Delaware County Community College Project #177901246 … · Delaware County Community College...

Delaware County Community College Project #177901246Marple Campus Renovation - Phase 2 100% Construction Documents

November 23, 2011

SECTION 237000 - HVAC PIPE AND FITTINGS

PART 1 - GENERAL

1.1 PIPING SYSTEM STANDARDS OF MATERIALS

A. Piping and fitting materials shall conform to the specification standards of the recognizedauthorities listed below. References shall be to the latest edition in force at the time of bidding.

B. Materials listed below shall be subject to approval of local governing authorities.

C. Where plumbing systems connect to equipment provided or installed under the HVAC sectionof the specifications, the Plumbing Contractor shall terminate the plumbing systems within5 feet of final connection point of the equipment with a shutoff valve as specified in theplumbing valve section. Final connection to the equipment provided or installed under theHVAC Section shall be made by the HVAC Contractor. Final connection shall includeadditional valves, strainers, control valves, check valves, miscellaneous connections, etc. asshown on mechanical details, mechanical drawings, or as specified herein.

D. Each pipe length shall have the manufacturer's name cast, stamped, or rolled on.

E. Each fitting shall have the manufacturer's symbol and pressure rating cast, stamped, or rolledon.

. 1.2 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification.

B. Federal Specifications (Fed. Spec.):

L-C-530C ................... Coating, Pipe, Thermoplastic ResinL-T-1512A ................... Tape, Pressure Sensitive Adhesive, Pipe Wrapping0-C-114B(2) ................ Calcium Hypochlorite, Technical0-S-602E .................... Sodium Hypochlorite SolutionBB-C-120C ................. Chlorine, Technical, LiquidWW-V-35C ................. Valve Ball Brass or BronzeWW-V-1967 ................ Valve, Butterfly (Threaded Ends And Solder Ends)

C. American National Standards Institute (ANSI):

American Society of Mechanical Engineers (ASME): (Copyrighted Society)

A11.21.1M-80 ............. Floor Drains ANSI/ASMEB16.3-85 ..................... Malleable Iron Threaded Fittings ANSI/ASMEB16.4-85 ..................... Cast Iron Threaded Fittings Classes 125 and 250 ANSI/ASMEB16.9-86 ..................... Factory-Made Wrought Steel Buttwelding Fittings ANSI/ASMEB16.11-80 ................... Forged Steel Fittings, Socket-Welding and Threaded ANSI/ASMEB16.12-83 ................... Cast Iron Threaded Drainage Fittings ANSI/ASME

is HVAC PIPE AND FITTINGS237000- 1


November 23, 2011

B16.15-85 ................... Cast Bronze Threaded Fittings ANSIASME

B16.18-84 ................... Cast Copper Alloy Solder-Joint Pressure Fittings ANSI/ASME

B16.22-89 ................... Wrought Copper and Copper Alloy Solder Joint Pressure FittingsANSI/ASME

B31.1 .......................... Pipe W eldingB31.8-86 ..................... Gas Transmission and Distribution Piping Systems ANSI/ASMEB40.1-85 ..................... Gauges-Pressure Indicating Dial Type-Elastic Element ANSI/ASME

D. American Society for Testing and Materials (ASTM):

A47-84 ........................ Ferritic Malleable Iron Castings Revision 1989A53-89 ........................ Pipe, Steel, Black And Hot-Dipped, Zinc-coated Revision A Welded and

SeamlessA74-87 ........................ Cast Iron Soil Pipe and FittingsA183-83 ...................... Carbon Steel Track Bolts and NutsA234-84 ...................... Pipe Fittings of Wrought Carbon Steel and Alloy SteelA312-89 ...................... Seamless and Welded Austenitic Stainless Steel PipeA395-99 ...................... Ferritic Ductile Iron Pressure Retaining CastingsA536-84 ...................... Ductile Iron CastingsA733-89 ...................... Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe

NipplesB32-89 ........................ Solder MetalB61-86 ........................ Steam or Bronze CastingsB62-86 ........................ Composition Bronze or Ounce Metal CastingsB75-86 ........................ Seamless Copper TubeB88-89 ........................ Seamless Copper Water TubeB152 ........................... Copper SheetB306-88 ...................... Copper Drainage Tube (DWV)B584-89 ...................... Copper Alloy Sand Castings for General Applications, Revision AB687-88 ...................... Brass, Copper, and Chromium-Plated Pipe NipplesC564-88 ...................... Rubber Gaskets for Cast Iron Soil Pipe and FittingsD2000-86 .................... Rubber Products in Automotive ApplicationsD2146-82 .................... Propylene Plastic Molding and Extrusion MaterialsD2447-89 .................... Polyethylene (PE) Plastic Pipe, Schedule 40 and 80, Based on Outside

DiameterD2564-89 .................... Solvent Cements for Poly (Vinyl Chloride) (PVC) Pipe Plastic Pipe and

FittingsD2665-89 .................... Poly (Vinyl Chloride) (PVC) Plastic Drain, Waste, and Revision A Vent

Pipe and FittingsD4101-82 .................... Propylene Plastic Injection and Extrusion Materials

E. American Water Works Association (AWWA):

C151-86 ...................... Ductile-Iron Pipe, Centrifugally Cast in Metal Molds or Sand-Lined Molds,for Water or Other Liquids

HVAC PIPE AND FITTINGS237000-2


November 23, 2011

C203-86 ...................... Coal-Tar Protective Coatings and Linings for Steel Water Pipelines -Enamel and Tape - Hot Applied

C606 ........................... Grooved and Shouldered JointsC651-86 ...................... Disinfecting Water MainsC701-88 ...................... Cold Water Meters-Turbine Type, for Customer Service

F. National Fire Protection Association (NFPA):

54-88 ........................... National Fuel Gas Code

G. American Welding Society (AWS):

A5.8-89 ....................... Filler Metals for Brazing

H. National Association of Plumbing - Heating - Cooling Contractors (PHCC):

National Standard Plumbing Code - 1990

I. Cast Iron Soil Pipe Institute (CISPI):

301-85 ........................ Hubless Cast Iron Soil and Fittings

J. International Association of Plumbing and Mechanical Officials (IAPMO):

Uniform Plumbing Code- 1988

IS6-82 ......................... Installation Standard

K. Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. (MSS):

SP-70-84 .................... Cast Iron Gate Valves, Flanged and Threaded Ends.

L. American Society of Sanitary Engineers (ASSE):

1003 ............................ Water Pressure Reducing Valves1010 ............................ Water Hammer Arresters1001-70 ...................... Pipe Applied Atmospheric Type Vacuum Breakers1013-88 ...................... Reduced Pressure Principle Backflow Preventers1015-88 ...................... Double Check Backflow Prevention Assembly1020-81 ...................... Vacuum Breakers, Anti-Siphon, Pressure Type

M. Factory Mutual (FM):

1680-89 ...................... Coupling Used in Hubless Cast Iron Systems for Drains, Waste and VentSystems.


Delaware County Community College Project # 177901246Marple Campus Renovation - Phase 2 100% Construction Documents

November 23, 2011

PART 2 - PRODUCTS

2.1 PIPING AND FITTINGS MATERIAL SCHEDULE

A. Piping systems shall be constructed of the following materials as scheduled below, subject toapproval by authorities having jurisdiction.

Systems Pipe Fittings Remarks

Relief valve discharge Type L hard drawn Cast bronze orpiping for water copper tubing with wrought coppersystems 95-5 tin antimony with solder joints

solder joints

Interior building Type L hard drawn Cast bronze or Provide dielectrichydronic heating copper tubing with wrought copper unions for ferrous tosystem piping 2 inches 95-5 tin antimony with solder joints non-ferrous pipeand smaller solder joints connections

Schedule 40 black Screwed cast ironsteel pipe. Standard H malleable ironweight above fittings10 inches

Interior building Schedule 40 black Welded steel Provide dielectrichydronic heating steel pipe. Standard fittings unions for ferrous tosystem piping weight above non-ferrous pipe2-1/2 inch and larger 10 inches connections

Interior building or Type L hard drawn Cast bronze or Fitting pressureabove ground domestic copper tubing with wrought copper rating per ANSIwater systems, 4 inches 95-5 tin antimony with solder joints B16.22, B16.18,and smaller (cold, hot & solder joints 125 lb. steam andhot water circulating 300 lb. steamsystems)

Schedule 40 black Victaulic flexible Permitted in areassteel pipe. Standard Style 75 or 77 or without ceilings only.weight above rigid style Not permitted in10 inches couplings with shafts.

grooved end pipe

Cooling coil condensate Type L hard drawn Cast bronze orpiping copper tubing with wrought copper

95-5 tin antimony with solder jointssolder joints



2.2 PIPE HANGERS AND SUPPORTS November 23,2011

iA General

1. Provide all required supports and hangers for the items included in the work. Hangerdesign and spacing shall conform to ANSI Code B 31.1.0 for Pressure Piping and theManufacturers' Standardization Society of the Valve and Fitting Industry (MSS) SP-58and SP-69, unless supplemented or modified herein.

2. Submit for approval product bulletins with figure numbers of supports, hangers andinserts proposed for the various conditions and services.

3. Supports shall secure pipes in place, prevent swaying and vibration, maintain requiredpitch by proper adjustment, and provide free expansion and contraction. Design supportsto suit the loading and service, and not over stress the building structure.

4. Hanger rods shall be threaded 1-1/2 inch on each end or all-threaded cadmium plated orgalvanized steel. All hangers, rollers, and supports that are not plated shall be factorypainted with a red oxide primer and black enamel finish.

5. Specified bracket clamp and rod sizes are minimum size. Support and hanger designshall include a safety factor of 5.

6. Where several pipes 4 inches in diameter and smaller can be installed in parallel at thesame level, approved type trapeze hangers may be used in lieu of separate clevis hangers,with suspension rods having double nuts and securely attached to the building structure inan approved manner. Brace trapeze hangers to prevent motion due to expansion andcontraction of pipe. Support individual pipes on trapeze by saddles and rollers. Fortrapeze hanger spacing, use the maximum support spacing listed for the smallest pipe onthe trapeze.

7. Plastic coated hangers and clamps shall be provided for uninsulated brass or copperpipes, unless shields are provided between hangers or clamps and uninsulated brass orcopper pipes.

8. Provide all supplemental steel required for support of pipes other than steel shown on thestructural drawings.

9. Do not hang one pipe from another pipe, conduit, or ductwork.

10. Do not use perforated band iron, wire, or chains as pipe hangers.

11. Support piping as close as practical to heavy load concentrations such as vertical runs,branch connections, valves, and other pipe accessories such as air separators andstrainers.

a. Locate supports adjacent to both sides of control valves or pipe sections shown tobe removable.

b. Locate supports adjacent to branch shutoff valves to permit removal of branchpiping without the installation of temporary supports.

c. Support piping on at least one side and adjacent to each change in direction.

d. Provide additional supports as specified elsewhere when grooved pipe constructionis employed.

HVAC PIPE AND FITTINGS237000 - 5


November 23, 2011

12. Hangers for insulated pipes shall be sized to clear the outside diameter of the insulation,unless otherwise noted.

13. All supports and hangers for horizontal piping shall be provided with a means of verticaladjustment after erection. All turnbuckles shall be provided with one lock nut. All rodconnections to hangers and attachment devices shall be provided with two (2) nuts.

14. Inserts for pipe hangers shall be of a type that does not interfere with structuralreinforcing and does not displace excessive amounts of concrete.

15. Piping located near floors which can be supported from floor or walls shall be providedwith approved floor stands, wall brackets, roller supports, masonry piers or similar items.

16. Resilient hangers and isolation devices shall be provided on piping connected to rotatingequipment including pumps and air handling units and on other piping which may vibrateand create audible noise. See Section 230570, Vibration Isolation, for additionalrequirements concerning vibration isolation at pipe supports.

17. Additional hangers or supports shall be provided, as required, to stabilize and re-supportany existing piping that is to remain and be reused in areas affected by demolition.

18. Vertical piping shall utilize riser clamps specifically designed for piping.

B. Pipe Hanger Schedule

Manufacturers' Model NumbersHanger Type F&S F&M Grinnell Central Iron

360 shield, split 981 --- --- 548Beam Clamp 55 282 218 39Multi-J hook blade 120 --- --- 208Clevis hanger 86 239 260 10180 degree shield 980 80 167 550Rigid trapeze 710 --- Std. 46 551U-bolt 37 176 137, 137C 98HAdj. steel pipe stanchion 421 291 259 71Welded steel bracket 800, 801 151,155 195,199 195,199Riser clamp 91,93,94 241 261,261C 37, 261Pipe rest 92, 925 --- --- 552Base elbow support 720, 721 --- -- 67, 68Double bolt pipe clamp 89 261 295Welded beam attachment 966 --- 66Insert 180A, 180B 178 280 Series 100,101Cont. slotted insert 150A, 150B 190 --- 50Underground pipe hanger 275 --- --- 600A

HVAC PIPE AND FITTINGS237000 - 6


November 23, 2011

C. Piping 6 inches and smaller: Piping 6 inches and smaller shall be supported by the followinghangers and supports referred to in MSS-SP69.

1. All high pressure steam and condensate pump discharge piping shall be supported onType 43 adjustable pipe roller hangers or Type 46 adjustable pipe roller and basesupports and Type 39 saddles.

2. Instrument air piping shall be supported with copper-plated Type I clevis hangers orType 8 riser clamps.

3. All cold water piping shall be supported with Type 40 protection shields and Type 1clevis hangers.

4. All other piping shall be supported by Type 1 adjustable steel clevis hangers.

5. Hangers for piping with insulation shall be equipped with insulation inserts andprotection shields. Refer to Section 237070, HVAC Pipe and Equipment Insulation, foradditional requirements. Support piping in accordance with the insert manufacturer'srecommendations.

6. Hangers for piping 4 inches and smaller with insulation shall be equipped with Type 40protection shields. Hot service piping shall be equipped with calcium silicate insulationinserts.

7. All 6 inch cold service piping shall be provided with insulation inserts or oak blocking ofsquare dimension equal to the insulation thickness specified and 12 inches long. Inaddition, Type 40 protection saddles shall be provided.

8. All 6 inch hot service piping shall be supported on Type 39 protection saddles. Pipesaddles may not be used on piping with insulation requiring a vapor barrier.

9. Support plastic piping in accordance with the piping system manufacturer'srecommendations for the intended service based on the expected fluid temperatures.

10. All copper piping shall be supported by copper or plastic clad hangers or shall beprotected by plastic non-conducting spacers to prevent dielectric corrosion.

11. All vertical piping shall be supported at floor levels with Type 8 riser clamps. Piping2-1/2 inches and larger shall be provided with a minimum of two (2) shear lugs installedin accordance with PFI Standard ES-26. Support locations shall be selected to permituniform loading, provision for expansion, or to suit space limitations. The riser clamps atexposed locations shall be of such design as to avoid creating a hazardous or unsightlycondition and staying within the space limitations.

12. Pipe guides shall be provided whenever piping has insufficient physical strength tomaintain alignment with the force of lineal expansion applied.

13. The base of all piping at circulating pumps shall be Type 52 variable spring base supportsor with stanchions. Pipe stanchions shall be a minimum of 1/3 to 1/2 the nominal pipediameter of the pipe being supported and 1 inch minimum. The base plate shall be aminimum 1/4 inch thick and its size shall be selected for fastening to the floor with aminimum of two (2) 3/8 inch bolts.

14. Piping 4 inches and smaller supported from the steel structure shall be supported byType 23 beam clamps or by inserts and/or expansion bolts in the floor structure above.



November 23, 2011

15. All 6 inch piping and trapeze hangers where loads in excess of 200 pounds areanticipated shall be supported by Type 22 welded beam attachments.

16. Piping along walls shall be supported by Type 33 brackets with drilled horizontal legs forfastening standard hangers and hanger rods, and vertical legs shall be fastened to the wallwith at least two (2) fasteners.

17. Where several pipes can be installed in parallel at the same level, provide trapeze hangersconstructed of uni-strut or steel angle suspended by hanger rods. Brace trapeze hangersto prevent motion due to expansion and contraction of the pipe. Support individual pipesby hangers or rollers.

18. Support spacing for horizontal steel piping. The support spacing listed below is themaximum normal spacing, and does not reduce the need for additional hangers andsupports when specified elsewhere.

Steel Pipe Size Minimum Rod Size Maximum Support Spacing

1-1/4 inches and smaller 3/8 inch diameter 7'- 0"

1-1/2 inches 3/8 inch diameter 9' - 0"

2 inches 3/8 inch diameter 10'-0"

2-1/2 inches 1/2 inch diameter 11-0"

3 inches 1/2 inch diameter 12' - 0"

4 inches 5/8 inch diameter 14'- 0" 0



19. Support spacing for horizontal copper piping. The support spacing listed below is themaximum normal spacing, and does not reduce the need for additional hangers andsupports when specified elsewhere.

Copper Pipe Size Minimum Rod Size Maximum Support Spacing

3/4 inch and smaller 3/8 inch diameter 5' - 0"1 inch 3/8 inch diameter 6' - 0"1-1/4 inches 3/8 inch diameter 7' - 0"1-1/2 inches 3/8 inch diameter 8' - 0"2 inches 3/8 inch diameter 8' - 0"2-1/2 inches 1/2 inch diameter 9' - 0"3 inches 1/2 inch diameter 10'-0"


0HVAC PIPE AND FITTINGS

237000 - 8

Delaware County Community College Project # 177901246

Marple Campus Renovation - Phase 2 100% Construction DocumentsNovember 23, 2011

20. Support spacing for horizontal PVC piping. Support spacing listed below is themaximum normal spacing, and does not reduce the need for additional hangers and

supports when specified elsewhere. Additionally, provide support at every pipe joint.

PVC Pipe Size Minimum Rod Size Maximum Support Spacing

3/4 inch and smaller 3/8 inch diameter 5' - 0"

1 inch 3/8 inch diameter 5' - 0"

1-1/4 inches 3/8 inch diameter 5' - 0"1-1/2 inches 3/8 inch diameter 6' - 0"2 inches 3/8 inch diameter 6' - 0"2-1/2 inches 1/2 inch diameter 7'- 0"


4 inches 1/2 inch diameter 7' - 0"6 inches 5/8 inch diameter 8' - 0"

NOTE: The above table is based on Schedule 40 PVC not exceeding 1 00°F service

temperature. For other pipe wall thicknesses and service temperatures, consult the

manufacturer's published recommendations.

21. locations shall be of such design as to avoid creating a hazardous or unsightly condition

and staying within space limitations.

2.3 PIPE EXPANSION PROVISIONS

A. Provide expansion loops, expansion joints, and/or ball joints to accommodate pipe expansion.

In addition to expansion devices, make provision in the piping and connections to eliminate

stress on equipment connections.

B. Expansion devices shall be as specified in Section 237020, HVAC Piping Specialties.

2.4 FLEXIBLE PIPE CONNECTIONS

A. Pipe connections to all pumps, chillers, air handling units, and other rotating equipment shall be

made with flexible pipe connections.

B. Pipe connections to integral face and bypass coils shall be made with flexible pipe connections.

C. Flexible pipe connectors shall be as specified in Section 230570, Vibration Isolation.

2.5 PIPE SLEEVES AND ESCUTCHEON PLATES

A. Provide sleeves for piping passing through roofs, floors, ceilings, walls, partitions, air handling

equipment, structural members, and other building parts.

B. Sealant shall be equivalent to Dow Coming 795 Silicone Sealant for general purpose use and

Dow Coming 786 Mildew Resistant Silicone Sealant for Kitchen, Food Preparation, Dining

areas, and wet areas. Prime sleeves in accordance with manufacturer's recommendations.

HVAC PIPE AND FITTINGS237000 -9


November 23, 2011

C. Sealant in one-hour and two-hour walls and one-hour and two-hour floors shall be equivalent toDow Coming Fire Stop System Sealants and Foams. Sealants and foams shall be UL listed andinstalled in accordance with manufacturer's recommendations.

D. Schedule of Sleeve Materials

Sleeve Type Sleeve Material

1 18 gauge galvanized steel2 Std. weight galvanized steel pipe

3 Std. weight galvanized steel pipe with a continuously welded water stop of1/4 inch steel plate extending a minimum of 2 inches from the outside of thesleeve. (F&S Mfg. Co. Figure 204 or approved equal.)

4 Cast iron pipe sleeve with center flange. (James B. Clow & Sons No. F-1430 &F-1435, or approved equal.)

5 Std. weight galvanized steel pipe with flashing clamp device welded to pipesleeve or watertight sleeves. (Josam 1870-A2 with oakum and lead caulkingas required, or approved equal.)

6 Metal deck and wall sleeves.

E. Escutcheon Plates

1. Schedule of Escutcheon Plate Materials

Location Escutcheon Plate Material 4

Finished spaces Anodized aluminum or chrome-plated brass

Unfinished spaces Plain brass, cast iron or aluminum

2.6 LINK SEALS

A. Provide a sealing element made of synthetic rubber material, compounded to resist aging,ozone, sunlight, water and chemical action, and having a low temperature flexibility andresistance to high temperature environments. Elements shall be suitable for temperature rangesof minus l00F to 600'F.

B. Bolts and metal parts shall be made of carbon steel and zinc phosphate plated to resistcorrosion. Pressure plates shall be cathodic-type made of plastic.

C. The seals shall be constructed so as to be air tight in aboveground installations, and to providewatertight sealing in below grade installations.

D. Seals shall be manufactured by Thunderline Corporation or approved equivalent.

HVAC PIPE AND FITTINGS237000- 10

Delaware County Community College Project #177901246

Marple Campus Renovation - Phase 2 100% Construction Documents

2.7 HVAC PIPING SYSTEM PRESSURE CLASSIFICATION November 23, 2011

A Piping, fittings, components, and equipment for the various HVAC piping systems shall meet

the following pressure requirements:

ComponentOperating Pressure

HVAC Piping System Pressure Rating Drawing Symbol

1. Heating water supply & return 100 125 HWS, HWR

2. Systems not listed 100 125

2.8 PIPE FLASHING FITTINGS

A. Pipes passing through roof construction shall be provided with roof curb and piping portal as

specified in Section 230580.

2.9 PIPING WELDING

A. Refer to Basic Materials and Methods, Section 230100, for welding requirements on piping.

PART 3 - EXECUTION

. 3.1 GENERAL

A. The drawings schematically indicate the size and location of piping. Piping system layout shall

be modified as required to meet field conditions and facilitate coordination among contractors at

no additional cost. Piping shall conform to the latest ASA code for pressure piping. Unless

otherwise noted, all piping, valves, and associated fittings shall be concealed behind walls,above ceilings, or below floors.

B. Provide adequate provision for expansion and contraction in portions of the piping systems, to

prevent undue strains on piping and connected equipment.

C. Provide approved bolted, gasketed flanges for each piece of equipment to permit easy

connection and disconnection. Screwed unions with steel faces may be used on piping 1 inch

and smaller.

D. Inlet/outlet piping connections to coils and equipment shall be provided with offsets and shutoff

valves arranged such that equipment can be serviced or removed without dismantling the pipe.

E. Converging and diverging bullhead tee's will not be permitted in piping systems.

F. "T" drill type fittings will not be permitted in piping systems.

G. If, after systems are in operation, any coils or other apparatus become stratified or air-bound,they shall be repiped with necessary fittings, air vents or vacuum breakers at no additional cost.

If connections are concealed behind construction, the responsible Contractor shall bear the cost

of any demolition and refinishing construction required.



November 23, 2011

H. Pitch water piping up in direction of flow to ensure adequate flow without air binding and toprevent noise and water hammer. Branch connections to mains shall be made in such a manneras to prevent air trapping and prevent free passage of air. Mains shall be laid out to meet fieldconditions, maintain adequate headroom and clear work of other Contractors.

I. Miscellaneous drains, vents, reliefs, equipment/tank overflows and similar devices shall be runto the nearest floor drain or roof drain. Provide drain valves wherever required for completedrainage of water system piping, including the system side of pumps.

J. Grooved Joint Installation: All grooved couplings, fittings, valves, and specialties shall be theproducts of a single manufacturer. Grooving tools shall be of the same manufacturer as thegrooved components. The gasket style and elastomeric material (grade) shall be verified assuitable for the intended service as specified. Gaskets shall be manufactured by the groovedcoupling manufacturer. Grooved ends shall be clean and free from indentations, projections,and roll marks in the area from pipe end to groove.

K. Vic Press 3 0 4 TM Joint Installation: Pipe shall be certified for use with the Vic Press 304 TMsystem. Pipe shall be square cut, +\- 0.030", properly deburred and cleaned. Pipe ends shall bemarked at the required location using a manufacturer-supplied gauge, to ensure full insertioninto the coupling or fitting during assembly. Use a Victaulic 'PFT' series tool with the propersized jaw for pressing.

L. Any piping passing through roof construction shall be arranged to provide a minimum of12 inches clearance from walls or other obstructions so as to permit proper flashing. Set pipeflashing fittings at a suitable level above the roof to permit proper termination of flashing.

M. Provide hose drain connections on water systems downstream of floor main shut off valves.

N. Provide dielectric fittings equivalent to EPCO Sales at all ferrous to non-ferrous pipeconnections.

3.2 CONNECTIONS TO EXISTING WORK

A. Plan installation of new work and connections to existing work to insure minimum interferencewith regular operation of existing facilities. Submit to the Owner for approval, date schedule ofnecessary temporary shutdowns of existing services. Shutdowns shall be made at such times asshall not interfere with regular operation of existing facilities and only after written approval ofthe Owner. To insure continuous operation, make necessary temporary connections betweennew and existing work. Costs resulting from temporary shutdowns shall be borne by thisContractor.

B. Connect new work to existing work in neat and approved manner and in accordance with localcodes and regulations. Restore existing work disturbed to original condition.

C. Submit shop drawings of materials, method of connection and necessary temporary connectionsfor approval before installation.


Delaware County Community College Project #177901246Marple Campus Renovation - Phase 2 100% Construction DocumentsO November 23, 2011

3.3 PIPING SYSTEM PRESSURE TESTS

A. The following procedures shall be observed for piping system pressure tests:

I. Preliminary testing, notification of inspectors and Contractor's responsibilities asspecified in Section 230100, paragraph "CODES, PERMITS AND INSPECTIONS" shallbe observed.

2. Take all due precautions to prevent damage to the building and its contents that may beincurred by such tests; repair or make good any damage caused by the tests at noadditional cost to the Owner.

3. Tests shall apply full test pressure to the piping for a sufficient period of time to detectleaks and defects.

4. Tests shall be conducted prior to the installation of any required fitting insulation. Ifdelicate control mechanisms, not including control valves, are installed in the piping, theyshall be removed to prevent shock damage.

5. The section of piping to be tested shall be brought up to the specified test pressure. If thetest pressure falls more than the specified amount during the test period, the point ofleakage shall be found, repaired and the test repeated. This procedure shall be repeateduntil the piping system has been proved absolutely tight.

6. Leaks shall be repaired by removing the valve, fitting, joint or section which is leakingand reinstalling new materials and joints as specified. Use of mastic, "no-leak"compounds or other temporary means of repairing leaks shall not be permitted.

7. System pumps, heat exchangers, etc., shall not be used until final flushing is done.Provide necessary temporary pumps required for flushing.

3A HYDRONIC HEATING WATER SYSTEMS

A. Hydronic Heating Water Systems Flushing

I. After piping installation is complete but before final connections are made to theequipment, control valves, etc., thoroughly flush the supply and return piping with freshwater. Flushing shall continue until clear water flows from drains or for two hours,whichever is longer.

2. After clear water flushing, operate pumps (provide temporary pumps) for a minimum of8 hours with a "start-up" fine mesh strainer. Clean strainer after 8 hours of operation thenoperate pump for 24 hours. Remove start-up strainer, replace bypass filter, and cleanremaining strainers.

3. Pump flow rate and head shall be equal to flow rate required for the installed system.Water systems (hot water and chilled water) shall not be connected until flushing iscomplete. Notify Architect 5 days before temporary pumps are started.

0HVAC PIPE AND FITTINGS

237000- 13



B. Hydronic Heating Water Water Systems Pressure Tests

1. Test piping systems hydrostatically using water not exceeding 1 00°F. Conduct tests in

accordance with the requirements of ANSI B3 1.1 and as follows:

a. Test the piping after the lines have been cleaned and prior to applying insulation

and covers to fittings.

b. For piping systems with pressures below 175 psig, test piping systems at a pressure

equal to twice the system's operating pressure or 50 psig, whichever is greater. For

piping systems with pressures 175 psig and above, test piping systems at 350 psig.

c. Prior to testing, remove or valve-off from the system gauges, traps, and other

apparatus which may be damaged by the testing.

d. Install calibrated test pressure gauge in the system to observe any loss in pressure.

e. Maintain the required test pressure for a sufficient length of time to enable an

inspection of joints and connections.

f. Tests shall be performed after installation of the piping systems and prior to

acceptance of same.

3.5 PIPE HANGERS AND SUPPORTS

A. Pipe Hanger Support Schedule

Building Construction Pipe Support Method

Poured concrete floor Galvanized steel inserts, and/or fishplates of sufficient area to support

slabs twice the calculated dead load.

Building structural steel Beam attachments and similar devices.

Precast concrete floor Fishplates of sufficient area to support twice the calculated dead load

slabs and approve type specialty hanger accessories manufactured for the

specific purpose of attaching to precast floors.

Metal deck floor slabs Galvanized steel inserts and/or fishplates of sufficient area to support

with concrete fill twice the calculated dead load, and approved type specialty hanger

accessories manufactured for the specific purpose of attaching to

metal deck floors.

Existing concrete slabs "Phillips" or "Hilti" expansion bolts and shields for piping 4" and

smaller, with main supports welded to structural steel at maximum

20 feet on center 4" x 4" x 3/8" thick clip knee angles with 3/4"

expansion bolt in shear (horizontal) and supporting rod at 900 from

anchor bolt for piping greater than 4", attached to concrete beams or

columns.

3.6 PIPE SLEEVES

A. Install sleeves in time to permit construction progress as scheduled.

B. Grout sleeves to building structure for watertight fit. 4




C. Schedule

of Sleeve Lengths

Location Sleeve Length

Floors Equal to depth of floor construction and at least 1 inch above finished

floor construction. In waterproof floor construction and equipment

rooms, sleeves shall extend a minimum of 2 inches above finished

floor construction

Roofs Equal to depth of roof construction including insulation

Walls and Partitions Equal to depth of construction and terminated flush with finished

surfaces

D. Schedule of Sleeve Caulking and Packing

Caulking/Packing Type Caulking/Packing Requirements

A Space between pipe and sleeve shall be packed with oakum and

caulked watertight with lead.

B Space between pipe or pipe covering and sleeve shall be caulked

with an incombustible permanently plastic waterproof, non-staining

compound leaving a smooth, finished appearance.

C Verminproofing - space between pipe and sleeve shall be packed

with industrial felt or fiberglass caulked at both ends with sealant

according to manufacturer's recommendations. Verminproofinsulation shall be minimum 1 inch thickness and shall be sections of

foam glass as long as sleeves.

E. Schedule of Sleeve Applications

Sleeve Type Sleeve TypeThru Fire Thru Non-Fire Sleeve CaulkingRated Rated and Packing

Location Construction Construction Type

Membrane water-proof floor, roof and 5 5 C

wall construction

Non-membrane waterproof floor, roof 5 5 C

and wall construction where flashing isrequired

Interior walls, partitions, and floors 2 1 or 2 C

Exterior walls -- 3 or 4 C

Cellular metal deck floors 2 6 B

Precast concrete floor with poured -- 1 B

concrete topping (NOTE: sleeves withflat flanges or guides which rest on top

* of precast slab required


Delaware County Community College Project #177901246Marple Campus Renovation - Phase 2 100% Construction DocumentsNovember 23, 2011

3.7 PIPE FLASHING FITTINGS

A. Any pipe passing through roof construction shall be arranged to provide a minimum of12 inches clearance from walls or other obstructions so as to permit proper flashing.

3.8 DRIP PANS FOR PROTECTION OF ELECTRICAL EQUIPMENT

A. Examine the drawings and in cooperation with the Electrical Contractor confirm the finallocation of electrical equipment to be installed in the vicinity of piping. Plan and arrangeoverhead piping no closer than 2 feet from a vertical line to electric motors and controllers,switchboards, panel boards, or similar equipment. Piping is not permitted in electric equipmentrooms, transformer rooms, switchgear rooms, nor telephone gear rooms.

B. Where the installation of piping does not comply with the requirements of foregoing paragraph,where feasible, the piping shall be relocated.

C. Where piping cannot be relocated, furnish gutters as follows:

I. Provide and erect a gutter of 16 ounce cold rolled copper or heavy galvanized steel, underevery pipe which is within 2 feet from a vertical line to any motor, electrical controllers,switchboards, panel boards, or the like.

2. Each gutter shall be soldered and made watertight, properly suspended and carefullypitched to a convenient point for draining. Provide a 3/4 inch drain, with valve asdirected, to nearest floor drain or slop sink, as approved.

3. In lieu of such separate gutters, a continuous protecting sheet of similar constructionadequately supported and braced, properly rimmed, pitched and drained, may be providedover any such motor, and extending 2 feet in all directions beyond the motor, over whichsuch piping has to run.

END OF SECTION 237000



November 23, 2011

SECTION 237011 - LIMITED CHEMICAL TREATMENT SYSTEMS

PART 1 - GENERAL

1.1 CHEMICAL TREATMENT SYSTEMS

A. The following work consists of providing all labor, material and equipment for cleaning andflushing piping systems and providing water treatment chemicals and miscellaneous equipmentfor piping systems.

B. Provide all chemicals required for cleaning and flushing the systems affected by the

construction, for initially filling these systems, and for maintaining these systems at properconcentration levels required for effective, efficient operation of the mechanical equipment for aperiod of one year after the acceptance of the project by the Owner. Fouling factors shall bemaintained at 0.0005 on all heat exchange surfaces and algae shall be maintained at levels of noappreciative build-up.

1.2 EXISTING SYSTEM CONNECTION

A. Utilize existing chemical treatment system and verify that proposed chemicals for chemicaltreatment are compatible with existing chemical treatment system chemicals.

PART 2 - PRODUCTS

. 2.1 QUALITY ASSURANCE

A. The HVAC Contractor shall engage an independent water treatment company, Diversey WaterTechnologies Inc., as required regarding existing system requirements.

PART 3 - EXECUTION

3.1 INITIAL CLEANOUT SPECIFICATION - HOT WATER HEATING SYSTEMS

A. Screens/strainers shall be in place and chemical feed system installed before initial cleanoutbeings.

B. Fill system with water and simultaneously add manufacturer's non-foaming chemical detergentequal to Nalco 2567 to recommended dosage based on total system capacity through chemicalfeed system.

C. Circulate water for 24 to 36 hours.

D. Immediately after recirculation, so that removed and suspended foulants will not resettle, drainsystem.

E. Remove, clean, and replace all strainers.

LIMITED CHEMICAL TREATMENT SYSTEMS237011-1


November 23, 2011

F. Immediately after steps 4 and 5 above, so as to prevent corrosion from taking place on emptypiping, fill the system adding 1/4 the theoretical dosage of the selected treatment, recirculate fora minimum of 4 hours, maximum of 24 hours. Then drain or purge system.

G. Immediately after step 6, refill system while adding total required dosage of selected treatmentequal to Nalco 2536. Continue to recirculate for a minimum of 24 hours to allow total filmformation.

H. Provide certification by chemical treatment representative that system is properly cleaned andready for startup.

3.2 CHEMICAL TREATMENT PROGRAM - HOT WATER HEATING SYSTEMS

A. Provide initial fill chemicals plus provide chemicals and maintain recommended chemicallevels for a period of one year.

B. Inhibitor

1. A liquid formulation of borate and nitrate containing a "scale modified" and colorconcentration indicator shall be used. Nitrite concentrations shall be 1500-3000 ppm inhot water heating system.

C. pH Control

1. Must be incorporated in inhibitor formulation using borate as the pH buffer. The pHshall be maintained between 7.0 and 9.0.

D. Guarantee

1. Protect various dissimilar materials of construction.

2. Corrosion rate of ferrous metals shall not exceed 1.0 mils penetration per year.

3. Treatment system shall not permit fouling to cause equipment capacity reduction beyondthe allowed 0.0005 "fouling factor."

3.3 TESTING EQUIPMENT

A. Testing equipment shall be provided which shall include the following:

1. Reagents and apparatus for determination of pH and alkalinity levels.

2. Reagents and apparatus for determination of treatment levels.

3. Any special equipment required for proper control or test of chemical treatment.


LIMITED CHEMICAL TREATMENT SYSTEMS237011 -2


November 23, 2011

SECTION 237020 - HVAC PIPING SPECIALTIES

PART 1- GENERAL

1.1 GENERAL

A. Provide HVAC piping specialties as shown on the drawings and specified herein.

1.2 PRESSURE GAUGES

A. Provide pressure gauges at suction and discharge connections to pumps and as indicated on thedrawings.

1.3 THERMOMETERS

A. Provide thermometers at inlets and outlets of each boiler, heat exchanger, chiller, and asindicated on the drawings.

1.4 STRAINERS

A. Provide strainers in the piping upstream from automatic control valves, backflow preventers,regulating valves, and as indicated on the drawings.

. 1.5 EXPANSION JOINTS, ANCHORS, AND GUIDES

A. Provide expansion joints, anchors, and guides as shown on the drawings and specified herein.

1.6 FLOW METERS

A. Provide flow meters as shown on the drawings and specified herein.

1.7 PRESSURE AND TEMPERATURE TEST PLUGS

A. Provide pressure and temperature test plugs as shown on the drawings and specified herein.

1.8 MANUAL AIR VENTS

A. Provide air vents as shown on drawings and specified herein.

1.9 AUTOMATIC AIR VENTS

A. Provide automatic air vents in accessible location at high point of each system (supply andreturn piping).

1.10 HIGH CAPACITY AIR VENTS

A. Provide high capacity air vents above the cold water fill piping connections to the air separatorsserving the hot water heating system and the chilled water system.

HVAC PIPING SPECIALTIES237020- 1


November 23, 2011

1.11 DRAIN VALVE AND CAP

:4. Provide drain valve and cap at the bases of risers, downstream of flow shut off valves, as shownon drawings and specified herein.

1.12 BACKFLOW PREVENTERS

A. Provide backflow preventers in the makeup water piping to each boiler, evaporative cooler,cooling tower, chiller, expansion tanks, and as shown on the drawings and specified herein.

1.13 PRESSURE REDUCING VALVE

A. Provide water pressure reducing valves in the water makeup piping to the boiler, chiller, coolingtower, evaporative cooler, expansion tanks, and as shown on the drawings and specified herein.

1.14 PRESSURE RELIEF VALVES

A. Provide ASME rated pressure relief valves as indicated on the drawings and specified hereinbased on each heating system capacity.

PART 2 - PRODUCTS

2.1 GENERAL

A. Refer to Section 15700 for component and equipment ratings. All components, fittings,equipment, coils, specialties, etc., shall meet the component pressure rating listed.

2.2 PRESSURE GAUGES

A. Pressure gauges shall have 4-1/2 inch diameter aluminum cases, no back flange, and removablechrome slip ring. Finish shall be black enamel. Gauge dial shall be white coated with blackfigures, gradations, and micro adjustable. High grade shutoff cocks shall be provided betweengauge and piping to permit gauge removal while system is under pressure. Gauges shall becapable of reading to approximately twice the working pressure. Accuracy: 1 percent.

B. Product: Weiss Instruments Series UG-1 Type AN; Ashcroft Type 1279; Trerice No. 50OXSeries, Weksler EA14.

2.3 THERMOMETERS

A. Thermometers shall be 9 inch scale, red-reading organic spirit filled thermometers with castaluminum case and clear glass window, and shall read degrees Fahrenheit. Thermometers shallbe adjustable angle type, with 6 inch stem and 2-1/2 inch brass extension neck separable socket.Scale range shall be 30'F - 240'F with 2°F scale divisions.

B. Product: Weiss Instruments Industrial Thermometer; Trerice Industrial Thermometer,Weksler AS5H-9.

HVAC PIPING SPECIALTIES237020-2


Marple Campus Renovation - Phase 2 100% Construction Documents2.4 STRAINERS November 23, 2011

A. Strainers up to 4 inches for water and for steam shall be "Y" type, full pipe size and fitted with

blow-off ball valves. Basket screens shall be brass, with perforations suitable for intended

service.

B. Strainers over 4 inches shall be basket strainers, full pipe size and fitted with blow-off gate

valve. Basket screens shall be brass, with perforations suitable for intended service.

C. Product:

1. "Y" Type: Mueller No. 11 or Mueller No. 758; Watts No. 77S or Watts No. 77F-D;

Sarco Type IT or Sarco IF-125.

2. Basket Type: Mueller No. 165; Sarco 528-B.

3. UPMC Approved Manufacturers: Armstrong, Boyston, and Conbraco.

2.5 EXPANSION JOINTS, ANCHORS AND GUIDES

A. Expansion joints shall be Metraflex Model HP for piping to 4 inches and Metraflex Model MN

with Model MPC Connector for larger piping or approved equal. Expansion joints shall besuitable for 150 psig operation.

B. Ball joints shall be Standard Series (threaded) or Type N (welded) by Aeroquip/Barco or

* approved equivalent.

C. Anchors shall be Metraflex Co., Model PAI, or approved equivalent.

D. Guides shall be Metraflex Co., or approved equivalent.


A. Test plugs shall be a 1/4 inch MPT fitting to receive either a temperature or pressure probe with

a 1/8 inch OD. Fitting shall be solid brass with two valve cores of Nordel (maximum 275°F),fitted with a color coded and marked cap with gasket and shall be rated at 1,000 psig. Fittings

shall be Peterson Equipment Company, Incorporated, Pete's Plug, or approved equal.

B. Provide two test kits with pressure gauge and thermometer. Pressure gauges shall have 0-50 psi

dial range, and shall have adaptor with 1/8 inch probe of 304 stainless steel and union nut for

use with pressure and temperature test plug. Thermometers shall have 0' to 220'F range. Testkits shall be Peterson Equipment Company, Incorporated, Series 1500 Test Kit, or approvedequal.

2.7 MANUAL AIR VENTS

A. Air vents for terminal heating units, unit heaters, finned tube radiation, etc., shall be 1/8 inch

male screwdriver type manual air vents suitable for system pressure.

B. Air vents for air handling unit coils shall be 1/4 inch petcocks.



November 23, 2011

2.8 AUTOMATIC AIR VENTS

A. Automatic air vents shall vent automatically with float principle; bronze body and nonferrousinternal parts; 150 psig working pressure (300 psig for chilled water system); 240 deg Foperating temperature; with NPS 1/4 discharge connection and NPS 1/2 inlet connection;equivalent to Spirax Sarco Model 13WS or 13WHS depending on system pressure.

2.9 HIGH CAPACITY AIR VENTS

A. Provide float actuated high capacity air vents designed to purge free air from the system andprovide shutoff at pressures up to 150 psig at a maximum temperature of 250 degrees F. Thedesign of the high capacity air vents shall prevent air from entering the system if systempressure should drop below atmospheric pressure. The high capacity air vents shall purge freeair at pressures up to 150 psig during normal system operation. The high capacity air ventsshall be constructed of cast iron and fitted with components of stainless steel, brass and EPDM.

B. High capacity air vents shall be ITT Bell & Gossett Model 107A or approved equivalent bySpriax Sarco or Armstrong International.

2.10 DRAIN VALVE AND CAP

A. Drain valve shall be equivalent to Watts B-6000-CC 3/4 inch boiler drain valve.

B. Drain valve cap shall be brass gasketed cap capable of withstanding continuous full linepressure.


A. Provide backflow preventers in boiler, cooling tower, expansion tank, evaporative cooler, andwater make-up piping. The assembly shall consist of a pressure differential relief valve locatedin a zone between two positive seating check valves and captured springs. Back-siphonageprotection shall include provision to admit air directly into the reduced pressure zone via aseparate channel from the water discharge channel. The assembly shall include two tightlyclosing shutoff valves before and after the valve and test cocks. Backflow preventers shall beWatts No. 909 Series or approved equivalent. Provide drain air gap fitting and drain line todrain.

2.12 PRESSURE REDUCING VALVE

A. Pressure reducing valve in the water make-up pipe shall be Watts Regulator Company No. U5water reducing valve or approved equivalent. Maximum temperature: 160'F; maximum initialpressure: 300 psig; reduced pressure range shall be from 25 to 75 psig.

2.13 PRESSURE RELIEF VALVES

A. Pressure relief valves shall be Watts ASME rated pressure safety relief valves of bronze bodyconstruction with test lever. Model number and size to be based upon pressure setting andrelieving capacities as noted on the drawings.



O November 23, 2011

PART 3 - EXECUTION

3.1 GAUGES

A. Gauges shall be installed such that they are easily read from the normal observation point.

3.2 THERMOMETERS

A. Install thermometers in oversize pipe tee and nipple.

B. Thermometers shall be installed such that they are easily read from a normal observation point.

3.3 STRAINERS

A. Strainers shall be installed such that they are accessible for maintenance and inspection.

B. Strainers shall be installed in a horizontal (or vertical downward) run of pipe. Strainers shall bearranged so as to permit the blowing out of accumulated dirt, and to facilitate removal andreplacement of strainer screen without disconnecting from piping system.

C. Valved dirt blow-out connections for strainers 2-1/2 inches and larger shall be installed suchthat the valve is located 6 inches to 12 inches below the strainer. Blow-out connections shall beterminated in an approved manner, at a point where there shall be no risk of flooding ordamage.

D. After the piping systems have been flushed and prior to releasing the system to the Owner,strainers shall be removed, cleaned, and reassembled.


A. Provide pressure and temperature test plugs where indicated on the drawings and one pair atevery main to riser connection point. For this project, provide a minimum of 2 pair ofpressure and temperature test plugs and main to riser connection points.

3.5 AUTOMATIC AIR VENT

A. Provide vent in accessible location at top of system to allow for maintenance.


A. Extend drain piping from backflow preventers to nearest floor drain.




November 23, 2011

SECTION 237070 - HVAC PIPE AND EQUIPMENT INSULATION

PART 1 - GENERAL

1.1 GENERAL

A. Unless specifically noted otherwise, insulation shall have composite fire and smoke hazardratings (including insulation, jacket or facing, PVC covers, and adhesives), as tested by ASTME84, NFPA 255 or UL 723 procedures, not exceeding a flame spread rating of 25 and smokedeveloped rating of 50.

B. Piping systems shall be insulated in accordance with the schedule below, including flanges,fittings, valves, expansion joints, vents, drains and similar appurtenances. Piping subject tofreezing shall be insulated with a minimum of 2 inch insulation.

C. Piping tests shall be completed before insulation proceeds.

D. Insulation shall be provided continuously through sleeves and openings.

E. Adhesives and coatings shall be as manufactured by Insulcoustic, Foster or approvedequivalents, as follows:

Insulcoustic Foster Childers

Vapor Barrier Adhesive 225 85-20 CP-52

Vapor Barrier Coating 501 30-80 CP-35

Lagging Adhesive 102 30-36 CP-52

Insulation Adhesive 225 85-20 CP-82

Glass Cloth Adhesive 225 85-20 CP-82

Weatherproofing Mastic VI-AC 46-50 CP- 10/11

Calcium Silicate Adhesive 81-27 CP-97

F. Asbestos shall not be used in the manufacture of insulation products.

G. Refer to Section 15700 for verminproof insulation.

PART 2 - PRODUCTS

2.1 GENERAL

A. Refer to Section 15700 for component and equipment ratings. All components, fittings,equipment, coils, specialties, etc., shall meet the components pressure rating listed.

HVAC PIPE AND EQUIPMENT INSULATION237070- 1



2.2 PIPING SYSTEM INSULATION SCHEDULE

InsulationPiping System Type Minimum Insulation Thickness Notes

Hydronic heating P-1 1 1/2 inch for pipes 1-1/2 inches andsystem below; 2 inches for piping above

1-1/2 inches in diameter

Domestic cold water P-1 1/2 inchmake-up

2.3 TYPE P-1 GLASS FIBER

A. Insulation, including fiberglass fitting inserts, shall be glass fiber with a maximum K factor of

.24 at 75'F mean temperature with factory applied all-service jacket with self-sealing lip.

Exposed pipe insulation material must be the one piece type. Sectional type may be used for

concealed piping.

B. Seal butt joints with 3 inch wide butt stripe adhered neatly in place.

C. Fittings and valves for all piping shall be insulated with preformed fiberglass inserts of the same

density as the pipe insulation and finished with a PVC fitting cover. Provide one fiberglass

insert per fitting or valve for each 1 inch of piping insulation specified. Field cut or loose

blanket insulation is not acceptable.

D. Fittings and valves for steam piping shall be insulated with fiberglass inserts and finished with

.024 inch thick aluminum fitting flange and valve covers.

E. Exposed piping outdoors shall be finished with a factory attached all-service jacket, protected

with two 1/16 inch coats of Childers CP/10 or CP/ 11 weather barrier coating.

F. Exposed piping in finished spaces shall be protected with .024 inch thick stainless steel or

aluminum jacketing and fitting covers.

G. Product: Owens-Coming SSL-1 1, Manville Micro-Lok, KnauffASJ-SSL, Certainteed Alley-K.

PART 3 - EXECUTION

3.1 GENERAL

A. Insulation shall be applied on clean, dry surfaces.

B. Insulation shall be continuous through construction openings and sleeves.

C. Insulation on cold surfaces where vapor barrier jackets are required shall be applied with a

continuous, unbroken vapor seal. Hangers, supports, anchors and similar devices that are

secured directly to cold surfaces shall be adequately insulated and vapor sealed to prevent

condensation.

HVAC PIPE AND EQUIPMENT INSULATION237070-2


November 23, 2011

D. For pipes handling fluids below 70'F, provide one of the following means of preventing contactbetween pipe insulation and hanger or support:

1. High density rigid fiberglass insulation insert, equal in thickness to pipe insulation, withfactory applied jacket and metal protection shield or saddle, between pipe and hanger orsupport.

2. Insulation protection shields or saddles of sufficient length and strength to support weightof pipe without crushing insulation and shaped to fit not less than half the pipecircumference.

E. For pipes handling fluids 70'F and above, rest pipe directly on hanger, insulate pipe and hanger.

F. Apply insulation in strict accordance with manufacturer's recommendations.

G. Piping located on roof shall have 18 gauge stainless steel shield a minimum of 36 inches inlength the full circumference of pipe. Locate where insulation will be stepped on due tomaintenance traffic.


HVAC PIPE AND EQUIPMENT INSULATION237070-3


November 23, 2011

SECTION 237080 - HVAC PUMPS

PARTI - GENERAL

1.1 GENERAL

A. Provide circulating pumps for HVAC service as shown on the drawings and specified herein.Pumps shall have the flow rate capacity and head characteristics indicated on the drawings.

B. Submit pump performance curves for pumps for review.

C. Maximum cataloged impeller size for pump submitted shall be capable of producing 10 percentover scheduled head at scheduled flow.

D. Each pump shall be provided with gauges as specified and shown on the drawings.

PART 2 - PRODUCTS

2.1 GENERAL

A. Refer to Section 15700 for component and equipment ratings. All components, fittings,equipment, coils, specialties, etc., shall meet the components pressure rating listed.

* 2.2 TYPE "BM" IN-LINE WATER CIRCULATING PUMPS

A. Pumps shall be in-line type suitable for installation in the horizontal or vertical position. Pumpsshall have a cast iron body and one-piece cast bronze impeller. Pumps shall be non-overloadingand suitable for 125 psig working pressure and 225°F water temperature. Pump shall havestainless steel or bronze sleeved shaft.

B. Pump seal shall be carbon-ceramic seal suitable for 225°F temperature and 175 psig workingpressure.

C. Type "BM" pumps shall be ITT Bell & Gossett Series 80 pumps.

2.3 TYPE "DM" BASE-MOUNTED PUMPS

A. Pumps shall be base-mounted single stage end suction type. Pumps shall have a cast iron bodyand a one-piece cast bronze impeller. Pumps shall be non-overloading and suitable for 125 psigworking pressure and 225°F water temperature. Pump shall have a stainless steel or bronzesleeved shaft.

B. Pump seal shall be carbon-ceramic seal suitable for 225'F temperature and 175 psig workingpressure.

C. Type "DM" pumps shall be ITT Bell & Gossett Series 1510 centrifugal end suction pumps.

HVAC PUMPS237080-1


November 23, 2011

2.4 ADDITIONAL REQUIREMENTS

A. Additional Requirements for Pumps

1. Pump rating curves shall be the result of testing and rating in accordance with theprocedures of the hydraulic institute.

2. Pumps shall be provided with suction and discharge gauge tappings and plugs.

3. Impellers shall be dynamically balanced, keyed to the shaft and secured with a suitablelocking capscrew or locknut arrangement.

4. Pumps shall be factory tested, cleaned and painted with one coat of machinery enamelbefore shipment.

5. Provide suitable drain pan of stainless steel with drain connection below wetted surfacesfor pumps handling water below 60'F. Pipe to floor drain with 1/2 inch copper pipe.Provide protective ramps in aisles over piping.

B. Additional Requirements for Type D Pumps

1. Pumps volutes shall be provided with drain plug or plugs and vent plugs.

2. Provide pump with a flexible non-lubricated coupling capable of withstandingcombinations of shock, misalignment and end shock.

2.5 MANUFACTURERS

A. Bell and Gossett

B. Armstrong (in-line only)

C. Worthington

D. Taco

PART 3 - EXECUTION

3.1 GENERAL

A. Fill-in the pump base frame for base-mounted pumps with concrete as recommended by pumpmanufacturer.

B. Place the pump in operation and check for proper pump rotation and pressure drop.

C. For externally flushed stuffing boxes and seals, adjust drip rate for proper operation of seal andpipe stuffing box and seal discharge basin to floor drain with 1/2 inch galvanized pipe.

D. Measure motor current draw under normal operation to verify that pump is operating within theproper power limits and that the pump motor is not overloading.

HVAC PUMPS237080-2


November 23, 2011

E. Check motor/pump alignment in the field. Correct any misalignments before operating pump.


HVAC PUMPS237080-3

Delaware County Community College Project #177901246 … · Delaware County Community College...

Documents

Transcript of Delaware County Community College Project #177901246 … · Delaware County Community College...