015-CH-1001

KUWAIT OIL COMPANY (K.S.C.) Engineering Group-

Specifica tion Number 015-CH-1001

Pressure Vessels

1 08 SEPT 9 4 ISSUED AS KOC ENG. GROUP SPEC.

0 07 MAR 9 4 ISSUED FOR INVITATION TO BID

Rev Date Revision BY Chkd Section PE Client

CONTENTS

Q KOC Engindng Gmup S p ~ ~ n 1.0 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 STANDARD SPECIFICATIONS 4

Specification Number

01 5-CH-1001

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 SERVICECONDITIONS 6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0 TECHNICAL REQUIREMENTS 6 . . . . . . . . . . . . . . . . . . . . . . . . . 4.1 Company Vessel Design Data 6 . . . . . . . . . . . . . . . . . . . . . . . . . 4 .2 Contractor-Designed Vessels 6

Rev

1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 MATERIALS 7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0 CODES AND REGULATIONS 7

Date

08-9-94

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 DESIGN 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.1 General 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2 Loading 8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3 Combinations of Loading 1 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.4 Corrosion Allowance 1 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 Minimum Thickness 1 0

Sheet

2 of 36

8.0 CONSTRUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8.1 Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8.2 Nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3 Bolting and Gaskets 1 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.4 Manholes and Handholes 13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.5 External Attachments 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6 lnternals 14

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.7 Skirts and Supports 14

9.0 FABRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1 Welding 15

..................................... 9.2 Radiography 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.3 Stress Relieving 1 6

9.4 Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.0 INSPECTION AND TESTING 17 10.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 10.2 Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.3 Vessel Hydrostatic Test 2 0

. . . . . . . . . . . . . . . . . . . . . . . . . . 11.0 FIREPROOFING AND INSULATION 21

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.0 PAINTING 21

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.0 MISCELLANEOUS 22

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.0 FIELD ERECTION 22

15.0 PACKING. MARKING AND DOCUMENTATION . . . . . . . . . . . . . . . . . . 23

. . . . . . . . . . . . 16.0 SPARE PARTS AND MAINTENANCE REQUIREMENTS 23

. . . . . . . . . . . . . . . . . . . . . . . . . . 1 7.0 SUPPLEMENTAL REQUIREMENTS 23 17.1 Requirements for Wet Hydrogen Sulphide Service . . . . . . . . . . . 23 17.2 Metal Lining (Cladding) ............................. 24 17.3 Requirements for Tray Installation . . . . . . . . . . . . . . . . . . . . . . 28 17.4 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

APPENDIX 1 : GRAPH FOR DETERMINING PERIODIC TIME T AND LIMITS FOR STATICIDYNAMIC DESIGNS OF COLUMNS . . . . . . . . . . 30

APPENDIX 2: NOZZLE LOADS FOR VESSELS (HORIZONTAL AND VERTICAL) . . . . . . . . . . . . . . . . . . . . . . . 31

APPENDIX 3: LOAD DESIGN CASES AND LOAD COMBINATIONS . . . . . . . . 34

APPENDIX 4: PRESSURE VESSEL TOLERANCES . . . . . . . . . . . . . . . . . . . . . 35 TOLERANCES . HORIZONTAL VESSELS

APPENDIX 4: PRESSURE VESSEL TOLERANCES . . . . . . . . . . . . . . . . . . . . . 36 TOLERANCES . HORIZONTAL VESSELS

Specification Number Rev Date Sheet Engineering Group 01 6-CH-1001 1 08-9-94 3 of 36

.

1.0 SCOPE

1 -1 This specification covers the design, manufacture, inspection, testing and supply of pressure vessels for installation at the Facility in Kuwait. Vessels within packages shall conform to this specification.

1.2 This specification complements the data sheets for the equipment in which the operating conditions and other requirements are listed in detail.

1.3 The supply of pressure vessels shall fully comply with all relevant contractual requirements specified in the Scope of Work and Technical Specification of the Contract.

2.0 STANDARD SPECIFICATIONS

2.1 Pressure vessels shall conform in design, materials and performance, except where otherwise specified, with the current issue and amendments of the following prevailing on the effective date of the Contract:

2.1.1 International Standards

ASME Vlll Div 1

ASME Vlll Div 2

ASME IX

ASME II

ASME V

ASME B 16.5

ASME B 16.9

ASME B 31.3

ASME 816.47

NACE MR0175

Unfired Pressure Vessels

Unfired Pressure Vessels (Alternative Rules) Qualification Standard for Welding and Brazing Procedures, Welders, Brazers, and Welding and Brazing Operators

Material Specification

Non-Destructive Examination

Steel Pipe Flanges and Flanged Fittings

Factory-Made Wrought Steel Buttwelding Fittings

Chemical Plant and Petroleum Refinery Piping

Large Diameter Steel Flanges (NPS 16 through NPS 60) Sulphide Stress Cracking (S.S.C) Resistant Metallic Material for Oilfield Equipment

Specification Number Rev Date Sheet A UnP Englndng ~ r w p Specr7icblZbn 01 5-CH-1001 1 08-9-94 5 of 36

ASTM A578 Level 1

WRC Bulletin No. 107

WRC Bulletin No. 297

2.1.2 British Standards

BS 5500

BS CP3 Chapter V

Part 2

Specification for Straight Beam Ultrasonic Examination of Plain and Clad Steel Plates for Special Applications

Local Stresses in Spherical and Cylindrical Shells Due to External Loadings

Supplement to Bulletin No. 107

Unfired Pressure Vessels

Basic Data for Design of Buildings

Wind Loadings

2.1.3 Engineering Group Specifications

All equipment and accessories covered by this specification shall comply with all relevant project specifications of which the following are specifically referenced in this specification:

01 5-AH-1 001 Basic Design Criteria

01 5-AH-1 002 International Codes and Standards

0 1 5-CG-1001 The Use of Brackish Water for Site Hydrotesting of Equipment

0 1 5-KH- 1 902 Spare Parts and Maintenance Requirements

01 5-LH-1001 Piping Material Classes

01 5-MH-1002 Structural Steel Design, Materials and Fabrication

01 5-NH-1003 Thermal and Acoustic Insulation

01 5-NH-1004 Passive Fireproofing Materials and Application

01 5-UH-1001 Packing, Marking and Documentation

01 5-WH-1001 Welding Procedure Approval and Welding Quality Requirements

01 5-XH-1005 Shop and Field Painting

E n g l d n g Gmup S p ~ ~ n

2.2 Compliance with this specification shall not relieve the Contractor of its responsibility to supply equipment suited to meet the specified service conditions and applicable regulations.

2.3 Where conflicts exist between this specification and other Drawings, standards, codes and specifications, the most stringent shall be applied.

3.0 SERVICE CONDITIONS


01 5-CH-1001

3.1 The pressure vessels shall be suitable for continuous operation at a desert location under high ambient temperatures and humidity. The atmosphere at the Facility is generally dusty and corrosive and may contain traces of hydrogen sulphide.

3.2 Pressure vessels shall in all respects be suitable for continuous operation in the service conditions stated in the Engineering Group Specification entitled "Basic Design Criteria" (Number 01 5-AH-1 001 ).

Rev

1

4.0 TECHNICAL REQUIREMENTS

4.1 Com~anv Vessel Desian D a u

Date

08-9-94

Principal design Drawings which include design conditions, material specifications, principal dimensions, general requirements, etc. shall be furnished for each vessel by the Company.

Sheet

6 of 36

4.2 Contractor-Desianed Vessels

4.2.1 When pressure vessels are furnished as part of a "package unit" or vessels whose inherent special process design features classify them as "proprietary" items, they shall be designed in compliance with all applicable sections of this specification.

4.2.2 Where data sheets indicating general service requirements, materials of construction, principal dimensions or capacities, etc., but no design, are furnished by the Company, the vessels shall be designed in accordance with all applicable sections of this specification which shall be in line with the relevant codes, standards and specifications.

4.2.3 Vertical or horizontal vessels with removable internals (i.e., filter vessels, etc.) shall have at least one 24-in. nominal bore (NB) manway where the vessel inside diameter (ID) is greater than 91 5 mm. Vessels 91 5 mm ID and less with removable internals shall have body flanges and/or a Company-approved quick release closure.

4.2.4 Any deviation from these requirements shall be approved, in writing, by the Company.

5.0 MATERIALS

All materials shall be new and of first quality and of the type and grade specified on the individual vessel drawings and data sheets.

No substitution of material may be made without the written approval of the Company.

Structural quality steels are not acceptable for pressure-retaining parts.

Carbon content of ferritic steel components for welding shall not exceed 0.23%. The maximum carbon equivalent shall be 0.43%.

Tubes or pipe for welding shall be seamless and manufactured by open hearth, basic oxygen or electric furnace process for pressure retaining parts.

Internal attachments of columns and vessels, such as tray support rings and downcomer bolting bars, etc. shall be of the same type of material as the shell.

Materials for sour service shall conform to NACE MR0175 (latest edition) and paragraph 17.1 of this specification. Where the material specification is not indicated on the vessel data sheet or for pressure vessels within packages, the proposed material shall be submitted to the Company for its approval. The use of ASTM A51 5 - Grade 7 0 material is not permitted.

6.0 CODES AND REGULATIONS

6.1 Design, materials, fabrication, inspection, testing and stamping shall be in accordance with the current edition of ASME Section VIII, Division I or Division II, ASME Section IX and the documents accompanying the Request for Bids and Purchase Order. When so specified on the data sheet, vessels shall be stamped with ASME code symbol "U."

6.2 National Laws and Regulations together with any local bylaws for Kuwait must be complied with.

7.0 DESIGN

7.1 General

7.1 .I Vessels covered by this specification shall be designed for the most severe combination of conditions which may be

EngnOiK/ng Group SpeMcatbn


01 5-CH-1001

Rev

I

Date

06-9-94

Sheet

7 of 36

experienced in construction, normal operation and service. See paragraph 7.3 for load combinations.

7.2 Loading

7.2.1 Internal Pressure

Design pressure at the highest point of a vertical vessel and at the highest point of a horizontal vessel shall be calculated as follows:

The minimum vessel internal design pressure shall be 3.5 barg (50 psig).

Sheet

8 of 36

Max Operating Pressure (MOP) 1 to 2.4 barg (15 to 35 psig)

2.4 to 10.4 barg (36 to 150 psig)

10.4 to 34.5 barg (1 51 to 500 psig) 34.5 to 69 barg (501 to 1000 psig) > 69 barg (1 000 psig)

Using the design pressure at highest point as stated above, the design pressure at any lower point is determined by adding the maximum operating liquid head and any pressure gradient within the vessel. Minimum Specific Gravity (SG) is 1.0.

-

Englneerlng Group SpeeXcczihn

Design Pressure 3.5 barg (50 psi@ MOP + 1 barg (1 5 psig) MOP x 1.1

MOP + 3.5 barg (50 psi@ MOP x 1.05*

When vessels are stacked, intermediate heads shall be designed for the maximum differential pressure assuming either compartment is depressurised, except when design for differential pressure is indicated on the vessel data sheet .

Rev

1


01 5-CH-1001

* (maximum of MOP + 6.9 barg (100 psig)

7.2.2 External Pressure

Date

08-9-94

Vessels used in vacuum service or subjected to steam-out conditions shall be designed for an external pressure of 1.0 bar.

7.2.3 Design Temperature

Design temperature shall not be less than the maximum temperature the material may attain under the operating conditions. In general, this shall be taken as 28OC above the maximum operating temperature unless.otherwise indicated on the Drawings and data sheets but shall not be less than 93OC.

EnglneerJng Gmup SpedtkWvn

7.2.4 External Loads

a. Vessels and anchor bolts shall be designed to resist all external loads such as wind, platforms, davits, connected pipework, etc. The wind loads shall be calculated as per BS CP3 Chapter V, Part 2, with the wind velocity of 45 mls at the height of 10 m from the grade level.


01 5-CH-1001

b. Design wind speed Vs = V x S1 x S2 x S3 per CP3: Chapter V, Part 2,

where V =basic wind velocity S1 topography factor = 1.0 S2 ground roughness category (1) - open

country with no obstructions S3 statistical factor = 1.0.

Rev

1

Test Loads

Vessel shall be designed to resist all forces when completely filled with water in the corroded condition unless otherwise indicated in Drawings and data sheets.

Date

08-9-94

Dynamic Loads

Sheet

9 of 36

Vertical vessels requiring dynamic design as dictated by Appendix 1 of this specification shall be additionally checked for stability under conditions of wind-induced vibrations. The maximum allowable lateral deflection of vertical vessels due to wind shall not exceed HI300 for static and dynamic design (H = height including skirt). Nozzles Load

a. Process nozzles, relief lines and piped vent connections shall be designed to accept the nozzle loads as detailed in Appendix 2 of this specification.

b. Local loadings may be evaluated in accordance with BS 5500 Appendix G or WRC Bulletin No. 107 or 297, as referred by ASME Section VIII, Div. 1.

7.3 Combmarnns of Load . . iQg

Ewnodng Group Spedtkxtion

7.3.1 Vertical vessels shall be designed to be self-supporting with load design cases and loading combinations in accordance with Table 1 of Appendix 3 of this specification.

7.3.2 Allowable tensile membrane stresses in tension for non-pressure parts may be increased by 33 113% when wind is in combination with other loadings. Allowable compressive stress shall be determined in accordance with ASME Section VIII, Div. 1, paragraph UG-23.


01 5-CH-1001

7.3.3 Horizontal vessels supported by two saddles shall be investigated according to L.P. Zick method for calculating "Stresses in Large Horizontal Cylindrical Pressure Vessels on Two Saddle Supports," or BS 5500, Appendix G, as referred by ASME Section VIII, Div. 1,

7.3.4 Concrete-bearing stress under baseplates for vertical vessels and columns shall not exceed 5 Nlmm2.

Rev

1

7.4 Corrosion Allowance

7.4.1 The minimum corrosion allowance for carbon steel and low alloy vessels shall be 3.0 mm unless otherwise specified on the Drawing or data sheet.

Date

08-9-94

7.4.2 The corrosion allowance shall be added to both sides of tray support rings and other fixed internals when exposed to corrosive liquids or atmosphere. Removable carbon or low-alloy steel internals shall have one half of the corrosion allowance added to each side where exposed to corrosive liquids or atmospheres.

Sheet

10 of 36

7.4.3 The corrosion allowance for nozzles and manways shall be at least equal to that specified for vessel shell.

7.5 Minimum Thickness

7.5.1 For vessels fabricated of carbon or low-alloy steel, the minimum shell or head thickness before corrosion allowance is added shall be the greater of 6.4 mm (for vessels outside diameter (OD) up to 2700 mm) or Dl800 + 3 where D = nominal vessel diameter in millimeters (for vessels OD 2700 mm and above).

7.5.2 The thickness after forming of straight flange of dished heads shall not be less than the thickness of the shell course to which it is attached.

7.5.3 The minimum thickness for ,high-alloy steel pressure containing parts shall be 4.8 mm.

Engineering Group SpeMmtbn

7.5.4 Thickness specified on Drawings and documents for pressure parts must be considered as minimum design thickness. Account shall be taken of rolling tolerances, forming of different parts, etc. The final thicknesses used shall be the full responsibility of the Contractor.

8.0 CONSTRUCTION


01 5-CH-1001

8.1 Heads

8.1 .I Dished and flanged heads, or spun heads, shall be used except when flat or hemispherical closures are required to satisfy a special design feature.

8.1.2 Semi-ellipsoidal heads are preferred. Torispherical heads with a distinct crown and knuckle radius (preferably 10% of diameter), and dimensions within the design code, are acceptable.

Rev

I

8.1.3 The proposed head shapes, together with dimensional details, must be stated at quotation and on the working Drawings.

8.1.4. Carbon and low-alloy steel, cold formed heads shall be normalised.

Date

08-9-94

8.2 Nozzles

Sheet

11 of 36

Electric Resistant Welding (ERW) pipe is not acceptable for nozzle necks. Seamless pipe shall be used for up to NPS 16 in. Rolled plate may be used in lieu of seamless pipe subject to full penetration welding and 100% radiography of the weld for NPS 16 in. and over.

Flanges shall be forged welding neck type unless otherwise stated. Dimensions of flanges up to NPS 2 4 in. shall conform to ANSI B16.5 and to ASME B1 6.47 Series A above NPS 24 in. Machining finish shall be in accordance with the Engineering Group Specification entitled "Piping Material Classes" (Number 01 5-LH-1001). Nozzle construction and materials shall be in accordance with the specifications and standards as listed on the Drawings and data sheets. Nozzle projection into vessel for the purpose of reinforcement is to be avoided, unless otherwise required for process reasons.

Bolt holes in flanges shall straddle the vessel centre lines unless otherwise stated.

Englndng Omup SpecJflcatbn

Reinforcing pads shall be of the same material as the shell plates. A %-in. NPT threaded tell-tale hole shall be provided complete with a threaded plug, and used for air-testing the attachment welds.

The edges of shell or head at the periphery of all nozzles shall be examined by ultrasonics for laminations before cutting and welding.


01 6-CH-1001

Minimum nozzle connection to shell or head shall be 2-in. NB Nozzles less than 2-in. NB shall be swaged, incorporating a concentric reducer.

Pipe sizes of 2%-in. NB, 3%-in. NB and 5-in. NB shall not be used.

Rev

1

Instrument nozzles 2-in. NB and above shall be 300-lb rating minimum.

8.2.10 Studded flange connections (i.e., studding outlets) are not permitted.

Date

08-9-94

8.2.1 1 Welding fittings shall be according to ANSI 81 6.9.

Sheet

12 of 36

8.2.12 The flange neck thickness shall match the pipe schedule.

8.2.13 The minimum thickness of nozzle necks including corrosion allowance shall be the greater of that calculated by ASME Section VIII, Div.1, paragraph UG-45 or the thickness listed below:

Carbon and Low-Allov Steel

a. For sizes up to and including 3-in. NB, use schedule 160 pipe.

b. For sizes over 3-in. NB up to 10-in. NB, use schedule 80 pipe.

c. For sizes over 10-in. NB, use 13-mm minimum thickness.

8.3 Boltina and GaskeQ

8.3.1 Unless otherwise specified on vessel data sheets, bolting shall conform to the following minimum requirements:

a. External Bolting for Pressure Parts: studbolts to ASTM SA-193 Grade 87, nuts to ASTM SA-194 Grade 2H heavy hexagon.

Englneerlng Gmup SpecifictWn

b. External bolting for stainless steel vessels shall also be of stainless steel material, e.g., A1 93 Grade B8IB8M and nuts to A1 9 4 Gr.818M.

c. Internal Bolting: bolts to be ASTM SA-193 Grade B8 or B8C. Nuts to be ASTM SA-194 Grade 8 or 8C unless otherwise specified. ASTM A307 Grade B shall not be used for internal bolting.


01 5-CH-1001

8.3.2 All studbolts to be threaded full length. Thread form to be Unified National Coarse (UNC) Series for bolts less than 1-in. diameter and 8-UN series threads for 1 -in, diameter and greater.

8.3.3 Equivalent substitute material specifications are subject to approval by the Company.

Rev

1

8.3.4 Gaskets for blanked connections shall be as specified on the equipment data sheet.

8.3.5 Spare bolting shall include at least 10% stud bolts, nuts, washers, etc. of each (with minimum of two units).

Date

08-9-94

8.3.6 The Contractor shall furnish two sets of spare gaskets for all blind flanged nozzles, manholes and shell flanges in addition to erection gaskets to be installed at the Site.

Sheet

13 of 36

8.4 Manholes and Handholes

8.4.1 Manholes shall be 24-in. NB unless otherwise specified.

8.4.2 All manhole covers shall be provided with adequate davits.

8.4.3 Manways shall be located so as to enable safe access and escape for maintenance personnel.

8.4.4 Gripping bars and rungs shall be provided at each manway to provide access to internals.

8.4.5 Horizontal vessels exceeding 6000 mm in length shall be provided with a minimum of two manways.

8.4.6 Only forged steel eye bolts shall be provided for davits.

8.5 External A t t a c h m m

8.5.1 Vertical vessels shall be provided with adequate lifting lugs to facilitate handling during transport and Site erection. For large vessels, specific attention shall be paid to the design of lifting lugs to suit the Site lifting equipment.

8.5.2 All lugs shall be designed for 1.5 times the weight of the vessel.

8.5.3 Where vertical vessels have H-section stiffeners, the web shall be drilled with 14-mm diameter hole at 1000-mm spacings to enable drainage.

All baffles, tray support beams or other internals spanning a chord or diameter of the vessel shall be provided with a means for allowing differential expansion between the part and the vessel shell.

Internal non-pressure piping for carbon steel vessels shall be fabricated, as a minimum from extra strong seamless carbon steel pipe, conforming to ASME SA-106-B or equivalent.

Internal flanges may be fabricated from plate, For high-alloy or high-alloy-clad vessels, pipe and flanges shall be fabricated of the same material as the shell or cladding unless otherwise specified on the drawings and data sheets.

Internal pressure piping shall be fabricated from forged flanges and seamless pipe to the same specifications as the external connected pipe.

All internals (fixed and removable) shall be supplied and installed prior to shipment unless otherwise stated on the vessel Drawing.

Unless stated otherwise on the vessel Drawing, baffles, demisting elements or weir plates shall not be welded directly to the shell (or head) for vessels in hydrocarbon service, but shall be bolted to support attachments which are welded to the shell.

Inlet nozzles shall be provided with impingement devices. The material of the impingement devices shall be as per the shell material.

8.7 Skirts and SUDDO-

31 2-0036

8.7.1 Horizontal vessels shall be supported on two saddles.

EngfneetYng Gmup SpMcathn

8.7.2 Vertical vessels shall be supported by skirt, legs or lugs as shown on the vessel Drawing.

8.7.3 Skirt, saddles, etc., shall be designed to withstand the imposed loads from future site hydrotesting.

9.0 FABRICATION

9.1 Welding

All welding procedures shall be submitted to the Company for approval before commencing fabrication. Welding procedure for stress-relieved vessels shall be based upon a maximum of two heating cycles, i.e., one time repair after stress relieving or hydrotesting; the same is applicable for vessels in packages.


015-CH-1001

No welding shall be performed at an ambient temperature of less than 10C, unless preheating is employed, as per code requirements.

Only welders who are qualified in accordance with the ASME Code and the Engineering Group Specification entitled "Welding Procedure Approval and Welding Quality Requirements" (Number 015-WH-1001) shall be employed on the subject vessels.

Rev

1

Seams in supporting skirts shall be full-penetration double butt- welded or equivalent. Connections between skirt and head shall be made with a smooth, flat-faced fillet weld, welded from the outside of the skirt only. No tack welds are permitted on the inside at the skirt-to-head joint. Size of fillet welds for all internal attachments shall include the corrosion allowance specified on vessel Drawings and data sheets, Internal welds for support rings and lugs shall be full penetration.

Date

08-9-94

All internal and external attachments shall be positioned so that the distance between fillet welds of these attachments and the pressure-retaining welds shall not be less than three times the vessel thickness or 50 mm, whichever is greater.

Sheet

150f 36

Rectangular-or square-reinforcing plates and pads shall have 40- mm radiused corners.

9.1.8 Backing strips shall not be used for any pressure vessels including packaged vessels. All seams in shell or heads shall be full-penetration double butt welds or equivalent.

9.1.9 All welding shall be in accordance with ASME Section IX and the Engineering Group Specification entitled "Welding Procedure Approval and Welding Quality Requirements" (Number 01 5-WH- 1001).

EngineerJng Qmup Specificatbn

9.1.10 Where stiffeners are required by the codes for the vacuum vessels, they shall be continuous and preferably external.


01 5-CH-1001

Rev

1

9.1 .I 1 The ring welds should be positioned at least 1 50 mm clear of circumferential seams, vessel's branches and other permanent attachments unless otherwise approved by the Company. Unless otherwise specified, stiffeners shall be welded to the shell with continuous weld seams.

The extent of radiography shall be as specified on the data sheet. In no case shall the radiographic examination be less than spot radiography plus all butt-weld intersection T-joints.

Date

08-9-94

Radiographic examination of welds shall be in accordance with ASME Section VIII, Division 1 or 2, as applicable. X-ray equipment shall be used.

Sheet

16 of 36

The radiographic film used shall be of class 1 (low speed, very fine grain) or class 2 (medium speed, fine grain). Radiographic sensitivity shall be 2% or better as per SE-94 Article 22 of ASME Section V.

In addition, the Company reserves the right to radiographically examine and interpret the welds. For welds not meeting the codelspecification requirements, the repair and radiography of these welds shall be at the Contractor's expense.

Defective welding disclosed by radiography shall be chipped out, rewelded and re-radiographed, plus any additional radiographs or tests required by the applicable design or construction code, by the Contractor at its expense.

9.3 Stress Relieving

9.3.1 Vessels shall be stress relieved when specified on the data sheets. In no case shall the stress-relieving be performed at less than the minimum temperature specified by the Code. Longer duration, lower temperature stress relieving as shown in

Specification Number Rev Date Sheet Group 01 5-CH-1001 1 08-9-94 17 of 36

Table UCS-56.1 of ASME Section VIII, Division 1 shall not be permitted. A procedure shall be submitted to the Company for review and approval.

All vessels shall be stress relieved as a complete unit. Any Brinell hardness tests shall be made after post weld heat treatment (PWHT) on weld heat-affected zones (HAZs). The results of the tests shall be recorded in the vessel fabrication records. Special consideration shall be given to vessels in LT (low temperature) service and for cases where blowdown may occur in operation.

All flange faces shall be suitably protected against oxidation during heat treatment.

On vessels requiring full stress relief, all welding must be carried out before heat treatment.

Any repairs required after completion of vessel PWHT or hydrostatic test shall be described in detail and submitted for the Company's approval, together with the proposal for subsequent vessel examination, PWHT and testing, before proceeding with such repairs. All repair work and examinations shall be in accordance with the requirements of ASME Section VIII, Division 1.

After PWHT, the words "STRESS RELIEVED VESSEL, NO WELDING ALLOWED" shall be painted on the vessel shell in 1 00-mm-hig h letters.

9.4 Tolerances

Fabrication tolerances shall conform to ASME Section VIII, Division 1 and Appendix 4 of this specification unless shown otherwise on the vessel Drawing or data sheet.

10.0 INSPECTION AND TESTING

10.1 I n s ~ e c t i o ~

10.1 .I Inspection shall be in accordance with the provisions of paragraphs 6.1 and 6.2 of this specification.

10.1.2 The Company's inspector shall have free entry to the Contractor's facilities while any work or testing are in progress on the Company's vessels.

10.1.3 Third-party inspection involvement shall be at the Company's discretion.

b. All main seams in ferritic steel vessels welded by the manual metal arc process shall be ground smooth on completion and submitted to wet magnetic particle crack detection.

Ewneerlng Qmup S p ~ ~ n

c. The main seams of all vessels constructed of alloy steels shall be 100% radiographed.

d. Vessels requiring PWHT and 100% radiography shall be radiographed after heat treatment. Any radiography

-


01 5-CH-1001

10.1.4 Manway davitslhinges and hinge pins shall be in place before the vessel is tested. Covers shall be swung open to ensure that no binding occurs.

10.1.5 All acceptance Non-Destructive Testing (NDT) shall be carried out after PWHT.

10.1.6 An Approved Manufacturer's Quality Plan shall be submitted to the Company for its review and approval.

10.2 Tests

Sheet

18 of 36

Rev

1

10.2.1 All tests and testing procedures used shall be in accordance with the applicable design code with any additional tests as may be called by the Company and in the data sheets.

Date

08-9-94

10.2.2 All reinforcing pads are to be leak tested with air (1.0 barg) and soapy water after stress relief.

10.2.3 Ultrasonic testing and weld sampling, where required, shall be in accordance with the appropriate specification shown on the vessel data sheet.

10.2.4 Magnetic particlelliquid penetrant examination shall be performed in accordance with ASME Section VIII, Division 1.

10.2.5 Tubes and forgings (excluding flanges, blank covers, blocking rings and support rings) which have a thickness of 50 mm or above shall be tested ultrasonically as per ASME A388. Acceptance criteria shall be per ASME Section V.

10.2.6 Clad steel plates shall be tested as per ASME A578.

10.2.7 NDT for welded joints shall be as per ASME VIII, Division I, and ASME V, except as modified hereinafter:

a. The main seams of pressure vessels having thickness of 50-mm or above shall be supplementarily examined by ultrasonics.

Q KOC Specification Number Rev Date Sheet Englndng Gmup SpeMcathn 01 6-CH-1001 1 08-9-94 19 of 36 before heat treatment shall be at the Approved Manufacturer's expense.

In vessels which are required to undergo PWHT, the attachment welds of branches larger than 8-in. NB and of manholes, shall be examined by a wet magnetic particle crack detection method after PWHT. For this purpose, the welds shall be ground sufficiently prior to PWHT to remove surface irregularities which could mask indications of defects.

Where heads are formed in one piece from more than one plate, weld seams shall be fully radiographed before forming and, additionally, weld seams in the knuckle region shall be fully radiographed after forming.

T- or corner-type butt joints shall be non-destructively examined for internal and surface flaws.

Set-through nozzles made from rolled plate and with a wall thickness in excess of 19 mm shall be examined for laminations along the line of the attachment weld prior to welding.

The complete length of all welds on lifting and tailing attachments (e.g., attachment to pad, pad to vessel, etc.) shall be examined by magnetic particle or dye penetrant method for surface flaws.

The root pass and completed weld of all nozzle/shell attachments shall be examined by the magnetic particle met hod.

Vessels requiring spot radiography shall have a minimum of 5% of the welds radiographed. Those radiographs shall include all the weld intersections.

All vessels specified for lethal or sour service shall be 100% radiographed unless otherwise specified by the Company. In addition, all welds shall be examined by the wet fluorescent magnetic particle method to ASTM E709 and ASME Section V, Article 7.

10.2.8 Ultrasonic Technique for Nozzles Welds and Plates

a. An ultrasonic examination shall be made from the bore of nozzles exceeding 150-mm ID in shell plates having a 50- mm thickness or more to confirm that full penetration

welds have been achieved and that no delamination of the nozzle has occurred.

Q KOC Engineering Gmup spi?&htb b. When welds are examined by ultrasonic techniques,

examination shall be performed in accordance with a procedure base on BS 3923 Part 1, and shall be subject to approval by the Company.

c. Carbon and low-alloy steel plates having a thickness of 25.4 mm (1 in.) and above shall be tested by ultrasonic technique to ensure that they are free from gross internal discontinuities, such as ruptures, laminations and piping, or other detrimental defects. Testing shall be as per ASTM-A 435 or BS 5996.


01 5-CH-1001

10.2.9 Magnetic Particle and Penetrant Test

a. The magnetic field shall be produced by AC magnetic yoke or, subject to approval by the Company, by permanent magnets, techniques liable to cause arcing are not permitted.

Rev

1

b. All internal and external welds of the nozzles, as well as all internal or external weld attachments shall be examined by the magnetic particle method. The penetrant test method shall be used for high-alloy and stainless steel vessel welds.

c. For dye-penetrant testing of stainless steel, chloride-free material shall be used.

Date

08-9-94

10.3 Vessel Hvdrostatic Tea

Sheet

20 of 36

10.3.1 Hydrostatic testing shall conform to paragraph UG-99(c) of ASME Section VIII, Division 1. Calculations shall be made to determine maximum allowable working pressure. Design checks shall be made to prove that the stress in any section of the vessel during hydrotest shall not exceed 90% of the minimum yield stress at ambient temperature for the material used.

10.3.2 Equipment shall be designed to withstand future hydrostatic test pressure in erected position and in corroded condition with allowable stress not to exceed 90% of material specified minimum yield strength at ambient temperature.

10.3.3, Future Site test pressure shall be in accordance with paragraph UG-99(b) of ASME Section VIII, Division 1.

10.3.4 The minimum metal temperature throughout the hydrotest shall be established to ensure safety of the vessel, but shall not be less than 15OC.

Engineering Gmup S~~~C~TCB&~I

10.3.5 Shop hydrotest water shall be potable quality. For austenitic stainless steel vessels, the testing water shall be demineralized water with 30 ppm chloride content maximum.

10.3.6 In the event of Site hydrotesting, brackish water shall be used in accordance with the Engineering Group Specification entitled "The Use of Brackish Water for the Site Hydrotesting of Equipmentn (Number 01 5-CG-1001 I .


01 5-CH-1001

A pressure recorder with calibrated pressure charts shall be installed on the vessel during hydrotesting to record the rate of pressurising, holding time and rate of depressurising. These charts shall be included with the hydrotest report. Calibrated gauges are required for testing. Both pressure recorders and gauges shall have a test certificate indicating that these instruments have been calibrated to the relevant standards and specifications. Calibration shall be witnessed by the Company or a Company-nominated third party inspectorate.

10.3.8 The test pressure shall be held for at least 30 minutes per cm of thickness but in no case less than 2 hours.

Rev

1

10.3.9 For field-tested vessels as specified in section 10.0, the test medium shall be at a minimum temperature of 20C unless otherwise agreed to in writing with the Company.

10.3.10 Removable internal parts, e.g., demisting elements, baffles, etc., shall be installed only after satisfactory testing.

Date

08-9-94

11.0 FIREPROOFING AND INSULATION

Sheet

21 of 36

~

1 1.1 Where vessels skirts are to be fireproofed as indicated on the Drawings and data sheets, W-in. square nuts shall be welded on a 450-mm triangular pitch to the inside and outside surfaces of skirts as well as the exterior of the bottom head. Any variation from this requirement will be shown on the vessel Drawings and data sheets.

11.2 Where vessels are to be insulated, a11 insulation support rings shall be supplied and %-in. square nuts on 450-mm triangular pitch shall be welded to the outside surface of bottom head.

11.3 All interior studs, rods or clips for internal refractory or gunite linings, unless otherwise stated on vessel Drawings, shall be furnished.

12.0 PAINTING

Painting of pressure vessels shall be in accordance with the mechanical data sheets and Engineering Group Specification entitled "Shop and Field Painting" (Numbering 01 5-XH-1005).

13.0 MISCELLANEOUS

13.1 Service gaskets and bolting shall not be used for hydrostatic test but shall be suitably boxed and tagged for field installation. Gaskets of the same type as the service gaskets shall be used for the hydrostatic test.

13.2 All platform and ladder clips, davit brackets, pipe supports, etc., unless stated otherwise on the data sheets, shall be furnished.

13.3 Tall vessels which have safety relief valve greater than 2-in. NPS or having removable internals shall be provided with a davit arm.

13.4 Two earthing clips shall be provided on the vessel support.

13.5 The vessel shall be fitted with a stainless steel nameplate permanently attached by welding to a suitable bracket which will locate the nameplate clear of any insulation. In addition to data required by the ASME code, the nameplate shall include the Company's equipment number.

13.6 On completion of all work, vessels are to be cleaned and dried out, flange faces to be coated with grease or easily removable rust preventative. Prior to shipment, nozzles are to be fitted with bolted metal or wooden blanks to protect the machined surfaces and screwed couplings are to be fitted with plugs, to prevent the ingress of dirt or moisture.

14.0 FIELD ERECTION

14.1 Where size or shape of vessel make it impossible to ship in one piece for erection, the largest shop-fabricated sections suitable for shipment and ease of handling for field erection and assembly shall be shipped to the Site. Design, fabrication, testing and inspection shall be in accordance with this specification.

14.2 Where size or shape of vessel are such that they must be shipped in sections or pieces for field erection, the following requirements shall apply:

14.2.1 All pieces shall be shop fitted-up into sections and each section fitted to adjacent section and all pieces match marked.

Engineering Gmup SpeMcahbn

-


01 5-CH-1001

Rev

I

Date

08-9-94

Sheet

22 of 36

14.2.2 The width of permissible gap during fit-up shall be in accordance with approved shop Drawings and welding procedures, and shall generally be 3 mm maximum with a tolerance of plus 1 mm minus 0.

Group

14.2.3 Flame-cut edges shall be ground as required to remove slag and detrimental discoloration and to ensure smoothness and uniformity of edges.

14.2.4 All radiography requirements for welds completed in the shop shall be made before the part or section leaves the shop.


01 5-CH-1001

15.0 PACKING, MARKING AND DOCUMENTATION

For all relevant requirements, refer to the Engineering Group Specification entitled "Packing, Marking and Documentation" (01 5-UH-1001).

16.0 SPARE PARTS AND MAINTENANCE REQUIREMENTS

For all relevant requirements, refer to the Engineering Group Specification entitled "Spare Parts and Maintenance Requirements" (01 5-KH-1902).

17.0 SUPPLEMENTAL REQUIREMENTS

17.1 Reauirements for Wet Hvdroaen Subhide Service

All the requirements of NACE MR0175 (latest edition) shall be applied, when the vessel data sheet andlor specifications indicate the service environment to be sour.

17.1.1 Plate Materials

a. The following limitations on chemical composition shall apply:

Rev

1

1. The maximum carbon content shall be 0.23%.

2. Carbon equivalent to be computed from the following formula:

Date

08-9-94

CE = C + h & + C r + M o + V + N i + C u 6 5 15

CE shall not exceed 0.43%.

3. Plates having a thickness of 10 mm and above shall be ultrasonically tested for laminations in accordance with ASTM SA-578 Level 1.

Sheet

23 of 36

b. The following limitations on chemical composition shall apply:

Engineering Group SpeMctltbn

1. Sulphur content: maximum 0.007% (ladle analysis) - 0.009% (check analysis).

2. Phosphorus content: maximum 0.015% (ladle analysis) - 0.020% (check analysis).


01 5-CH-1001

3. Rare earth metal are not permitted.

1 7.1.2 Hardness I

Rev

1

a. The maximum hardness of parent metal and welds shall be 235 HBN.

b. Hardness measurements shall be made on the internal vessel welds. A minimum of one reading (including base metal, weld and HAZ shall be made on each circumferential weld and on each longitudinal shell course weld.

Date

08-9-94

17.1.3 Pipes and Fittings

Sheet

24 of 36

Because of the significantly greater risk of crevice corrosion in sour service, the use of socket-welded fittings, screwed couplings or any other weld detail which could result in a crevice on the process side is not permitted. The use of ERW pipes is not permitted.

17.1.4 Welding

a. Cr-112% Mo welding consumables and those having more than 1 % Ni shall not be used for welding carbon steels.

b. Weld repair of plate surface defects shall not be permitted without Company approval and shall be subject to Company approval of the Contractor's repair procedure prior to the work being carried out.

c. All pressure vessels for sour service shall be stress relieved to ASME Section Vlll code.

I 17.1.5 NDT for Welded Joints I a. Except as otherwise specified by the Company, all

pressure vessels specified for sour service shall be 100% radiographed. In addition, all internal weld surfaces shall

be examined by the wet fluorescent magnetic particle method.

b. Nozzles and manway attachment welds shall be examined by wet magnetic particle methods.

Engineering Gmup Specr7iatrion

17.2 Metal Linina (Claddin@


01 5-CH-1001

1 7.2.1 Pressure vessels constructed with corrosion-resistant integral cladding, weld metal overlay cladding or with applied lining shall generally be in accordance with the rules of Part UCL of ASME, Section VIII, Division 1 code and as modified hereinafter.

Sheet

25 of 36

Rev

1

17.2.2 Cladding shall be integrally and continuously bonded onto the base metal and shall be obtained either by roll bonding or explosive cladding. Clad plates shall conform to one of the following specifications:

Date

08-9-94

a. ASME A263 Corrosion Resisting Chromium-Steel Clad Plate, Sheet and Strip 1

b. ASME A264 Corrosion Resisting Chromium-Nickel Steel Clad Plate, Sheet and Strip

c. ASME A265 Nickel and Nickel-base Alloy Clad Steel Plates

17.2.3 Clad plate shall be used in preference to weld overlay. Proposals to use the weld overlay method shall need to be approved by the Company. When approved, the exact extent of weld overlay and the successful overlay procedure shall require Company approval.

17.2.4 Interior surfaces and flange faces of nozzles and manholes shall be of the same alloy as the cladding or weld overlay and made as follows:

a. Nozzles including flange faces shall be integrally clad or lined with deposited weld overlay.

b. For nozzles of 3-in. diameter and smaller, a loose sleeve liner may be used subject to Company approval.

17.2.5 Nozzles shall be fabricated using combinations of cladding weld overlay or sleeve liner (when permitted by the Company) with deposited weld metal to provide continuity or shall be totally overlaid with deposited weld metal. Detailed Drawings showing fabrication of nozzle necks, attachment to vessel shell and

Rev

flange facings, shall be submitted to the Company for approval before the start of fabrication.

' Englndng Group

17.2.6 Welding of clad plates and weld overlays shall be as follows:

Date .. . .


01 5-CH-1001 I 1 08-9-94 1 26 of 36

Welding overlay and welds joining clad plate shall be qualified in accordance with ASME IX. Macro section with Brinell hardness indents shall be taken at three locations through the interface of the overlay welding. Hardness shall not exceed 310 HBN for non-sour service and 235 HBN for sour service.

Sheet

t

Austenitic weld overlay procedures shall be capable of withstanding the effects of possible sigma phase formation if heat treatment is to be performed.

Weld overlay and welds joining clad plate shall be deposited in a minimum of two passes. The initial layer shall be deposited with a more highly alloyed welding consumable to take into account dilution with the base metal.

The ferrite content of austenitic stainless steel weld metal deposit shall be determined by a calibrated meter or calculated by reference to the Schaffler-Delong Diagram. The acceptable range is from 3% to 10%.

For depositing austenitic weld overlay or for joining austenitic stainless steel plates, the chemical composition of the final layer shall comply with that of the corresponding AWS consumable classification, except that type 304L cladding shall be joined with an AWS-ER308L or ER347 consumable. For joining ferritic stainless steel plates, AWS-E309 welding consumables shall be used.

17.2.7 The inspection and acceptance criteria for cladding shall be as follows:

a. Examination of the cladding bond shall be carried out in accordance with ASME A578 Supplement S7.

b. Completed butt joints on the clad side shall be inspected visually and with liquid penetrant (dye penetrant) after hydraulic testing.

c. The surface of each completed butt joint weld overlay shall be examined for chemical composition. The technique and the equipment shall be subject to approval by the Company.

d. At least one analysis check shall be selected for each 1.5-m portion of the production weld. The locations of the checks shall be specified by the Company. The chemical composition of the deposit shall comply with the requirements of paragraph 17.2.6 of this specification.

Engineering Gmup specJfi&n

e. Disbonding defects located by liquid penetrant or ultrasonic inspection that cannot be contained within a 25- mm-diameter circle shall be repaired. Linear indications revealed by liquid penetrant on edges which have been prepared for welding shall be repaired.

17.2.8 The inspection and acceptance criteria for weld overlay shall be as follows:


01 5-CH-1001

a. The overlay shall be examined for chemical composition in accordance with item(s) above in at least two points in each head, at least two points in each 3 m of shell and at least one point in a closing seam and each nozzle size. Such locations will be selected by the Company.

b. The analysis shall be used to calculate the ferrite content of the deposit. Acceptable limit is from 3% to 10%.

Rev

1

c. The surface shall be free from cracks and fissure defects. Any one circular defect shall not exceed 1.5 mm in diameter. The sum of the diameters of circular indications in any 90-mm diameter circle shall not exceed 4 mm or the minimum depth of the overlay, whichever is greater.

d. All areas of weld overlay containing defects in excess of the allowable limits, or whole composition of ferrite content does not satisfy the requirements of this specification shall be repaired.

Date

08-9-94

e. Repair or rejection of rejects shall be at the discretion of the Company. As a minimum, repaired areas shall be inspected with liquid penetrant in accordance with ASME E165. Defect scope and proposed repair and inspection procedures shall be submitted to the Company for approval prior to carrying out the repair.

Shest

27 of 36

17.2.9 The inspection and acceptance criteria for nozzles shall be as follows:

a. Clad nozzles purchased from other suppliers shall be ultrasonically inspected for integrity of cladding. Any of these nozzles with less than 90% bonded cladding or any unbonded area more than 600 mm2 shall be rejected.

b. Inspection of weld overlay shall be by the liquid penetrant method in accordance with ASME E l 65.

Engtneering Gmup Speaificath

c. All welds in sleeve linings of nozzles shall be tested with dry air (1.5 barg minimum) applied behind the linings using soap suds, after hydraulic testing. Any indication of air leakage shall be considered unacceptable.

17.3 Peauirements for Trav Installation


01 5-CH-1001

17.3.1 Tray details, including tray support beams, shall be designed to suit the size of the vessel, the operating loads and operating temperatures. All trays shall be designed for a maintenance load of 136 kgs (300 Ibs) concentrated at any point, and any other load indicated on vessel Drawings or as defined in paragraph 17.3.2 below.

17.3.2 Trays or tray decks shall be designed for a uniform live load of 49 kg/m2 (10 psf) or the weight of water at the maximum weir setting whichever is greater. Areas below downcomers shall be designed for a uniform live load of 313 kg/m2 (64 psf) or a liquid load of water equal to one-half the height of the downcomer, whichever is greater.

Rev

1

17.3.3 The maximum total support beam deflection for the specified loading shall not exceed LI900 or 4.8 mm (311 6 in.) whichever is smaller, where L is the length of the support beam.

17.3.4 The upward thrust due to vapour flow may be taken into consideration for cases where the liquid load is 59kglm2 (12 psf) or greater, provided sufficient information is available to accurately predict the amount of upward thrust.

Date

08-9-94

17.3.5 Trays shall be provided with internal tray manways to provide access to all parts of the trays. Tray manways shall be approximately aligned vertically and shall be operable from both top and bottom sides. Small tray sections may be used for manways.

Sheet

28 of 36

17.3.6 All removable trays shall be in sections which can be removed through the vessel manway. This type of tray shall be supported by a bar-type tray support ring. All tray and downcomer sections shall be securely clamped or bolted to the support rings, bolting bars and truss members, and sealed with a suitable gasket when, or where or as required.

17.3.7 Details of clamps and bolting shall be included in the tray Contractor's Drawings. Wedge-type tray and cap hold-downs

Specification Number Rev Date Sheet - - - - - -----w Gmup

S~eMcatbn 01 5-CH-1001 1 08-9-94 29 of 36

shall not be used unless specifically requested on the Company's vessel data sheets.

17.4 Identification

17.4.1 All material supplied shall be easily identified by indicating the order references and item numbers in white paint on:

a. Vessel shell.

b. Parts and accessories delivered separately.

c. All additional packages.

Specification Number Englnedng Gmup Rev Date Sheet SpmcaMn 01 5-CH-1001 I 08-9-94 30 of 36

APPENDIX 1

GRAPH FOR DETERMINING PERIODIC TIME T AND LIMITS FOR STATICIDYNAMIC DESIGNS OF COLUMNS

NClTES:- 1 1 HE COLUMN SHOULD BE DESIOJED H - UNCORRODED SHELL THICKNESS (MM) DYNAMICALLY IF THE WTERSECTiON Of */+I ' AND '/a IS ABOVE THE HEAW LINE

-

W - UNIT ERECTION WEIGHT polu] 2 FOR q0 < 15 STATIC DESIGN WIU. NORMAUY

D - COLUMN DIAMETER (M) BE ADEQUATE L - LENGTH OF COLUMN ABOVE HORIZONTAL 3 THEORETICALLY 7' WILL VARY W W THE

P U N UNDER CONSIDERATION COLUMN CONDITIONS FOR DETERMINATION OF STATIC OR DYNAMlC DESIGN REQUIREMENTS. COLUMN ERECTION CONOITIONS TO BE USED.

APPENDIX 2 NOZZLE LOADS FOR VESSELS (HORIZONTAL AND VERTICAL)

1.0 GENERAL

1 .I The criteria specified shall apply to nozzles above 2 in. NB for vessels constructed of steel or alloy steel.

1.2 Nozzles shall be designed to withstand forces and moments from the thermal expansion and dead weight of piping. Piping reactions shall be computed in conformance with ANSI B31.3 and shall be designed within the limiting criteria set by this standard.

1.3 The forces contained herein are considered minimum criteria in order to allow for an economical design of the connecting piping.

2.0 EXTERNAL FORCES AND MOMENTS ON NOZZLES

2.1 Each nozzle shall be capable of withstanding forces from external piping under the design conditions and considered to be acting at the intersection of nozzle and shell in corroded condition.

2.2 The value "D" in the formulae below is the nominal nozzle diameter in inches. The 13-values in the formulae depend on the rating of the nozzle flange and are as follows:

Flanae Ratina I Columns and Drums I

Engtneerfng Group Specification

Class 300 1 0.7 I

-


01 5-CH-1001

Class 150

Class 600 1 0.8 I

0.6

Rev

1

I

2.3 Nozzle in Shells

Longitudinal bending moment ML = 13.1 30.D2 Nm

Circumferential bending moment M0 = 13.100.D2 Nm

Resultant bending moment Mb = (ML2 + ~ e ' ) = 13.1 64.D2 Nm Torsional moment Mt = 13.1 50.D2 Nm

Class 900 Class 1500

Date

08-9-94

0.9 1 .O

Sheet

31 of 36

APPENDIX 2

Longitudinal shear force FL = 13.2000.D N

Circumferential shear force Fa = 13.1500.D N

Resultant shear force Fr = (FL' + ~ e ' ) % - - 13.2500.D N

Axial tension or compression force FA = 13.2000.D N

Nozzles in Formed Heads

Resultant bending moment Mb = (MX' + MZ') = 13.1 64.D2 Nm

Q KoC Engineering Gmup Specification

Torsional moment Mt = 13.150.D2 Nm

Resultant shear force F r - - (FX' + FZ')' = R.25OO.D N

Axial tension or compression force FA = 13.2000.D N

The above-mentioned loading shall be considered as being caused by 67% thermal and 33% dead weight load. These are piping loads onto the vessel. Pressure forces will be negligible.

The basic stress intensity limits shall be as per ASME Section VIII, Division 2, Appendix 4.

-


01 5-CH-1001

3.0 ADDITIONAL REINFORCEMENT

3.1 Whenever stresses based on paragraph 2.0 exceed the allowables, the Contractor shall apply a reinforcing pad.

Rev

1

3.2 Actual nozzle loadings from connected piping shall be submitted to the Approved Manufacturer when calculated loadings exceed those set forth in paragraphs 2.3 and 2.4 above. In this instance, the actual loadings and the proposed measures to be taken to incorporate these loads within the vessel design shall be submitted for Company approval.

Date

08-9-94

Sheet

32 of 36

APPENDIX 2

NOZZLE LOADING GEOMETRY

c v c n r a a

0 P m E cn 0

Notes: 1. In tension (100% for austenitic stainless steel), in compression per ASME at ambient temperature. 2. During hydrostatic test, 50% of the wind pressure must be taken into account. 3. Hydrostatic test pressure (see paragraph 10.3). 4. Design pressure for corresponding case. 5. Piping loads or other appurtenances. 6. In compression ASME stress at design temperature. 7. Other load checking may be necessary to cover following cases: fabrication, heat treatment, shop horizontal hydrotest,

lifting, shipment and load-out. During lifting special consideration shall be given to tower appurtenances lifted with the column.

Shop Hydrote st

01 5-CH-1001 REV. 1 08-9-94

APPENDIX 4

Uncorro ded

PRESSURE VESSEL TOLERANCES

90% Y.S(1)

X - - x (3) Ambient - - Per ASME

-

-

APPENDIX 4

PRESSURE VESSEL TOLERANCES

Q KK Englnearlng GIrwp S m n Specification Number 01 ~-CH-IOOI Rev I Date 08-9-94 sh.et 36 of 36

Specificrtlon Number Rev Date Sheet Englneerlng Omup Specriricatjon 01 5-CH-1001 I 06-9-94 36 of 36

APPENDIX 4

TOLERANCES - HORIZONTAL VESSELS

REFEREHCE WE COW-SEE TABLE BELOW I . \

PERMlSSlEKE ROTATlONOF: F W E WITH RESPECT TO VESSEL

CWTREUNES

NOTES: 1 ~ I D N O F ~ Y s ~ 0 1 T w

tNi WE OR WSSELCENTRE LINE 2. FUXFACEQtAWWYStiAlLBE

m R I U U W I T b 4 M W I U I U ) P U N E MTHlnlK'

3. L~~TO((TMOZZUSFIIOUM~W~~

APPe~mx '0' TOLERANCES - HORIZONTAL VESSELS pwe 2 OF.? -C ae-a-1-4

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015-CH-1001

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Transcript of 015-CH-1001