressure Regulators. A line gas pressure regu-lator shall be installed where the gas supply pressure exceedsthat at which the appliance is designed to operate or variesbeyond design pressure limits. [NFPA 54-12:5.8.1]

1208.7.1 Overpressure Protection. Where the gas sup-ply design pressure in piping systems located indoors ex-ceeds 2 psi (14 kPa) and line pressure regulators areinstalled to reduce the supply pressure to 14 inches watercolumn (3.5 kPa) or less, the following shall apply:(1) Regulators shall be provided with factory installed

overpressure protection devices.

(2) Overpressure protection devices shall limit the pres-sure downstream of the line pressure regulator to 2psi (14 kPa) in the event of failure of the line pres-sure regulator. [NFPA 54-12:5.8.3]

1208.7.2 Listing. Line gas pressure regulators shall belisted in accordance with CSA Z21.80. [NFPA 54:5.8.2]1208.7.3 Location. The gas pressure regulator shall beaccessible for servicing. [NFPA 54:5.8.3]1208.7.4 Regulator Protection. Pressure regulators shallbe protected against physical damage. [NFPA 54:5.8.4]1208.7.5 Venting.

1208.7.5.1 Line Gas Pressure Regulators. Linegas pressure regulators shall be installed in accor-dance with the following requirements:(1) An independent vent to the exterior of the build-

ing, sized in accordance with the regulator man-ufacturer’s instructions, shall be provided wherethe location of a regulator is such that a ruptureddiaphragm will cause a hazard. Where morethan one regulator is at a location, each regula-tor shall have a separate vent to the outdoors, orwhere approved by the Authority Having Juris-diction, the vent lines shall be permitted to bemanifolded in accordance with accepted engi-neering practices to minimize backpressure inthe event of diaphragm failure. Materials forvent piping shall comply with Section 1208.5.Exception: A regulator and vent limiting meanscombination listed in accordance with CSAZ21.80 shall be permitted to be used without avent to the outdoors.

(2) The vent shall be designed to prevent the entryof water, insects, or other foreign materials thatwill cause blockage.

(3) The regulator vent shall terminate not less than3 feet (914 mm) from a source of ignition.

(4) At locations where regulators will be sub-merged during floods, a special antiflood-typebreather vent fitting shall be installed, or thevent line shall be extended above the height ofthe expected flood waters.

(5) A regulator shall not be vented to the applianceflue or exhaust system. [NFPA 54:5.8.5.1]

1208.7.5.2 Venting of Gas Appliance PressureRegulators. Venting of gas appliance pressure reg-ulators shall be in accordance with the following re-quirements:(1) Appliance pressure regulators requiring access

to the atmosphere for successful operation shallbe equipped with vent piping leading outdoorsor, where the regulator vent is an integral part ofthe appliance, into the combustion chamber ad-jacent to a continuous pilot, unless constructedor equipped with a vent-limiting means to limitthe escape of gas from the vent opening in theevent of diaphragm failure.

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(2) Vent limiting means shall be employed on listedappliance pressure regulators.

(3) In the case of vents leading outdoors, meansshall be employed to prevent water from enter-ing this piping and also to prevent blockage ofvents by insects and foreign matter.

(4) Under no circumstances shall a regulator bevented to the appliance flue or exhaust system.

(5) In the case of vents entering the combustionchamber, the vent shall be located so the escap-ing gas will be readily ignited by the pilot andthe heat liberated thereby will not adversely af-fect the normal operation of the safety shutoffsystem. The terminus of the vent shall be se-curely held in a fixed position relative to thepilot. For manufactured gas, the need for aflame arrester in the vent piping shall be deter-mined.

(6) Vent lines from a gas appliance pressure regu-lator and bleed lines from a diaphragm-typevalve shall not be connected to a common man-ifold terminating in a combustion chamber. Ventlines shall not terminate in positive-pressure-type combustion chambers. [NFPA 54:9.1.19]

1208.7.5.3 Discharge of Vents. The discharge ofvents shall be in accordance with the following re-quirements:(1) The discharge stacks, vents, or outlet parts of

pressure-relieving and pressure-limiting devicesshall be located so that gas is safely dischargedinto the outdoors.

(2) Discharge stacks or vents shall be designed toprevent the entry of water, insects, or other for-eign material that could cause blockage. Thedischarge stack or vent line shall be not lessthan the same size as the outlet of the pressure-relieving device. [NFPA 54:5.9.7]

1208.7.6 Bypass Piping. Valved and regulated bypassesshall be permitted to be placed around gas line pressureregulators where continuity of service is imperative.[NFPA 54:5.8.6]1208.7.7 Identification. Line pressure regulators at mul-tiple regulator installations shall be marked by a metaltag or other permanent means designating the buildingor the part of the building being supplied. [NFPA54:5.8.7]

1208.8 Backpressure Protection. Protective devices shall beinstalled as close to the appliance as practical where the designof the appliance connected is such that air, oxygen, or standbygases are capable of being forced into the gas supply system.Gas and air combustion mixers incorporating double di-aphragm "zero" or "atmosphere" governors or regulators shallrequire no further protection unless connected directly to com-pressed air or oxygen at pressures of 5 psi (34 kPa) or more.[NFPA 54:5.10.1]

1208.8.1 Protective Devices. Protective devices shall in-clude, but not be limited to the following:

(1) Check valves.(2) Three-way valves (of the type that completely closes

one side before starting to open the other side).(3) Reverse flow indicators controlling positive shutoff

valves.(4) Normally closed air-actuated positive shutoff pres-

sure regulators. [NFPA 54:5.10.2]1208.9 Low-Pressure Protection. A protective device shallbe installed between the meter and the appliance or equip-ment where the operation of the appliance or equipment issuch that it is capable of producing a vacuum or a dangerousreduction in gas pressure at the meter. Such protective devicesinclude, but are not limited to, mechanical, diaphragm-oper-ated, or electrically operated low-pressure shutoff valves.[NFPA 54-12:5.11]1208.10 Shutoff Valves. Shutoff valves shall be approvedand shall be selected giving consideration to pressure drop,service involved, emergency use, and reliability of operation.Shutoff valves of size 1 inch (25 mm) National Pipe Threadand smaller shall be listed. [NFPA 54:5.12]1208.11 Expansion and Flexibility. Piping systems shall bedesigned to prevent failure from thermal expansion or con-traction. [NFPA 54-12:5.14.1]

1208.11.1 Special Local Conditions. Where local con-ditions include earthquake, tornado, unstable ground, orflood hazards, special consideration shall be given to in-creased strength and flexibility of piping supports andconnections. [NFPA 54:5.14.2]

1209.0 Excess Flow Valve.1209.1 General. Where automatic excess flow valves are in-stalled, they shall be listed, sized, and installed in accordancewith the manufacturer’s installation instructions. [NFPA54:5.13]

1210.0 Gas Piping Installation.1210.1 Piping Underground. Underground gas piping shallbe installed with approved clearance from other undergroundstructures to avoid contact therewith, to allow maintenance,and to protect against damage from proximity to other struc-tures. In addition, underground plastic piping shall be in-stalled with approved clearance or shall be insulated fromsources of heat so as to prevent the heat from impairing theserviceability of the pipe. [NFPA 54:7.1.1]

1210.1.1 Cover Requirements.Underground piping sys-tems shall be installed with a cover not less than 18inches (457 mm). Where external damage to the pipe isnot likely to result, the cover shall be not less than 12inches (305 mm). Where a cover not less than 12 inches(305 mm) cannot be provided, the pipe shall be installedin conduit or bridged (shielded). [NFPA 54:7.1.2.1]1210.1.2 Trenches. The trench shall be graded so thatthe pipe has a firm, substantially continuous bearing onthe bottom of the trench. [NFPA 54:7.1.2.2]

1210.1.2.1 Backfilling. Where flooding of thetrench is done to consolidate the backfill, care shall


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be exercised to see that the pipe is not floated fromits firm bearing on the trench bottom. [NFPA54:7.1.2.3]

1210.1.3 Protection Against Corrosion. Gas piping incontact with earth or other material that is capable of cor-roding the piping shall be protected against corrosion inan approved manner. Where dissimilar metals are joinedunderground, an insulating coupling or fitting shall beused. Piping shall not be laid in contact with cinders. Un-coated threaded or socket-welded joints shall not be usedin piping in contact with soil or where internal or exter-nal crevice corrosion is known to occur. [NFPA 54:7.1.3]1210.1.4 Protection Against Freezing. Where the for-mation of hydrates or ice is known to occur, piping shallbe protected against freezing. [NFPA 54:7.1.4]1210.1.5 Piping Through Foundation Wall. Under-ground piping installed through the outer foundation orbasement wall of a building shall be encased in a pro-tective sleeve or protected by an approved device ormethod. The space between the gas piping and the sleeveand between the sleeve and the wall shall be sealed toprevent entry of gas and water. [NFPA 54-12:7.1.5]1210.1.6 Piping Underground Beneath Buildings.Where gas piping is installed underground beneath build-ings, the piping shall be either:(1) Encased in an approved conduit designed to with-

stand the imposed loads and installed in accordancewith Section 1210.1.6.1 or Section 1210.1.6.2.

(2) A piping or encasement system listed for installationbeneath buildings. [NFPA 54-12:7.1.6]1210.1.6.1 Conduit with One End TerminatingOutdoors. The conduit shall extend into a normallyusable and accessible portion of the building and, atthe point where the conduit terminates in the build-ing, the space between the conduit and the gas pip-ing shall be sealed to prevent the possible entranceof a gas leakage. Where the end sealing is of a typethat will retain the full pressure of the pipe, the con-duit shall be designed for the same pressure as thepipe. The conduit shall extend not less than 4 inches(102 mm) outside the building, be vented outdoorsabove finished ground level, and be installed so as toprevent the entrance of water and insects. [NFPA54:7.1.6.1]1210.1.6.2 Conduit with Both Ends TerminatingIndoors. Where the conduit originates and termi-nates within the same building, the conduit shalloriginate and terminate in an accessible portion ofthe building and shall not be sealed. [NFPA54:7.1.6.2]

1210.1.7 Plastic Piping. Plastic piping shall be installedoutdoors, underground only.Exceptions:(1) Plastic piping shall be permitted to terminate above-

ground where an anodeless riser is used.

(2) Plastic piping shall be permitted to terminate with awall head adapter aboveground in buildings, in-cluding basements, where the plastic piping is in-serted in a piping material permitted for use inbuildings. [NFPA 54-12:7.1.7.1]1210.1.7.1 Connections Between Metallic andPlastic Piping. Connections made between metal-lic and plastic piping shall be made with fittings thatare in accordance with one of the following:(1) ASTM D 2513(2) ASTM F 1973(3) ASTM F 2509 [NFPA 54:7.1.7.2]1210.1.7.2 Tracer Wire.An electrically continuouscorrosion-resistant tracer wire (not less than AWG14) or tape shall be buried with the plastic pipe tofacilitate locating. One end shall be brought above-ground at a building wall or riser. [NFPA 54:7.1.7.3]

1210.2 Installation of Piping. Piping installed abovegroundshall be securely supported and located where it will be pro-tected from physical damage. Where passing through an ex-terior wall, the piping shall be protected against corrosion bycoating or wrapping with an inert material approved for suchapplications. The piping shall be sealed around its circumfer-ence at the point of the exterior penetration to prevent theentry of water, insects, and rodents. Where piping is encasedin a protective pipe sleeve, the annular spaces between thegas piping and the sleeve and between the sleeve and the wallopening shall be sealed. [NFPA 54-12:7.2.1]

1210.2.1 Building Structure. The installation of gas pip-ing shall not cause structural stresses within buildingcomponents to exceed allowable design limits. Approvalshall be obtained before beams or joists are cut ornotched. [NFPA 54:7.2.2]

Permission shall be obtained from the AuthorityHaving Jurisdiction.1210.2.2 Gas Piping to be Sloped. Piping for other thandry gas conditions shall be sloped not less than 1⁄4 inch in15 feet (1.4 mm/m) to prevent traps. [NFPA 54:7.2.4]

1210.2.2.1 Ceiling Locations. Gas piping shall bepermitted to be installed in accessible spaces be-tween a fixed ceiling and a dropped ceiling, whetheror not such spaces are used as a plenum. Valves shallnot be located in such spaces.Exception: Appliance shutoff valves required bythis code shall be permitted to be installed in acces-sible spaces containing vented appliances.

1210.2.3 Prohibited Locations. Gas piping inside a build-ing shall not be installed in or through a clothes chute,chimney or gas vent, dumbwaiter, elevator shaft, or airduct, other than combustion air ducts. [NFPA 54:7.2.5]Exception: Ducts used to provide ventilation air in ac-cordance with Section 506.0 or to above-ceiling spaces inaccordance with Section 1210.2.2.1.

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1210.2.4 Hangers, Supports, and Anchors. Piping shallbe supported with metal pipe hooks, metal pipe straps,metal bands, metal brackets, metal hangers, or buildingstructural components; approved for the size of piping; ofadequate strength and quality; and located at intervals soas to prevent or damp out excessive vibration. Pipingshall be anchored to prevent undue strains on connectedappliances and equipment and shall not be supported byother piping. Pipe hangers and supports shall complywith the requirements of MSS SP-58. [NFPA 54:7.2.6.1]

1210.2.4.1 Spacing. Spacing of supports in gas pip-ing installations shall not exceed the distance shownin Table 1210.2.4.1. Spacing of supports for CSSTshall be in accordance with the CSST manufac-turer’s instructions. [NFPA 54:7.2.6.2]

1210.2.4.2 Expansion and Contraction. Supports,hangers, and anchors shall be installed so as not tointerfere with the free expansion and contraction ofthe piping between anchors. Parts of the supportingsystem shall be designed and installed so they arenot disengaged by movement of the supported pip-ing. [NFPA 54:7.2.6.3]

1210.2.5 Removal of Piping. Where piping containinggas is to be removed, the line shall be first disconnectedfrom sources of gas and then thoroughly purged with air,water, or inert gas before cutting or welding is done.[NFPA 54-12:7.2.6]

1210.3 Concealed Piping in Buildings. Gas piping in con-cealed locations shall be installed in accordance with this sec-tion. [NFPA 54:7.3.1]

1210.3.1 Connections. Where gas piping is to be con-cealed, connections shall be of the following type:(1) Pipe fittings such as elbows, tees, couplings, and

right/left nipple/couplings.(2) Joining tubing by brazing (see Section 1208.5.8.2).

[NFPA 54:7.3.2(2)](3) Fittings listed for use in concealed spaces or that

have been demonstrated to sustain, without leakage,forces due to temperature expansion or contraction,vibration, or fatigue based on their geographic loca-tion, application, or operation. [NFPA 54:7.3.2(3)]

(4) Where necessary to insert fittings in gas pipe thathas been installed in a concealed location, the pipeshall be reconnected by welding, flanges, or the useof a right/left nipple/coupling.

1210.3.2 Piping in Partitions. Concealed gas pipingshall not be located in solid partitions. [NFPA 54:7.3.3]1210.3.3 Tubing in Partitions. This provision shall notapply to tubing that pierces walls, floors, or partitions.Tubing installed vertically and horizontally inside hol-low walls or partitions without protection along its en-tire concealed length shall be in accordance with thefollowing requirements:(1) A steel striker barrier not less than 0.0508 of an inch

(1.3 mm) thick, or equivalent, shall be installed be-tween the tubing and the finished wall and extendnot less than 4 inches (102 mm) beyond concealedpenetrations of plates, firestops, wall studs, and sim-ilar construction features.

(2) The tubing shall be installed in single runs and shallnot be rigidly secured. [NFPA 54:7.3.4]

1210.3.4 Piping in Floors. In industrial occupancies, gaspiping in solid floors such as concrete shall be laid inchannels in the floor and covered to permit access to thepiping with minimum damage to the building. Wherepiping in floor channels is exposed to excessive moistureor corrosive substances, the piping shall be protected inan approved manner. [NFPA 54:7.3.5.1]Exception: In other than industrial occupancies andwhere approved by the Authority Having Jurisdiction,gas piping embedded in concrete floor slabs constructedwith portland cement shall be surrounded with not lessthan 11⁄2 inches (38 mm) of concrete and shall not be inphysical contact with other metallic structures such as re-inforcing rods or electrically neutral conductors. Piping,fittings, and risers shall be protected against corrosion inaccordance with Section 1208.5.6. Piping shall not beembedded in concrete slabs containing quick-set addi-tives or cinder aggregate. [NFPA 54:7.3.5.2]

1210.4 Piping in Vertical Chases. Where gas piping ex-ceeding 5 psi (34 kPa) is located within vertical chases in ac-cordance with Section 1210.5(2), the requirements of Section1210.4.1 through Section 1210.4.3 shall apply. [NFPA 54:7.4]

1210.4.1 Pressure Reduction.Where pressure reductionis required in branch connections in accordance withSection 1210.5, such reduction shall take place either in-side the chase or immediately adjacent to the outside wallof the chase. Regulator venting and downstream over-pressure protection shall comply with Section 1208.7.1and Section 1208.7.5. The regulator shall be accessiblefor service and repair, and vented in accordance with oneof the following:(1) Where the fuel gas is lighter than air, regulators

equipped with a vent limiting means shall be per-mitted to be vented into the chase. Regulators notequipped with a vent limiting means shall be per-mitted to be vented either directly to the outdoors orto a point within the top 1 foot (305 mm) of thechase.

STEEL PIPE, NOMINAL SIZEOF PIPE(inches)

SPACING OFSUPPORTS(feet)

NOMINAL SIZEOF TUBING

SMOOTH-WALL(inches O.D.)

SPACING OFSUPPORTS(feet)

1⁄2 6 1⁄2 43⁄4 or 1 8 5⁄8 or 3⁄4 6

11⁄4 or larger(horizontal)

10 7⁄8 or 1(horizontal)

8

11⁄4 or larger (vertical)

Every floorlevel

1 or larger (vertical)

Every floorlevel

TABLE 1210.2.4.1SUPPORT OF PIPING[NFPA 54: TABLE 7.2.6.2]

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm


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(2) Where the fuel gas is heavier than air, the regulatorvent shall be vented directly to the outdoors. [NFPA54:7.4.1]

1210.4.2 Construction. Chase construction shall com-ply with local building codes with respect to fire resist-ance and protection of horizontal and vertical openings.[NFPA 54:7.4.2]1210.4.3 Ventilation. A chase shall be ventilated to theoutdoors and at the top. The openings shall have a mini-mum free area [in square inches (m2)] equal to the prod-uct of one-half of the maximum pressure in the piping[in psi (kPa)] times the largest nominal diameter of thatpiping [in inches (mm)], or the cross-sectional area ofthe chase, whichever is smaller. Where more than onefuel gas piping system is present, the free area for eachsystem shall be calculated and the largest area used.[NFPA 54:7.4.3]

1210.5 Maximum Design Operating Pressure. The maxi-mum design operating pressure for piping systems located in-side buildings shall not exceed 5 psi (34 kPa) unless one ormore of the following conditions are met:(1) The piping system is welded.(2) The piping is located in a ventilated chase or otherwise en-

closed for protection against accidental gas accumulation.(3) The piping is located inside buildings or separate areas of

buildings used exclusively for one of the following:(a) Industrial processing or heating(b) Research(c) Warehousing(d) Boiler or mechanical equipment rooms

(4) The piping is a temporary installation for buildings underconstruction.

(5) The piping serves appliances or equipment used for agri-cultural purposes.

(6) The piping system is an LP-Gas piping system with a de-sign operating pressure exceeding 20 psi (138 kPa) andin accordance with NFPA 58. LP-Gas systems designedto operate below -5°F (-21°C) or with butane or apropane-butane mix shall be designed to either accom-modate liquid LP-Gas or to prevent LP-Gas vapor fromcondensing back into liquid. [NFPA 54:5.5]1210.5.1 Liquefied Petroleum Gas Systems. The max-imum operating pressure of LP-Gas piping systems shallbe:(1) In accordance with Section 1210.4.1.(2) In accordance with NFPA 58, where the pressure ex-

ceeds 20 psi (138 kPa).(3) Designed to either accommodate liquid LP-Gas or

prevent LP-Gas vapor from condensing back into aliquid in buildings having systems designed to op-erate below -5°F (-21°C) or with butane or apropane–butane mix.

1210.6 Appliance Overpressure Protection. The maximumoperating pressure for piping systems serving appliances de-

signed to operate at 14 inches water column (3.5 kPa) inletpressure or less shall be 2 pounds-force per square inch gauge(psig) (14 kPa) unless an over-pressure protection device de-signed to limit pressure at the appliance to 2 psig (14 kPa) uponfailure of the line gas pressure regulator is installed.1210.7 Gas Pipe Turns. Changes in direction of gas pipeshall be made by the use of fittings, factory bends, or fieldbends. [NFPA 54:7.5]

1210.7.1 Metallic Pipe. Metallic pipe bends shall com-ply with the following:(1) Bends shall be made with bending equipment and

procedures intended for that purpose.(2) Bends shall be smooth and free from buckling,

cracks, or other evidence of mechanical damage.(3) The longitudinal weld of the pipe shall be near the

neutral axis of the bend.(4) The pipe shall not be bent through an arc of more

than 90 degrees (1.57 rad).(5) The inside radius of a bend shall be not less than six

times the outside diameter of the pipe. [NFPA54:7.5.1]

1210.7.2 Plastic Pipe. Plastic pipe bends shall complywith the following:(1) The pipe shall not be damaged, and the internal di-

ameter of the pipe shall not be effectively reduced.(2) Joints shall not be located in pipe bends.(3) The radius of the inner curve of such bends shall be

not less than 25 times the inside diameter of the pipe.(4) Where the piping manufacturer specifies the use of

special bending equipment or procedures, suchequipment or procedures shall be used. [NFPA54:7.5.2]

1210.7.3 Elbows. Factory-made welding elbows ortransverse segments cut therefrom shall have an arclength measured along the crotch of not less than 1 inch(25.4 mm) for pipe sizes 2 inches (50 mm) and larger.[NFPA 54:7.5.3]

1210.8 Drips and Sediment Traps.1210.8.1 Provide Drips Where Necessary. For otherthan dry gas conditions, a drip shall be provided at apoint in the line of pipe where condensate is capable ofcollecting. Where required by the Authority Having Ju-risdiction or the serving gas supplier, a drip shall also beprovided at the outlet of the meter. This drip shall be soinstalled as to constitute a trap wherein an accumulationof condensate will shut off the flow of gas before it willrun back into the meter. [NFPA 54:7.6.1]1210.8.2 Location of Drips. Drips shall be installed insuch locations that they will be readily accessible to per-mit cleaning or emptying. A drip shall not be locatedwhere the condensate is likely to freeze. [NFPA 54:7.6.2]1210.8.3 Sediment Traps. The installation of sedimenttraps shall comply with Section 1211.8. [NFPA 54-12:7.6.3]

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1210.9 Outlets. Outlets shall be located and installed in ac-cordance with the following requirements:(1) The outlet fittings or piping shall be securely fastened in

place.(2) Outlets shall not be located behind doors.(3) Outlets shall be located far enough from floors, walls,

patios, slabs, and ceilings to permit the use of wrencheswithout straining, bending, or damaging the piping.

(4) The unthreaded portion of gas piping outlets shall extendnot less than 1 inch (25.4 mm) through finished ceilingsor indoor or outdoor walls.

(5) The unthreaded portion of gas piping outlets shall extendnot less than 2 inches (51 mm) above the surface of floorsor outdoor patios or slabs.

(6) The provisions of Section 1210.9(4) and Section1210.9(5) shall not apply to listed quick-disconnect de-vices of the flush-mounted type or listed gas convenienceoutlets. Such devices shall be installed in accordancewith the manufacturer’s installation instructions. [NFPA54:7.7.1]1210.9.1 Cap Outlets. Each outlet, including a valve,shall be closed gastight with a threaded plug or cap im-mediately after installation and shall be left closed untilthe appliance is connected thereto. Where an appliance isdisconnected from an outlet, and the outlet is not to beused again immediately, it shall be closed gastight.Exceptions:(1) Laboratory equipment installed in accordance with

Section 1211.3.1 shall be permitted.(2) The use of a listed quick-disconnect device with in-

tegral shutoff or listed gas convenience outlet shallbe permitted. [NFPA 54:7.7.2.1]1210.9.1.1 Appliance Shutoff Valves. Applianceshutoff valves installed in fireplaces shall be re-moved and the piping capped gastight where thefireplace is used for solid-fuel burning. [NFPA54:7.7.2.2]

1210.10 Branch Pipe Connection. Where a branch outlet isplaced on a main supply line before it is known what size pipewill be connected to it, the outlet shall be of the same size asthe line that supplies it. [NFPA 54:7.8]1210.11 Manual Gas Shutoff Valves. An accessible gasshutoff valve shall be provided upstream of each gas pressureregulator. Where two gas pressure regulators are installed inseries in a single gas line, a manual valve shall not be requiredat the second regulator. [NFPA 54:7.9.1]

1210.11.1 Valves Controlling Multiple Systems. Maingas shutoff valves controlling several gas piping systemsshall be readily accessible for operation and installed soas to be protected from physical damage. They shall bemarked with a metal tag or other permanent means at-tached by the installing agency so that the gas piping sys-tems supplied through them are readily identified. [NFPA54:7.9.2.1]

1210.11.1.1 Shutoff Valves for Multiple HouseLines. In multiple-tenant buildings supplied througha master meter, or through one service regulatorwhere a meter is not provided, or where meters orservice regulators are not readily accessible from theequipment location, an individual shutoff valve foreach apartment or tenant line shall be provided at aconvenient point of general accessibility. In a com-mon system serving a number of individual build-ings, shutoff valves shall be installed at eachbuilding. [NFPA 54:7.9.2.2]

1210.11.2 Emergency Shutoff Valves. An exterior shut-off valve to permit turning off the gas supply to eachbuilding in an emergency shall be provided. The emer-gency shutoff valves shall be plainly marked as such andtheir locations posted as required by the Authority Hav-ing Jurisdiction. [NFPA 54:7.9.2.3]1210.11.3 Shutoff Valve for Laboratories. Each labora-tory space containing two or more gas outlets installed ontables, benches, or in hoods in educational, research, com-mercial and industrial occupancies shall have a singleshutoff valve through which such gas outlets are supplied.The shutoff valve shall be accessible and shall be locatedwithin the laboratory or located adjacent to the laboratory’segress door and shall be identified. [NFPA 54:7.9.2.4]

1210.12 Prohibited Devices. No device shall be placed insidethe gas piping or fittings that will reduce the cross-sectionalarea or otherwise obstruct the free flow of gas, except wherean allowance in the piping system design has been made forsuch a device and where approved by the Authority HavingJurisdiction. [NFPA 54:7.10]1210.13 Systems Containing Gas-Air Mixtures Outsidethe Flammable Range. Where gas-air mixing machines areemployed to produce mixtures above or below the flammablerange, they shall be provided with stops to prevent adjustmentof the mixture to within or approaching the flammable range.[NFPA 54:7.11]1210.14 Systems Containing Flammable Gas-Air Mix-tures. Systems containing flammable gas-air mixtures shallbe in accordance with NFPA 54.1210.15 Electrical Bonding and Grounding.

1210.15.1 Pipe and Tubing other than CSST. Eachaboveground portion of a gas piping system other thanCSST that is likely to become energized shall be electri-cally continuous and bonded to an effective ground-faultcurrent path. Gas piping, other than CSST, shall be con-sidered to be bonded where it is connected to appliancesthat are connected to the appliance grounding conductorof the circuit supplying that appliance. [NFPA 54:7.13.1]1210.15.2 Bonding of CSST Gas Piping. CSST gas pip-ing systems shall be bonded to the electrical servicegrounding electrode system. The bonding jumper shallconnect to a metallic pipe or fitting between the point ofdelivery and the first downstream CSST fitting. Thebonding jumper shall be not smaller than 6 AWG copperwire or equivalent. Gas piping systems that contain oneor more segments of CSST shall be bonded in accor-dance with this section. [NFPA 54-12:7.13.2]


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1210.15.3 Grounding Conductor or Electrode. Gaspiping shall not be used as a grounding conductor or elec-trode. [NFPA 54-12:7.13.3]1210.15.4 Lightning Protection System. Where a light-ning protection system is installed, the bonding of thegas piping system shall be in accordance with NFPA 780.[NFPA 54:7.13.4]

1210.16 Electrical Circuits. Electrical circuits shall not uti-lize gas piping or components as conductors.Exception: Low-voltage (50V or less) control circuits, igni-tion circuits, and electronic flame detection device circuitsshall be permitted to make use of piping or components as apart of an electric circuit. [NFPA 54:7.14]1210.17 Electrical Connections. Electrical connections be-tween wiring and electrically operated control devices in apiping system shall comply with the requirements of Cali-fornia Electrical Code.

1210.17.1 Safety Control. An essential safety controldepending on electric current as the operating mediumshall be of a type that will shut off (fail safe) the flow ofgas in the event of current failure. [NFPA 54:7.15.2]

1210.18 Earthquake-Actuated Gas Shutoff Valves. Earth-quake-actuated gas shutoff valves, certified by the State Archi-tect as conforming to California Referenced Standards Code(CRSC), Standard 12-12-1, shall be provided for buildingswhen such installation is required by local ordinance. Earth-quake-actuated gas shutoff valves which have not been certifiedby the State Architect shall be prohibited in buildings open tothe public under mandatory installation by local ordinance.

An earthquake-actuated gas shutoff valve is a valve forinstallation in a gas piping system and designed to automat-ically shut off the gas at the location of the valve in the eventof a seismic disturbance.

1211.0 Appliance Connections to Building Piping.1211.1 Connecting Gas Appliances. Appliances shall beconnected to the building piping in accordance with Section1211.5 through Section 1211.7 by one of the following [NFPA54:9.6.1]:(1) Rigid metallic pipe and fittings. [NFPA 54:9.6.1(1)](2) Semirigid metallic tubing and metallic fittings. Alu-

minum alloy tubing shall not be used in exterior loca-tions. [NFPA 54:9.6.1(2)]

(3) A listed connector installed in accordance with CSAZ21.24. The connector shall be installed in accordancewith the manufacturer’s installation instructions and shallbe in the same room as the appliance. One connectorshall be installed for each appliance. [NFPA 54:9.6.1(3)]

(4) CSST where installed in accordance with the manufac-turer’s installation instructions. [NFPA 54:9.6.1(5)]

(5) Listed nonmetallic gas hose connectors installed in ac-cordance with Section 1211.3. [NFPA 54:9.6.1(6)]

(6) Commercial cooking appliances that are moved forcleaning and sanitation purposes shall be installed in ac-cordance with the connector manufacturer’s installationinstructions using a listed appliance connector in accor-

dance with CSA Z21.69. The commercial cooking ap-pliance connector installation shall be configured in ac-cordance with the manufacturer’s installationinstructions. [NFPA 54:9.6.1.1]

(7) Movement of appliances with casters shall be limited bya restraining device installed in accordance with the con-nector and appliance manufacturer’s installation instruc-tions. [NFPA 54:9.6.1.2]

(8) In Section 1211.1(2), Section 1211.1(3), and Section1211.1(5), the connector or tubing shall be installed soas to be protected against physical and thermal damage.Aluminum alloy tubing and connectors shall be coatedto protect against external corrosion where they are incontact with masonry, plaster, insulation, or are subject torepeated wettings by such liquids as water (except rain-water), detergents, or sewage. [NFPA 54:9.6.1(7)]

1211.2 Suspended Low-Intensity Infrared Tube Heaters.Suspended low-intensity infrared tube heaters shall be con-nected to the building piping system with a connector listedfor the application in accordance with CSA Z21.24 and thefollowing requirements:(1) The connector shall be installed in accordance with the

tube heater installation instructions, and shall be in thesame room as the appliance.

(2) One connector shall be used per appliance. [NFPA54:9.6.1.3]

1211.3 Use of Nonmetallic Gas Hose Connectors. Listednonmetallic gas hose connectors shall be installed in accor-dance with the manufacturer’s installation instructions and inaccordance with Section 1211.3.1 and Section 1211.3.2.[NFPA 54:9.6.2]

1211.3.1 Indoor. Indoor gas hose connectors shall beused to connect laboratory, shop, and ironing equipmentrequiring mobility during operation. An appliance shut-off valve shall be installed where the connector is at-tached to the building piping. The connector shall be ofminimum length and shall not exceed 6 feet (1829 mm).The connector shall not be concealed and shall not ex-tend from one room to another or pass through wall par-titions, ceilings, or floors. [NFPA 54:9.6.2(1)]1211.3.2 Outdoor. Where outdoor gas hose connectorsare used to connect portable outdoor appliances, the con-nector shall be listed in accordance with CSA Z21.54.An appliance shutoff valve, a listed quick-disconnect de-vice, or a listed gas convenience outlet shall be installedwhere the connector is attached to the supply piping andin such a manner to prevent the accumulation of wateror foreign matter. This connection shall be made only inthe outdoor area where the appliance is to be used.[NFPA 54-12:9.6.2(2)]

The connector length shall not exceed 15 feet (4572mm).

1211.4 Connection of Portable and Mobile Industrial GasAppliances.

1211.4.1 Flexible Hose. Where portable industrial ap-pliances, or appliances requiring mobility or subject tovibration, are connected to the building gas piping sys-


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tem by the use of a flexible hose, the hose shall be ap-proved and safe for the conditions under which it is used.[NFPA 54:9.6.3.1]1211.4.2 Swivel Joints or Couplings. Where industrialappliances requiring mobility are connected to the rigidpiping by the use of swivel joints or couplings, the swiveljoints or couplings shall be approved for the service re-quired, and only the minimum number required shall beinstalled. [NFPA 54:9.6.3.2]1211.4.3 Metal Flexible Connectors. Where industrialappliances subject to vibration are connected to the build-ing piping system by the use of metal flexible connec-tors, the connectors shall be approved for the servicerequired. [NFPA 54:9.6.3.3]1211.4.4 Flexible Connectors. Where flexible connec-tions are used, they shall be of the minimum practicallength and shall not extend from one room to another orpass through walls, partitions, ceilings, or floors. Flexi-ble connections shall not be used in a concealed location.They shall be protected against physical or thermal dam-age and shall be provided with gas shutoff valves in read-ily accessible locations in rigid piping upstream from theflexible connections. [NFPA 54:9.6.3.4]

1211.5 Appliance Shutoff Valves and Connections. Appli-ances connected to a piping system shall have an accessible,approved manual shutoff valve with a nondisplaceable valvemember, or a listed gas convenience outlet installed within 6feet (1829 mm) of the appliance it serves. Where a connectoris used, the valve shall be installed upstream of the connector.A union or flanged connection shall be provided downstreamfrom this valve to permit removal of controls. Shutoff valvesserving decorative gas appliances shall be permitted to be in-stalled in fireplaces where listed for such use. [NFPA 54:9.6.4]Exceptions:(1) Shutoff valves shall be permitted to be accessibly located

inside or under an appliance where such appliance is re-moved without removal of the shutoff valve.

(2) Shutoff valves shall be permitted to be accessibly locatedinside wall heaters and wall furnaces listed for recessedinstallation where necessary maintenance is performedwithout removal of the shutoff valve.

1211.6 Quick-Disconnect Devices. Quick-disconnect devicesused to connect appliances to the building piping shall belisted. Where installed indoors, an approved manual shutoffvalve with a non-displaceable valve member shall be installedupstream of the quick-disconnect device. [NFPA 54:9.6.5]1211.7 Gas Convenience Outlets. Appliances shall be per-mitted to be connected to the building piping by means of alisted gas convenience outlet, in conjunction with a listed ap-pliance connector, installed in accordance with the manufac-turer’s installation instructions.

Gas convenience outlets shall be listed in accordancewith CSA Z21.90 and installed in accordance with the man-ufacturer’s installation instructions. [NFPA 54:9.6.6]1211.8 Sediment Trap. Where a sediment trap is not incor-porated as a part of the appliance, a sediment trap shall be in-stalled downstream of the appliance shutoff valve as close to

the inlet of the appliance as practical at the time of applianceinstallation. The sediment trap shall be either a tee fitting witha capped nipple in the bottom outlet, as illustrated in Figure1211.8, or other device recognized as an effective sedimenttrap. Illuminating appliances, ranges, clothes dryers, decora-tive appliances for installation in vented fireplaces, gas fire-places, and outdoor grills shall not be required to be soequipped. [NFPA 54:9.6.7]

1211.9 Installation of Piping. Piping shall be installed in amanner not to interfere with inspection, maintenance, or serv-icing of the appliance. [NFPA 54:9.6.8]

1212.0 Liquefied Petroleum Gas Facilities and Piping.1212.1 General. Liquefied petroleum gas facilities shall com-ply with NFPA 58.

1213.0 Pressure Testing and Inspection.1213.1 Piping Installations. Prior to acceptance and initialoperation, piping installations shall be visually inspected andpressure-tested to determine that the materials, design, fabri-cation, and installation practices are in accordance with the re-quirements of this code. [NFPA 54-12:8.1.1.1]

1213.1.1 Inspection Requirements. Inspection shall con-sist of visual examination during or after manufacture, fab-rication, assembly, or pressure tests. [NFPA 54-12:8.1.1.2]1213.1.2 Repairs and Additions. Where repairs or ad-ditions are made following the pressure test, the affectedpiping shall be tested. Minor repairs and additions arenot required to be pressure-tested provided that the workis inspected and connections are tested with a noncorro-sive leak-detecting fluid or other leak-detecting methodsapproved by the Authority Having Jurisdiction. [NFPA54:8.1.1.3]1213.1.3 New Branches. Where new branches are in-stalled from the point of delivery to new appliances, the

For SI units: 1 inch = 25.4 mm

FIGURE 1211.8METHOD OF INSTALLING A TEE FITTING SEDIMENT TRAP[NFPA 54: FIGURE 9.6.7]


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newly installed branches shall be required to be pressure-tested. Connections between the new piping and the ex-isting piping shall be tested with a noncorrosiveleak-detecting fluid or approved leak-detecting methods.[NFPA 54:8.1.1.4]1213.1.4 Piping System. A piping system shall be testedas a complete unit or in sections. Under no circumstancesshall a valve in a line be used as a bulkhead between gasin one section of the piping system and test medium in anadjacent section, unless two valves are installed in serieswith a valved "telltale" located between these valves. Avalve shall not be subjected to the test pressure unless itis determined that the valve, including the valve-closingmechanism, is designed to safely withstand the pressure.[NFPA 54:8.1.1.5]1213.1.5 Regulators and Valves. Regulator and valveassemblies fabricated independently of the piping sys-tem in which they are to be installed shall be permitted tobe tested with inert gas or air at the time of fabrication.[NFPA 54:8.1.1.6]1213.1.6 Test Medium. The test medium shall be air, ni-trogen, carbon dioxide, or an inert gas. OXYGENSHALL NEVER BE USED. [NFPA 54:8.1.2]

1213.2 Test Preparation.1213.2.1 Pipe Joints. Pipe joints, including welds, shallbe left exposed for examination during the test.Exception: Covered or concealed pipe end joints thathave been previously tested in accordance with this code.[NFPA 54:8.1.3.1]1213.2.2 Expansion Joints. Expansion joints shall beprovided with temporary restraints, where required, forthe additional thrust load under test. [NFPA 54:8.1.3.2]1213.2.3 Appliances and Equipment. Appliances andequipment that are not to be included in the test shall beeither disconnected from the piping or isolated by blanks,blind flanges, or caps. Flanged joints at which blinds areinserted to blank off other equipment during the test shallnot be required to be tested. [NFPA 54:8.1.3.3]1213.2.4 Designed for (less than) Operating Pressures.Where the piping system is connected to appliances,equipment, or equipment components designed for op-erating pressures of less than the test pressure, such ap-pliances, equipment, or equipment components shall beisolated from the piping system by disconnecting themand capping the outlets. [NFPA 54:8.1.3.4]1213.2.5 Designed for (equal to or more than) Oper-ating Pressures. Where the piping system is connectedto appliances or equipment designed for operating pres-sures equal to or greater than the test pressure, such ap-pliances and equipment shall be isolated from the pipingsystem by closing the individual appliance or equipmentshutoff valve(s). [NFPA 54:8.1.3.5]1213.2.6 Safety. Testing of piping systems shall be per-formed in a manner that protects the safety of employeesand the public during the test. [NFPA 54-12:8.1.3.6]

1213.3 Test Pressure. This inspection shall include an air,CO2, or nitrogen pressure test, at which time the gas pipingshall stand a pressure of not less than 10 psi (69 kPa) gaugepressure. Test pressures shall be held for a length of time sat-isfactory to the Authority Having Jurisdiction, but in no caseless than 15 minutes with no perceptible drop in pressure. Forwelded piping, and for piping carrying gas at pressures in ex-cess of 14 inches water column pressure (3.5 kPa), the testpressure shall be not less than 60 psi (414 kPa) and shall becontinued for a length of time satisfactory to the AuthorityHaving Jurisdiction, but in no case for less than 30 minutes.These tests shall be made using air, CO2, or nitrogen pressureand shall be made in the presence of the Authority Having Ju-risdiction. Necessary apparatus for conducting tests shall befurnished by the permit holder. Test gauges used in conduct-ing tests shall be in accordance with Section 318.0.1213.4 Detection of Leaks and Defects. The piping systemshall withstand the test pressure specified without showingevidence of leakage or other defects. Reduction of test pres-sures as indicated by pressure gauges shall be deemed to in-dicate the presence of a leak unless such reduction is readilyattributed to some other cause. [NFPA 54:8.1.5.1]

1213.4.1 Detecting Leaks. The leakage shall be locatedby means of an approved gas detector, a noncorrosiveleak detection fluid, or other approved leak detectionmethods. Matches, candles, open flames, or other meth-ods that provide a source of ignition shall not be used.[NFPA 54:8.1.5.2]1213.4.2 Repair or Replace.Where leakage or other de-fects are located, the affected portion of the piping sys-tem shall be repaired or replaced and retested. [NFPA54-12:8.1.5.3]

1213.5 Piping System Leak Test. Leak checks using fuel gasshall be permitted in piping systems that have been pressure-tested in accordance with Section 1213.0. [NFPA 54:8.2.1]

1213.5.1 Turning Gas On. During the process of turn-ing gas on into a system of new gas piping, the entire sys-tem shall be inspected to determine that there are no openfittings or ends and that valves at unused outlets areclosed and plugged or capped. [NFPA 54:8.2.2]1213.5.2 Leak Check. Immediately after the gas isturned on into a new system or into a system that hasbeen initially restored after an interruption of service, thepiping system shall be checked for leakage. Where leak-age is indicated, the gas supply shall be shut off until thenecessary repairs have been made. [NFPA 54:8.2.3]1213.5.3 Placing Appliances and Equipment in Oper-ation. Appliances and equipment shall not be placed inoperation until after the piping system has been checkedin accordance with Section 1213.5.2; connections to theappliance are checked for leakage; and purged in accor-dance with Section 1213.6. [NFPA 54-12:8.2.4]

1213.6 Purging Requirements. The purging of piping shallbe in accordance with Section 1213.6.1 through Section1213.6.3. [NFPA 54-12:8.3]

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1213.6.1 Piping Systems Required to be Purged Out-doors. The purging of piping systems shall be in accor-dance with the provisions of Section 1213.6.1.1 throughSection 1213.6.1.4 where the piping system meets eitherof the following:(1) The design operating gas pressure exceeds 2 psig

(14 kPa).(2) The piping being purged contains one or more sec-

tions of pipe or tubing meeting the size and lengthcriteria of Table 1213.6.1. [NFPA 54-12:8.3.1]

1213.6.1.1 Removal from Service. Where existinggas piping is opened, the section that is opened shallbe isolated from the gas supply and the line pressurevented in accordance with Section 1213.6.1.3.Where gas piping meeting the criteria of Table1213.6.1 is removed from service, the residual fuelgas in the piping shall be displaced with an inert gas.[NFPA 54-12:8.3.1.1]1213.6.1.2 Placing in Operation. Where gas pip-ing containing air and meeting the criteria of Table1213.6.1 is placed in operation, the air in the pipingshall first be displaced with an inert gas. The inertgas shall then be displaced with fuel gas in accor-dance with Section 1213.6.1.3. [NFPA 54-12:8.3.1.2]1213.6.1.3 Outdoor Discharge of Purged Gases.The open end of a piping system being pressurevented or purged shall discharge directly to an out-door location. Purging operations shall comply withthe following requirements:(1) The point of discharge shall be controlled with

a shutoff valve.(2) The point of discharge shall be located not less

than 10 feet (3048 mm) from sources of igni-tion, not less than 10 feet (3048 mm) frombuilding openings, and not less than 25 feet(7620 mm) from mechanical air intake open-ings.

(3) During discharge, the open point of dischargeshall be continuously attended and monitoredwith a combustible gas indicator that is in ac-cordance with Section 1213.6.1.4.

(4) Purging operations introducing fuel gas shall bestopped where 90 percent fuel gas by volume isdetected within the pipe.

(5) Persons not involved in the purging operationsshall be evacuated from areas within 10 feet(3048 mm) of the point of discharge. [NFPA 54-12:8.3.1.3]

1213.6.1.4 Combustible Gas Indicator. Com-bustible gas indicators shall be listed and shall becalibrated in accordance with the manufacturer’s in-structions. Combustible gas indicators shall numer-ically display a volume scale from 0 percent to 100percent in 1 percent or smaller increments. [NFPA54-12:8.3.1.4]

1213.6.2 Piping Systems Allowed to be Purged In-doors or Outdoors. The purging of piping systems shallbe in accordance with the provisions of Section1213.6.2.1 where the piping system meets both of thefollowing:(1) The design operating pressure is 2 psig (14 kPa) or

less.(2) The piping being purged is constructed entirely from

pipe or tubing not meeting the size and length crite-ria of Table 1213.6.1. [NFPA 54-12:8.3.2]1213.6.2.1 Purging Procedure. The piping systemshall be purged in accordance with one or more ofthe following:(1) The piping shall be purged with fuel gas and

shall discharge to the outdoors.(2) The piping shall be purged with fuel gas and

shall discharge to the indoors or outdoorsthrough an appliance burner not located in acombustion chamber. Such burner shall be pro-vided with a continuous source of ignition.

(3) The piping shall be purged with fuel gas andshall discharge to the indoors or outdoorsthrough a burner that has a continuous sourceof ignition and that is designed for such pur-pose.

(4) The piping shall be purged with fuel gas that isdischarge to the indoors or outdoors, and thepoint of discharge shall be monitored with alisted combustible gas detector in accordancewith Section 1213.6.2.2. Purging shall bestopped where fuel gas is detected.

(5) The piping shall be purged by the gas supplierin accordance with written procedures. [NFPA54-12:8.3.2.1]

1213.6.2.2 Combustible Gas Detector. Combustiblegas detectors shall be listed and shall be calibrated ortested in accordance with the manufacturer’s instruc-tions. Combustible gas detectors shall be capable ofindicating the presence of fuel gas. [NFPA 54-12:8.3.2.2]

1213.6.3 Purging Appliances and Equipment. Afterthe piping system has been placed in operation, appli-

NOMINAL PIPINGSIZE (inches)

LENGTH OF PIPING (feet)

≥ 21⁄2 < 3 > 50≥ 3 < 4 > 30≥ 4 < 6 > 15≥ 6 < 8 > 10

≥ 8 Any length

TABLE 1213.6.1SIZE AND LENGTH OF PIPING[NFPA 54-12: TABLE 8.3.1]*

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm* CSST EHD size of 62 is equivalent to nominal 2 inches (50 mm) pipe or

tubing size.


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ances and equipment shall be purged before being placedinto operation. [NFPA 54-12:8.3.3]

1214.0 Interconnections Between Gas Piping Systems.1214.1 Interconnections Supplying Separate Users. Wheretwo or more meters, or two or more service regulators wheremeters are not provided, are located on the same premises andsupply separate users, the gas piping systems shall not be in-terconnected on the outlet side of the meters or service regu-lators. [NFPA 54:5.3.1]1214.2 Interconnections for Standby Fuels. Where supple-mentary gas for standby use is connected downstream from ameter or a service regulator where a meter is not provided, adevice to prevent backflow shall be installed. A three-wayvalve installed to admit the standby supply and at the sametime shut off the regular supply shall be permitted to be usedfor this purpose. [NFPA 54:5.3.2]

1215.0 Required Gas Supply.1215.1 General. The following regulations, shall complywith this section and Section 1216.0, shall be the standard forthe installation of gas piping. Natural gas regulations and ta-bles are based on the use of gas having a specific gravity of0.60, supplied at 6 to 8 inches water column (1.5 kPa to 1.9kPa) pressure at the outlet of the meter or regulator. For undi-luted liquefied petroleum gas, gas piping shall be permitted tobe sized at 11 inches water column (2.7 kPa) pressure at theoutlet of the meter or regulator and specific gravity of 1.50.Where gas of a different specific gravity is to be delivered, thespecific gravity conversion factors provided by the servinggas supplier shall be used in sizing piping systems from thepipe sizing tables in this chapter.1215.2 Volume. The hourly volume of gas required at eachpiping outlet shall be taken as not less than the maximumhourly rating as specified by the manufacturer of the appli-ance or appliances to be connected to each such outlet.1215.3 Gas Appliances. Where the gas appliances to be in-stalled have not been definitely specified, Table 1208.4.1 shallbe permitted to be used as a reference to estimate require-ments of typical appliances.

To obtain the cubic feet per hour (m3/h) of gas required,divide the input of the appliances by the average Btu (kW•h)heating value per cubic foot (m3) of the gas. The average Btu(kW•h) per cubic foot (m3) of the gas in the area of the in-stallation shall be permitted to be obtained from the servinggas supplier.1215.4 Size of Piping Outlets. The size of the supply pipingoutlet for a gas appliance shall be not less than 1⁄2 of an inch(15 mm).

The size of a piping outlet for a mobile home shall be notless than 3⁄4 of an inch (20 mm).

1216.0 Required Gas Piping Size.1216.1 Pipe Sizing Methods. Where the pipe size is to bedetermined using a method in Section 1216.1.1 through Sec-

tion 1216.1.3, the diameter of each pipe segment shall be ob-tained from the pipe sizing tables in Section 1216.2 or fromthe sizing equations in Section 1216.3. [NFPA 54:6.1]

1216.1.1 Longest Length Method. The pipe size of eachsection of gas piping shall be determined using thelongest length of piping from the point of delivery to themost remote outlet and the load of the section (see cal-culation example in Figure 1216.1.1). [NFPA 54:6.1.1]1216.1.2 Branch Length Method. Pipe shall be sizedas follows:(1) The pipe size of each section of the longest pipe run

from the point of delivery to the most remote outletshall be determined using the longest run of pipingand the load of the section.

(2) The pipe size of each section of branch piping notpreviously sized shall be determined using thelength of piping from the point of delivery to themost remote outlet in each branch and the load ofthe section. [NFPA 54:6.1.2]

1216.1.3 Hybrid Pressure. The pipe size for each sec-tion of higher pressure gas piping shall be determinedusing the longest length of piping from the point of de-livery to the most remote line pressure regulator. Thepipe size from the line pressure regulator to each outletshall be determined using the length of piping from theregulator to the most remote outlet served by the regula-tor. [NFPA 54:6.1.3]

1216.2 Tables for Sizing Gas Piping Systems. Table1216.2(1) through Table 1216.2(36) shall be used to size gaspiping in conjunction with one of the methods described inSection 1216.1.1 through Section 1216.1.3. [NFPA 54:6.2]1216.3 Sizing Equations. The inside diameter of smooth-wall pipe or tubing shall be determined by Equation1216.3(1), Equation 1216.3(2), Table 1216.3, and using theequivalent pipe length determined by Section 1216.1.1through Section 1216.1.3. [NFPA 54:6.4]

EQUATION 1216.3(1)LOW-PRESSURE GAS FORMULA (LESS THAN 1.5 psi)

[NFPA 54:6.4.1]

Where:D = inside diameter of pipe, inchesQ = input rate appliance(s), cubic feet per hour at 60˚F and

30 inch mercury columnL = equivalent length of pipe, feetΔH = pressure drop, inches water columnCr = in accordance with Table 1216.3

D = Q0.381

19.17 ( ΔH )0.206

Cr x L


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EQUATION 1216.3(2)HIGH-PRESSURE GAS FORMULA (1.5 psi AND ABOVE)

[NFPA 54:6.4.2]

Where:D = inside diameter of pipe, inchesQ = input rate appliance(s), cubic feet per hour at 60°F and

30 inch mercury columnP1 = upstream pressure, psia (P1 + 14.7)P2 = downstream pressure, psia (P2 + 14.7)L = equivalent length of pipe, feetCr = in accordance with Table 1216.3Y = in accordance with Table 1216.3

For SI units: 1 cubic foot = 0.0283 m3, 1000 British thermal units per hour =0.293 kW, 1 inch = 25 mm, 1 foot = 304.8 mm, 1 pound-force per squareinch = 6.8947 kPa, °C = (°F-32)/1.8, 1 inch mercury column = 3.39 kPa, 1inch water column = 0.249 kPa

1216.4 Sizing of Piping Sections. To determine the size ofeach section of pipe in a system within the range of Table1216.2(1) through Table 1216.2(36), proceed as follows:(1) Measure the length of the pipe from the gas meter loca-

tion to the most remote outlet on the system.(2) Select the length in feet column and row showing the dis-

tance, or the next longer distance where the table doesnot give the exact length.

(3) Starting at the most remote outlet, find in the row just se-lected the gas demand for that outlet. Where the exactfigure of demand is not shown, choose the next largerfigure in the row.

(4) At the top of this column will be found the correct sizeof pipe.

(5) Using this same row, proceed in a similar manner foreach section of pipe serving this outlet. For each sectionof pipe, determine the total gas demand supplied by thatsection. Where gas piping sections serve both heatingand cooling appliances and the installation prevents bothunits from operating simultaneously, the larger of the twodemand loads needs to be used in sizing these sections.

(6) Size each section of branch piping not previously sizedby measuring the distance from the gas meter location tothe most remote outlet in that branch and follow the pro-cedures of steps 2, 3, 4, and 5 above. Size branch pipingin the order of their distance from the meter location, be-ginning with the most distant outlet not previously sized.

1216.5 Engineering Methods. For conditions other thanthose covered by Section 1216.1, such as longer runs orgreater gas demands, the size of each gas piping system shallbe determined by standard engineering methods acceptableto the Authority Having Jurisdiction, and each such systemshall be so designed that the total pressure drop between themeter or other point of supply and an outlet where full de-mand is being supplied to all outlets, shall be in accordancewith the requirements of Section 1208.4.1216.6 Variable Gas Pressure. Where the gas pressure ex-ceeds 14 inches (3.5 kPa) or less than 6 inches (1.5 kPa) ofwater column, or where diversity demand factors are used,the design, pipe, sizing, materials, location, and use of suchsystems first shall be approved by the Authority Having Ju-risdiction. Piping systems designed for pressures exceedingthe serving gas supplier’s standard delivery pressure shallhave prior verification from the gas supplier of the availabil-ity of the design pressure.

D = Q0.381

18.93 [ (P12 – P2

2) • Y ]0.206

Cr x L

GASFORMULA FACTORSCr Y

Natural Gas 0.6094 0.9992Undiluted Propane 1.2462 0.9910

TABLE 1216.3Cr AND Y FOR NATURAL GAS AND UNDILUTED PROPANE

AT STANDARD CONDITIONS[NFPA 54: TABLE 6.4.2]


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FIGURE 1216.1.1 EXAMPLE ILLUSTRATING USE OF TABLES 1208.4.1 AND 1216.2(1)Problem: Determine the required pipe size of each section and outlet of the piping system shown in Figure 1216.1.1. Gas to beused has a specific gravity of 0.60 and 1100 British thermal units (Btu) per cubic foot (0.0114 kW•h/L), delivered at 8 inch watercolumn (1.9 kPa) pressure.

Solution:(1) Maximum gas demand of Outlet A —

32 cubic feet per hour (0.91 m3/h) (from Table 1208.4.1).Maximum gas demand of Outlet B —

3 cubic feet per hour (0.08 m3/h) (from Table 1208.4.1).Maximum gas demand of Outlet C —

59 cubic feet per hour (1.67 m3/h) (from Table 1208.4.1).Maximum gas demand of Outlet D —

136 cubic feet per hour (3.85 m3/h) [150 000 Btu/hour (44 kW) divided by 1100 Btu per cubic foot (0.0114kW•h/L)].

(2) The length of pipe from the gas meter to the most remote outlet (Outlet A) is 60 feet (18 288 mm).(3) Using the length in feet column row marked 60 feet (18 288 mm) in Table 1216.2(1):

Outlet A, supplying 32 cubic feet per hour (0.91 m3/h), requires 1⁄2 of an inch (15 mm) pipe. Section 1, supplying Outlets A and B, or 35 cubic feet per hour (0.99 m3/h) requires 1⁄2 of an inch (15 mm) pipe.Section 2, supplying Outlets A, B, and C, or 94 cubic feet per hour (2.66 m3/h) requires 3⁄4 of an inch (20 mm) pipe.Section 3, supplying Outlets A, B, C, and D, or 230 cubic feet per hour (6.51 m3/h), requires 1 inch (25 mm) pipe.

(4) Using the column marked 60 feet (18 288 mm) in Table 1216.2(1) [no column for actual length of 55 feet (16 764 mm)]:Outlet B supplying 3 cubic feet per hour (0.08 m3/h), requires 1⁄2 of an inch (15 mm) pipe.Outlet C, supplying 59 cubic feet per hour (1.67 m3/h), requires 1⁄2 of an inch (15 mm) pipe.

(5) Using the column marked 60 feet (18 288 mm) in Table 1216.2(1):Outlet D, supplying 136 cubic feet per hour (3.85 m3/h), requires 3⁄4 of an inch (20 mm) pipe.

For SI units: 1 foot = 304.8 mm, 1 gallon = 3.785 L, 1000 British thermal units per hour = 0.293 kW, 1 cubic foot per hour = 0.0283 m3/h

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TABLE 1216.2(1)SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.2(b)]1, 2

GAS: NATURALINLET PRESSURE: LESS THAN 2 psiPRESSURE DROP: 0.5 in. w.c.SPECIFIC GRAVITY: 0.60

PIPE SIZE (inch)NOMINAL: 1⁄2 3⁄4 1 11⁄4 11⁄2 2 21⁄2 3 4 5 6 8 10 12

ACTUAL ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026 5.047 6.065 7.981 10.020 11.938LENGTH(feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

1020304050

172118958172

360247199170151

678466374320284

1390957768657583

209014301150985873

40202760222019001680

64004400353030202680

11 3007780625053504740

23 10015 90012 70010 9009660

41 80028 70023 00019 70017 500

67 60046 50037 30031 90028 300

139 00095 50076 70065 60058 200

252 000173 000139 000119 000106 000

399 000275 000220 000189 000167 000

60708090100

6560565250

137126117110104

257237220207195

528486452424400

791728677635600

15201400130012201160

24302230208019501840

42903950367034503260

87608050749070306640

15 80014 60013 60012 70012 000

25 60023 60022 00020 60019 500

52 70048 50045 10042 30040 000

95 70088 10081 90076 90072 600

152 000139 000130 000122 000115 000

125150175200250

4440373430

9283777163

173157144134119

355322296275244

532482443412366

1020928854794704

16301480136012701120

28902610241022401980

58905330491045604050

10 6009650888082607320

17 20015 60014 40013 40011 900

35 40032 10029 50027 50024 300

64 30058 30053 60049 90044 200

102 00092 30084 90079 00070 000

300350400450500

2725232221

5753494643

10899928682

221203189177168

331305283266251

638587546512484

1020935870816771

18001650154014401360

36703370314029402780

66306100568053305030

10 7009880919086208150

22 10020 30018 90017 70016 700

40 10036 90034 30032 20030 400

63 40058 40054 30050 90048 100

550600650700750

2019181717

4139383635

7874716866

159152145140135

239228218209202

459438420403389

732699669643619

12901240118011401090

26402520241023202230

47804560436041904040

77407380707067906540

15 90015 20014 50014 00013 400

28 90027 50026 40025 30024 400

45 70043 60041 80040 10038 600

8008509009501000

1616151514

3433323130

6361595856

130126122118115

195189183178173

375363352342333

598579561545530

10601020992963937

21602090202019601910

39003780366035503460

63206110593057605600

13 00012 60012 20011 80011 500

23 60022 80022 10021 50020 900

37 30036 10035 00034 00033 100

11001200130014001500

1413121211

2827262524

5351494745

1091041009693

164156150144139

316301289277267

503480460442426

890849813781752

18101730166015901530

32803130300028802780

53205070486046704500

10 90010 400998095909240

19 80018 90018 10017 40016 800

31 40030 00028 70027 60026 600

16001700180019002000

11111010NA

2322222120

4442414039

8986848179

134130126122119

258250242235229

411398386375364

727703682662644

14801430139013501310

26802590252024402380

43404200407039603850

89208630837081307910

16 20015 70015 20014 80014 400

25 60024 80024 10023 40022 700

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPaNotes:1 Table entries are rounded to 3 significant digits.2 NA means a flow of less than 10 ft3/h (0.283 m3/h).

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(2)SCHEDULE 40 METALLIC PIPE [NFPA 54-12: TABLE 6.2(c)]*

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa* Table entries are rounded to 3 significant digits.


INTENDED USE: INITIAL SUPPLY PRESSURE OF 8.0 IN. W.C. OR GREATERPIPE SIZE (inch)

NOMINAL: 1⁄2 3⁄4 1 1¼ 11⁄2 2 21⁄2 3 4ACTUAL ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026

LENGTH (feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

10 454 949 1787 3669 5497 10 588 16 875 29 832 43 67820 312 652 1228 2522 3778 7277 11 598 20 503 30 02030 250 524 986 2025 3034 5844 9314 16 465 24 10740 214 448 844 1733 2597 5001 7971 14 092 20 63250 190 397 748 1536 2302 4433 7065 12 489 18 28660 172 360 678 1392 2085 4016 6401 11 316 16 56970 158 331 624 1280 1919 3695 5889 10 411 15 24380 147 308 580 1191 1785 3437 5479 9685 14 18190 138 289 544 1118 1675 3225 5140 9087 13 305100 131 273 514 1056 1582 3046 4856 8584 12 568125 116 242 456 936 1402 2700 4303 7608 11 139150 105 219 413 848 1270 2446 3899 6893 10 093175 96 202 380 780 1169 2251 3587 6342 9285200 90 188 353 726 1087 2094 3337 5900 8638250 80 166 313 643 964 1856 2958 5229 7656300 72 151 284 583 873 1681 2680 4738 6937350 66 139 261 536 803 1547 2465 4359 6382400 62 129 243 499 747 1439 2294 4055 5937450 58 121 228 468 701 1350 2152 3804 5570500 55 114 215 442 662 1275 2033 3594 5262550 52 109 204 420 629 1211 1931 3413 4997600 50 104 195 400 600 1156 1842 3256 4767650 47 99 187 384 575 1107 1764 3118 4565700 46 95 179 368 552 1063 1695 2996 4386750 44 92 173 355 532 1024 1632 2886 4225800 42 89 167 343 514 989 1576 2787 4080850 41 86 162 332 497 957 1526 2697 3949900 40 83 157 322 482 928 1479 2615 3828950 39 81 152 312 468 901 1436 2539 37181000 38 79 148 304 455 877 1397 2470 36161100 36 75 141 289 432 833 1327 2346 34351200 34 71 134 275 412 794 1266 2238 32771300 33 68 128 264 395 761 1212 2143 31381400 31 65 123 253 379 731 1165 2059 30141500 30 63 119 244 366 704 1122 1983 29041600 29 61 115 236 353 680 1083 1915 28041700 28 59 111 228 342 658 1048 1854 27141800 27 57 108 221 331 638 1017 1797 26311900 27 56 105 215 322 619 987 1745 25552000 26 54 102 209 313 602 960 1698 2485

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(3)SCHEDULE 40 METALLIC PIPE [NFPA 54-12: TABLE 6.2(d)]*


INTENDED USE: INITIAL SUPPLY PRESSURE OF 11.0 IN. W.C. OR GREATERPIPE SIZE (inch)

NOMINAL: 1⁄2 3⁄4 1 11⁄4 11⁄2 2 21⁄2 3 4ACTUAL ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026LENGTH(feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

10 660 1380 2600 5338 7999 15 405 24 553 43 405 63 55120 454 949 1787 3669 5497 10 588 16 875 29 832 43 67830 364 762 1435 2946 4415 8502 13 551 23 956 35 07540 312 652 1228 2522 3778 7277 11 598 20 503 30 02050 276 578 1089 2235 3349 6449 10 279 18 172 26 60660 250 524 986 2025 3034 5844 9314 16 465 24 10770 230 482 907 1863 2791 5376 8568 15 147 22 17880 214 448 844 1733 2597 5001 7971 14 092 20 63290 201 420 792 1626 2437 4693 7479 13 222 19 359100 190 397 748 1536 2302 4433 7065 12 489 18 286125 168 352 663 1361 2040 3928 6261 11 069 16 207150 153 319 601 1234 1848 3559 5673 10 029 14 684175 140 293 553 1135 1700 3275 5219 9227 13 509200 131 273 514 1056 1582 3046 4856 8584 12 568250 116 242 456 936 1402 2700 4303 7608 11 139300 105 219 413 848 1270 2446 3899 6893 10 093350 96 202 380 780 1169 2251 3587 6342 9285400 90 188 353 726 1087 2094 3337 5900 8638450 84 176 332 681 1020 1965 3131 5535 8105500 80 166 313 643 964 1856 2958 5229 7656550 76 158 297 611 915 1762 2809 4966 7271600 72 151 284 583 873 1681 2680 4738 6937650 69 144 272 558 836 1610 2566 4537 6643700 66 139 261 536 803 1547 2465 4359 6382750 64 134 252 516 774 1490 2375 4199 6148800 62 129 243 499 747 1439 2294 4055 5937850 60 125 235 483 723 1393 2220 3924 5745900 58 121 228 468 701 1350 2152 3804 5570950 56 118 221 454 681 1311 2090 3695 54101000 55 114 215 442 662 1275 2033 3594 52621100 52 109 204 420 629 1211 1931 3413 49971200 50 104 195 400 600 1156 1842 3256 47671300 47 99 187 384 575 1107 1764 3118 45651400 46 95 179 368 552 1063 1695 2996 43861500 44 92 173 355 532 1024 1632 2886 42251600 42 89 167 343 514 989 1576 2787 40801700 41 86 162 332 497 957 1526 2697 39491800 40 83 157 322 482 928 1479 2615 38281900 39 81 152 312 468 901 1436 2539 37182000 38 79 148 304 455 877 1397 2470 3616


READ ONLY


FUEL GAS PIPING

TABLE 1216.2(4)SCHEDULE 40 METALLIC PIPE [NFPA 54-12: TABLE 6.2(e)]*

GAS: NATURALINLET PRESSURE: 2.0 psiPRESSURE DROP: 1.0 psiSPECIFIC GRAVITY: 0.60

PIPE SIZE (inch)NOMINAL: 1⁄2 3⁄4 1 11⁄4 11⁄2 2 21⁄2 3 4ACTUAL ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026LENGTH(feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

1020304050

15101070869753673

30402150176015201360

55603930321027802490

11 4008070659057105110

17 10012 100988085507650

32 90023 30019 00016 50014 700

52 50037 10030 30026 30023 500

92 80065 60053 60046 40041 500

189 000134 000109 00094 70084 700

60708090100

615569532502462

1240115010801010934

22702100197018501710

46604320404038103510

69806470605057005260

13 50012 50011 70011 00010 100

21 40019 90018 60017 50016 100

37 90035 10032 80030 90028 500

77 30071 60067 00063 10058 200

125150175200250

414372344318279

836751695642583

15301370127011701040

31402820260124102140

47004220391036103210

90608130753069606180

14 40013 00012 00011 1009850

25 50022 90021 20019 60017 400

52 10046 70043 30040 00035 500

300350400450500

253232216203192

528486452424401

945869809759717

19401790166015601470

29102670249023302210

56005150479045004250

89208210764071706770

15 80014 50013 50012 70012 000

32 20029 60027 50025 80024 400

550600650700750

182174166160154

381363348334322

681650622598576

14001330128012301180

20902000191018401770

40303850368035403410

64306130587056405440

11 40010 80010 40099709610

23 20022 10021 20020 30019 600

8008509009501000

149144139135132

311301292283275

556538522507493

11401100107010401010

17101650160015601520

32903190309030002920

52505080493047804650

92808980871084608220

18 90018 30017 80017 20016 800

11001200130014001500

125119114110106

262250239230221

468446427411396

960917878843812

14401370132012601220

27702640253024302340

44204220404038803740

78107450714068606600

15 90015 20014 60014 00013 500

16001700180019002000

10299969391

214207200195189

382370358348339

784759736715695

11801140110010701040

22602190212020602010

36103490339032903200

63806170598058105650

13 00012 60012 20011 90011 500

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa* Table entries are rounded to 3 significant digits.

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(5)SCHEDULE 40 METALLIC PIPE [NFPA 54-12: TABLE 6.2(f)]*



1020304050

2350162013001110985

49203380272023202060

92706370511043803880

19 00013 10010 50089907970

28 50019 60015 70013 50011 900

54 90037 70030 30025 90023 000

87 50060 10048 30041 30036 600

155 000106 00085 40073 10064 800

316 000217 000174 000149 000132 000

60708090100

892821764717677

18701720160015001420

35203230301028202670

72206640618058005470

10 8009950926086808200

20 80019 20017 80016 70015 800

33 20030 50028 40026 70025 200

58 70054 00050 20047 10044 500

120 000110 000102 00096 10090 800

125150175200250

600544500465412

125011401050973862

23602140197018301620

48504400404037603330

72706590606056405000

14 00012 70011 70010 9009620

22 30020 20018 60017 30015 300

39 50035 70032 90030 60027 100

80 50072 90067 10062 40055 300

300350400450500

374344320300283

781719669627593

14701350126011801120

30202780259024302290

45304170387036403430

87208020746070006610

13 90012 80011 90011 20010 500

24 60022 60021 00019 70018 600

50 10046 10042 90040 20038 000

550600650700750

269257246236228

563537514494476

10601010969931897

21802080199019101840

32603110298028602760

62805990574055105310

10 0009550915087908470

17 70016 90016 20015 50015 000

36 10034 40033 00031 70030 500

8008509009501000

220213206200195

460445431419407

866838812789767

17801720167016201580

26602580250024302360

51304960481046704550

81807910767074507240

14 50014 00013 60013 20012 800

29 50028 50027 70026 90026 100

11001200130014001500

185177169162156

387369353340327

729695666640616

15001430137013101270

22402140205019701900

43204120394037903650

68906570629060405820

12 20011 60011 10010 70010 300

24 80023 70022 70021 80021 000

16001700180019002000

151146142138134

316306296288280

595576558542527

12201180115011101080

18301770172016701620

35303410331032103120

56205440527051204980

10 0009610932090508800

20 30019 60019 00018 40018 000


READ ONLY


FUEL GAS PIPING

TABLE 1216.2(6)SCHEDULE 40 METALLIC PIPE [NFPA 54-12: TABLE 6.2(g)]*



1020304050

31902250184015901430

64304550372032202880

11 8008320679058805260

24 20017 10014 00012 10010 800

36 20025 60020 90018 10016 200

69 70049 30040 30034 90031 200

111 00078 60064 20055 60049 700

196 000139 000113 00098 20087 900

401 000283 000231 000200 000179 000

60708090100

1300120011501060979

26302430233021501980

48004450426039203620

98609130854080507430

14 80013 70012 80012 10011 100

28 50026 40024 70023 20021 400

45 40042 00039 30037 00034 200

80 20074 30069 50065 50060 400

164 000151 000142 000134 000123 000

125150175200250

876786728673558

17701590147013601170

32402910269024902200

66405960552051004510

99508940827076506760

19 20017 20015 90014 70013 000

30 60027 40025 40023 50020 800

54 00048 50044 90041 50036 700

110 00098 90091 60084 70074 900

300350400450500

506465433406384

1060973905849802

19901830171016001510

40903760350032903100

61305640525049204650

11 80010 90010 10094808950

18 80017 30016 10015 10014 300

33 30030 60028 50026 70025 200

67 80062 40058 10054 50051 500

550600650700750

364348333320308

762727696669644

14401370131012601210

29502810269025902490

44204210403038803730

85008110777074607190

13 60012 90012 40011 90011 500

24 00022 90021 90021 00020 300

48 90046 60044 60042 90041 300

8008509009501000

298288279271264

622602584567551

11701130110010701040

24102330226021902130

36103490338032903200

69406720652063306150

11 10010 70010 40010 1009810

19 60018 90018 40017 80017 300

39 90038 60037 40036 40035 400

11001200130014001500

250239229220212

524500478460443

987941901866834

20301930185017801710

30302900277026602570

58405580534051304940

93208890851081807880

16 50015 70015 00014 50013 900

33 60032 00030 70029 50028 400

16001700180019002000

205198192186181

428414401390379

806780756734714

16501600155015101470

24802400233022602200

47704620448043504230

76107360714069306740

13 40013 00012 60012 30011 900

27 40026 50025 70025 00024 300


READ ONLY


FUEL GAS PIPING

TABLE 1216.2(7)SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(h)]1, 2


TUBE SIZE (inch)

NOMINAL:K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:3 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959

LENGTH (feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR1020304050

20141110NA

4229232017

8558474035

148102827062

2101441169988

448308247211187

806554445381337

1270873701600532

26501820146012501110

60708090100

NANANANANA

1614131312

3229272624

5652484543

7973686460

170156145136129

306281262245232

482443413387366

1000924859806761

125150175200250

NANANANANA

1110NANANA

2220181715

3834312926

5348454137

114103958978

206186171159141

324294270251223

675612563523464

300350400450500

NANANANANA

NANANANANA

1312111110

2322201918

3331282725

7165615754

12811811010397

202186173162153

420387360338319

550600650700750

NANANANANA

NANANANANA

NANANANANA

1716151514

2423222120

5149474543

9288848178

145139133128123

303289277266256

8008509009501000

NANANANANA

NANANANANA

NANANANANA

1413131312

2019181817

4240393837

7573716967

119115111108105

247239232225219

11001200130014001500

NANANANANA

NANANANANA

NANANANANA

12111110NA

1616151414

3534323130

6360585654

10095918884

208199190183176

16001700180019002000

NANANANANA

NANANANANA

NANANANANA

NANANANANA

1313131212

2928272625

5250494746

8279777472

170164159155151

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPaNotes: 1 Table entries are rounded to 3 significant digits.2 NA means a flow of less than 10 ft3/h (0.283 m3/h).3 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(8)SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(i)]1, 2


TUBE SIZE (inch)

NOMINAL:K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:3 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959


2718151311

5538302623

11177615347

1951341079282

276190152131116

590406326279247

1060730586502445

16801150925791701

34902400193016501460

60708090100

10NANANANA

2119181716

4239363432

7468635956

10596908479

224206192180170

403371345324306

635585544510482

13201220113010601000

125150175200250

NANANANANA

14131211NA

2826242220

5045413934

7064595548

151136125117103

271245226210186

427387356331294

890806742690612

300350400450500

NANANANANA

NANANANANA

1816151413

3128262523

4440383533

9486807571

169155144135128

266245228214202

554510474445420

550600650700750

NANANANANA

NANANANANA

1312121111

2221202019

3230292827

6864625957

122116111107103

192183175168162

399381365350338

8008509009501000

NANANANANA

NANANANANA

1010NANANA

1818171716

2625242423

5553525049

9996939088

156151147143139

326315306297289

11001200130014001500

NANANANANA

NANANANANA

NANANANANA

1515141313

2221201918

4644424139

8480767371

132126120116111

274262251241232

16001700180019002000

NANANANANA

NANANANANA

NANANANANA

1312121111

1817171616

3837363534

6866646260

1081041019895

224217210204199

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPaNotes:1 Table entries are rounded to 3 significant digits.2 NA means a flow of less than 10 ft3/h (0.283 m3/h).3 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(9)SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(j)]1, 2


INTENDED USE: TUBE SIZING BETWEEN HOUSE LINE REGULATOR AND THE APPLIANCETUBE SIZE (inch)

NOMINAL:K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:3 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959


3927211816

8055443833

162111897768

283195156134119

402276222190168

859590474406359

15501060853730647

24401680135011501020

50803490280024002130

60708090100

1513131211

3028262423

6157534947

10799928682

152140131122116

326300279262247

586539502471445

925851791742701

19301770165015501460

125150175200250

NANANANANA

2018171614

4137343228

7265605650

10393857970

219198183170151

394357329306271

622563518482427

1290117010801000890

300350400450500

NANANANANA

13121110NA

2624222120

4541393634

6459555148

136125117110103

245226210197186

387356331311294

806742690647612

550600650700750

NANANANANA

NANANANANA

1918171616

3231302827

4644424039

9894908683

177169162155150

279266255245236

581554531510491

8008509009501000

NANANANANA

NANANANANA

1515141413

2626252423

3836353433

8078757371

144140135132128

228220214207202

474459445432420

11001200130014001500

NANANANANA

NANANANANA

1312121111

2221202019

3230292827

6864625957

122116111107103

192183175168162

399381365350338

16001700180019002000

NANANANANA

NANANANANA

1010NANANA

1818171716

2625242423

5553525049

9996939088

156151147143139

326315306297289

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPaNotes: 1 Table entries are rounded to 3 significant digits.2 NA means a flow of less than 10 ft3/h (0.283 m3/h).3 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(10)SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(k)]2


TUBE SIZE (inch)

NOMINAL:K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:1 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959


1901301059079

391269216185164

796547439376333

1390956768657582

197013601090932826

42202900233019901770

75905220419035903180

12 0008230661056505010

24 90017 10013 80011 80010 400

60708090100

7266625855

148137127119113

302278258243229

528486452424400

749689641601568

16001470137012801210

28802650246023102180

45404180389036503440

94608700809075907170

125150175200250

4844403833

10090837769

203184169157140

355321296275244

503456420390346

1080974896834739

19401750161015001330

30502770254023702100

63605760530049304370

300350400450500

3028262423

6257535047

12611610810296

221203189177168

313288268252238

670616573538508

121011101030968914

19001750163015301440

39603640339031803000

550600650700750

2221201918

4543413938

9187838077

159152145140135

226215206198191

482460441423408

868829793762734

13701310125012001160

28502720261025002410

8008509009501000

1817171616

3735343332

7472706866

130126122118115

184178173168163

394381370359349

709686665646628

1120108010501020991

23302250218021202060

11001200130014001500

1514141313

3129282726

6360575553

1091041009693

155148142136131

332316303291280

597569545524505

941898860826796

19601870179017201660

16001700180019002000

1212111111

2524242322

5149484745

8986848179

127123119115112

271262254247240

487472457444432

768744721700681

16001550150014601420

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPaNotes:1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.2 Table entries are rounded to 3 significant digits.

READ ONLY


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TABLE 1216.2(11)SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(l)]2


TUBE SIZE (inch)

NOMINAL:K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:1 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959


245169135116103

506348279239212

1030708568486431

18001240993850754

25501760141012101070

54503750301025802280

98206750542046404110

15 50010 600855073106480

32 20022 20017 80015 20013 500

60708090100

9386807571

192177164154146

391359334314296

683628584548518

969891829778735

20701900177016601570

37303430319029902830

58705400503047204450

12 20011 30010 50098209280

125150175200250

6357524943

12911710810089

263238219204181

459416383356315

651590543505448

1390126011601080956

25002270209019401720

39503580329030602710

82207450685063805650

300350400450500

3936333130

8074696561

164150140131124

286263245230217

406373347326308

866797741696657

15601430133012501180

24602260210019701870

51204710438041103880

550600650700750

2827262524

5855535149

118112108103100

206196188181174

292279267256247

624595570548528

112010701030986950

17701690162015501500

36903520337032403120

8008509009501000

2322222120

4746444342

9693908885

168163158153149

239231224217211

510493478464452

917888861836813

14501400136013201280

30102920283027402670

11001200130014001500

1918181716

4038363534

8177747168

142135129124120

201192183176170

429409392376363

772737705678653

12201160111010701030

25402420232022302140

16001700180019002000

1615151414

3331303029

6664626059

116112108105102

164159154149145

350339329319310

630610592575559

994962933906881

20702000194018901830

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPaNotes: 1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.2 Table entries are rounded to 3 significant digits.

READ ONLY


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TABLE 1216.2(12)SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(m)]3


INTENDED USE: PIPE SIZING BETWEEN POINT OF DELIVERY AND THE HOUSE LINE REGULATOR. TOTAL LOAD SUPPLIED BY ASINGLE HOUSE LINE REGULATOR NOT EXCEEDING 150 CUBIC FEET PER HOUR.2

TUBE SIZE (inch)

NOMINAL: K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:1 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959


303208167143127

625430345295262

1270874702601532

2220153012301050931

31502170174014901320

67404630372031802820

12 1008330669057305080

19 10013 10010 60090308000

39 80027 40022 00018 80016 700

60708090100

115106989287

237218203190180

482444413387366

843776722677640

120011001020961907

25602350219020501940

46004230394036903490

72506670621058205500

15 10013 90012 90012 10011 500

125150175200250

7770646053

159144133124110

324294270252223

567514472440390

804729670624553

17201560143013301180

30902800258024002130

48804420406037803350

10 2009200846078706980

300350400450500

4844413936

9991858075

202186173162153

353325302283268

501461429402380

1070984916859811

19301770165015501460

30402790260024402300

63205820541050804800

550600650700750

3533323029

7268656360

146139133128123

254243232223215

361344330317305

771735704676652

13901320127012201170

21902090200019201850

45604350416040003850

8008509009501000

2827272625

5857555352

119115111108105

208201195189184

295285276268261

629609590573558

11301100106010301000

17901730168016301580

37203600349033903300

11001200130014001500

2423222120

4947454342

10095918885

175167160153148

248237227218210

530505484465448

954910871837806

15001430137013201270

31302990286027502650

16001700180019002000

1919181817

4039383736

8279777472

143138134130126

202196190184179

432419406394383

779753731709690

12301190115011201090

25602470240023302270

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPaNotes:1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.2 Where this table is used to size the tubing upstream of a line pressure regulator, the pipe or tubing downstream of the line pressure regulator shall be sized

using a pressure drop no greater than 1 inch water column (0.249 kPa).3 Table entries are rounded to 3 significant digits.

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(13)SEMI-RIGID COPPER TUBING [NFPA 54-12: TABLE 6.2(n)]2


TUBE SIZE (inch)

NOMINAL:K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:1 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959


511351282241214

1050724582498441

2140147011801010898

37502580207017701570

53203650293025102230

11 4007800627053604750

20 40014 00011 30096608560

32 20022 20017 80015 20013 500

67 10046 10037 00031 70028 100

60708090100

194178166156147

400368342321303

813748696653617

14201310122011401080

20201860173016201530

43103960369034603270

77507130664062305880

12 20011 20010 50098209270

25 50023 40021 80020 40019 300

125150175200250

13011810910190

269243224208185

547495456424376

955866796741657

1360123011301050932

29002620241022501990

52104720435040403580

82207450685063705650

17 10015 50014 30013 30011 800

300350400450500

8175696562

167154143134127

340313291273258

595547509478451

844777722678640

18001660154014501370

32502990278026102460

51204710438041103880

10 7009810912085608090

550600650700750

5856535149

121115110106102

245234224215207

429409392376362

608580556534514

13001240119011401100

23402230214020501980

36903520337032403120

76807330702067406490

8008509009501000

4846454342

9895929087

200194188182177

350339328319310

497481466452440

106010301000967940

19101850179017401690

30102910282027402670

62706070588057105560

11001200130014001500

4038373534

8379767370

169161154148143

295281269259249

418399382367353

893852816784755

16101530147014101360

25302420232022202140

52805040482046304460

16001700180019002000

3332313029

6865636260

138133129125122

241233226219213

341330320311302

729705684664646

13101270123012001160

20702000194018901830

43104170404039303820

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPaNotes: 1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.2 Table entries are rounded to 3 significant digits.

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(14)CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(o)]1, 2

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPaNotes:1 Table entries are rounded to 3 significant digits.2 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased by an

equivalent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings, bends, or both.3 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD,

the greater the gas capacity of the tubing.


TUBE SIZE (EHD)3

FLOW DESIGNATION: 13 15 18 19 23 25 30 31 37 39 46 48 60 62LENGTH (feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

510152025

4632252219

6344353127

11582665852

13495776760

225161132116104

270192157137122

471330267231206

546383310269240

895639524456409

1037746615536482

179012601030888793

2070147012001050936

36602600214018501660

41402930240020801860

30405060

18151312

25211917

47413734

55474238

96837568

112978780

188162144131

218188168153

374325292267

442386347318

723625559509

856742665608

1520132011801080

1700147013201200

708090100

1110109

16151413

31292826

36333230

63605754

74696562

121113107101

141132125118

248232219208

295277262249

471440415393

563527498472

1000940887843

11101040983933

150200250300

7655

10987

20181615

23211917

42383432

48443936

78716357

91827467

17114813395

205179161148

320277247226

387336301275

691600538492

762661591540

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(15)CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(p)]1, 2

For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPaNotes:1 Table entries are rounded to 3 significant digits.2 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased by an

equivalent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings, bends, or both.3 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD,



INTENDED USE: INITIAL SUPPLY PRESSURE OF 8.0 INCH WATER COLUMN OR GREATERTUBE SIZE (EHD)3

FLOW DESIGNATION: 13 15 18 19 23 25 30 31 37 46 48 60 62LENGTH (feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

510152025

12083675751

160112907869

277197161140125

327231189164147

529380313273245

649462379329295

1180828673580518

1370958778672599

2140153012501090978

44303200254022001960

50103560291025302270

88006270514044604000

10 1007160585050704540

30405060

46393532

63544844

1151008982

13411610495

225196176161

270234210192

471407363330

546471421383

895778698639

1790155013801260

2070180016101470

3660318028502600

4140359032102930

708090100

29272624

41383634

76716763

88827773

150141133126

178167157149

306285268254

355331311295

593555524498

117010901030974

1360128012001140

2420226021402030

2720254024002280

150200250300

19171513

27232119

52454037

60524642

104918275

1221069587

206178159144

240207184168

409355319234

793686613559

936812728665

1660144012901180

1860161014401320

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(16)CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(q)]1, 2

For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPaNotes:1 Table entries are rounded to 3 significant digits.2 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased by an equiv-

alent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings, bends, or both.3 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the

greater the gas capacity of the tubing.


INTENDED USE: INITIAL SUPPLY PRESSURE OF 11.0 INCH WATER COLUMN OR GREATERTUBE SIZE (EHD)3

FLOW DESIGNATION: 13 15 18 19 23 25 30 31 37 46 48 60 62LENGTH (feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

510152025

173120968374

22916013011299

389277227197176

461327267231207

737529436380342

911649532462414

16901180960828739

195013701110958855

30002140176015301370

62804430361031202790

70505010410035603190

12 4008800721062705620

14 26010 100826071606400

30405060

67575146

90786963

161140125115

189164147134

313273245225

379329295270

673580518471

778672599546

12501090978895

2540220019601790

2910253022702070

5140446040003660

5850507045404140

708090100

42393735

58545148

1061009489

124116109104

209196185176

250234221210

435407383363

505471444421

830778735698

1660155014601380

1920180017001610

3390318030002850

3840359033903210

150200250300

28242119

39343027

73635752

85736660

145126114104

172149134122

294254226206

342295263240

573498447409

1130974870793

132011401020936

2340203018201660

2630228020401860

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(17)CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(r)]1, 2, 3, 4

For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPaNotes:1 Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 0.75 psi (5.17 kPa), DO NOT USE THIS TABLE. Con-

sult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator are capable of varying with flow rate.2 CAUTION: Capacities shown in table are capable of exceeding maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer

for guidance.3 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased

by an equivalent length of tubing according to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additionalfittings, bends, or both.

4 Table entries are rounded to 3 significant digits.5 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD,



TUBE SIZE (EHD)5FLOW DESIGNATION: 13 15 18 19 23 25 30 31 37 39 46 48 60 62


270166151129115

353220200172154

587374342297266

700444405351314

1100709650567510

1370876801696624

25901620148012701140

29901870170014701310

45102890264023002060

50373258298726052343

96006040551047604260

10 7006780620053804820

18 60011 90010 90094408470

21 60013 70012 50010 9009720

7580100150200

9389796455

1241201078775

218211189155135

257249222182157

420407366302263

512496445364317

922892795646557

10701030920748645

16901640147012101050

19321874168513891212

34703360300024402110

39503820342028002430

69406730603049404290

79407690688056204870

250300400500

49443834

67615246

1211109686

141129111100

236217189170

284260225202

497453390348

576525453404

941862749552

1090999871783

1890172014901330

2180199017301550

3850352030602740

4360398034503090

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(18)CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54-12: TABLE 6.2(s)]1, 2, 3, 4


TUBE SIZE (EHD)5

FLOW DESIGNATION: 13 15 18 19 23 25 30 31 37 39 46 48 60 62LENGTH (feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

1025304050

523322292251223

674420382329293

1080691632549492

1300827755654586

2000129011801030926

25301620148012801150

49203080280024202160

56603540323027902490

83005310486042303790

91405911542047274251

18 10011 40010 40089708020

19 80012 60011 50010 0008930

34 40022 00020 10017 40015 600

40 40025 60023 40020 20018 100

7580100150200

180174154124107

238230205166143

403391350287249

479463415339294

763740665548478

944915820672584

17501690151012301060

20201960174014201220

31103020271022201930

35063400305725212199

65306320565046003980

73207090635052004510

12 80012 40011 10091307930

14 80014 30012 80010 5009090

250300400500

95867466

12811610089

223204177159

263240208186

430394343309

524479416373

945860742662

1090995858766

1730159013801040

1977181315811422

3550324028002500

4040369032102870

7110650056505060

8140743064405760

For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m3/h, 1 pound-force per square inch = 6.8947 kPaNotes:1 Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 1 psi ( 7 kPa), DO NOT USE THIS TABLE. Consult with regu-

lator manufacturer for pressure drops and capacity factors. Pressure drops across regulator are capable of varying with the flow rate.2 CAUTION: Capacities shown in table are capable of exceeding the maximum capacity of selected regulator. Consult tubing manufacturer for guidance.3 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased by an equiva-

lent length of tubing to the following equation: L = 1.3 n, where L is additional length (feet) of tubing and n is the number of additional fittings, bends, or both.4 Table entries are rounded to 3 significant digits.5 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater

the gas capacity of the tubing.

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(19)POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.2(t)]*



PIPE SIZE (inch)NOMINAL OD: 1⁄2 3⁄4 1 1 1⁄4 1 1⁄2 2 3 4DESIGNATION: SDR 9.3 SDR 11 SDR 11 SDR 10 SDR 11 SDR 11 SDR 11 SDR 11ACTUAL ID: 0.660 0.860 1.077 1.328 1.554 1.943 2.864 3.682LENGTH (feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

10 153 305 551 955 1440 2590 7170 13 90020 105 210 379 656 991 1780 4920 952030 84 169 304 527 796 1430 3950 764040 72 144 260 451 681 1220 3380 654050 64 128 231 400 604 1080 3000 580060 58 116 209 362 547 983 2720 525070 53 107 192 333 503 904 2500 483080 50 99 179 310 468 841 2330 450090 46 93 168 291 439 789 2180 4220100 44 88 159 275 415 745 2060 3990125 39 78 141 243 368 661 1830 3530150 35 71 127 221 333 598 1660 3200175 32 65 117 203 306 551 1520 2940200 30 60 109 189 285 512 1420 2740250 27 54 97 167 253 454 1260 2430300 24 48 88 152 229 411 1140 2200350 22 45 81 139 211 378 1050 2020400 21 42 75 130 196 352 974 1880450 19 39 70 122 184 330 914 1770500 18 37 66 115 174 312 863 1670

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FUEL GAS PIPING

TABLE 1216.2(20)POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.2(u)]*




10 201 403 726 1260 1900 3410 9450 18 26020 138 277 499 865 1310 2350 6490 12 55030 111 222 401 695 1050 1880 5210 10 08040 95 190 343 594 898 1610 4460 863050 84 169 304 527 796 1430 3950 764060 76 153 276 477 721 1300 3580 693070 70 140 254 439 663 1190 3300 637080 65 131 236 409 617 1110 3070 593090 61 123 221 383 579 1040 2880 5560100 58 116 209 362 547 983 2720 5250125 51 103 185 321 485 871 2410 4660150 46 93 168 291 439 789 2180 4220175 43 86 154 268 404 726 2010 3880200 40 80 144 249 376 675 1870 3610250 35 71 127 221 333 598 1660 3200300 32 64 115 200 302 542 1500 2900350 29 59 106 184 278 499 1380 2670400 27 55 99 171 258 464 1280 2480450 26 51 93 160 242 435 1200 2330500 24 48 88 152 229 411 1140 2200

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(21)POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.2(v)]*




10 1860 3720 6710 11 600 17 600 31 600 87 300 169 00020 1280 2560 4610 7990 12 100 21 700 60 000 116 00030 1030 2050 3710 6420 9690 17 400 48 200 93 20040 878 1760 3170 5490 8300 14 900 41 200 79 70050 778 1560 2810 4870 7350 13 200 36 600 70 70060 705 1410 2550 4410 6660 12 000 33 100 64 00070 649 1300 2340 4060 6130 11 000 30 500 58 90080 603 1210 2180 3780 5700 10 200 28 300 54 80090 566 1130 2050 3540 5350 9610 26 600 51 400100 535 1070 1930 3350 5050 9080 25 100 48 600125 474 949 1710 2970 4480 8050 22 300 43 000150 429 860 1550 2690 4060 7290 20 200 39 000175 395 791 1430 2470 3730 6710 18 600 35 900200 368 736 1330 2300 3470 6240 17 300 33 400250 326 652 1180 2040 3080 5530 15 300 29 600300 295 591 1070 1850 2790 5010 13 900 26 800350 272 544 981 1700 2570 4610 12 800 24 700400 253 506 913 1580 2390 4290 11 900 22 900450 237 475 856 1480 2240 4020 11 100 21 500500 224 448 809 1400 2120 3800 10 500 20 300550 213 426 768 1330 2010 3610 9990 19 300600 203 406 733 1270 1920 3440 9530 18 400650 194 389 702 1220 1840 3300 9130 17 600700 187 374 674 1170 1760 3170 8770 16 900750 180 360 649 1130 1700 3050 8450 16 300800 174 348 627 1090 1640 2950 8160 15 800850 168 336 607 1050 1590 2850 7890 15 300900 163 326 588 1020 1540 2770 7650 14 800950 158 317 572 990 1500 2690 7430 14 4001000 154 308 556 963 1450 2610 7230 14 0001100 146 293 528 915 1380 2480 6870 13 3001200 139 279 504 873 1320 2370 6550 12 7001300 134 267 482 836 1260 2270 6270 12 1001400 128 257 463 803 1210 2180 6030 11 6001500 124 247 446 773 1170 2100 5810 11 2001600 119 239 431 747 1130 2030 5610 10 8001700 115 231 417 723 1090 1960 5430 10 5001800 112 224 404 701 1060 1900 5260 10 2001900 109 218 393 680 1030 1850 5110 99002000 106 212 382 662 1000 1800 4970 9600

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(22)POLYETHYLENE PLASTIC TUBING [NFPA 54-12: TABLE 6.2(w)]2, 3

TABLE 1216.2(23)POLYETHYLENE PLASTIC TUBING [NFPA 54-12: TABLE 6.2(x)]2, 3

GAS: NATURALINLET PRESSURE: LESS THAN 2.0 psiPRESSURE DROP: 0.3 in. w.c.SPECIFIC GRAVITY: 0.60PLASTIC TUBING SIZE (CTS)1 (inch)

NOMINAL OD: 1⁄2 1DESIGNATION: SDR 7 SDR 11ACTUAL ID: 0.445 0.927LENGTH (feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

1020304050

5437302623

372256205176156

60708090100

2119181716

141130121113107

125150175200

14131211

95867974

225250275300

10NANANA

69656259

350400450500

NANANANA

54514745

GAS: NATURALINLET PRESSURE: LESS THAN 2.0 psiPRESSURE DROP: 0.5 in. w.c.SPECIFIC GRAVITY: 0.60PLASTIC TUBING SIZE (CTS)1 (inch)

NOMINAL OD: 1⁄2 1DESIGNATION: SDR 7 SDR 11ACTUAL ID: 0.445 0.927LENGTH (feet) CAPACITY IN CUBIC FEET OF GAS PER HOUR

1020304050

7249393430

490337271232205

60708090100

2725232221

186171159149141

125150175200

18171514

12511310497

225250275300

13121111

91868278

350400450500

10NANANA

72676359

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour =0.0283m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column= 0.249 kPaNotes:1 CTS = Copper tube size.2 Table entries are rounded to 3 significant digits.3 NA means a flow of less than 10 ft3/h (0.283 m3/h).

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1 cubic foot per hour =0.0283m3/h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column= 0.249 kPaNotes:1 CTS = Copper tube size.2 Table entries are rounded to 3 significant digits.3 NA means a flow of less than 10 ft3/h (0.283 m3/h).READ O

NLY


FUEL GAS PIPING

TABLE 1216.2(24)SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3(a)]*

GAS: UNDILUTED PROPANEINLET PRESSURE: 10.0 psiPRESSURE DROP: 1.0 psiSPECIFIC GRAVITY: 1.50

INTENDED USE: PIPE SIZING BETWEEN FIRST STAGE (HIGH PRESSURE) REGULATOR AND SECOND STAGE (LOW PRESSURE) REGULATORPIPE SIZE (inch)

NOMINALINSIDE:

1⁄2 3⁄4 1 11⁄4 11⁄2 2 21⁄2 3 4

ACTUAL: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026LENGTH(feet) CAPACITY IN THOUSANDS OF BTU PER HOUR

1020304050

33202280183015701390

69504780384032802910

13 1009000722061805480

26 90018 50014 80012 70011 300

40 30027 70022 20019 00016 900

77 60053 30042 80036 60032 500

124 00085 00068 20058 40051 700

219 000150 000121 000103 00091 500

446 000306 000246 000211 000187 000

60708090100

1260116010801010956

26402430226021202000

49704570425039903770

10 2009380873081907730

15 30014 10013 10012 30011 600

29 40027 10025 20023 60022 300

46 90043 10040 10037 70035 600

82 90076 30070 90066 60062 900

169 000156 000145 000136 000128 000

125150175200250

848768706657582

17701610148013701220

33403020278025902290

68506210571053204710

10 3009300856079607060

19 80017 90016 50015 30013 600

31 50028 60026 30024 40021 700

55 70050 50046 50043 20038 300

114 000103 00094 70088 10078 100

300350400450500

528486452424400

11001020945886837

20801910178016701580

42703930365034303240

64005880547051404850

12 30011 30010 50098909340

19 60018 10016 80015 80014 900

34 70031 90029 70027 90026 300

70 80065 10060 60056 80053 700

550600650700750

380363347334321

795759726698672

15001430137013101270

30702930281027002600

46104400421040403900

88708460811077907500

14 10013 50012 90012 40012 000

25 00023 90022 80021 90021 100

51 00048 60046 60044 80043 100

8008509009501000

310300291283275

649628609592575

12201180115011101080

25102430236022902230

37603640353034303330

72407010680066006420

11 50011 20010 80010 50010 200

20 40019 80019 20018 60018 100

41 60040 30039 10037 90036 900

11001200130014001500

261249239229221

546521499480462

1030982940903870

21102020193018501790

31703020289027802680

61005820557053505160

97209270888085308220

17 20016 40015 70015 10014 500

35 00033 40032 00030 80029 600

16001700180019002000

213206200194189

446432419407395

840813789766745

17301670162015701530

25902500243023602290

49804820467045404410

79407680745072307030

14 00013 60013 20012 80012 400

28 60027 70026 90026 10025 400

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPa* Table entries are rounded to 3 significant digits.

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(25)SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3(b)]*


INTENDED USE: PIPE SIZING BETWEEN FIRST STAGE (HIGH PRESSURE) REGULATOR AND SECOND STAGE (LOW PRESSURE) REGULATORPIPE SIZE (inch)

NOMINALINSIDE:

1⁄2 3⁄4 1 11⁄4 11⁄2 2 21⁄2 3 4

ACTUAL: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026LENGTH(feet) CAPACITY IN THOUSANDS OF BTU PER HOUR

1020304050

58904050325027802460

12 3008460679058105150

23 20015 90012 80011 0009710

47 60032 70026 30022 50019 900

71 30049 00039 40033 70029 900

137 00094 40075 80064 90057 500

219 000150 000121 000103 00091 600

387 000266 000214 000183 000162 000

789 000543 000436 000373 000330 000

60708090100

22302050191017901690

46704300400037503540

87908090753070606670

18 10016 60015 50014 50013 700

27 10024 90023 20021 70020 500

52 10047 90044 60041 80039 500

83 00076 40071 10066 70063 000

147 000135 000126 000118 000111 000

299 000275 000256 000240 000227 000

125150175200250

15001360125011601030

31402840262024302160

59105360493045804060

12 10011 00010 10094108340

18 20016 50015 20014 10012 500

35 00031 70029 20027 20024 100

55 80050 60046 50043 30038 400

98 70089 40082 30076 50067 800

201 000182 000167 800156 100138 400

300350400450500

935860800751709

19501800167015701480

36803390315029602790

75606950647060705730

11 30010 400969090908590

21 80020 10018 70017 50016 500

34 80032 00029 80027 90026 400

61 50056 50052 60049 40046 600

125 400115 300107 300100 70095 100

550600650700750

673642615591569

14101340129012401190

26502530242023302240

54505200498047804600

81607780745071606900

15 70015 00014 40013 80013 300

25 00023 90022 90022 00021 200

44 30042 20040 50038 90037 400

90 30086 20082 50079 30076 400

8008509009501000

550532516501487

11501110108010501020

21702100203019701920

44504300417040503940

66606450625060705900

12 80012 40012 00011 70011 400

20 50019 80019 20018 60018 100

36 20035 00033 90032 90032 000

73 70071 40069 20067 20065 400

11001200130014001500

463442423406391

968923884849818

18201740167016001540

37403570342032803160

56105350512049204740

10 80010 300987094809130

17 20016 40015 70015 10014 600

30 40029 00027 80026 70025 700

62 10059 20056 70054 50052 500

16001700180019002000

378366355344335

790765741720700

14901440140013601320

30602960287027802710

45804430430041704060

88208530827080407820

14 10013 60013 20012 80012 500

24 80024 00023 30022 60022 000

50 70049 00047 60046 20044 900


READ ONLY


FUEL GAS PIPING

TABLE 1216.2(26)SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3(c)]*


INTENDED USE: PIPE SIZING BETWEEN 2 PSI SERVICE AND LINE PRESSURE REGULATORPIPE SIZE (inch)

NOMINAL: 1⁄2 3⁄4 1 11⁄4 11⁄2 2 21⁄2 3 4

ACTUAL ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026LENGTH(feet) CAPACITY IN THOUSANDS OF BTU PER HOUR

1020304050

26801840148012601120

55903850309026402340

10 5007240582049804410

21 60014 90011 90010 2009060

32 40022 30017 90015 30013 600

62 40042 90034 50029 50026 100

99 50068 40054 90047 00041 700

176 000121 00097 10083 10073 700

359 000247 000198 000170 000150 000

60708090100

1010934869815770

21201950182017001610

40003680342032103030

82107550702065906230

12 30011 30010 50098809330

23 70021 80020 30019 00018 000

37 70034 70032 30030 30028 600

66 70061 40057 10053 60050 600

136 000125 000116 000109 000103 000

125150175200250

682618569529469

1430129011901110981

26902440224020801850

55205000460042803790

82707490689064105680

15 90014 40013 30012 30010 900

25 40023 00021 20019 70017 400

44 90040 70037 40034 80030 800

91 50082 90076 30071 00062 900

300350400450500

425391364341322

889817760714674

16701540143013401270

34403160294027602610

51504740441041303910

99209120849079607520

15 80014 50013 50012 70012 000

27 90025 70023 90022 40021 200

57 00052 40048 80045 80043 200

550600650700750

306292280269259

640611585562541

12101150110010601020

24802360226021702090

37103540339032603140

71406820653062706040

11 40010 90010 40099909630

20 10019 20018 40017 70017 000

41 10039 20037 50036 00034 700

8008509009501000

250242235228222

523506490476463

985953924897873

20201960190018401790

30302930284027602680

58305640547053105170

93009000872084708240

16 40015 90015 40015 00014 600

33 50032 40031 50030 50029 700

11001200130014001500

210201192185178

440420402386372

829791757727701

17001620155014901440

25502430233022402160

49104680449043104150

78307470715068706620

13 80013 20012 60012 10011 700

28 20026 90025 80024 80023 900

16001700180019002000

172166161157152

359348337327318

677655635617600

13901340130012701230

20802010195019001840

40103880376036503550

63906180600058205660

11 30010 90010 60010 30010 000

23 00022 30021 60021 00020 400


READ ONLY


FUEL GAS PIPING

TABLE 1216.2(27)SCHEDULE 40 METALLIC PIPE [NFPA 54: TABLE 6.3(d)]*

GAS: UNDILUTED PROPANEINLET PRESSURE: 11.0 in. w.c.PRESSURE DROP: 0.5 in. w.c.SPECIFIC GRAVITY: 1.50

INTENDED USE: PIPE SIZING BETWEEN SINGLE OR SECOND STAGE (LOW PRESSURE) REGULATOR AND APPLIANCEPIPE SIZE (inch)

NOMINALINSIDE:

1⁄2 3⁄4 1 11⁄4 11⁄2 2 21⁄2 3 4

ACTUAL ID: 0.622 0.824 1.049 1.380 1.610 2.067 2.469 3.068 4.026LENGTH(feet) CAPACITY IN THOUSANDS OF BTU PER HOUR

1020304050

291200160137122

608418336287255

1150787632541480

2350162013001110985

35202420194016601480

67904660375032102840

10 8007430597051104530

19 10013 10010 60090308000

39 00026 80021 50018 40016 300

6080100125150

110101948984

231212197185175

434400372349330

892821763716677

13401230114010701010

25702370220020701950

41003770351032903110

72506670621058205500

14 80013 60012 70011 90011 200

175200250300350

7467625851

155140129120107

292265243227201

600543500465412

899814749697618

17301570144013401190

27602500230021401900

48804420406037803350

99509010829077106840

400450500550600

4642403735

9789837873

182167156146138

373344320300283

560515479449424

1080991922865817

17201580147013801300

30402790260024402300

61905700530049704700

650700750800850

3332302928

7066646159

131125120115111

269257246236227

403385368354341

776741709681656

12401180113010901050

21902090200019201850

44604260408039203770

900950100011001200

2726252524

5755535250

1071041009795

220213206200195

329319309300292

634613595578562

1010978948921895

17901730168016301580

36403530342033203230

13001400150016001700

2322212019

4846444240

9086827976

185176169162156

277264253243234

534509487468451

850811777746719

15001430137013201270

30702930280026902590

180019002000

191818

393837

747169

151146142

226219212

436422409

694672652

123011901150

250024202350

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa* Table entries are rounded to 3 significant digits.

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(28)SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.3(e)]2

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPaNotes:1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.2 Table entries are rounded to 3 significant digits.


INTENDED USE: TUBE SIZING BETWEEN FIRST STAGE (HIGH PRESSURE) REGULATOR AND SECOND STAGE (LOW PRESSURE) REGULATORTUBE SIZE (inch)

NOMINAL:K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:1 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959

LENGTH (feet) CAPACITY IN THOUSANDS OF BTU PER HOUR1020304050

513352283242215

1060727584500443

2150148011901020901

37602580208017801570

53303670294025202230

11 4007830629053804770

20 50014 10011 30096908590

32 30022 20017 90015 30013 500

67 40046 30037 20031 80028 200

60708090100

194179166156147

401369343322304

816751699655619

14301310122011501080

20201860173016301540

43203980370034703280

77807160666062505900

12 30011 30010 50098509310

25 60023 50021 90020 50019 400

125150175200250

13111810910190

270244225209185

549497457426377

959869799744659

1360123011301060935

29102630242022502000

52304740436040603600

82507470688064005670

17 20015 60014 30013 30011 800

300350400450500

8175706562

168155144135127

342314292274259

597549511480453

847779725680643

18101660155014501370

32603000279026202470

51404730440041303900

10 7009840916085908120

550600650700750

5956545150

121115111106102

246235225216208

430410393378364

610582558536516

13001240119011401100

23502240214020601980

37003530338032503130

77107350704067706520

8008509009501000

4846454442

9996939088

201195189183178

351340330320311

498482468454442

106010301000970944

19201850180017501700

30202920284027502680

62906090591057305580

11001200130014001500

4038373534

8379767370

169161155148143

296282270260250

420400383368355

896855819787758

16101540147014201360

25402430232022302150

53005050484046504480

16001700180019002000

3332313029

6866646260

138134130126122

241234227220214

343331321312304

732708687667648

13201270124012001170

20802010195018901840

43304190406039403830

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(29)SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.3(f)]2, 3

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPaNotes:1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.2 Table entries are rounded to 3 significant digits.3 NA means a flow of less than 10 000 Btu/h (2.93 kW).


INTENDED USE: TUBE SIZING BETWEEN SINGLE OR SECOND STAGE (LOW PRESSURE) REGULATOR AND APPLIANCETUBE SIZE (inch)

NOMINAL:K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:1 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959


4531252119

9364514439

1881291048979

329226182155138

467321258220195

997685550471417

18001230991848752

28301950156013401180

58904050325027802470

60708090100

1716151413

3532302827

7166615754

12511510710095

177163152142134

378348324304287

681626583547517

1070988919862814

22402060191018001700

125150175200250

1110NANANA

2421201816

4844403733

8476706558

119108999282

254230212197175

458415382355315

722654602560496

15001360125011701030

300350400450500

NANANANANA

1514131211

3028262423

5248454240

7468636056

158146136127120

285262244229216

449414385361341

936861801752710

550600650700750

NANANANANA

1110NANANA

2221201918

3836343332

5351494745

11410910410096

205196188180174

324309296284274

674643616592570

8008509009501000

NANANANANA

NANANANANA

1817171616

3130292827

4442414039

9390878583

168162157153149

264256248241234

551533517502488

11001200130014001500

NANANANANA

NANANANANA

1514141313

2625242322

3735343231

7875726966

141135129124119

223212203195188

464442423407392

16001700180019002000

NANANANANA

NANANANANA

1212111111

2120201919

3029282727

6462605857

115112108105102

182176170166161

378366355345335

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(30)SEMI-RIGID COPPER TUBING [NFPA 54: TABLE 6.3(g)]2

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPaNotes:1 Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.2 Table entries are rounded to 3 significant digits.


INTENDED USE: TUBE SIZING BETWEEN 2 PSIG SERVICE AND LINE PRESSURE REGULATORTUBE SIZE (inch)

NOMINAL:K & L: 1⁄4 3⁄8 1⁄2 5⁄8 3⁄4 1 11⁄4 11⁄2 2ACR: 3⁄8 1⁄2 5⁄8 3⁄4 7⁄8 11⁄8 13⁄8 – –

OUTSIDE: 0.375 0.500 0.625 0.750 0.875 1.125 1.375 1.625 2.125INSIDE:1 0.305 0.402 0.527 0.652 0.745 0.995 1.245 1.481 1.959


413284228195173

852585470402356

17301190956818725

30302080167014301270

43002950237020301800

91706310506043303840

16 50011 400912078006920

26 00017 90014 40012 30010 900

54 20037 30029 90025 60022 700

60708090100

157144134126119

323297276259245

657605562528498

11501060983922871

16301500139013101240

34803200298027902640

62705760536050304750

98809090845079307490

20 60018 90017 60016 50015 600

125150175200250

10595888272

217197181168149

442400368343304

772700644599531

1100992913849753

23402120195018101610

42103820351032702900

66406020554051504560

13 80012 50011 50010 7009510

300350400450500

6660565350

135124116109103

275253235221209

481442411386365

682628584548517

14601340125011701110

26202410225021101990

41403800354033203140

86107920737069206530

550600650700750

4745434140

9793898682

198189181174168

346330316304293

491469449431415

10501000959921888

18901800173016601600

29802840272026202520

62105920567054505250

8008509009501000

3937363534

8077757271

162157152147143

283274265258251

401388376366356

857829804781760

15401490145014101370

24302350228022202160

50704900475046204490

11001200130014001500

3231302827

6764615957

136130124120115

238227217209201

338322309296286

721688659633610

13001240119011401100

20501950187018001730

42704070390037403610

16001700180019002000

2626252423

5553515048

11110810410199

194188182177172

276267259251244

589570553537522

106010301000966940

16701620157015201480

34803370327031703090

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(31)CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.3(h)]1, 2

For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPaNotes:1 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased

by an equivalent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings,bends, or both.




INTENDED USE: CSST SIZING BETWEEN SINGLE OR SECOND STAGE (LOW PRESSURE) REGULATOR AND APPLIANCE SHUTOFF VALVETUBE SIZE (EHD)3

FLOW DESIGNATION: 13 15 18 19 23 25 30 31 37 39 46 48 60 62LENGTH (feet) CAPACITY IN THOUSANDS OF BTU PER HOUR

5101520

72503934

99695549

18112910491

211150121106

355254208183

426303248216

744521422365

863605490425

1420971775661

16381179972847

2830199016201400

3270232019001650

5780411033702930

6550464037903290

25304050

30282320

42393330

82746458

94877466

164151131118

192177153137

325297256227

379344297265

583528449397

762698610548

12501140988884

1480135011701050

2630240020901870

2940268023302080

60708090

19171515

26252322

53494544

60575250

107999490

126117109102

207191178169

241222208197

359330307286

502466438414

805745696656

961890833787

1710159014901400

1900176016501550

100150200250300

1411988

2015141211

4131282523

4736333026

8566605350

9875696157

1591231129990

186143129117107

270217183163147

393324283254234

621506438390357

746611531476434

13301090948850777

148012101050934854

READ ONLY


FUEL GAS PIPING

TABLE 1216.2(32)CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.3(i)]1, 2, 3, 4


INTENDED USE: CSST SIZING BETWEEN 2 PSI SERVICE AND LINE PRESSURE REGULATORTUBE SIZE (EHD)5


1025304050

426262238203181

558347316271243

927591540469420

1110701640554496

174011201030896806

2170138012701100986

41002560233020101790

47202950269023202070

71304560418036303260

79585147471941163702

15 2009550871075306730

16 80010 700979085007610

29 40018 80017 20014 90013 400

34 20021 70019 80017 20015 400

7580100150200

14714012410186

196189169137118

344333298245213

406393350287248

663643578477415

809768703575501

1460141012601020880

16901630145011801020

26802590233019101660

30532961266221951915

54805300474038603340

62306040541044303840

11 00010 600953078106780

12 60012 20010 90088907710

250300400500

77696053

105968272

191173151135

222203175158

373343298268

448411355319

785716616550

910829716638

1490136011601030

1722157813761237

2980272023502100

3440315027302450

6080556048304330

6900630054604880

For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPaNotes:1 Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 0.5 psi (3.4 kPa) [based on 13 inch water column (3.2 kPa)

outlet pressure], DO NOT USE THIS TABLE. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulatorare capable of varying with flow rate.

2 CAUTION: Capacities shown in table are capable of exceeding the maximum capacity for a selected regulator. Consult with regulator or tubing manufac-turer for guidance.

3 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased byan equivalent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings, bends, orboth.


the greater the gas capacity of the tubing.READ ONLY


FUEL GAS PIPING

TABLE 1216.2(33)CORRUGATED STAINLESS STEEL TUBING (CSST) [NFPA 54: TABLE 6.3(j)]1, 2, 3, 4

GAS: UNDILUTED PROPANEINLET PRESSURE: 5.0 psiPRESSURE DROP: 3.5 psi SPECIFIC GRAVITY: 1.50

TUBE SIZE (EHD)5


1025304050

826509461396352

1070664603520463

17101090999867777

2060131011901030926

31502040187016301460

40002550234020301820

78304860443038203410

89505600510044003930

13 1008400768066805990

14 4419339856474696717

28 60018 00016 40014 20012 700

31 20019 90018 20015 80014 100

54 40034 70031 70027 60024 700

63 80040 40036 90032 00028 600

7580100150200

284275243196169

376363324262226

637618553453393

757731656535464

121011701050866755

1490145013001060923

27702680239019401680

31903090276022401930

49204770428035103050

55395372483039833474

10 3009990893072706290

11 60011 20010 00082107130

20 30019 60017 60014 40012 500

23 40022 70020 30016 60014 400

250300400500

150136117104

202183158140

352322279251

415379328294

679622542488

828757657589

1490136011701050

1730157013601210

2740251021801950

3124286524982247

5620512044303960

6390584050704540

11 20010 30089208000

12 90011 70010 2009110

For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 pound-force per square inch = 6.8947 kPaNotes:1 Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 0.5 psi (3.4 kPa) [based on 13 inch water column (3.2 kPa) out-

let pressure], DO NOT USE THIS TABLE. Consult with regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator are capa-ble of varying with flow rate.

2 CAUTION: Capacities shown in table are capable of exceeding the maximum capacity for a selected regulator. Consult with regulator or tubing manufacturer forguidance.

3 Table includes losses for four 90 degree (1.57 rad) bends and two end fittings. Tubing runs with larger numbers of bends, fittings, or both shall be increased by an equiv-alent length of tubing to the following equation: L = 1.3 n, where L is additional length (ft) of tubing and n is the number of additional fittings, bends, or both.

4 Table entries are rounded to 3 significant digits.5 EHD = Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the

greater the gas capacity of the tubing.

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TABLE 1216.2(34)POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.3(k)]*

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 inch water column = 0.249 kPa* Table entries are rounded to 3 significant digits.


INTENDED USE: PE SIZING BETWEEN INTEGRAL SECOND-STAGE REGULATOR AT TANK OR SECOND-STAGE (LOW PRESSURE) REGULATOR AND BUILDING

PIPE SIZE (inch)NOMINAL OD: 1⁄2 3⁄4 1 11⁄4 11⁄2 2 3 4DESIGNATION: SDR 9.3 SDR 11 SDR 11 SDR 10 SDR 11 SDR 11 SDR 11 SDR 11ACTUAL ID: 0.660 0.860 1.077 1.328 1.554 1.943 2.864 3.682LENGTH (feet) CAPACITY IN THOUSANDS OF BTU PER HOUR

10 340 680 1230 2130 3210 5770 16 000 30 90020 233 468 844 1460 2210 3970 11 000 21 20030 187 375 677 1170 1770 3180 8810 17 00040 160 321 580 1000 1520 2730 7540 14 60050 142 285 514 890 1340 2420 6680 12 90060 129 258 466 807 1220 2190 6050 11 70070 119 237 428 742 1120 2010 5570 10 80080 110 221 398 690 1040 1870 5180 10 00090 103 207 374 648 978 1760 4860 9400100 98 196 353 612 924 1660 4590 8900125 87 173 313 542 819 1470 4070 7900150 78 157 284 491 742 1330 3690 7130175 72 145 261 452 683 1230 3390 6560200 67 135 243 420 635 1140 3160 6100250 60 119 215 373 563 1010 2800 5410300 54 108 195 338 510 916 2530 4900350 50 99 179 311 469 843 2330 4510400 46 92 167 289 436 784 2170 4190450 43 87 157 271 409 736 2040 3930500 41 82 148 256 387 695 1920 3720

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FUEL GAS PIPING

TABLE 1216.2(35)POLYETHYLENE PLASTIC PIPE [NFPA 54-12: TABLE 6.3(l)]*



INTENDED USE: PE PIPE SIZING BETWEEN 2 PSI SERVICE REGULATOR AND LINE PRESSURE REGULATORPIPE SIZE (inch)

NOMINAL OD: 1⁄2 3⁄4 1 11⁄4 11⁄2 2 3 4DESIGNATION: SDR 9.3 SDR 11 SDR 11 SDR 10 SDR 11 SDR 11 SDR 11 SDR 11ACTUAL ID: 0.660 0.860 1.077 1.328 1.554 1.943 2.864 3.682LENGTH (feet) CAPACITY IN THOUSANDS OF BTU PER HOUR

10 3130 6260 11 300 19 600 29 500 53 100 147 000 284 00020 2150 4300 7760 13 400 20 300 36 500 101 000 195 00030 1730 3450 6230 10 800 16 300 29 300 81 100 157 00040 1480 2960 5330 9240 14 000 25 100 69 400 134 10050 1310 2620 4730 8190 12 400 22 200 61 500 119 00060 1190 2370 4280 7420 11 200 20 100 55 700 108 00070 1090 2180 3940 6830 10 300 18 500 51 300 99 10080 1010 2030 3670 6350 9590 17 200 47 700 92 20090 952 1910 3440 5960 9000 16 200 44 700 86 500100 899 1800 3250 5630 8500 15 300 42 300 81 700125 797 1600 2880 4990 7530 13 500 37 500 72 400150 722 1450 2610 4520 6830 12 300 33 900 65 600175 664 1330 2400 4160 6280 11 300 31 200 60 300200 618 1240 2230 3870 5840 10 500 29 000 56 100250 548 1100 1980 3430 5180 9300 25 700 49 800300 496 994 1790 3110 4690 8430 23 300 45 100350 457 914 1650 2860 4320 7760 21 500 41 500400 425 851 1530 2660 4020 7220 12 000 38 600450 399 798 1440 2500 3770 6770 18 700 36 200500 377 754 1360 2360 3560 6390 17 700 34 200550 358 716 1290 2240 3380 6070 16 800 32 500600 341 683 1230 2140 3220 5790 16 000 31 000650 327 654 1180 2040 3090 5550 15 400 29 700700 314 628 1130 1960 2970 5330 14 700 28 500750 302 605 1090 1890 2860 5140 14 200 27 500800 292 585 1050 1830 2760 4960 13 700 26 500850 283 566 1020 1770 2670 4800 13 300 25 700900 274 549 990 1710 2590 4650 12 900 24 900950 266 533 961 1670 2520 4520 12 500 24 2001000 259 518 935 1620 2450 4400 12 200 23 5001100 246 492 888 1540 2320 4170 11 500 22 3001200 234 470 847 1470 2220 3980 11 000 21 3001300 225 450 811 1410 2120 3810 10 600 20 4001400 216 432 779 1350 2040 3660 10 100 19 6001500 208 416 751 1300 1960 3530 9760 18 9001600 201 402 725 1260 1900 3410 9430 18 2001700 194 389 702 1220 1840 3300 9130 17 6001800 188 377 680 1180 1780 3200 8850 17 1001900 183 366 661 1140 1730 3110 8590 16 6002000 178 356 643 1110 1680 3020 8360 16 200

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TABLE 1216.2(36)POLYETHYLENE PLASTIC TUBING [NFPA 54-12: TABLE 6.3(m)]2


INTENDED USE: PE TUBE SIZING BETWEEN INTEGRAL SECOND-STAGE REGULATOR AT TANK OR SECOND-STAGE

(LOW PRESSURE) REGULATOR AND BUILDINGPLASTIC TUBING SIZE (CTS)1 (inch)

NOMINAL OD: 1⁄2 1DESIGNATION: SDR 7 SDR 11ACTUAL ID: 0.445 0.927LENGTH (feet) CAPACITY IN THOUSANDS OF BTU PER HOUR

1020304050

12183675751

828569457391347

60708090100

4642393735

314289269252238

125150175200

31282624

211191176164

225250275300

22212019

154145138132

350400450500

18161515

121113106100

For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm, 1000 British thermal units perhour = 0.293 kW, 1 inch water column = 0.249 kPaNotes:1 CTS = Copper tube size.2 Table entries are rounded to 3 significant digits.READ O

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