FPSO_Standard Specifications for Pressure Vessels.pdf

REVISION RECORD SHEET

D

10-Sep-99

Issued for use on the Bonga Project

DE F

D EF

SMM

C

23-Aug-99

Issued for Review

DE F

PW D

SMM

B

4-Jan-99

Issued for use on the Bonga Project

DE F

PWD

SM L

A

28-Dec-98

Initial Issue – For Client Review and Approval

DE F

PWD

SML

Rev.

Issue Date

PROJ. APPR.

SDDSI Approval

Description of Revision

ENGR APPR.

Shell Deepwater Development Systems, Inc. Bonga Project Document Title: Standard Specifications for Pressure Vessels Document BONGA - SPEC - ME - 010 Number

Rev. No. D

Page Total (Including this Cover) 20

Table of Contents C:\Bonga\Section VII (Technical Specifications)\Specifications\1.6 (Mechanical)\BONGAME010 (Sch T-Pressure Vessels)Rev D.docPage 1 of 20

Shell Deepwater Development Systems, Inc. Bonga Project Standard Specifications for Pressure Vessels

SECTION

Doc. Doc. No. Revision Date

TITLE

Bong Bongaa-SP SPEC EC-M -MEE-01 010 0 D 09/10/99

PAGE

1.0

SCOPE AND DEFINITIONS

3

2.0

CODE COMPLIANCE

3

3.0

MATERIALS

4

4.0

DESIGN

5

5.0

FABRICATION

14

6.0

INSPECTION AND TESTING

16

7.0

IDENTIFICATION STAMPING

17

8.0

DRAWINGS, FINAL REPORTS AND DATA SHEETS

18

9.0

PREPARATION FOR SHIPMENT

18

10.0

SUPPLEMENTAL SPECIFICATIONS FOR PRESSURE VESSELS IN SOUR SERVICE 19

C:\Bonga\Section VII (Technical Specifications)\Specifications\1.6 (Mechanical)\BONGAME010 (Sch T-Pressure Vessels)Rev D.docPage 2 of 20


1.0

2.0



SCOPE AND DEFINITIONS 1.1

These These standa standard rd specif specificat ications ions define define the the minim minimum um requi requirem rements ents for the the design design,, fabricat fabrication, ion, testing testing,, inspect inspection, ion, stamping and certification of welded unfired pressure vessels for use on the Bonga production platform by Shell Deepwater Development Systems, Inc., herein called "SDDSI."

1.2

The use use of these these stan standar dard d speci specific ficatio ations ns shall shall be limite limited d to "sweet "sweet"" servi service ce (0.0 (0.05 5 psia psia H2S partial pressure or o less) and operating temperature above -20 F, unless noted otherwise. When a vessel is designated as “sour”, the vessel will be required to meet the additional requirements found in Section 11.

1.3

All devi deviatio ations ns from from thes thesee specif specifica ication tions, s, the the purch purchase ase orde order, r, or the the drawin drawings gs shal shalll have have writte written n approva approvall of SDDSI.

1.4

For the the scop scopee of these these spec specific ificatio ations, ns, "pressu "pressure re vess vessels els"" are as defin defined ed by by the the ASME ASME Code. Code. Unless Unless specifi specifical cally ly specified by SDDSI as a Division 2 vessel, all pressure vessels shall be designed, constructed, inspected, and tested in accordance with the ASME Boiler and Pressure Vessel Code, Code, Section VIII, Division 1. All vessels defined by SDDSI as Division 2, shall be designed, constructed, inspected, and tested in accordance with the ASME Boiler and Pressure Vessel Code, Code, Section VIII, Division 2. Note that when requirements requirements of the applicable Division of the ASME Code conflict with those of this Specification, the more stringent of the two shall apply.

1.5

When When design designate ated d on the the Vessel Vessel Spec Specific ificatio ation n Sheet Sheetss as a MARI MARINE NE SYSTE SYSTEM M vessel vessel,, vessel vessel will will be requi required red to meet the additional requirements found found in Section 10, Item "M". When noted as an INDUSTRIAL SYSTEM vessel or not noted as a MARINE SYSTEM vessel, vessels will be required to meet only the requirements of Sections 1 through 9 of this specification and referenced codes.

1.6

These specifications are the confidential property of SDDSI and are intended for the use of SDDSI personnel and their designees only. The unauthorized unauthorized use of these specifications is strictly prohibited. Unauthorized use of distribution of these specifications shall be subject to p enalties and damage compensation to SDDSI.

1.7

All documents and/or codes referenced in this specification shall be latest edition.

1.8

Where specific manufacturers, CONTRACTORs, and/or designs are referred to in this specification insert “or SDDSI APPROVED equal”.

CODE COMPLIANCE 2.1

The desig design, n, material materials, s, fabrica fabrication tion,, inspect inspection, ion, testi testing, ng, stamp stamping ing and certif certificat ication ion of of pressure pressure vessels vessels,, includi including ng unfired steam boilers such as steam separators, shall be in accordance with the latest edition and subsequent addenda, of the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 or Division 2 as appropriate, (including other referenced Sections), herein referred to collectively as the "ASME Code" and with these specifications.

2.2

This specifi specificat cation ion is is inten intended ded to to supple supplemen ment, t, not not replac replace, e, the the requir requireme ements nts of the the ASME ASME Code. Code. Nothin Nothing g in the these se specifications should should be construed as allowing or requiring design criteria, materials, inspection, etc. less than that required by the ASME Code. The CONTRACTOR shall promptly notify SDDSI SDDSI if he finds any apparent contradictions between these specifications and/or SDDSI-furnished drawings and the ASME Code.



3.0



2.3

Piping, Piping, suc such h as sum sumps, ps, cros crosss drains drains,, etc., etc., outsid outsidee the norm normal al limit limitss of the the ANSI/A ANSI/ASME SME Code Code,, shall shall be fabrica fabricated ted as if it were within the ANSI/ASME Code limits of the vessel vessel to which it is attached. Pipe wall thickness, however, shall be designed in accordance with the requirements of the latest edition of ANSI/ASME B31.3, "Petroleum Refinery Piping Code Pressure Piping", using a minimum minimum corrosion allowance of 0.050 inches.

2.4

All pres pressur suree vesse vessels ls manu manufac factur tured ed in acco accordan rdance ce with with these these spec specific ificatio ations ns and and the ASME ASME Code Code shal shalll be registered and the Data Report filed with the National Board of Boiler and Pressure Vessel Inspectors.

MATERIALS 3.1

Material Materialss of cons constru tructio ction n for for vessel vesselss shall shall conf conform orm to to the ASME ASME Code Code and with with the the follow following ing requ requirem iremen ents ts unless otherwise indicated on SDDSI's drawings drawings or Engineering Design Documents. Documents. All materials shall be new. Material certificates for all plate, pipe, forgings, flanges and fittings shall be submitted to SDDSI for review.

3.2

Material Materialss for for vesse vessell shell shells, s, head headss and and other other press pressure ure parts parts shall shall com comply ply with with the the follow following ing:: 3.2.1

All plate plate shall shall comply comply with SA-516, SA-516, Grade Grade 70. 70. Plate 1 inch inch and and thicke thickerr shall shall be be normaliz normalized ed prior prior to fabrication.

3.2.2

For vess vessels els 24-in 24-inch ch O.D. O.D. and small smaller, er, ASTM ASTM A-333, A-333, Grade Grade 6 or SA-1 SA-106, 06, Grade Grade B pipe pipe may may be used used.. Pipe 1 inch and thicker shall be normalized prior to fabrication.

3.2.3

All plate plate 2" and thicke thickerr used used for pressure-re pressure-retaini taining ng parts parts shall shall be ultrasonica ultrasonically lly tested tested in accordan accordance ce with the requirements of SA-435 or SA-578 (Level 2), as required, prior to fabrication.

3.3

Reinfo Reinforcin rcing g pads pads shal shalll be made made of the the same same materia materiall used used for for the the shell shell or or heads heads as as approp appropria riate. te.

3.4

External External Attac Attachme hment ntss - Steel Steel plate plate used used for skirts skirts,, base ring rings, s, reinfo reinforce rcemen ments ts for skirt skirt openin openings, gs, sadd saddles les,, externa externall lugs and clips for platforms, ladders, insulation supports and pipe support pads shall be in accordance with SA516, SA-515, SA-285, SA-283, Grade C, or SA-36. Angles and bars shall shall be in accordance with SA-36. SA-36.

3.5

Rolled Rolled Plate Plate used used for for nozzle nozzless shall shall be be the the same same as as vesse vessell shell shell or head head materia materiall in whic which h the the nozzle nozzle is is to be be installed.

3.6

Pipin Piping, g, incl includ udin ing g tha thatt used used for for nozz nozzle les, s, shal shalll be SA-1 SA-106 06,, Grad Gradee B. B.

3.7

Flange Flangess shal shalll conf conform orm to ANSI/A ANSI/ASME SME B16.5. B16.5. Flange Flange materi material al shal shalll be be SA-1 SA-105. 05. SA-181 SA-181,, Class Class 70 may be substituted in ANSI/ASME Classes 150 and 300 i f SA-105 is not available.

3.8 3.8

Forg Forgin ings gs shal shalll be be SASA-10 105 5 or or SASA-18 181, 1, Clas Classs 70. 70.

3.9

Weld Fittin Fittings gs shal shalll be seam seamles lesss carbo carbon n steel steel to SA-23 SA-234, 4, Grade Grade WPB spec specific ificati ations ons and shal shalll confor conform m to ANSI/ASME B16.9. Fabricated fittings shall shall not be allowed.

3.10

Couplings Couplings and socket-we socket-weld ld fittings fittings,, where where specifi specified, ed, shall shall be SA-105 SA-105 and shall conform conform to ANSI/ASME ANSI/ASME B16.11-latest edition. Couplings shall be a minimum minimum of 6,000 pound fittings, and other socket-weld socket-weld fittings shall be a minimum of 3,000 pound fittings. Couplings for insulated insulated vessels shall be extra long with with full bore throughout.



4.0



3.11

Internals Internals - Vanes Vanes in vane-typ vane-typee mist mist elimin eliminators ators shall shall be in accorda accordance nce with SA-304 SA-304 or SA-31 SA-316. 6. Vanes Vanes in mist mist eliminators for stress-relieved vessels vessels shall be "L" grade. Material for all other parts of vane-type vane-type mist eliminators, and material for internal distributors, baffles, clips, braces and other non-pressure parts shall be in accordance with SA-516, SA-515, SA-285, SA-283, SA-106, SA-106, Grade B, SA-53, Grade B, SA-36 or SA-120 as appropriate.

3.12

Bolting - For flanged flanged piping piping systems, systems, stud bolts, threaded threaded over over their length, length, shall shall be used. used. Stud bolts shall shall be steel to SA-193, Grade B-7 specifications. Nuts shall be heavy hexagon, semi-finished to SA-194, Grade 2H. All studs and and nuts shall be cadmium-plated cadmium-plated in accordance with with ASTM A165, Type TS, minimum. Bolting which has been further coated with yellow chromate to MIL-QQ-P-416 will be acceptable. Note that the color of these bolts will be gold or bronze, not silver. Studs and nuts shall not be sandblasted prior to application applic ation of paint. Stud length shall be determined in accordance with ANSI/ASME B16.5 such that a minimum of one thread and a maximum of three threads shall be exposed beyond the nuts.

3.13

Gasketing 3.13.1

Gaskets Gaskets for raised-face raised-face flanges flanges shall shall be spiral-woun spiral-wound d non-asbestos non-asbestos materia materiall with SA-304 SA-304 stainless stainless steel steel windings.

3.13.2

Gaskets Gaskets for ANSI/ASME ANSI/ASME Class Class 900, 900, ring-type ring-type joint joint flanges flanges shall shall be soft soft iron, Type R, Identifi Identificatio cation n Mark "D", cadmium plated.

3.13.3

Gaskets Gaskets for ANSI/ASME ANSI/ASME Class Class 1500 1500 ring-type ring-type joint joint flanges flanges shall shall be soft soft iron, Type Type RX, Identifica Identification tion Mark "D", cadmium plated.

3.13.4

Gaskets Gaskets for ANSI/ASME ANSI/ASME Class Class 2500, 2500, ring-typ ring-typee joint flanges flanges shall shall be low carbon carbon steel, steel, Type RX, RX, cadmium plated.

D E S I GN 4.1

General Requirements 4.1.1

Pressure Pressure vessels vessels shall shall be designed designed to meet meet the operating operating and and design design conditio conditions, ns, and and comply comply with with all other requirements, listed on the specification sheets, indicated on SDDSI's drawings, or stated in the Engineering Design Documents.

4.1.2

All pressu pressure re vessels vessels shall be cylindric cylindrical, al, and and shall shall be installe installed d in either either the the vertical vertical or horizontal horizontal position as indicated on the Engineering Design Documents (EDD)and/or drawings. Horizontal vessels may be either single or double barrel, as specified in the EDD’s.

4.1.3

All vessel vessel heads heads shall be ellipsoi ellipsoidal dal or or torispher torispherical ical (spherically (spherically dished). dished). For vesse vessels ls 24-inch 24-inch O.D. and smaller, weld caps which which comply with the requirements of the ASME Code may be used. A toriconical or conical head shall be provided where a conical bot tom is shown on SDDSI drawings. Hemispherical heads shall not be used. Flanged or quick-opening closures closures shall be provided where specified on SDDSI drawings or Engineering Design Documents.

4.1.4

Detailed Detailed vess vessel el design design,, including including internals, internals, shall shall be the the CONTRACTO CONTRACTOR's R's responsib responsibility ility.. The drawin drawings gs submitted by SDDSI, if applicable, to the CONTRACTOR are not intended to cover complete details. CONTRACTOR shall make detailed calculations covering the design of pressure vessels shown on SDDSI's drawings and shall prepare his detailed shop drawings. drawings. CONTRACTOR shall submit to





SDDSI all shop drawings for review. CONTRACTOR shall also submit welding procedures, welding qualification records and detailed calculations for review. review. If CONTRACTOR's welding procedures have been previously approved by SDDSI, then CONTRACTOR need only submit a copy of SDDSI's approval letter, along with CONTRACTOR's proposed weld map. No subsequent revision may be issued for fabrication without transmitting the same to SDDSI. See Paragraph 4.11 for shop drawing requirements. 4.1.5

4. 2

CONTRACTOR CONTRACTOR shall shall calcula calculate te and show on the the prelimina preliminary ry and and final final drawings drawings the actual actual shipping shipping weight, including installed internals, of each vessel based on fabricated thicknesses.

Vessel Design Pressure vessels shall be designed in accordance with the ASME Code and i n accordance with the following additional requirements: 4.2.1

Pressure Pressure vesse vessels ls shall shall be design designed ed to withs withstand tand the the loadings loadings exerted exerted by internal internal or externa externall pressure, pressure, weight of the vessel and contents (with the vessel filled to the uppermost level control nozzle centerline and/or the uppermost spillover weir, with a liquid having the maximum specified density, but not less than 64 lb/ft3), wind, reaction of supports, impact, temperature, and production facility motion.

4.2.2

Vessels, Vessels, includin including g skirts skirts or saddles saddles,, and other appurten appurtenances ances,, shall shall be design designed ed in accordance accordance with with the the ASME code for the combination of loadings as specified below and per the project motion and loading criteria. The project structural specifications provide conceptual loading criteria. The final loading criteria will be determined by the Topsides CONTRACTOR based on the accelerations and deflections provided by the Hull CONTRACTOR. (See BONGA-STUDY-ME-010 – FPSO Mot ion Study.

4.2.3

A.

Intern Internal al and/ and/or or extern external al pres pressur sure, e, weigh weightt of contain contained ed fluids fluids,, and and vess vessel el and and appurt appurtena enance nce weights.

B.

Storm wind loads.

C.

Operating wind loads.

D.

Storm motions an and de deflections.

E.

Operating ing motion ions and deflec lectio tions.

F.

Assembly and mating motion.

G.

Tow out storm conditions

H.

Modu Module le Tran Transp spor orta tati tion on on Barg Barge, e, if appli ppliccable able..

The loading loadingss outlined outlined above in Section Section 4.2.2 shall shall be combine combined d with with the following following guideli guidelines: nes: 1.

Storm Storm load loadin ings gs B, D, D, and and G may may be con consi side dere red d sim simila ilarly rly to ear earth thqu quak akee load loadss in the the ASME ASME code when adding to loading A.

2.

Operati Operating ng loadin loadings gs C and and E shou should ld be added added to loadin loading g A witho without ut the 1.20 1.20 fact factor or in in allo allowa wable ble





stress. 3.

Asse Assemb mbly ly and and mati mating ng loadi loading ng F shou should ld be be cons conside idered red to act act on on the the dead dead weig weight ht of of the the vess vessel el and components without any internal pressure or fluid and without the 1.20 factor in allowable stress.

4.

Tow-o Tow-out ut sto storm rm loa loadi ding ng G and and mod modul ulee trans transpo porta rtati tion on loa loadi ding ng H sho shoul uld d be con consi side dered red to to act act on the dead weight of the vessel and components without any internal pressure or fluid, but with the 1.20 factor in allowable stress.

4.2.4

Pressure Pressure vesse vessels ls including including skirts, skirts, saddles, saddles, and lifting lifting lugs shall shall be designed designed not not to be overst overstresse ressed d during all handling. handling. The CONTRACTOR shall consider consider appropriate loadings including including loading/unloading for shipment, raising/lowering a vertical vessel, etc. See Paragraph 4.4.5 for lifting lug requirements. Consider the reactions due to the weight of the vessel, vessel, all appurtenances, and all internals, and the reaction due to the lifting lugs and skirt or saddles.

4.2.5

For horizon horizontal tal vessel vesselss greater greater than than 36" 36" O.D. in which which "sloshing "sloshing"" is possible possible,, the CONTRACTOR CONTRACTOR shall shall base his design of of the internals internals and and pressure-contain pressure-containing ing components components on the actual actual resonant resonant "sloshing" "sloshing" forces, which shall not be less than two (2) times the specified deck accelerations. The CONTRACTOR shall design these vessels in such a way as to minimize and/or mitigate the sloshing effects, as discussed in BONGA-STUDY-ME-010. These forces shall be in addition to the forces specified in Paragraphs 4.2.1 through 4.2.3.

4. 3

4.2.6

Internal Internal or extern external al stiffener stiffener rings shall be installe installed d as required, required, subject subject to SDDSI's SDDSI's review. review.

4.2.7

The thickn thickness ess of vessel vessel shells, shells, heads heads and other other pressu pressure-con re-containin taining g parts parts shall shall be computed computed as set set forth in the ASME Code for the design pressures and temperatures indicated on the Equipment Sizing Specification and/or SDDSI's drawings.

4.2.8

Unless Unless otherwis otherwisee specified specified,, a 1/8-inch 1/8-inch corrosio corrosion n allowan allowance ce is require required d for carbon carbon steel steel vesse vessell shells, shells, heads and other pressure pressure parts. The same corrosion allowance allowance shall also be added to shell strength members, and any other carbon steel internal part that contacts the process fluid (except mist eliminators or bubble caps), unless otherwise specified on t he drawings.

4.2.9

The minimu minimum m thickne thickness ss of of vessel vessel shells shells and and heads heads shall shall be 1/4 1/4 inch, inch, exclusiv exclusivee of any any corrosio corrosion n allowance, except where otherwise noted on SDDSI's drawings.

Vessel Connections Nozzles, manholes and other other connections shall be designed designed in accordance with the the ASME Code and with the provisions listed below. 4.3.1

General 4.3.1.1

All vess vessel el conne connectio ctions ns are are to be flanged flanged conn connect ection ionss unles unlesss otherw otherwise ise spec specifie ified. d. Threade Threaded d connections, where specified, are limited to the following sizes and applications: 1.

1/2 inch inch and 3/4 inch NPT for for instru instrumen mentatio tation n conne connectio ctions, ns, sample sample taps and vents. vents.



2.

4.3.2



2 inch inch NPT NPT and and small smaller er in nonnon-hy hydroc drocarb arbon on serv service ice (air, (air, wate waterr and low pressur pressuree steam less than 50 psig).

4.3.1.2

Flanges Flanges for ANSI/A ANSI/ASME SME Class Class 600 600 and and below below shall shall be raised raised face, face, with a serrated serrated spiral spiral finish. Flanges for ANSI/ASME Class 900 and above shall be RTJ.

4.3.1.3

All nozzles nozzles and couplings couplings shall shall be positioned positioned as indica indicated ted on on shop shop drawings drawings and accurately accurately located in elevation from a common base line and radially from the center line of the vessel after the shell sections have been assembled and welded together. CONTRACTOR shall ensure nozzles designated for relief valves and couplings designated for relief valve pilot connections are l ocated upstream and clear of any mist eliminator; and couplings designated for thermowells are located in the liquid section of the vessel, if applicable.

4.3.1.4

Weldolets, Weldolets, threadolets threadolets and sockolets sockolets shall shall not not be used to make make nozzle nozzle conne connection ctionss to the vessel shell or head.

4.3.1.5 4.3.1.5

The mini minimu mum m size size open opening ing in the the vesse vessell shell shell or or head head shall shall be be 1/2 1/2 inch. inch.

4.3.1.6 4.3.1.6

The corro corrosio sion n allowa allowance nce for for carbon carbon stee steell nozzles nozzles and and manhol manholes es shall shall be at least least equa equall to that specified for the vessel shell.

4.3.1.7 4.3.1.7

Pad-ty Pad-type pe or builtbuilt-up up nozzl nozzles es with with studs studs tappe tapped d into the the flange flange are acce acceptab ptable le only only for handholes and cleanout openings, unless otherwise specified or specifically authorized in writing by SDDSI.

4.3.1.8

Nozzles, Nozzles, conn connect ections ions and manw manway ay neck neckss shall shall not be be located located on a vessel vessel seam seam,, or so close close as to result in weld-metal weld-metal overlap. A 2" minimum clearance clearance between nozzle and seam seam shall be maintained unless otherwise approved by SDDSI.

4.3.1.9

Elbows Elbows,, tees and and other other weld weld fittin fittings gs shal shalll be of the the same same schedu schedule le as the the pipe to to which which they they are attached.

4.3.1.10

ANSI/ASME ANSI/ASME B31.3 B31.3 Code for Pressure Pressure Piping, Piping, latest latest edition, edition, shall shall be the the authority authority for calculating the wall thickness of piping outside the limits of the ASME Code for vessels. The minimum corrosion allowance for such piping shall be 0.050 inches.

Nozzles 4.3.2.1 4.3.2.1

Flange Flangess used used in nozzl nozzles es shall shall be forg forged ed steel steel weldin welding g neck neck or long weld welding ing neck neck type, type, bored to the same same inside diameter diameter as the the neck. The flange end end of all special forgings forgings shall shall comply with the dimensional requirements of ANSI/ASME B16.5. The CONTRACTOR shall ensure that the design of all such forgings allows adequate access for stud nuts (and wrenches), and that the forgings be spot faced, if necessary, in accordance with Paragraph 6.6 of ANSI/ASME B16.5. Slip-on-type flanges are not desired but may be used in large diameter, low pressure service when approved by SDDSI. Flanges used on 1 1/2 inch and smaller pipe schedule nozzles shall be socket-weld type.

4.3.2.2 4.3.2.2

Nozzle Nozzle neck neckss shall shall be desi designe gned d in accord accordanc ancee with with the ASME ASME Code Code plus plus the spec specifi ified ed corrosion allowance. In addition, the minimum nozzle neck thickness shall shall be in accordance with the following table:




Nominal Neck Size 2" and and smal smalle lerr (Ve (Vesssel MAWP MAWP < 100 1000 0 psig psig)) 2" and smal smalle lerr (Ve (Vesssel MAWP MAWP > 100 1000 0 ps psig) ig) 3" thru 8" 10" and 12" 14" and larger

4.3. 4.3.3 3

4.4


Minimum Thickness Sch Schedu edule 80 Sche Schedu dule le 160 160 Schedule 80 0.500 inches Standard wall pipe plus the corrosion allowance

4.3.2.3

Nozzles Nozzles 2" and and smal smaller ler shall shall be long long welding welding neck type. type. Where projection projectionss preclu preclude de the use of LWN flanges, flanges, or where specified by SDDSI, such nozzles shall be reinforced with gusset plates in at least least two directions. directions. The CONTRACTOR shall provide similar similar reinforcement on larger size nozzles where required, or where specified by SDDSI.

4.3.2.4 4.3.2.4

Bolt hole holess in flange flangess shall shall stradd straddle le or paral parallel lel vess vessel el cente centerlin rlinee ("two ("two holed"). holed").

4.3.2.5 4.3.2.5

In gener general, al, nozz nozzles les may may proje project ct inside inside the the vessel vessel to the the extent extent of the the reinfor reinforcin cing g area permitted by the ASME Code, except that the specified corrosion allowance may not be used in calculating the amount of metal available for reinforcing. Vessel nozzles shall have internal projections and vortex breakers per SDDSI EDDs and/or drawings. drawings. Vessel drains shall be flush and ground smooth with the inside surface of the vessel.

4.3.2.6 4.3.2.6

Nozzle Nozzle projec projection tionss from from vesse vessell O.D. to flan flange ge face face shall shall be a minim minimum um of 6 inche inchess for nozzle sizes 6 inches and smaller and a minimum of 8 inches for nozzle sizes 8 inches and larger.

4.3.2.7 4.3.2.7

In the the event event a vesse vessell has insul insulati ation on or firefire-proo prooff coating coatingss (per (per SDDSI's SDDSI's draw drawing ing or or Engineering Design Data sheet), add to the minimum nozzle projections an amount equal to the thickness of the planned insulation or fire-proofing.

4.3.2.8 4.3.2.8

All coupl coupling ing proje projectio ctions ns are are to be 1/2 inch inch plus insu insulati lation/ on/fir fire-p e-proof roofing ing thick thicknes ness. s.

Man Manways ays an and Han Handh dhol olees 4.3.3.1 4.3.3.1

Manwa Manway y size size shall shall be as spec specifie ified d on SDDSI' SDDSI'ss P&IDs P&IDs,, EDDs, EDDs, or vess vessel el draw drawing ings. s. The minimum size size shall be 24 inches I.D. for vessels 48” nominal nominal diameter and larger. For vessels less than 48” diameter, the manway I.D. shall be one-half (1/2) the vessel diameter, unless not allowed per the ASME vessel code, in which case the maximum size allowed by the ASME vessel code shall be used.

4.3.3.2 4.3.3.2

Blind Blind flanges flanges with with boltin bolting g and gask gaskets ets shal shalll be provide provided d for handho handholes les and and manwa manways ys..

4.3.3.3 4.3.3.3

Manwa Manway y cover cover plates plates shal shalll be hing hinged ed or davited davited and equippe equipped d with with a hand handle. le. Hinges Hinges and/or davits shall be equipped with 1/4-inch grease fittings. fittings. Drawings of hinged hinged or davited assemblies shall be included with the vessel shop drawings for SDDSI's r eview.

Vessel Su Supports rts an and Lif Liftting Lu Lugs Vessel supports and lifting lugs shall comply with the requirements of the ASME Code and with the following





requirements. 4.4.1

Design Design Conside Consideration rations. s. Vessel Vessel support supportss shall shall be design designed ed to support support the the vesse vessell and and content contentss when when subjected to the combined static and dynamic loads described in Paragraphs 4.2.1, 4.2.2, 4.2.3, 4.2.4, and 4.2.5.

4.4.2

Materials. Materials. Materials Materials used used in the the constr construction uction of the the skirt skirt rings, rings, saddles, saddles, and and supports supports shall shall conform conform to the appropriate paragraph of Section 3.0 of this specification.

4.4.3

Vertical Vertical Vessels. Vessels. All vertical vertical vessels vessels shall be provided provided with with skirts. skirts. Skirts shall be of 1/4-inch 1/4-inch minimum wall thickness and shall be attached to the vessel with a full penetration weld, or shall be seal welded to the vessel. vessel. Skirts shall comply with with the following: 4.4.3.1

Skirts Skirts on vertic vertical al vessel vesselss shall shall be designed designed in accordan accordance ce with with the the followi following ng table, table, unle unless ss otherwise specified on vessel vessel drawings. Where practical, vessels with flanges inside inside the skirt shall have two openings. Vessel Diameter Less than 2'-0" 2'-0" or greater but less than 3'-0" 3'-0" to 5’-0” 5'-0" or greater

Skirt Height 2'-0" 2'-0"

Access Openings 1 - 6" diameter or larger 1 - 12" x 18" oval

2'-6" To be determined by Contractor

2 - 12" x 18" oval minimum 2 – 24” diameter minimum

4.4.3.2

Access Access openings openings are to be reinforced reinforced along the perimeter perimeter of the the openin opening g for for vessel vesselss of 3'-0" O.D. or greater.

4.4.3.3 4.4.3.3

The botto bottom m of the skirt skirt shall shall be be provid provided ed with with a base base ring. ring. Base Base ring ring shall shall not not have have bolt bolt holes unless approved by SDDSI.

4.4.3.4 4.4.3.4

Skirts Skirts on on vertic vertical al vesse vessels ls shall shall be equi equippe pped d with adeq adequat uatee skirt skirt vents vents to prev prevent ent the the accumulation of gases gases within the skirt. These skirt vents shall be placed as high high as practical on on the vessel vessel skirt. skirt. Normally, Normally, four 1-inch 1-inch minimum minimum diameter diameter vents vents are are adequate. adequate.

4.4.4

Horizontal Horizontal Vessels. Vessels. Horizontal Horizontal pressure pressure vessels vessels shall be provide provided d with with structural structural steel cradles cradles and and supports as shown on vessel drawings and/or as required by Paragraphs 4.2.1, 4.2.2, 4.2.3, 4.2.4, and 4.2.5.

4.4.5

Lifting Lifting Lugs. Lugs. Lifting Lifting lugs lugs shall shall be provided provided to facilitate facilitate handlin handling g of the vesse vessel. l. Lugs Lugs shall shall be designed designed in accordance with the fol lowing: 4.4.5.1

All vesse vessels ls shall shall be design designed ed for for single single point point lift withou withoutt the use of any any spreader spreader bars or lifting frames.

4.4.5.2

The desig design n factor factor of of safety safety shall shall be 4.0 based based on the the static static weight weight of of the the vessel vessel including including internals.

4.4.5.3

Lugs Lugs on insulate insulated d vessels vessels shall shall be long long enou enough gh to allow allow sling sling "hookup" "hookup" after after insulatio insulation n is





installed without damage to the insulation.

4. 5

4.4.5.4

Lugs Lugs shall shall be desig designed ned for use use with with standard standard shackles shackles.. CONTRAC CONTRACTOR TOR shall shall indicate indicate on the vessel shop drawings and shipping papers the shackle used in the design.

4.4.5.5 4.4.5.5

Lugs Lugs shall shall be desi designe gned d not to bend bend when when used used with with appro appropria priate te length length slin slings gs..

4.4.5.6 4.4.5.6

No welds welds shall shall be perm permitte itted d to cover cover the the vess vessel el circu circumf mfere erenti ntial al seam seams. s.

4.4.5.7

Shop fabricati fabrication on drawin drawings gs shall shall show show lift lift lug design, design, along along with with required required shac shackle kles, s, slings slings,, etc.

4.4.5.8

Vertical Vertical vessel vesselss that that will will be be shipped shipped horizontally horizontally shall shall have have an additional additional lifting lug located located near the bottom head-shell head-shell seam. Lugs shall shall be designed to allow either horizontal or vertical lifts.

Vessel Internals 4.5.1

General 4.5.1.1

The minim minimum um thick thicknes nesss for all all interna internals ls inclu including ding plate, plate, shapes shapes and and pipe pipe shall shall be 1/4 inch inch unless otherwise specified.

4.5.1.2

Internal Internal flange flanges, s, where where required, required, shall shall be fabricated fabricated from 1/4-inch 1/4-inch plate minimum minimum with fullface gaskets. These flanges shall be cut and holes drilled, not torch cut. Adequate bolting shall be provided.

4.5.1.3 4.5.1.3

Unless Unless othe otherwi rwise se noted noted on vess vessel el drawin drawings, gs, all all remova removable ble intern internals als shal shalll be sized sized to be removed through the vessel manholes.

4.5.1.4 4.5.1.4

The CONTR CONTRACT ACTOR OR shall shall provi provide de pressu pressure re equaliz equalizatio ation n vents, vents, or equi equival valent ent,, around around vessel internals not designed for the maximum possible pressure differential.

4.5.2

Inlet Inlet Devices Devices.. Where show shown n on SDDSI’ SDDSI’ss drawing drawings, s, Enginee Engineering ring Desig Design n Docume Documents nts,, or Data Sheets, Sheets, inlet devices shall be furnished and installed by the CONT RACTOR in the shop.

4.5.3

Gas Outlet Devices. Devices. Where shown shown on SDDSI's SDDSI's drawing drawings, s, Engin Engineering eering Design Design Docume Documents, nts, or Data Data Sheets, specialty gas outlet devices shall be furnished and installed by the CONTRACTOR in the shop. Where shown on SDDSI's drawings, Engineering Design Design Documents, or Data Sheets, mist eliminators shall be furnished furnished and installed by the CONTRACTOR in the shop. Unless otherwise indicated, mist eliminators, eliminato rs, where used, shall be of the parallel plate or "vane" type. Wire mesh mist eliminators are not acceptable, unless specifically indicated by SDDSI. If wire mesh mist eliminators are specified by SDDSI, they shall be designed to fit through the manway and shall be installed by the CONTRACTOR complete with top and and bottom "expanded metal" grids. Mesh and attaching wire shall be 316 stainless steel. Mesh density shall shall be at least 11 pounds per cubic foot and mesh thickness shall be at least 6 inches. Detail drawings drawings of mist eliminators shall shall be submitted to SDDSI as part of the shop drawings set.

4.5.4

Anodes. Anodes. Where shown shown on SDDSI-furni SDDSI-furnished shed drawings drawings or stated stated in the the Engineer Engineering ing Design Design Docum Documents, ents, anodes shall be furnished and installed by the vessel CONTRACTOR. The amount of anode shall be





0.75 lb. of zinc anode per square foot of water wetted area. This wetted area determination will ignore any vessel coatings. The anodes shall be designed either to be bolted to a mounting strap or threaded into a half coupling for ease of replacement in the field. The attachment half-couplings (where used) shall be welded to the vessel prior to, and the anodes installed after, stress relieving. 4.6

4.7

4. 8

Toleran Tolerances ces.. The toleran tolerances ces of this this section section are in additio addition n to those those specif specified ied in the ASME ASME Code. Code. 4.6.1

Unless Unless noted noted otherwis otherwise, e, all eleva elevation tion dimens dimensions ions on on SDDSI-furn SDDSI-furnishe ished d drawings drawings are to the the bottom bottom of the base plate. Unless otherwise directed by SDDSI, the CONTRACTOR shall establish a "work line" displaced a nominal distance from the vessel shell-to-head shell-to-head seam. Thereafter, all dimensions shall shall be referenced to this work line.

4.6.2

Base plates shall be perpend perpendicular icular to the vertical vertical centerline centerline of vessel vessel within within a tolerance tolerance of plus plus or minus 1/8 inch on the diameter.

4.6.3

For vertica verticall vessels vessels,, the deviation deviation from verticality verticality shall not exceed exceed the lesser lesser of 1/2o or 1/2 inch.

4.6.4 4.6.4

Nozzle Nozzless - Nozzl Nozzles es shal shalll be plum plumb b and leve levell in any any direct direction ion with within in 1/2 . The tolerances for nozzle location shall be plus or minus 1/8 inch for elevation (or longitudinally for horizontal vessels), 1/2 o for orientation, and plus or minus 1/8 inch for projection, measured measured from the vessel O.D. The tolerance for the dimension between centerlines of nozzles or couplings used for level gauges, level controls, etc., shall be 1/16 inch.

4.6.5

Internals, Internals, such such as still still wells, wells, equalizi equalizing ng pipes, pipes, or spillovers spillovers shall shall be plumb plumb in any any direction within within 1/2 .

4.6.6

Weir plates plates and and boxes shall shall be level level and and plumb plumb within within plus plus or minus minus 1/16 1/16 inch inch and shall be within within plus plus or minus 1/8 inch of the height and plus or minus 1/4 inch of the location as shown on the shop drawings.

4.6.7

Out-of-roun Out-of-roundnes dnesss toleranc tolerances es shall shall be in accordance accordance with UG-80 of the the ASME ASME Code. Code.

o

o

Insula Insulation tion Suppor Supports. ts. When When insul insulatio ation n is spec specifie ified d on SDDS SDDSI's I's draw drawing ingss or Engi Enginee neering ring Design Design Docu Docume ments nts,, CONTRACTOR shall provide insulation supports according t o the following: 4.7.1

Vertical Vertical Vessels Vessels.. Support Support rings rings shall shall be furni furnished shed,, shop-w shop-welded elded circumferen circumferentially tially around around the vessel vessel at approximately 12-foot centers vertically as detailed on the vessel drawings.

4.7.2

Horizontal Horizontal Vessels. Vessels. Two support support rings shall be furnished, furnished, one near each head, shop-weld shop-welded ed circumferentially around the vessel as detailed on the vessel drawings.

4.7.3

Projection. Projection. The projection projection of all insulation insulation support support rings rings shall be 1/2 1/2 inch inch less than the design design thickness of the insulation.

4.7.4

Welding. Welding. All weldin welding g shall shall be completed completed prior to to stress stress relievi relieving, ng, if required required.. Where Where insulat insulation ion pins pins are specified, they shall be attached to the vessel using a welding procedure in accordance with Section IX of the ASME Code. No welding shall shall be done on vessels vessels after stress relieving without SDDSI approval.

Instruments and Controls





CONTRACTOR shall install supports on vessel for fusible plug loop. 4.9 4.9

Ladde adders rs,, Cag Cages es,, Pla Platf tfor orm ms an and Sta Stair irss CONTRACTOR shall furnish rigidly constructed external ladders, cages, platforms and stairs when specified on SDDSI's drawings or on Engineering Design Documents or per applicable structural or human factors project specifications. Ladders, cages, platforms and stairs shall conform to the following specifications and with applicable project structural specifications. 4.9.1

Ladders Ladders shall shall have a minimu minimum m width width of 16 inches. inches. Rungs Rungs shall shall be 1.315 1.315 inch inch minimu minimum m diameter. diameter. Ladders 15 feet tall or taller shall be equipped with cages beginning approximately 7 feet above deck or floor level.

4.9.2

Platforms Platforms and and stairs stairs shall shall be made made of of a bar grating grating with a nonslip nonslip design. design. Platforms Platforms shall have a minimum width of 36 inches. All stairs and platforms shall be equipped with handrails, knee rails and kickplates. All pipe penetrations shall be made with pipe sleeves through grating.

4.9.3

Ladders, Ladders, cages, cages, platform platforms, s, stairs, stairs, handrail handrails, s, knee knee rails, rails, kickplates kickplates,, bolts and nuts nuts shall shall be hot-dip hot-dipped ped galvanized (per ASTM A-123) after all welding is complete.

4.9.4

Support Support clips clips for for ladders, ladders, platforms platforms and stairs shall be shop shop welded welded to the vessel. vessel. If the vessel vessel is to be stress relieved, supports shall be welded prior to stress relieving.

4.9.5

On insulat insulated ed vessels vessels,, all ladder, ladder, platform platform clips, etc., shall shall be be long enough enough to allow allow all all bolting bolting to be beyond the insulation limits.

4.9.6

CONTRACTOR CONTRACTOR shall also furnish furnish internal internal ladders when specified specified on on SDDSI's SDDSI's drawings, drawings, Engineering Engineering Design Documents or when required for vessel maintenance.

4.9.7

After fabrication fabrication and and galvani galvanizing zing of ladders ladders and and platforms, platforms, including including all bolts and nuts, nuts, these these items items shall be completely fitted to the vessel in the shop to ensure proper fit, then disassembled for shipping after SDDSI’s optional verification.

4.10

Structura Structurall Steel Skids - Structura Structurall steel steel skids skids shall shall be designe designed d and fabrica fabricated ted in confo conforman rmance ce with with applica applicable ble project structural specifications.

4.11

Shop Drawings The shop drawings shall be complete and of sufficient detail to fully describe the pressure vessel and all appurtenances. The following must be shown on the the shop drawings: -

Material Material specifi specification cation (and grade or class) class) of all parts, parts, includin including g referenc referencee to UT UT and/or and/or normal normalizing izing requirements, if applicable. Thic Thick kness ness of shell ell and and head headss Type heads Typ Type of of fl flanges or noz nozzzles les Shippin Shipping g weig weight, ht, hydros hydrostat tatic ic test test weigh weight, t, and and operati operating ng weigh weightt Code Code unde underr whi which ch the the ves vesse sell was was buil builtt Sketch Sketch of all all data data plate plate mark marking ingss (code (code tag) tag) with with all all neces necessar sary y inform informatio ation n Weld symbols



5.0



Dime Dimens nsion ionss and and tole tolera ranc nces es for for all all ves vesse sell conn connec ectio tions ns Comple Complete te detai details ls of all all inter internal nalss (both (both dimen dimensio sional nal and and mate materia riall specif specifica ication tions) s) Deta Detail il of manw anway dav davits its or or hin hing ges Design data Cons onstru tructio ction n not notees an and det detai ails ls Padeye Padeye details details including including designation designation of planne planned d shackle shackless and and minimu minimum m required required sling length. length. Detailed dimensional drawings of ladders, cages and platforms. Any other information required by SDDSI to verify the vessel design.

FABRICATION 5.1

General General - The CONTRACTO CONTRACTOR R shall shall neith neither er comm commence ence fabricati fabrication on of of the the vesse vessell witho without ut the the prior prior notificat notification ion to SDDSI, nor shall the CONTRACTOR commence any fabrication prior to the incorporation of comments, if received from SDDSI, on the shop drawing drawing set. Further, the CONTRACTOR shall not incorporate incorporate any material into the fabrication of the vessel until such time that the mill certificates covering such material have been submitted to SDDSI for review, and the time allotted for review per the Project Administration Instructions has expired. When the CONTRACTOR intends to have have a vessel partially assembled by a third party subcontractor subcontractor in accordance with with the ASME Code, or use use any other subcontractor, subcontractor, the CONTRACTOR CONTRACTOR shall clearly state that that fact on the drawings. drawings. All items of this specification specification shall apply to the third-party subcontractor, including the notification of SDDSI prior t o the commencement of vessel fabrication.

5.2

Welding Welding - All All weldi welding, ng, the the qualif qualifica icatio tion n of weldi welding ng proce procedur dures, es, and and the the qualifi qualificat cation ion of of welde welders rs and and weldin welding g operators shall be in accordance with the latest edition of Section IX of the ASME Code, and its subsequent addenda, except as restricted by the following requirements. 5.2.1

All welding welding shall be done done by the shielded-m shielded-metal-a etal-arc rc (SMAW), (SMAW), SUBMERGED-AR SUBMERGED-ARC C (SAW) (SAW) or the flux-cored-arc (FCAW) processes. processes. The flux-cored-arc process is restricted to the use of electrode classifications using CO2 or argon-CO2 mixtures for shielding. shielding. Self-shielding FCAW FCAW electrodes are not allowed. The use of short-arc welding (GMAW) shall be limited to root passes unless unless otherwise specifically specificall y approved by SDDSI on an individual-job basis. Oxyacetylene or forge welding shall not be permitted. Other welding processes may be approved by SDDSI on an individual basis.

5.2.2

Welding by the the submerge submerged-arc d-arc (SAW) process process is permissib permissible le only only by fully automatic automatic or semiautom semiautomatic atic equipment.

5.2.3

Longitudin Longitudinal al and circumfere circumferential ntial joints in vessel vessel shells shells and heads heads shall be full full penetration penetration,, doubledoublewelded, butt type, with "V"- or "U"-type grooves, wherever wherever possible. Where the design requires the use of single-welded, butt joints, the weld detail employed shall be such as to ensure a full penetration joint.

5.2.4

Backup Backup strips strips may may be be used used only only on on the closing closing head head joint. joint. Use of of such such backup backup strips requires requires prior prior approval by SDDSI.

5.2.5

Nozzles, Nozzles, coupling couplings, s, and manho manholes les shall shall be attache attached d to the vesse vessell with full full penetrati penetration on welds welds through through the vessel wall, including any reinforcing pads or plate which may may be used. On Division 1 vessel shells or heads with wall thicknesses over 2 inches, partial penetration coupling connections of at least 2 inches in depth will be considered when when the CONTRACTOR demonstrates code acceptability. The use of weldolets, threadolets and sockolets is specifically pr ohibited.

5.2.6

All longitu longitudinal dinal seams seams shall shall clear clear nozzles, nozzles, clips clips and and other other external external parts by by a minim minimum um of 2 inches. inches.





Longitudinal seams for vertical vessels preferably shall be located 180 o apart and for horizontal o vessels shall be located a minimum of 30 above the horizontal plane through the centerline of the vessel. Circumferential seams shall be located to clear openings, their reinforcing pads, and insulation rings, and saddle wear plates by a minimum of 2 i nches.

5. 3

5. 4

6.0

5.2.7

Welds are are to be groun ground d flush with the the plate on the inside inside of of the vesse vessels ls where where necess necessary ary for for the passage passage of baffles. Melting out of the reverse side of the weld shall not be permitted.

5.2.8

Seams Seams in suppo supporting rting skirts skirts for vertica verticall vessels vessels shall shall be doubledouble-butt butt welde welded. d. The connec connection tion betwe between en the skirt and the vessel shall be made with a smooth, flat-faced flat-fa ced weld on the O.D. of the skirt. A fillet weld shall also be applied on the I.D. of the skirt where the skirt attaches to the vessel. The skirt shall be attached to the base ri ng with two fillet welds; one on the O.D. and one on the I.D. of the skirt. Alternatively, a full penetration weld may be used to attach the skirt to the vessel, and/or the skirt to the base ring, provided the resultant weld-joint root has no crevices and can be adequately sandblasted and painted.

5.2.9

External External attach attachmen ments ts to the the vessel vessel shell shell or head head shall shall be contin continuous uous seal welded welded unles unlesss prohibite prohibited d by the ASME Code.

5.2.10

Welded vesse vessels ls shall shall be stress stress relieve relieved d when when required required by the ASME ASME Code. Flange Flange facing facing shall shall be protected against oxidation during heat treatment. No welding on vessels shall be done after stress relieving, unless specifically authorized by SDDSI.

5.2.11

The welding welding of pipe outside outside of the limits limits of the the ASME Code Code shall shall be as if if it were within within the ASME ASME Code limits of the vessel to which it is attached.

Structural Fa F abrication 5.3.1 5.3.1

Bolt holes holes in structu structural ral memb members ers shall shall be drilled drilled or or punche punched. d.

5.3.2

All welds welds in struct structural ural items items shall shall be full full penetrat penetration ion or fillet fillet welded welded such such that that the weld-jo weld-joint int root root has no crevices (completely seal-welded).

Coating 5.4.1

CONTRAC CONTRACTOR TOR shall shall blast blast all welds welds befor beforee painting painting or or shipmen shipmentt to expose expose underc undercutti utting ng and and remove remove welding slag.

5.4.2 5.4.2

All coatin coatings gs shal shalll be in accord accordanc ancee with with BONGABONGA-SPE SPEC-M C-ME-0 E-014 14 – Sched Schedule ule P.

INSPECTION AND TESTING 6.1

The resp respons onsibil ibility ity for for inspe inspecti ction on in complia complianc ncee with with the the ASME ASME Code Code rests rests with with the the CONTRA CONTRACTO CTOR. R. Howev However, er, SDDSI reserves the right to inspect, or to have SDDSI's authorized representative inspect, inspect, vessels at any time during their fabrication..

6.2

Vessel Vessel CONTRA CONTRACTOR CTOR shall shall furnish furnish SDDSI with a fabrica fabrication tion schedul schedulee in accordanc accordancee with with the requirem requirements ents of the Project Administration Instructions prior to start of shop work so that arrangements can be made for shop inspection.





6.3

Prior to to the the final final inspec inspection tion of vesse vessels, ls, all all slag, slag, loose scale, scale, dirt, grit, weld splatter, splatter, oil, test test mediu medium m and and other other foreign matter shall be r emoved from inside and outside of vessel and piping.

6.4

The appro approval val of of any any work work by by SDDSI SDDSI or or SDDSI' SDDSI'ss autho authorize rized d repres represent entativ atives es shal shalll in no no way way reliev relievee the CONTRACTOR of any responsibility for carrying out the provisions of these specifications.

6.5

All rein reinfor forcin cing g plates plates for for saddle saddless or nozz nozzles les atta attache ched d to the the outsid outsidee of the vess vessel el are to to be drilled drilled and and tappe tapped d for 1/4-inch NPT telltale hole, and a preliminary compressed air and soap suds test made in accordance with Paragraph UW-15 (c) of the ASME Code. Such telltale holes shall shall not be plugged in any manner.

6.6

X-ray ray an and Ult Ultra rassonic Ins Inspec pectio tion

6. 7

6.6.1

All vess vessel el and and piping piping welds welds shall shall receive receive a compl complete ete visua visuall inspecti inspection. on. Addition Additionally ally,, each vessel vessel and and piping weld including all welds connecting flanges to nozzles, nozzles and manways manways to vessel shell or heads, and all circumferential and longitudinal plate and head welds, shall be examined radiographically for their full length (100% radiography), or ultrasonically tested if welds cannot satisfactorily be X-rayed, unless otherwise otherwise specified on SDDSI's drawings or EDD. NDT shall be provided, and paid for, by the CONTRACTOR.

6.6.2

Radiograph Radiographss of welds welds in in pressure pressure vessels vessels and and piping piping within within the limits limits of the ASME Code Code shall shall be performed and interpreted in accordance with Paragraph UW-51 of the ASME Code and BONG ASPEC-011 – Schedule FF. .

6.6.3

Welds Welds in piping piping outsid outsidee the limits limits of the the ASME ASME Code, shall shall be inspec inspected ted radiog radiograph raphical ically ly in the the same same manner as those included within the limits of the Code.

6.6.4

Unless Unless otherwise otherwise specified specified by SDDSI, Type "T" (or equival equivalent) ent) film film shall shall be used used for all radiograph radiography. y. Other films will be considered for approval by SDDSI on vessel wall thicknesses greater than 2 inches.

Hydrostatic Te Testing 6.7.1

After After the vesse vessell is complete completed d and stress stress reliev relieved, ed, the the CONTRACTO CONTRACTOR R shall shall subject subject it to a hydro hydrostati staticc test, using water inhibited by an SDDSI-approved corrosion inhibitor. For Division 1 vessels, the the test shall conform to Paragraph UG-99 of the ASME Code, latest edition, including a hydrostatic test at 1.5 times the maximum allowable working pressure. For Division 2 vessels, the test shall conform to Article T-3 of the ASME Code, Division 2, latest edition.

6.7.2

The CONTRACTOR CONTRACTOR shall furnish furnish a pressu pressure re recorde recorderr for for the the hydrote hydrotest. st. The record (chart) of the the hydrotest shall be provided to SDDSI.

6.7.3

All hydros hydrostatic tatic tests tests shall be made made in the presen presence ce of an authori authorized zed Code Code Inspect Inspector or and with his approval. SDDSI reserves the right to be present for the hydrostatic testing. Vessels shall not not be previously tested by the CONTRACTOR.

6.7.4

Horizontal Horizontal vesse vessels ls shall shall be hydrostatic hydrostatically ally tested resting resting in saddles saddles and not not otherwis otherwisee supported. supported.

6.7.5 6.7.5

After After the the final final hydros hydrostat tatic ic test, test, the vess vessel el shall shall be drain drained ed compl complete etely. ly.



6.7.6

6.8

7.0


Hydrostatic Hydrostatic testing testing of piping piping outside outside the limits of the the ASME ASME Code Code shall shall be the same same as that that prescribed prescribed for the vessel to which it i s attached.

All inter internal nal weirs weirs and/or and/or buck buckets ets shall shall be water-le water-leak ak tested tested prior to hydrote hydrotestin sting g vesse vessell by filling filling weirs weirs/buc /buckets kets with water and holding level one hour.

IDENTIFICATION STAMPING 7.1

Plates, Plates, forgin forgings gs and pressu pressure re part partss shal shalll be identi identifie fied d as requir required ed by by the the ASME ASME Code Code..

7.2

Each Each comple complete te vesse vessell shall shall be provi provided ded with with an an SA-316 SA-316 stain stainles lesss steel steel namep nameplat latee seal-w seal-weld elded ed to a bracke brackett welded to the vessel shell and so located that it is easily accessible after installation (bracket shall be welded to the vessel prior to stress relieving, if required). The bracket shall be a "T" type with sufficient standoff to allow seal welding and the painting of the vessel vessel behind the bracket. bracket. This nameplate will contain at the minimum, the following data: -

8.0 8.0


ASME symbol symbol show showing ing vessel vessel is X-rayed X-rayed and, and, if appropriate, appropriate, stress stress relieved relieved,, and which which Divis Division ion of Code used. Manu Manufa factu cture rer' r'ss nam namee prec preced eded ed by "certi "certifi fied ed by" by" Man Manufact factu urer' rer'ss seria eriall nu number ber Nati Nation onal al Boar Board d regi regist stra rati tion on numb number er Maximum test pr pressure Date tested Thic Thick kness ness of heads eads and shel shelll Corrosion allowance Maxi Maximu mum m allow allowab able le wor worki king ng pres pressu sure re at desi design gn temp temper erat atur uree Pre Pressur ssuree-li lim mitin iting g ele elem ment(s nt(s)) Maxi Maxim mum allo allowa wabl blee wor worki king ng temp temper erat atur uree SDDS SDDSI' I'ss Vess Vessel el Tag Tag Num Number ber and and Name Name Inspector's stamp Weight (dry) Mini Minim mum De Desig sign Meta Metall Tem Tempera peratu ture re

DRA DRAWI WING NGS, S, FINA INAL REP REPOR ORTS TS AND DATA DATA SHEE SHEETS TS 8.1

Drawin Drawings gs - The CONTRAC CONTRACTOR TOR shal shalll furni furnish sh SDDS SDDSII all all of the require required d docum document entss to be be revie reviewe wed d in accordance with the requirements of the Proj ect Administration Instructions.

8.2

Final Final Reports Reports - The CONTRACTO CONTRACTOR R shall shall furni furnish sh the followin following g final final reports reports and data sheets, sheets, as a minim minimum, um, in accordance with the requirements of the Pr oject Administration Instructions: 8.2.1 8.2.1

CONTRA CONTRACTOR CTOR data data report, report, Form U-1 or or Form Form U-1A, U-1A, of the the ASME ASME Code. Code.

8.2.2

CONTRACTOR CONTRACTOR data report, Form U-2 or or Form U-2A of the the ASME ASME Code, Code, includi including ng certifie certified d material material record report if applicable.

8.2.3

Shop drawing drawing showin showing g "as-built" "as-built" dimensions dimensions for the location location of all all openings openings for pipe pipe connectio connections, ns, manway nozzles, nameplate(s) and internal connections.

8.2.4

Photosta Photostatic tic copies copies of recordin recording g charts, charts, showin showing g temperat temperature ure (rise, (rise, soak, soak, decline decline)) during therm thermal al stress stress





relief.

9.0

8.2.5 8.2.5

Reco Record rd (chart (chart)) of of hydr hydros osta tatic tic test test..

8.2. 8.2.6 6

Radi Radiog ogra raph phy y grad grader er shee sheets ts..

8.2.7 8.2.7

Mill Mill test test repo reports rts (al (alll press pressur uree-re reta tain inin ing g parts parts). ).

8.2.8 8.2.8

Any other other info informa rmation tion as require required d by by the the ASME ASME Code Code..

PREPARATION FOR SHIPMENT 9.1

All unpa unpaint inted ed fini finishe shed d surfa surfaces ces and threade threaded d openi opening ngss shall shall be be coate coated d with with a suita suitable ble rust rust preven preventive tive.. All flanged openings shall be protected by suitable metal, plastic, or wooden covers. Threaded openings, other than telltale holes in nozzle reinforcing pads and saddles, shall be protected with plastic or steel plugs.

9.2

Suitab Suitable le suppo supports rts shal shalll be provid provided ed for for intern internal al parts parts whic which h might might becom becomee damage damaged d during during ship shipme ment. nt. If remov removal al of these supports is required prior to putting vessel into service, the SDDSI representative will be notified in writing with a drawing showing supports to be removed.

9.3

Each Each platf platform orm and ladder ladder section section shall shall be identi identifie fied d with with a meta metall tag, tag, loosel loosely y wire wired d to each each section section.. The identification tag shall be metal die stamped, giving item number, platform number, piece number, plus total number for pieces under consideration, and shall include the vessel tag number to which each piece corresponds.

9.4

Any items items ship shipped ped loose loose sha shall ll be tagge tagged d and and crated crated.. The crate crate sha shall ll be tagged tagged with with vess vessel el tag tag numbe number. r. Shippi Shipping ng papers shall include a complete list of items contained in each crate.

9.5

The SDDS SDDSII repres represent entativ ativee shall shall be be notifi notified ed of of vesse vessell handl handling ing procedu procedures. res. These These proce procedur dures es sha shall ll also also be be listed listed on shipping papers. Notification is required for, but is not limited to the following: 9.5.1 9.5.1

Any Any lim limit itat ation ion on ang angle le of of lift lift for for pad padey eyes es..

9.5.2 9.5.2

Any Any restric restriction tionss for layin laying g a vertica verticall vessel vessel down down due due to intern internals als,, etc.

9.5. 9.5.3 3

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9.5.4 9.5.4

Procedu Procedures res for raising raising or lowe lowering ring a verti vertical cal vessel vessel..

9.5.5 9.5.5

Any Any other other precau precaution tionss necess necessary ary to hand handle le the vess vessel el withou withoutt damage. damage.

10.0 SUPPLEMENTAL SPECIFICATIONS FOR PRESSURE VESSELS IN SOUR SERVICE

10.1 All vessels shall be designed, constructed, inspected and tested in accordance with Sections 1 through 10 of this specification. In addition, the use of these supplemental specifications specificatio ns shall apply to vessels in sour service (0.05 psia H2S partial pressure or greater) and operating temperature above -20ºF and also to vessels designated on the Engineering Design Documents or drawings as a “Sour Service” vessel or as required to meet NACE MR-01-75.





10.2 Piping, such as sumps, cross drains, etc., outside the normal limits of the ASME Code, shall be fabricated as if it were within the AMSE Code limits of the vessel to which it is attached. The pipe wall thickness, however, shall be designed designed in accordance with the latest edition of ANSI/ASME B31.3. “Petroleum Refinery Piping Code for Pressure Piping,” using a minimum corrosion allowance of 0.100 inches.

10.3 Materials 10.3.1 Materials and construction for vessels shall conform to the ASME Code, NACE Standard MR-01-75 (latest edition), and with the fol lowing requirements, unless otherwise indicated on SDDSI's drawings 10.3.2 Materials for vessel shells, heads and other pressure parts shall comply with the following: 10.3.2.1 All plate shall comply with SA-516. Plate 1-inch and thicker shall be normalized prior to fabrication. 10.3.2.2 For vessels 24-inch O.D. and smaller, ASTM A-333, Grade 6 or ASTM SA-106, Grade B pipe may be used. Maximum yield strength of pipe based components components shall not exceed 50,000 psi. 10.3.2.3 All carbon and low alloy steel parts must have a hardness less than 235 on the Brinell Hardness Scale. This requirement applies to welds, heat affected zones, and base metals in plates, heads, and pressure piping. 10.3.2.4 All flanges, couplings, and other forging shall be normalized or annealed prior to fabrication. 10.3.3 Piping, including that used for nozzles, shall be SA-106, Grade B, maximum yield strength shall not exceed 50,000 psi. 10.3.4 Internals - Vanes in vane-type vane-type mist eliminators shall be in accordance with with SA-304 or SA-316. Material for all other parts of vane-type mist eliminators, and materials for internal distributors, baffles, clips, braces, and other non-pressure parts shall be in accordance with SA SA-516, -516, for plate and SA-106, Grade B for pipe. Stainless steel vanes in non-removable mist mist extractors for stress-relieved vessels shall be "L" grade. Bolting for internal for internal connections shall comply with NACE Standard MR-01-75, latest edition. 10.3.5 Gasketing 10.3.5.1 Gaskets for ANSI/ASME Class 900, ring-type joint flanges shall be 316 stainless steel Type R, identification mark “S316”, in accordance with ANSI/ASME B16.20 (latest edition). 10.3.5.2 Gaskets for ANSI/ASME Class1500, ring-type joint flanges shall be 316 stainless steel Type RX, identification mark “S316”, in accordance with ANSI/ASME B16.20 (latest edition). 10.3.5.3 Gaskets for ANSI/ASME Class 2500, ring-type joint flanges shall be 316 stainless steel Type RX, identification mark “S316”, in accordance with ANSI/ASME B16.20 (latest edition).





10.4 Design 10.4.1 ASME B31.3, "Petroleum Refinery Piping Code for Pr essure Piping," latest edition, shall be the authority for calculating the wall wall thickness of piping outside outside the limits of the ASME Code. The minimum corrosion allowance for such piping shall be 0.100 inches. 10.4.2 The minimum thickness for all internals, except for SA-304 and SA-316 materials, including plate, shapes, and pipe shall be 3/8" unless otherwise specified. 10.4.3 Internal supports support s shall be of the same material as the vessel shell and shall be seal welded. welded. Support rings shall be a minimum of ¾” thickness. thickness. 10.5 Fabrication 10.5.1 All vessels shall be stressed relieved after all welding welding on the vessel has be completed. No welding of any description (including the attachment of internal or external appurtenances) shall be permitted on vessels or piping subsequent to stress relieving. 10.5.2 CONTRACTOR shall establish welding procedures satisfactory to SDDSI to ensure that the weld hardness is properly controlled (see paragraph 11.3.2.3)

10.6 Identification Stamping In addition to the requirements of Sections 1 through 10, all pressure vessels fabricated in accordance with this Specification shall include the following statement stamped on the vessel nameplate to indicate design for sour (H2S) service: "IN COMPLIANCE WITH NACE NACE STD. MR-01-75, (XXXX EDITION)". NOTE: Insert the actual year of the Edition of NACE Standard MR-01-75 used in place of "XXXX" .


FPSO_Standard Specifications for Pressure Vessels.pdf

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