piping specification

~v CUiYOM CORPORATION

5PEC NO. 010/00/00/C5/T5/00/007SPECIFICATION PAGE NO. 1 OF 31

JOB NO. 21053

GENERAL WELDING REQUIREMENTS AT SITE

CLIENT: QATAR LIQUEFIED GAS COMPANY LIMITED

PROJECT TITLE: QATARGAS LNG PLANT PROJECT

LOCATION: RA5 LAFFAN, QATAR

CHIYODA JOB NO. : 21053

CHIYODA PROJECT: QGL PROJECT

RECEIVED1 6 MAY 1!~i

D&s ICONTROLLED DOCUMENTS I

1 ISSUE FOR CONSTRUCTION, INCL. COMPANY Ju ly 12 '94 ye~l: ~~COMMENTS (T- He - 22 rs) .A7'~~:

0 ISSUE FOR APPROVAL Apr i 1 22.' 94 ~~)~L' ~.;~ dZf)

NO. ORIGINATION (O)/REVISIONS DATE BY CHKD APVD

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T CHIYDOA CORPORATION

SPECIFICATION

1. SCOPE

2. REFERENCES2.1 Code2.2 Specification2.3 BP Standard

CONTENTS

SPEC NO. 010/00/00/CS/TS/00/007

PAGE NO. 2 OF 31

.3. WELDING PROCEDURE

3.1 General3.2 Welding Procedure for Piping3.3 Welding Procedure for Other than Pipin

~ 3.4 Welding of Carbon Steel and Low Temp ~c~a-rb-o-n-S~t~

Piping3.5 Welding of Austenitic Stainless Steel (SS 304L &321) Piping3.6 Welding of Hastelloy and Cupro-Nickel Piping

)

4. WELDER PERFORMANCE QUALIFICATION TEST4.1 Genera 14.2 Preparation for Test Coupon4.3 Execution of Test Welding4.4 Required Test and Acceptance Criteria4.5 Record of Test

5. WELDER CONTROL5.1 Registration5.2 Identification of Welder5.3 Execution of Welding5.4 Evaluation of Each Welder's Performance5.5 Training and Requalification Test for Unacceptable Welder

6. DOCUMENT CONTROL

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SPECIFICATIONSPEC NO. 010/00/00/CS/TS/00/007

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7. CONTROL OF WELDtNG CONSUMABLE MATERIALS7.1 Responsibility of Subcontractor7.2 Responsibility and Right of Chiyoda/Company7.3 Storage of Welding Consumables7.4 Drying and Issuing of Welding Consumable Materials7.5 Return of Welding Materials to Control Room

)

8. QUALITY CONTROL PROCEDURE8.1 General8.2 Required Quality Control Procedure

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1.

2.

2.1

SCOPE

This specification covers the requirements~0welding in field~

construction, such as welding procedures, welding procedurequalification tests and welder performance qualification tests~

piping, as well as quality control in field construction work forQATARGAS LNG PLANT PROJECT for QATAR LIQUEFIED GAS COMPANY LTD.QATARGAS) at RAS LAFFAN, STAGE OF QATAR.

This also specifies the minimum welding requirements for fieldstructural steel and field erected tanks including welder performancequalification test.

The requirements for LNG storage tanks are covered by012/07/71/23/PC/PR/010 IIEngineering Instruction Specification ll

prepared by LNG tank contractor, thus, those requirements areexcluded from this specification.

REFERENCE

The following codes, standards and specifications shall be applied tothe extent specified hereinafter:

(a) ASME Section IX (1992 Ed.+ 1992 Addenda)IIWelding and Brazing Qualification ll

(b) ASME B31.3-C (1992 Addenda)"Chemical Plant and Petroleum Refinery PipinUIl

(c) ANSI/AWS 01.1 (1992 Ed.)"Structural Welding Code ll

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(d) API STANDARD 650 (8th-Ed.)"Welded Steel Tanks for Oil Storage"

(e) API STANDARD 620 (8th Ed.)"Design and Construction of Large, Welded, Low-Pressure StorageTanks"

2.2 Specification

(a) 003/00/00/ME/TS/00/Oll"General Welding Requirements"

(b) 003/00/00/SP/TS/00/116"Fabrication of Pipework"

IIHOLD II

"Fabrication and Installation of Piping"

(d) OlO/OO/OO/MP/DB/OO/lOl"Piping Service Class"

(e) 003/00/00/CI/TS/00/019.') "Structural Steel - Materials and Fabrication"

(f) 003/00/00/ME/TS/00/00B"Field Erected Storage Tanks designed per API 650"

(g) 003/00/00/ME/TS/00/009"Field Erected Storage Tanks designed per API 620"

2.3 BP Standard

(a) BP Engineering Standard 167

"Fabrication of Pipework - Part 1, Carbon and Carbon Manganese

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? CHIYODA CORPDRAnOI

SPECIFICATION.

Steel Pipework ll

SPEC NO. 010/00/00/CS/TS/00/007

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3.

3.1

3.1.1

<0

3.1.2

3.1.4

3.1.5

(()

IIFabrication of Pipework - Part 2, Alloy Steel Pipework"

IIFabrication of Pipework - Part 3, Austenitic and Duplex SteelWork, Cupro-Nickel and Nickel base Alloy Pipework ll

WELDING PROCEDURE

General

Sub-contractors who will undertake field welding work for piping,structural steel, and tanks shall sUbmit~tailei)HeldingProcedureSpecifications (WPSs) to be used and supporting We'lding ProcedureQualification Test Records (PQRs) to CHIYODA/ COMPANY for approvalprior to commencement of any welding work.

PQRs obtained from other projects shall not be accepted, thus,qualifications or re-qualifications shall be carried out specificallyfor this project.

For piping welding, all the requirements of this specification and

"Genera 1 We 1ding Requ i rements" (003/00/00/ME!TS/OO/Oll) sha11~

For structural welding, ANSI/AWS 01.1 or ASME IX shall be applied,though the specification of "Structural Steel - Material andFabrication" (003/00/00/CI/TS/00/019) refers to BP Standard.

For field erected storage tank welding, 003/00/00/~1E/TS/00/011 shall

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SPECIFICATION

3.2 Welding Procedure for Piping

SPEC NO. 010/00/00/CS/TS/00/007

PAGE NO. 7 OF 31

(/) 3.2.1 @3shall be in accordance with Attachment-1 "Outline of Welding

Procedure for Piping". Detailed WPSs and their supporting PQRs forfield piping welding shall be prepared by the Sub-contractors inaccordance with Attachment-l and they shall be approved byCHIYODA/COMPANY prior to use.

3.2.2 In addition to the requirements of ASME IX, PQRs shall include the) following test results:

_.---'- -- ~_.- -..- --- - ----- -~-- - - -' ~.-'--.-----"- -

<0(a)

(b)

For carbon steel, Vickers hardness survey on a transverse macro <

section shall be made on the WELD/HAZ/BASE METAL with maximum \\criteria of 238 Hv 10. Production weld hardness on WELD shallbe 225 HB max. for non sour (non NACE) service. Production

\ weld hardness for sour (NACE) service shall be 200 HB as )

~tipulated in the para. ~~~:~~/OO/OO/ME/TS/OO/~~~ ~-/(All PQRs shall include hardness survey even if PWHT is notrequired.

Impact tested result for the WPS of low temperature carbonsteel (A333 Gr.6 or A671-CC60) at -46°C and for the WPS ofaustenitic stainless steel in cryogenic service at -196°C shallbe required in accordance with 003/00/00/ME/TS/00/011 and Table323.2.2 &para. 323.3 of ASME B31.3.

(c) For stainless steel welding consumables used for cryogenicservice, each heat, lot, or batch of filler material and fillermaterial/flux combination shall be "prequalification" tested(charpy impact tested) in accordance with para. 5 of003/00/00/ME/TS/OO/011.

(/)

(d) For low temperature carbon steel in sour (NACE) service (A333Gr.6 or A671-CC60 at -46°C), in addition to the requirement ofabove 3.2.2(a) and 3.2.2(b),~metal containing more than 1%

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If Sub-contractor wishes to use other welding procedures not listedin Attachment-I, he shall propose such welding procedures E~bY CHIYOOA/COMPANY.

(I)3.2.3

nickel shall not be permitted.---------- j

3.2.4 For butt welding of small diameter plplng (2 NPS &below), all GasTungsten Arc Welding (GTAW) process shall be applied.

) 3.2.5 For butt welding and fillet welding of pressure retaining parts,multi-pass welding (min. 2 passes) shall be required.

3.2.6 Brand name and company name of welding consumables to be used shallbe specified in the WPSs and PQRs.

3.2.7 Brand name and company name of welding consumables used for PQR's

<0 shall be({onsidere~as an essential variable for:)

. Low Temp.(£arbon Steel (LTCS)~

. Cryogenic Service Stainless Steel (S/S 304L)

3.3 Welding Procedures for Other than Piping

3.3.1 For tanks, Sub-contractor shall prepare detailed WPSs and supportingPQRs in accordance with ASME IX and other applicablecodes/specifications, and shall submit to CHIYOOA/COMPANY forapproval prior to use.

3.3.2 For steel structures, WPSs and PQRs in accordance v~ith ANSI/AWS 01.1or ASME IX shall be submitted to CHIYOOA/COMPANY for approval priorto commencement of welding work."prequalified Welding Procedures" as per ANSI/AWS Dl.l may beacceptable when all the requirements of' ANSI/AWS 01.1 are fullysatisfied, but limited to mild carbon steel of which the minimumspecified tensile strength is 65,000 psi. or less.

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3.4 Weldin of Carbon'---""""----,

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3.4.1

3.4.2

3.4.3

3.4.4

All pressure retaining welds and attachment welds to the pressureretaining parts of piping shall be made bY~GTAW or SMAW processesusing low hydrogen type electrodes except(~~,..t~root passes of buttwelds and branch connection welds.

Root passes of girth butt welds and branch connection welds wherecomplete penetration is required, shall be made by the GTAW process.Root pass~s by the SMAW process with AWS E6010~ctrod~may be~only for utility service and only when approved by CHIYODA/COMPANY.For all steam, gas, and process lines, the root~~of butt jointsshall be.~ith~GTAW process.

The WPSs for pip i ng in sour (NACE) serv ice sha11 be those that can0satisfy maximum hardness requirement of 238 HV~for pin point peakhardness on WELD/HAZ/BASE METAL and 200 HB for production welds (onWELD). Max. pin point Vickers hardness shall be confirmed by PQR.

For welding procedure qualification of Low Temp.~~~on s~piping(A333 Gr.6 or A671-CC60), charpy V-notch impact tests on WELD/HAZshall be@at -46°CG.~~r~~fug~nspecimen -.~ Test procedure and accePta~ criter~shall be in accordanCewith para. 323.3 of ASME B31.3.

3.4.5 For welding procedure qualification of Low T~mp. carbon steel piping(A333 Gr.6 or A671-CC60) exposed to sour (NACE) service, charpy Vnotch impact test on WELD/HAZ at -46°C and pin point peak hardness on

<7) . WELD/HAl/BASE METAL with max. 238 HV@Shall be@ @niCkel

content of weld metal shall be max. 1% for sour (NACE) service.

Hardness limitation on production welds (WELD) for sour (NACE)service shall be 200 HB.

3.4.6 In order to simplify and avoid misuse of welding consumables for

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3.4.7

3.4.8

3.4.9

carbon.steel plplng, Low Temp.~arbon s~PiPing, carbon steel sour(NACE) service piping, and caustic service carbon steel piping, Sub-

contractor shall consider~typeof weldin§~~~~~~~l~~meet all the requirements. \!hese consumables shall be approved by

,--.., -- ------------------,CH!YODA/COMPANY in advanc~

AllSwelding shall be uphill forSvertical Position,~~weldinfis~~

For carbon.stee 18 with t hickness of 25. 4mm (1 i' nch) & 0 ver ,~~O°C ~~ preheat sha11 be app 1ied. The preheat temperature sha11be maintained over a distance of 75mm (3 inch) on either side ofweld. Oxy-acetylene welding or cutting torches shall not be used forpreheat ing, ~ly specif ica11y des ig;ed heat i ng torches, gas rings or

~~C:l h~a~rs ~ll~be~ ~

PWHT shall be required forSwe1ds. 1) if the~rentiaI:~ut0weld thickness exceeds 19.05mm (3/4 inch) for carbon steel of generalservice (non-sour, non-NACE), 2) if the process is sour (NACE)service regardless of thickness, 3) if PWHT is required for all weldsfrom process reason (caustic service, etc).

When PWHT(£S~~for process reason (sour. caust i c , etc). all

the pressure retaining welds and~attachment welds pressureparts shall be post weld heat treated regardless of the thickness.

The PWHT condition shall be as follows:

Holding Temp. 625 ±20°CHolding Time 1 hour per 1 inch thickness (min. 1 hour)

. Heating &Cooling Rate above 400°C:Max. 200°C/hr for 1" &below thicknessMax. 200°C/hr*t(inch) for above I" thickness

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o 8 ~welding @GALVANIZEO carbon steel PiPeJ0~tee:Dweldingconsumables shall be used.

(/) Cf£D) @welding@ALUMINIZED carbon steel pipe, AWS ER309MO/E309MOwelding consumables shall be used.

3.5 Welding of Austenitic Stainless Steel (S/S 304L &321) Piping

3.5.1 Root and second passes of girth butt welds and branch connection

)0 welds of p.iping{1shall be made by the GTAW process. For thesubsequent passes of groove welds or fillet welds shall be made by

SMAW or GTAW.For small diameter piping (2 NPS & below),@GTA"W processeDshall be applied.Multi-pass welding (at least min. 2 passes) shall be required.

3.5.2 Internal gas purging with pure Argon gas shall be required for

<2> ~~~ra~connection welding by GTAW.

3.5.3 For the selection of welding materials for SIS 304L in cryogenicservice, special care shall be taken in accordance with para. 3.2.2

(b) & (c) above.

The ferrite content of SMAW consumable for cryogenic service shouldbe 3-5% by SCHAEFFLER diagram.However, for GTAW consumable, the ferrite content may be relaxed to

3-10% taking into account the nature Of@VGTAW process withgenerally higher impact values than those of SMAW.

Prequalification of welding consumable per each heat, lot, or batchand filler material/flux combination at -196°C sha'll be followed in

accordance with para. 5 of 003/00/00/ME/TS/00/Oll.

<;)3.5.4 AllSweldi~~ shall be uphill for vertical Position,~

'~ing is not ~ermitte0

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o 3.5.5 PWHT is not required for~t:~ic~eld0

3.5.6 Max. interpass temperature shall be 177°C (350°F) for austeniticstainless steel welding. The interpass temperature shall be checked

by temperature indication crayon or equivalent.

o)

3.5.7 Welding between austenitic stainless steel and galvanized carbon

steel or zinc rich primer coated carbon steel shall be prohib;ted~

~s to avoid liquid metal embrittlement (LME).

. .3.5.8 Niobium stabilized austenitic nickel steel weld metal (5/5 347) shall

not be~~for SS30~yogenic pipe _weldin~

3.5.9 (Grinding machine~with grinding wheels, wire brushes, files, etc.,~

for austenitic stainless steels shall be completely separated from

those for ferritic steels and shall be clearly marked by attaching

colour tape or other suitable means.

3.6 Welding of Hastelloy and Cupro-Nickel Piping

.0')

3.6.1

3.6.2

All passes including root pass~ of girth buttG) branch connection and

fillet welds of piping shall be made by@VGTAW process only, since

maximum pipe size of Hastelloy and Cupro-Nickel is approximate~NPS

and ®NPS respect ive ly.

Mu 1t i -pass we 1di nq (at least mi n. 2 passes 'Grequ ired.

Internal gas purging with pure Argon gaS®required for butt &branch connection welding by GTAW.

<0 3.6.3 Internal and external~f~C~Of pipes to be welded shall be clean

for a distance at least 25mm from the fusion face.

<0 3.6.4 (G~~hi~ithgrinding wheels, wire brushes, and files for

Hastelloy and Cu-Ni material shall be completely separated from those

for ferritic steels and shall be clearly marked by attaching colour

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tape or other suitable means. To avoid contamination of stainless )steel, and other high nickel alloys, tools for CU/Ni shall be marked,segregated and kept only for Cu/Ni.

-------------------"---------...._-------_._----------WELDERS PERFORMANCE QUALIFICATION TEST

General

) 4.1.1 All welders and welding operators engaged in field welding work(hereinafter called welder) shall be newly qualified in accordancewith applicable codes and the requirements herein under the witnessof CHIYODA/COMPANY's representatives before the commencement of anywelding work. Welder qualification record for previous jobs is not

~ effective for thiS~

4.1.2 ~Sub-contractor shall be wholly responsible for qualifying his own

<0 welders&prOje~

4.1.3 Standard test procedure and qualification range for piping welder andstructural welder are listed in Attachment-2 .

._) Classification of welders are as follows:

(a) Piping Welder:

Welder who can make the pressure retaining butt welds, branchconnection welds, socket welds and attachment welds to thepressure retaining parts of piping and equipment within thequalified range of ASME IX and Attachment-2.Classification of piping welders are following four types:

oCarbon Steel Piping Welder: (for P-No.1 mati 1)

(incl. low Temp.~

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</)

(b)

Stainless Steel Piping Welder: (for P-No.8 matll)

(for SIS 304L &321)

Hastelloy Steel Piping Welder: (for P-No.44)

Cupro-Nickel Piping Welder: (for P-No.34)

Qualification Test for each type of welder shall be performed

respec~ively. These qualifications are not(i~terchangeable:)

eve~~o~the F-No. of ASME IX is same.~

Structural Welder:

Welder who can make structural steel welding of mild carbonsteel. Classification of structural welder are as follows:

. Structural Welder for Groove Welding

. Structural Welder for Fillet Welding only

Structural welder qualified for groove welding shall berequired for all load bearing structural members such as piperack, duct, steel stack, pipe support, etc.

Structural welder qualified for fillet welding only isacceptable for non load ·carrying member or minor load carryingmember, such as instrument/electrical support, ladder,

handra i 1, etc.

4.1.4 For field erected storage tank welding, welders and welding operatorsshall be qualified in accordance with ASME IX.

<0 4.l.S00nly qualified welders canE~3tack welds.

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"'. CHIYDDA CORPORATION

SPECIFICATION

4.2 Preparation for Test Coupon

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PAGE NO. 15 OF 31

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Test coupons for piping welder shall be prepared in accordance withthe applicable welding procedure specification, pipe diameter andthickness listed in Attachment-2.

For structural welder for groove welding, standard test coupon asshown in Fig. 5.19A or 5.19B of ANSI/AWS 01.1 should be prepared.However, the material thickness of test coupon may be 9-25 mm dependon production weld thickness, in lieu of backing plate, back chippingand back welding method may be used.

For structural welder for fillet weld only, test coupon shall be150 mm length by 100 mm width carbon steel and 6-12 mm thickness.

For tank welder performance qualification test, Sub-contractor shallpropose to CHIYODA/COMPANY their test procedures for approval.

4.3 Execution of Test Weldinq

Test welding shall be carried out at the witness of CHIYOOA/COMPANY'srepresentative. Each welder shall be clearly marked on his back withthe assigned test Nos. or name for identification.No grinding shall be allowed;;;Vthe compietedl~~

4.4 Required Test and Acceptance Criteria

4.4.1 Piping Welder:

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r:. -----------weld~~~~~~IIVisuallylland "Rad ioqr aph i ca l ly". Test '\~ ~tions shall be 2G + SG for GTAW and SMAW process. ~-----.__._-_.-----

(a) Visual Inspection:

During and after welding, each welder's~~;nce and---/--------~

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(b)

G:it it~~ sha11 be checked. Externa 1 we 1d re i nforcement andi nterna 1 protru s ion sha11 be fu sed wi th and .sha11 be mergedsmoothly into the component surface. Cracks., incompletepenetration, surface porosity, exposed slag inclusion andundercutting (over 0.4 mm depth) shall not be permitted.

Radiographic Examination:

Acceptance criteria shall be in accordance "'ith the Table

341~3.2A~evere Cyclic c~nditio~Of ASME 831.3.

o

4.4.2

4.4.3

4.5

Structural Welder:

Structural welder for groove weld shall be judged by "Visual ll andIIRadiographic ll examination. Acceptance criteria for radiographicexamination shall be in accordance with the QW-191.2.2 of ASME IX.

For fillet welder, the weld shall be examined by IIVisual ll, IIFracture

Test ll, and IIMacro Examination ll with the acceptance criteria of QW-182

&QW-184 of ASME IX. However, the fracture test and macroexamination may be omitted, if visual test shows satisfactory withthe consensus of CHIYODA/COMPANY·s representative.

Tank Welder:

In addition to visual inspection, radiographic examination shall becarried out in accordance with QW-191.2. of ASME IX and the

acceptance criteria shall be to QW-191.2.2 of ASME IX.The method of radiographic examination on first production weld shallnot be allowed for the welder performance tests fOl~ this project,

even if QW-304.1 of ASME IX gives its permission.

Record of Test

After@welder's performance qualification test, Sub-contractor shall

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provide ~Manufacturer's Record of Welder or Welding Operator

Qualification Test" (Attachment-3) with the photograph of eachwelder, and submit to CHIYODA/COMPANY for approval prior tocommencement of any field production welding work.

5. WELDER CONTROL

5.1 Registration

After review of "Manufacturer's Record of Welder or Welding OperatorQualification Test" (Attachment-3) at field site, his name, hisclasses of qualification and his photograph shall be registered withstamp number in each welder's personal record (Attachment-4). Thehistory of qualification such as changes of class at field siteshall also be recorded in the welder's personal record.

5.2 Identification of Welder

Welder's Identification Label;

Each welder shall affix the colored and marked "WELDER'sIDENTIFICATION LABEL" (Attachment-5) showing his classes ofqualification onto the right side of welder's goggles mask.Discrimination of "WELDER'S IDENTIFICATION LABEL" is indicated inTab le-l.

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Table-1 Discrimination of "WELDER IDENTIFICATION LABEL"

Color of Type of QualificationLabel

Material Welding Process,Application

F-No. &Position

White Carbon Steel Marked on each Piping Welder &label Structure Welder

(groove weld)

Pink Carbon Steel do Structure Welder(fillet weld)

Blue . Stainless Steel do Piping Welder

Yellow Hastelloy C-276 do Piping Welder

Red (90/10) Cu-N i do Piping Welder"-----"

5.3 Execution of Welding

<0Each qualified pipe welder shall perform actual~od~tio~welding inaccordance with the qualified welding procedures.For identification~welds, each welder shall mark his stamp numberadjacent to the weld immediately after completion of the welding."Daily Welding Report" (Attachment-6) and IIIsometric Drawing or SpoolDrawing ll (attachment-7) shall be submitted to CHIYODA/COMPANY everyday for the purpose of weld quality control check.Attachment-6 &-7 are only samples. Sub-contractor may modify thesedocuments for his convenience, but subject to approval fromCHIYODA/COMPANY.

5.4 Evaluation of Each Welder's Performance

5.4.1 Evaluation Method

Each Welder's performance shall be evaluated by the result ofradiographic examination.Overall work flow for control of welders shall be referred in

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SPECIFICATION

attached CHART-I.

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Acceptance criteria of radiographic examination shall be inaccordance with para. 341.3.2 and Table 341.3.2A of ASME 831.3.

CHIYODA/COMPANY's welding engineer has the right to reject weldersafter consideration of the result of radiographic examination, causeof defect and circumstance stipulated hereinafter.

") 5.4.2 Extent of ~adiographic Examination and Recording

For initial evaluation, first 3 production welds (9irth butt welds)

~ of each newly qualified welder shall be~ograp~~examined,regardless of material service class. After that, extent ofradiographic examination shall be in accordance with the requirementof relevant specifications and piping service class.

For welder's performance evaluation, in principle, the welds to beexamined shall be selected to ensure that not less than 5% of eachwelder's actual production welds (girth butt welds) are included.

(/) And also, for random radiographic examination, ~repairs are fOU~progressive examination shall be carried out in accordance with para.

341.3.4 of ASME 831.3.

This progressive examination should be limited to the welds madewithin every two weeks.

For recording of radiographic examination results, "RadiographicExamination Report ll (Attachment-8 and 9), "Welder's Control Sheet byRadiographic Examination (every 2 weeks)1I (Attachment-IO), and"Radiographic Examination Report (Monthly)" (Attachment-II) shall beprepared by Sub-contractor.

I:;- .. -:';'9---"';$',7" .,"."."-; ..._.r';

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'Y·CHlYDDA CDRPDRAnON


PAGE NO. 20 OF 31

5.4.3 Initial Evaluation

First 3 (three) actual production welds of each newly qualifiedwelder shall be radiographic examined regardless of material serviceclass and evaluated according to the procedure indicated in attachedCHART-2, that;

-_.-------------------~------_.---..' ......The results of the first 3 production welds are to be submittedto CHIYODA for review. All 3 production welds are acceptable,the welder shall be allowed to continue with production

welding.

\

)

!--"""------- -------------------_._-~

(1)

o

(2) If one of 3 production welds is rejected, additional 2 jointsmade by the same welder shall be radiographic examined. If allof the second group are acceptable, the welder shall beacceptable. If any of the second group reveal defectsrequiring repair, the welder shall be unacceptable and

disqualified.

(3) If 2 (two) or all of 3 (three) production welds are rejected,the welder shall be unacceptable and disqualified.

5.4.4 Periodical Evaluation

A welder who passed the initial evaluation mentioned in para. 5.4.3can continue production welding. Extent of radiographic examinationfor evaluation of welder's performance shall be in accordance with

para. 5.4.2.

Periodical evaluation shall consist of two types of evaluation asshown in attached CHART-3.

5.4.4.1 Evaluation by Result of Radiographic Examination

One of the periodical evaluation method of welder's performance shall

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~ CHIYDDA CDRPDRlTIDN


PAGE NO. 21 OF 31

(() be based on the acceptance ratio of~iap~c~ll~examinationevery 2 weeks. Acceptance ratio shall be defined as the ratio ofnumbers of film accepted by total numbers of film taken in a certainperiod.

(1) Individual acceptance ratio in 2 weeks is 90% and above, thewelder shall be acceptable.

(2) Individual acceptance ratio in 2 weeks is less than 90% but 80%and above, a warning shall be given to the welder.

o

(3) Individual acceptance ratio in 2 weeks is less than 80%, thewe 1der sha 11 be unacceptab 1e bas; cally, (@ consid~rat; on@the total numbers of film taken in 2 weeks, cause of defects,etc .... shall be made by CHIYODAls welding engineer beforedisqualifying the welder.

5.4.4.2 Evaluation by Progressive Examination

--...-----....- ---_.~--_._--~--.,.,-_..----._--_._-_.._._- -. --_.-.._.." ....

~ond method of ~oduction evaluation relates to theJrandomradiographic examination and progressive examination described inpara. 341.3.4 of ASME 831.3 and modified hereunder, that is;

(1) When the random radiographic examination reveals a defectrequiring repair, two additional joints made by the same weldershall be radiographic examined.

(2) If the second group examined is acceptable, all itemsrepresented by these additional examinations shall be acceptedand the welder shall be acceptable.

<0 (3) For each of the second group of items which reveals~requiring repair, two additional joints shall beradiographically examined.

.... ,-'__.•.~ __ -:_,'~4".~",<_,_.r. __.. ~-., ~ -, "?". - ..• _'.~~------'_

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T CHIYDDA CDRPDRATION


PAGE NO. 22 OF 31

(4) If all of the third group of items examined are acceptable, theitems requiring repair shall be repaired and all itemsrepresented by the examined items shall be accepted. And thewelder shall be acceptable.

(5) If any of the third group of items examined reveal defectsrequiring repair, all production welds made by the same welderin 2 weeks shall be 100% radio raphically examined andrepaired. ~welder shall be deemed unacceptable anddisqualified.

5.5 Training and Regualification Test for Unacceptable Welder

I

./

I~---------._-------------------'

--~--------------------_._----_._- ~~ .._-..-----. '-'- -'jIf a welderl~ evalu~tion indicates unacceptable performance, he shallcease production welding. The welder shall be given further trainingto improve his performance by Sub-contractor. He may be downgradedfrom butt welding to fillet welding at the option of Sub-contractor.

({)

~requalification test shall be carried out for a welder who..,J

completed acprogr~mme o!jtraining established by Sub-contractor andsubmitted to CHIYODA/COMPANY's welding engineer for approval. ~~elder who passed the requalification test, shall becarefully checked and evaluated according to this welder controlprocedure.

6. DOCUMENT CONTROL

0.

The documents mentioned in this specification shall be prepared andkept in accordance with the~thod~ shown in Table 2.

~

CHIYODA/COMPANY's welding engineer and inspector shall have the rightto check the document control and filing system of Sub-contractor atany time as necessary.

? CHIYODA CORPORATION

SPECIFICATION

Table 2

SPEC NO. 010/00/00/CS/TS/00/007

PAGE NO. 23 OF 31

Preparation and .Custody of Document

7.

CUSTODYKIND OF DOCUMENT PREPARATION

SUB- CHIYODA'SCONTRACTOR QC GROUP

1. MANUFACTURER'S RECORD OF WELDER OR SUB-CONTRACTOR ORIGINAL COpyWELDING OPERATOR QUALIFICATION TESTS(Attachment-3)

2. WELDER'S PERSONAL RECORD SUB-CONTRACTOR ORIGINAL COpy(Attachment-4)

3. DAILY WELDING REPORT SUB-CONTRACTOR ORIGINAL COpy(Attachment-6)

4. ISOMETRIC DWG·OR SPOOL DWG SUB-CONTRACTOR ORIGINAL COpy

(Attachment-7)

5. RADIOGRAPHIC EXAMINATION REPORT SUB-CONTRACTOR ORIGINAL COpy

(Attachment-8)

6. RADIOGRAPHIC EXAMINATION REPORT SUB-CONTRACTOR ORIGINAL COpy

(EVERY 2 WEEKS)(Attachment-9)

7. WELDER CONTROL SHEET BY SUB-CONTRACTOR ORIGINAL COpyRADIOGRAPHIC EXAMINATION(EVERY 2 WEEKS)(Attachment.10)

8. RADIOGRAPHIC EXAMINATION REPORT SUB-CONTRACTOR ORIGINAL COpy(MONTHLY)(Attachment-11 )

CONTROL OF WELDING CONSUMABLE MATERIALS

7.1 Responsibility of Sub-contractor

(/) ( 1) Sub-contractor shall~whOllY responsible for the control ofwelding materials to be used.

(2) Sub-contractor shall submit the "Control Procedure of WeldingMaterials" to CHIYODA and obtain CHIYODA's approval before

starting~~weldingwork ..

(3) "cont~~ced.~~_~.!. __~~.~~.~~~.lC~' ...!.:-.to be es tab 1i shedto~event use of inconnect welding consuma?_~ and to provide

~--........ -...._-_._--~.

'T CHIYDOA COHPORlnO.


PAGE NO. 24 OF 31

welders with welding consumables in good condition in order tomake sound welds.

)

<0 (4)

~~---------------------...I

/(--------- --------~---------------,j

"Contro1 Procedure of We 1ding ~um~b 1§I sha 11 conta i n theorganization, flow chart of control, name of welding~nsumabl~

controllers, layout drawing of welding (Consumable') control room,---..-/

storage, drying, re-drying, holding, delivery and return

procedure~welding consumables type and number of drying

oven,(~)ovens and portable dryers according to thisspecification. (Attachment-12, -13, -14 &-15)

(1)

o

o

o

o

(5) Sub-contractor shall assign sufficient numbers of welding

(~nsumab<§ contro llers in charge.

(6) Sub-contractor shall establish the weldingCconsumab~~control

room. (Attachment-I3)

(7) Sub-contractor shall prepare the drying ovens and~~ovens. (Attachment-13)

(8) Sub-contractor shall provide each welder with the portable------~

~ated dryer. (quiv~

(9) Sub-contractor shall maintain and control the flow of welding

(~~as shown on "Flow Chart for a Typical ConsumableControl Procedure". (Attachment-12)

(10) Sub-contractor shall issue and fulfil IIwelding~~'Request Card" as shown on Attachment-14.

(11) ~ecauti~shall be taken care for:~

(a) Storing

welding(~s~mabl~shall be stored indoors free from

-- .,/

'" CHlYODA CORPORATIOI


PAGE NO. 25 OF 31

(b)

moisture. The package of welding~shall not beopened until just before use.~packages of welding(c-o-~-s-~-m-ab-l-e-~hall not be stored

directly on the ground.

Drying

o

Prior to issuing LOW HYDROGEN TYPE ELECTRODES for carbonsteels and LIME-TITANIA TYPE ELECTRODES for austeniticstainless steels, they shall be dried to reduce the

'~~wh;ch is contained in the flux coating inaccordance with Attachment-15 "DRYING CONDITION OFELECTRODES II

•

Instructions from welding consumable suppliers shall befollowed.

(e) ~d5)

After drYing,~types~electrodesmentioned aboveshall be kept at a temperature range of 100-150°C to

preven~~ture re-a~orptio~ Refer to Attachment-15.

HIGH CELLULOSE TYPE ELECTRODE shall also be stored in~

~at a temperature range of 70-100°C.

o

(d)

(e)

Re-drying

Re-drying of~typeS of electrodes mentioned in para.7.1(11)(b) shall(not be more thar0once.~

Quantity control of welding materials

Only the welding materials required for one day use shallbe issued and any remaining materials unused shall be

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'T CHIYODA CllHPDHAnD~

SPECIFICATIONSPEC NO. 010/00/00/CS/TS/OO/007

PAGE NO. 26 OF 31

7.2

return~ and stored at the ~~~~~_~_E~~a~ control

room.[~mu~b~J:id to~~misu~different kinds of welding~ No welaing

(consumabies\ shall be left on the work site after the daily~

work is finished.

Responsibility and Right of CHIYODA/COMPANY

(1) Prior to commencement of the sub-contractorijs welding work,CHIYODA/COMPANY's welding engineer or supervisor shall check

the" sub-contractor's weldingtf~~umabl!0control room and itsfacilities, as well as, review of IIControl Procedure of Welding

~a~lejll issued by the sub-contractor.

(2) CHIYODA/COMPANY's welding engineer or welding supervisor shallhave the rights to monitor and check the actual welding

~control and organization at any time and t~e,instruct and require the improvement of all welding~~control activities and organization of the Sub-contractor.

7.3 Storage of Welding Consumables

(/)

( 1) Warehouse

Welding electrodes and rods shall be stored in~n a~~of Subcontractor's warehouse approved by CHIYODA/COMPANY.Welding electrodes and rods shall be stored orderly andseparately with labels or markings so that they can beidentified easily to avoid mixing.Welding electrodes and rods may be stored in the welding

Cc~mab1~controL"!~~.~:__~: \i~~t.00--=.~~~.~ge .~?nd i t ~ ons can~a~hiYOda shall approve this arrangement before - )

~a~tion is taken~ ~--------~~--------

~v~ CHIYDDA CDRPDRAnOI

SPECIFICATION

(2) Storage Conditions

SPEC NO. 010/00/00/CS/TS/00/007

PAGE NO. 27 OF 31

o 7.4

Same conditions as mentioned in para. 7.1(11)(a) shall beconsidered.

Drying and Issuing of Welding Consumables~

(1) Request of Welding~SUmableiO

(a) When request i ng we 1ding~mab~ the superv i sor orwelding foreman shall fill the "welding~Request

Card" showing the required type and quantity of welding

~~mab\~to be us"ed for next day's welding work of eachwelder, and submit it to the welding~nsumable)

controller.Refer to Attachment-14.

Attachment-14 is typical form of "welding~s~~Request Card", then it may be modified for Subcontractor's convenience.

(b) In case of requesting the welding~nsu~}j~s:>other thanmild carbon steel (ex. Low Temp.~ STAINLESS STEEL,HIGH Ni ALLOY, Cu-Ni), the supervisor or welding foremanshall ask their welding engineer or CHIYODA weldingengineer and shall confirm the correct type of welding

~!ble~

(c) Welders shall not request the weldingC£9~i~~~bl~0directlyfrom the welding~s~mabJiWcontroller.

(2) Upon receipt of the "welding~ Request Card", thewelding material controller shall prepare for issuing on thenext day as follows:

• - _...._ ••_ .0 __ ..~~

'Y CHIYODA CORPORAnO.

SPECIFICATION- SPEC NO. 010/00/00/CS/TS/00/007

PAGE NO. 28 OF 31

(I)

(1)

(/)

(3)

(a) Check the total quantity and type of the welding

(Consumabl~ requested.-------(b) Check the stock quantity and type dried and re-dried on

the day.

(c) In the case of lack of ;;perly .~:;;;-;-~~~e_l~in~)consumables, new consumables shall be dried for issuing on

the next day.

(d)· Also, the Sub-contractor's welding~onsumable controller--shall report their consumed welding ~s~mabl~quantity toCHIYODA welding engineer or welding supervisor every week

for CHIYODA's checking.

Delivery from Welding~Control Room;

(a) A portable(:lectrode dryer qu~shall be provided toeach welder, storage of his welding electrodes.

(b) On delivery, only supervisors or welding foremen shall

receive the welding~~s~~abl~in order to avoid anyconfusion in the welding~ns~~~control room.

(c) Supervisors or welding foremen shall come to the welding

~control room to receive the portable dryers foreach welder under his supervision.

(d) Maximum delivery amount of electrodes for one time isnormally limited 5 kg per each portable dryer.

--------_/<0(e)

~ • .",__ ' •..-__ • J'

Electrodes which have been re-dried shall be used withinthe manufacturers time limit.

' ....\I,

(f) Prior to delivery, the welding~~~controller shall

? CHIYODA CORPORATION


PAGE NO. 29 OF 31

<1))

«)

7.5

check the following points:

Confirm the contents of the "Welding~--;~Request Card ll

•

Check the quantity and brand name against the requestcard.

Return of We 1di ngceonsumab l~?) Contro1 Room< >'

(1) Supervisors or welding foremen shall gather the portable dryers

of their welders and return toSthe designated place eGO: the:Jwelding~n~~abl~control room after finishing work at the endof each day.

No we 1ding ~~suma§ sha11 be 1eft on the work site.

(2) Prior to returning the portable dryer, supervisors or welding

foremen shall dispose~ny~~amWhen electrodes unused on that day remain in the portabledryer, the welding consumable controller shall take out theremai~e1ectrodes from the portable dryer and Gtor~

~

separately for re-drying.

8. QUALITY CONTROL PROCEDURE

8.1 Genera 1

Sub-contractor is wholly responsible for the quality of welding, heshall establish the quality control system and shall prepare thequality control procedure and its supporting procedure or instructiondocuments which shall also be subject to approval by CHIYODA/ COMPANYbefore commencement of work.

T' CUIYODA CDRPDRATIOW


PAGE NO. 30 OF 31

CHIYODA/COMPANY shall have the right to monitor and check all theSub-contractor's quality control activities, documentation andorganization at any time throughout the construction stage and toadvise, instruct and require the improvement of the quality controlsystem of the Sub-Contractor.

8.2 Required Quality Control Procedure

(/)

In addition to the quality control requirements specified in para. 4,

5, 6 &7 of this specification, Sub-contractor's quality control- - ----procedure shall assure ~hat: L-- ._.~_.J

oo

(a) The correct material (incl. pipe dia., schedule) is welded inaccordance with the established WPS by qualified piping welders

~ with properly controlled and correct welding~~~m~les~

~~ <.~~ d~'t.d . ==)~ ~required Non-destructive Examination (100% Visual, RT,

PT/MT, etc.) and PWHT are properly performed at correct timingin accordance with the approved NDT/PWHT procedure by thequalified personnel without oversight.

(0 @ @"work/control flow for PWHT" and "Work/Control flow for RT"

are shown in Attachment-16 &17, respectively.

""-_ •••• - ........ _ .--__a••• ~. -- ... ..-.-.-•••••• ---- ••••• - _.

-- ---/'----- .' .. -- -. .... ... . .-_ .. - .- , ..._-~._._~..-",-----

The instruction of Attachment-18 for Selection of Welds for RTis followed.

(I) ® @~~jOin!~~ering system on each ISO Dwg. or spool Dwg.

enables traceability\to welder records and inspection resultsincluding visual inspection, NOT and PWHT.

(I) 0jl ~~r~·]~s_~uc[edho~to-i~~a·te~repairweids

when unacceptable weld defects are found by NOT.

(I) @ ~3fabrication sequence including the timing of all the

T CHIYDDA CORPORlnD~

SPECIFICATIONSPEC NO. 010/00/00/C5/T5/00/007

PAGE NO. 31 OF 31

weld inspection/PWHT and its control document is fully

implemented.

(> ~ ~heck t~all welding and the required inspection/PWHT havebeen satisfactorily completed before pressure test.

-------------------------..-..<;) steels are protected from zinc contamination by

the fabrication yard and tools.

--------

BASE METALWELDING

FILLER METAL PWHT (3)PROCESS (2) ARGON

ARGONpnE

WELDING WELD GASGAS

HEAT

TECH. TYPE THICK ASME RODFLOW

BACKTEMP.

TEMP.MIN. REMARKS

NO. (1) MATERIAL p.RANGE

PASSPROCESS SPEC

AWS F·DIA.

RATESHIELD

MIN.RANGE

HOLD

SPEC NO.(mm)

NO.NO.

CLASS NO.(mm)

(limin) (DC)("C)

TIME(HRS)

TM·1 B.W. CS (A106-B 1 s 19.05 1 GTAW SFA 5.18 (4) 6 2.0 6 ,.., 15 General (Non-sour,

API5L·B or ER70S-X 2.4 Non·NAGE)

eq.) service.2- SMAW SFA 5.1 E7016 or 4 2.6 - · · . . 19.05 mmT is

E7018 3.2 included.4.0

100)---TM·1SR B.W. do 1 19.05 - do do do do do do do · · 625:t20 1 General (Non.sour,

25.4 Non-NACE)service.

TM·1HSR B.W. do 1 25.4 - do do do do do do do · 100 625:t20 1 Hr/in. General (Non-sour,Non·NAGE)service.25.4 mmT isincluded.

TM·lSR B.W. do 1 <25,4 1 GTAW SFA 5.18 (4)(5) 6 2.0 6 ,.., 15 Sour (NAGE)

(NAGE) ER70S-X 2.4 services & whenPWHT is req'd

2- SMAW SFA 5.1 E7016 or 4 2.6 . - · 625:t20 1 from process

E7018 (5) 3.2 reason.4.0

TM·1HSR B.W. do 1 25.4 - do do do do do do do · 100 625 :t20 1 Hr/in Sour (NACE)

(NACE) service & whenPWHT is req'dfrom processreason.25.4 mm Tisincluded.

T·l B.W. do 1 s8.8 All GTAW SFA 5.18 (4) 6 2.0 6 - 15 · - . . For 2 NPS &ER70S-X 2.4 smaller, all GTAW

shall be used.

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BASE METALWELDING


ARGONPRE

WELDING WELD GASGAS

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TEMP.MIN. REMARKS

NO. (1) MATERIAL P-RANGE

PASSPROCESS SPEC

AWS' F· DIA.RATE

SHIELDMIN.

RANGEHOLD

SPEC NO.(mm)

NO.NO.

CLASS NO.(mm)

(Ilmin) (0C) (0C) TIME(HRS)

T-1SR B.W. CS (A106-B 1 s8.8 All GTAW SFA 5.18 (4)(5) 6 2.0 6 - 15 . . 625:t20 1 For 2 NPS &(NACE) API5L-B or ER70S-X 2.4 smaller, all GTAW

eq.) shall be used.

Sour (NACE)service &whenPWHT is requiredfrom processreason.

M-l B.W. do 1 s 19.05 1 SMAW SFA 5.1 E60l0 3 2.6 For 3 NPS &3.2 larger, only when

approved by2 .... SMAW SFA 5.1 E7016 or 4 2.6 - - . - Chiyoda/

E7018 3.2 COMPANY.4.0 (utility service only)

TML-l B.W. AI-killed 1 S 19.05 1 GTAW SFA 5.18 (5) 6 2.0 6 - 15 Low temp. service

CS ER705·X 2.4 &general (Non-

(A333-6 or sour, Non-NACE)

eq.) 2- SMAW SFA 5.1 (5) 4 2.6 . - - . . service.

or E7016-X 3.2 19.05 mmT is

(5) 4.0 included.

SFA 5.5

TML-1SR B.W. do , 19.05 .... do do do do do do do - . 625:t20 1 Low temp. service

25.4 &general (Non-sour, Non-NACE)service

TML-1HSR B.W. do 1 25.4 - do do do do do do do . 100 625:t20 1 Hr/in Low temp. service&general (Non-sour, Non-NACE)service.25.4 mmT isincluded.

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Attachment-1 OUTLINE OF WELDING PROCEDURE FOR PIPING

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WELDING WELD GASGAS

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TEMP.MIN. REMARKS


PASSPROCESS SPEC

AWS F-OrA. RATE

SHIELDMIN. RANGE

HOLDSPEC NO.

(mm)NO.

NO.CLASS NO.

(mm)(IImin) eC) eC) TIME

(HRS)

TML-1SR B,W. AJ·killed 1 <25.4 1 GTAW SFA 5,8 (5) 6 2.0 6 - 15 Low temp. service

(NACE) CS ER70S-X 2.4 & sour (NACE)(A333-6 or service.

eq.) 2- SMAW SFA 5.1 (5) 4 2.6 ,- - - 625=20 1or E7016-X 3.2(5) 4.0

SFA 5.5

TML-1HSR B.W. do 1 25.4 - do do do do do do do - 100 625±2O 1 Hr/in Low temp. service

(NACE) & sour (NACE)service.25.4 mmT isincluded.

TL-l B,W. do 1 s8.8 NI GTAW SFA 5.18 (5) 6 2.0 6 - 15 - - - Low temp. serviceER70S-X 2.4 & 2 NPS smaller,

all GTAW shall beused.

TL-l B.W. do 1 do do do do do do do do - . 625±2O 1 Low temp. service

(NACE) & sour (NACE)service & 2 NPSsmaller, all GTAWshalf be used.

TM-8(a) B.W. SS304L a <25.4 1 & 2 GTAW SFA 5.9 (6) 6 2.0 6 - 15

0Cryogenic service

(A312TP ER30aL 2.4 (~ -196"C)

304L or eq.)3- SMAW SFA 5.4 (6) 5 2.6 - .(7) -

E30aL-16 3.24.0

T·a(a) B.W. SS304L a s a.a AJI GTAW SFA 5.9 (6) 6 2.0 6 - 15 Yes -(7) - Cryogenic service

(A312 TP ER 308L 2.4 (~-196"C) & 2

304L or eq.) NPS smaller, allGTAW shall beused.

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WELDING WELD GASGAS

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BACKTEMP.

TEMP.MIN. REMARKS

NO. (1) MATERIAL p.RANGE

PASSPROCESS SPEC

AWS F- DIA. RATESHIELD

MIN.RANGE

HOLDSPEC NO.

(mm)NO.

NO.CLASS NO.

(mm)(Ilmin) (DC)

(DC) TIME(HRS)

TM-8(b) B.W. SS321 8 <25.4 1 & 2 GTAW SFA 5.9 ER347 6 2.0 6 .., 15

0(A312 TP 2.4321 or eq.)

3- SMAW SFA 5.4 E347·16 5 2.6 - -(7) - -3.24.0

T-S(b) B.W. do 8 sS.S All GTAW SFA 5.9 ER347 6 2.0 6 .., 15 Yes -(7) - - For 2 NPS &2.4 smaller, all GTAW

shall be used.

T-44 B.W. Hastelloy 44 s3.9 All GTAW SFA5.14 ER NiCrMo 44 2.0 6 .., 15 Yes - . - For 2 NPS &C-276 -4 or 10 2.4 smaller, all GTAW

shall be used.

T-34 B.W. 9/1 Cu·Ni 34 s6.0 All GTAW SFA5.27 (8) 34 2.0 6 .., 15 Yes . - - For 4 NPS &JIS YCuNi-1 2.4 smaller, all GTAW

shall be used.

TM- B.W. Galvanized 1 s 19.05 1 GTAW SFA5.18 (4) 6 2.0 6 .., 15 For galvanizedGalvanize CS ER70S-X 2.4 pipe.

2 - SMAW SFA 5.1 E7016or 4 2.6 - - -E7018 3.2

4.0

T· B.W. do 1 s 8.8 All GTAW SFA5.18 (4) 6 2.0 6 - 15 . - - - For galvanizedGalvanize ER70S-X 2.4 pipe & 2 NPS &

smaller, all GTAWshall be used.

TM·Alumi. B.W. Aluminized 1 s 19.05 1 GTAW SFA5.9 ER309Mo 6 2.0 6 - 15

0For aluminized

CS 2.4 pipe

2- SMAW SFA5.4 E309Mo-16 5 2.6 - - -3.24.0

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TEMP. TEMP.MIN. REMARKS


PASSPROCESS SPEC AWS F-

DIA.RATE

SHIELDMIN. RANGE

HOLDSPEC NO.

(mm)NO.

NO.CLASS NO.

(mm)(IImin) ("C)

("C)TIME(HRS)

T-Alumi. B.W. do 1 s a.s All GTAW SFA5.9 ER309Mo 6 2.0 6 - 15 Yes . . - For aluminized2.4 pipe & 2 NPS &

smaller, all GTAW, shall be used.

CSTS/OO7ATI

~. ,-' Attachrnent-t (6/6)

),'r

NOTES:

(1) WELD TYPE

Attachrnent-j OUTLINE OF WELDING PROCEDURE FOR PIPING

.;j

B.W.: Butt Weld (incl. Girth butt & Branch connection)Socket weld & fillet weld for pressure retaining weld and attachment weld to pressure retaining parts shall be made by GTAW or SMAW process using the same welding rod as specified for each WeldingTechnique No. with the same preheat and PWHT condition, if required.

(2) WELDING PROCESS

SMAW: Shielded Metal Arc WeldingGTAW: Gas Tungsten Arc Welding

. ~

-:

(3) PWHT

i) For Carbon Steel Material;Heating Rate: Max. 2OQ°C/hr·in above 400°C

(Max. 2000C/hr for 1· & below thickness)Cooling Rate: Max. 200°C/hr·in above 4000C

(Max. 2000C/hr for 1· & below thickness)

I

ijf j

f',II•

tv-s

(4)

(5)

(6)

(7)

(8)

ii) If PWHT is required for the process reason (NACE or caustic), all pressure retaining welds and attachment welds to pressure retaining parts shall be covered.

ER70S·X

ER70S-2. 6 or ER70S·G (Trade Name TGS-50. Kobe Steel ltd.) or equivalent.

Welding Material for CS (NACE • Sour) Service

GTAW: Trade Name TGS·IN (Kobe Steel ltd.) or equivalent.SMAW: SFAS.5, E7016-G (Trade Name LB52NS, Kobe Steel ltd. or equivalent) or SFA 5.', E7016-1These welding material shall be selected taking consideration of para. 3.2.2(a), (b), (d), 3.4.3, 3.4.4, 3.4.5 & 3.4.6 of this specification.

Welding Material for SS304L (Cryogenic Service)

Weiding material of E308L·16 shall be required to Iollow to para. 3.2.2(b), (e), 3.5.3. Prequalification test at ·196°C shall be required.For E308L·16, WEl308LA (Nippon Welding Rod Co.), NC38LT (Kobe Steel ltd.) or RNY308LA (Nippon Oil & Fats Co.) is recommended.

Max. Interpass Temp. for SS Welding

It shall be max. 1rrc.

JIS YCuNi·l

TCu·9R (Tsuruya Welding Co. Japan) is recommendable.

CSTSIOO7ATl

WELDERWELDING TECH. BASE METAL REQUIRED TEST QUALIFIED RANGE

PERFORMANCENO. TO BE USED TESTOUAlIFICATION

FOR TEST POSITION THICKNESS REMARKSTEST NO.

(1)MATERIAL P PIPE SIZE VISUAL

RTP,

FNO. RANGEPIPE00 WELDING

(WPOT-NO.) SPEC. NO. (2) TEST NO.(MM)

(NPS) POSITION

WPOT·l TM-1 CS 1

~6G Yes Yes 1 6+4 upte 2-1/2 & All CS Piping Welder

(Al06-B, (18.2 ~...J overAPI5L·B ~

or eq.

WPOT-2 T·l do 1 2" SCH 80 6G Yes Yes 1 6 up to 11 3/4 &over All CS Piping Welder(5.5 t) (GTAWfor small dia.

pipe)

WPOT-3 M·l do 1 6" SCH 60 6G Yes Yes 1 3+4 up to 22 3 &over All CS Piping Welder(11.0 t) (Root pass by SMAW•

E6010)

WPOT-4 TM·8(a) SS (3) 8 6" SCH 60 6G Yes Yes 8 6+5 up to 22 2-1/2 over All SS Piping Welderor (A312·TP304L (11.0 t)

TM-8(b) orA312-TP321)

WPOT-5 T-8(a) do 8 2" SCH 80 6G Yes Yes 8 6 up to 11 3/4 & over All SS Piping Welderor (5.5 t) (GTAW for small dia.

T-8(b) pipe)

WPOT·6 T-44 (4) 44 2" SCH 40 6G Yes Yes 44 44 up to 7.8 3/4 &over All Hastelloy PipingHastelloy (3.9 t) Welder

C·276 (GTAW for small dia.pipe)

WPOT·7 T·34 (5) 34 2" SCH 40 6G Yes Yes 34 34 up to 7.8 3/4 & over All 9/1 Cu·Ni Piping9/1Cu·Ni (3.9 t) Welder

(GTAW for small dia.Pipe)

WPOT-8 (6) CS Plate 1 9 ..... 25 t 2G & 3G Yes Yes 1 4& up to 2 t - lG,2G, Structural Welder for(Plate) under 3G Groove Weld

WPOT·9 (6) CS Plale 1 6"'" 12 t 3F, 4F Yes (7) 1 !4&\ All - Ail Structural Welder for(Plate) \. under I Fillet Weld

WPOT-l0 (8) do 1 6 ..... 12 t 3F, 4F Yes (7) 1 2 & 1 All . All Structural Welder for(Plate) Fillet Weld

1

,tr

1,:

!

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, ~

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Attac"'-:ent-2 STANDARD OF WELDER PERFORMANCE QUAUFICA._;" TESTAttachment·2 (1/2)

CSTSIOO7AT2

Note: (1) Refer to Attachment-f.

Attac;....,.Jnt.2 STANDARD OF WELDER PERFORMANCE QUALIFICA. J TESTAttachment·2 (2/2)

(2) Size & wall thickness of Test Pipe and Plate may be changed. However, in such case, QUALIFIED THICKNESS RANGE and QUALIFIED PIPE 00 shall be changed in accordance with ASME IX.,('~~

\(3) Stainless steel pipe shall be used for TEST. Carbon steel pipe is not permitted.

(4) Hastelloy C·276 pipe shall be used for TEST. Carbon steel pipe or stainless steel pipe is not permitted.

(5) 9/1 Cu-Ni pipe shall be used for TEST. Carbon steel pipe or stainless steel pipe is not permitted.

(6) AWS E7Q16 or E7Q18 shall be used.

(7) RT and macro-examination may be omitted, but subject to Chiyoda/COMPANY's approval.

,'.!

.;

Cv'0

(8) AWS E6013 or equivalent shall be used.

CSTSIOO7AT2

Mc:::!s T80984

FORM Z·I 984 E ATTACHMENT-3

MANUFACTURER'S RECORD OF WELDER OR

WELDING OPERATOR QUALIF1CATION TESTS

Welder Name Stamp No.

Welding Procedure Gas TypeSpecification No. Percent CompositionWelding Process Weld Progression

TypeBacking Other

Material Specifica tion toP No. to P No. FOR INFORMATION ONLY

Thickness DiameterFiller Metal Specification No. Filler Metal, Diameter and Trade Name

Class No. F No.Other Submarged Arc flux Trade Name

Position .Electrical Characteristics Gas Metal Arc Welding Shield Gas Trade Name

Current AC or DCPolarity

GUIDED BEND TEST RESULTS

Type and Figure No. Result

I

RADIOGRAPHIC TEST RESULTSFOR ALTERNATIVE QUALIFICATION OF GROOVE WELDS BY RADIOGRAPHY

Radiographic Results:

FILLET WELD TEST RESULTS

Fracture Test (Describe the Location, nature and size of any crack or tearing of the specimen)

Length and Percent of Defects %Macro Test-FusionAppearance-Fillet Size(1eg) X Convexity or Concavity

CERTIFICATE OF COMPLIANCE I

ITest Conducted by Laboratory Test No.

IWe certify that the statements in this record arc correct and that preparation, welding and testing of the testwelds conform to the requirements of the project specification

OrganizationDate By

(Detail of record of tests are illustrative only and may be modified to conform to the type and number oftests required by the project specification.)

WELDER's Name :

Photo

5 cm x 5 cm

Arrival Date :

Departure Date :

Qualification

WElDER'S PERSONAL RECORD

Stamp No. :

His Figure1. Date of Birth2. Nationality3. Address

4. Physical featureHeight:Weight:etc.

Attachment-4

Type of QualificationDisqualifiedDate Thickness Pipe Dia. DateProcess F-No. Position

Range of Size

QCPCOO5/ATI4(SPEC)

.~4 - _~:.'.' ..... ~t

-----s.: .~.~.:'." -._-.'

)

WELDER'S IDENTIFICATION LABEL

8CM

STAMP NO.------PROCESS

F - NO.

POSITION

Attachment - 5

Color of Label: White, Pink, Blue, Yellow, Red

)

_1 ...• --~: ..-"'::.......-. ,,"-- ........ '1:':-.-_...- ..... ""~_"---..:'"'•. ~_.'--> ..-r r:... -~-~.~.

~vCHIYODA C08POPJnOI

DAILY PREFAB WELDING REPORT

ATTACHMENT-6

'WELD DATE GRP , AREAY Y M M D D CODE CODE

MADE BY CHECKED BY APPROVED BY

-l ~o \VELDER NO.WELD [;,¢ ~

D\VG NO. JOINT NO. PIPE SIZE r- :::!- ..."

0< zr- :::0~ ~u ROOT COVER TYPE 0< -~v U

~~~

~I- B I C I F

V l"" \-~ ~~ B I C I F

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~\- ..~ ~ B I C I F~

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J I B i C i F

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V I B;' C ! F....

- \ ~.",I B, C i F

- ! I B C F

- I I B:' C' F

I-! I I I I I I I B C:FI

I-I I i I I I:" I I I I B .. C:' F

I I I ! I II I B C ,! F- I I

-I I

I II I B C F

- I I B C :' F

-! Ii I I I ! R C F

I I

- I B i c t v- I -S/C/F

- I B i C / F

- I B I c , r

- I B / C / F,- .

- - I B / C ! F

- I I B i c t F

- J B/C/f. .~~~;.::,

- I B / C ! F

- - - ' 1 - ,

B / c t v- -..,. -'..--

Note:

(I) Materia I I =Carbon Steel, 2 =Alloy SteelJ =Stainless Steel. 4 =Others

(2) \Veld Type B =Girth Butt \\'cld. C = Branch Connection \Veld. F = Fillet \\'dd

(3) Construction: I = Critical. hazardous service. 2 = General refinery service,Category 3 = Utility service

.'_:5.:

(4) Rework Enter ~X"or-Y-'when rl'\\orking

'.", •• ,."" ~ :.';' ...... :;.. '~~T ._: _. " •• :-::.~_:.- "

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ATTACHMENT-7

FADRCATIOH

a FIELD.

REVLSIOH

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<c x w a'

'-SSLED FOR COHST.DESCRIPTIONno.

PAltlTlHO

FOR

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• I HEAT. TREATMEttT './ '., .:.! ..•• ' , 1,', \;'11.. . .. . " ., ." .,..

I' . )d :.HO .~ 'I ;·fl~,). U."VES ,~\(ii'~~:~~;~.::i".· ;..:(:r;f.~y,' TEST DATA ...,y.... ' .., . .3' ., .. h-)f

J. CODE. -. "."; ;'ANSI }\,31. . .':.' ....:.~.;.:....~i' .:; WELDViO Q HO -:. ,,: II WELDER a DEVEL • a V\SUALI . '0 X·RAY· .[]HT.TF\. aOVE PEH. aHASlO. . ... l;~..\.=~. .PAES,SU.FE. Q ~Y,l?BO.\, 0 PH~~~ :. a STEAL{. ~ a HI ,;.:.; .. :';.:-~;:~:;~

'lo • • • '. :.. ~~ i";":.::. ,1, .,1,'.... 1,0~T~H~ER~S~~:;::::::=====::y~~==:=:=::;=::=====-1 "l'Ir-: 0 (~'.'. I :'. STRESS CHECK.. ', I Ii:

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!. I INSULATINO

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'.......• :",,"0

JOINT. \ofELDER RT PT/MT P'yHT HA~t-\NO. NO. ,

... err)... .. 1 '. 1'1'-01 Aoool 8000/. coqo/ -Dc....

: .......

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Client

Project Title

Name of Equipmentand Identification No.

RADIOGRAPHIC EXAMINATION REPORT

QATAR LIQUEFIED GAS COMPANY LTD.

QGL

Attachment-s

Mark Material Inspector

of & Defect Judgement Date RemarksFilm Thickness Chiyoda COMPANY

#

-

r.

Signature: COMPANY

Date _

Signature: CHIYODA

Date _

Signature: SUBCONTRACTOR

Date

OCPCOOS/ATT8(SPEC)

'.- ..... ""; . ~-, . -', -'-'

RADIOGRAPHIC EXAMINATION REPORT (EVERY 2 WEEKS)

REPORT NO.

SUBCONTRACTOR

PERIOD

Attachment-9

o

Number of Number ofAccepted Rejected

AcceptanceRemarks

Joint Film Ratio (%)

This Period

--Accumu.

Substance of Defect

Kind ofC P SL LF IP UC CRP ERP

Defect

No. ofFilm

Accumu.

n Remarks Total

No. offilm

Accumu.

C Crack

P Porosity

SL Slag Inclusion or Elongated Defect

LF Lack of Fusion

IP Incomplete Penetration

UC Undercutting

CRP Concave Root Penetration

ERP Excess Root Penetration

aCPCOOS/ATT9(SPEC)

SUB-CONTRACTOR

Attachment-10

WELDER'S CONTROL SHEET BY RADIOGRAPHIC EXAMINATION (EVERY 2 WEEKS)

PERIOD

Welder's Name Number of Number ofAccept Reject Acceptance

Remarks& Stamp No. Joint Joint Ratio (%)

I Accumu.

Kind of C P SL LF IP UC CRP ERP Other TotalDefect ( )

No. ofRim (

~..Accumu.

.Welder's Name Number of Number of

Accept RejectAcceptance

Remarks& Stamp No. Joint Joint Ratio (%)

I Accumu.

Kind of C P SL LF IP UC CRP ERP Other TotalDefect ( )

No. ofFilm

Accumu.

Welder's Name Number of Number ofAccept Reject

AcceptanceRemarks

& Stamp No. Joint Joint Ratio (%)

I Accumu. . .,Kind of C P SL LF IP UC CRP ERP Other Total'-'Defect ( )

No. ofRim

Accumu.

Welder's Name Number of Number ofAccept Reject

Acceptance Remarks& Stamp No. Joint Joint Ratio (%)

I Accumu.

Kind of C P SL LF IP UC CRP ERP Other Total

Defect ( )

No. ofFilm

Accumu.

aCPCOO5/ATT10(SPEC)

CLIENT

PROJECT TITLE

PERIOD FROM

RADIOGRAPHIC EXAMINATION REPORT (MONTHLY)

REPORT NO.

DATE

TO

Attachrnent-t t

Total Film SheetAcceptable Film

Repair Film SheetAcceptance Ratio

Area & Welder Sheet (%)SUBCONTRACTOR Stamp No.

Period Accum Period Accum Period Accum Period Accum

.

TOTAL

Signature: Signature:

CHIYODA SUBCONTRACTORWELDING ENG'R WELDING ENG'R

OCPCOOS/ATT11 (SPEC)

t.

(

--.; _ ..... J ~ ;-. _ ~ '"

i'

Un usedManua I I

Consumables

lII~

Fabrication

II

DRYING INSTRUCTION I

~l'o/.1- O~'Yo~ S~A

;r/At 1~l\Irc c 0,(-

-<1~O

Consumable TransferQuaranti ne

Storage

ChemicalAnalysis

~~ IQuality Control

System Audit (R) IFabrication Records

ConsumableCR

Delivery~~l>C)2oZl> m:omo~

zG)

o'i1 CJ)

~ drn :0 (/)r- l> 4~ G) l>2 m ZC) l> an Z l>00:02 n 0(/) 0 ...&

C 2 en~ 4 ttll> :0OJ ar- r-m(/)

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.-- "'tJl>G)

enmZo

FIG.1

® Indicates Record Required

FLOW CHART FOR A TYPICAL CONSUMABLE CONTROL PROCEDURE

--

~1-31-3~o::r:~z1-3I

......N

r •

I

Sample of Welding Material Control Room and Facilities

measuring placeof weight ofwelding materials

350°C ~00C I 2 cycles in a day60 min. 60 min.

capacity : 100 kg 50 kgelectrode: E 7018 E 308

E 8016-82E 502

keeping (warming) ovens

1100-140°cl~~1 do. I~~capacity: 100 kg 50 kg 50 kg 50 kg 50 kg 50 kgelectrode: E 7018 E 7018 E 7018 E 8016-82 E 308 SPARE

E 502

Attachment-13

Type and usage of drying and keeping ovensDrying ovens

Given conditions:numbers of welder ... 50quantity of electrodes to be used in one day. .. 300kgtype of electrodes '00 E 7018,

E 8016-82,E 502E 308

NOTE: .

door

marking of welder'sstamp number on thefloor

door

reception counterof "WELDING MATERIALREQUEST CARD II

01 02 03 04 05

06 07 08 09 10

11 12 .. ..

48 49 50

potable dryerplacing area (on the floor)

drying keeping ovenoven 50 kg 50 kg 50 kg50 kg

keepingoven

50 kg

keepingoven

50 kg

keepingoven

100 kg

dryingoven

100 kg

1

on the table

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QCPC005!ATT13(SPEC)

Attachrnent-14

SAMPLE OF wWELDING MATERIAL REQUEST CARD W (/)

WELDING MATERIAL REQUEST CARD

DATE OF DELIVERY STAMP NO. OF WELDER

YEAR I Month I DateI II II II II II I

CATCH)BRAND NAME OF MATERIAL DIAMETER REQUESTEDNO. QUANTITY

rom kg

rom kg

rom kg

rom kg

WELDING FOREMAN

Date I Signature~iIII

l

MATERIAL CONTROLLER

Date I Signature:IIIII

(WORKING AREA

QCPC005/ATT14(SPEC)

~/

- .. _.-..~~-~~ -, '¥" - -- ~ ;>. . (-..',

,::'

Attachment-IS

DRYING CONDITION OF ELECTRODES

FILLER TYPE OF DRYING & RE-DRYING CONDITION KEEPING CONDITIONBASE METAL METAL

(AWS CLASS) COATED FLUX TEMP. (OC) HOLDING TIME (HRS) TEMP. (Oc)

Carbon Steel E7016 Low Hydrogen 300 ... 400 1 100 ... 150(incl. Low E7018Temp. CS) E7016-G

E7016-1E7018-1

Austenitic E308L-16 Line Titania 150 ... 250 1 100 ... 150Stainless E347-16Steel E309 Mo-16

Hastelloy E NiCrMo-4 Line Titania 150 ... 200 1 100 ... 150C-276

9/1 Cu-Ni E CuNi Line 150 ... 200 1 100 ... 150

Note: The drying & keeping condition listed herein is general instruction only.Thus, Subcontractor shall follow to consumable material supplier's instructionofficially, when any conflict happens.

~.~

./,-",

QCPC005/ATT15(SPEC)

ABC

Highlight

ABC

Highlight

ABC

Highlight

ABC

Highlight

Attachment-16,;,1

",.'

Work/Control Flow for Postweld Heat Treatment..

"

J;

;.\1

r ~1

@= RETENTION0= REVIEW[» = ORIGINATELEGEND:

PIPING SUBCONTRACTOR PWHT CHIYODA COMPANYOC INSPECTOR SUBCONTRACTOR OC INSPECTOR

ACTION BEFORE Confirm weld completion and necessary Check/approve "Application for PWHT"PWHT inspection before PWHT

1) C. Steel weldVisual Inspection

Originate "Application for PWHT"

Identification marking on actual weldswith Color Tag "Green"

DURING PWHT BY • Check preparation of PWHT Monitor PWHT operationPWHTCREW (Thermocouple, heating and insulation

pad location, and weather protection,etc.)

· Check PWHT condition against therequirements

ACTION AFTER PWHT • Check PWHT Chart Check PWHT Chart and Hardness . Review PWHT Chart and HardnessRecord

· Perform Hardness TestRelease for final NOT after PWHT

• Submit PWHT Chart and HardnessRecord

DOCUMENTS

"APPLICATION FOR [> 0PWHT"Perform PWHT I

"PWHT CHARTIHARDNESS TEST [> -0RECORD"

fI

one copy _ one copyI,

,~

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-- ,1-QCPC005/ATT16(SPEC)

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Attachment-17

Work/Control Flow for RT

PIPING SUBCONTRACTOR RT CHIYODA COMPANYOCINSPECTOR SUBCONTRACTOR OCINSPECTOR

ACTION Confirm weld completion and necessary Confirm location/marking and perform Check/approve "Daily Request for RTM, . Review films and RT record.inspection before RT RT

Review films/RT record with finalOriginate "Daily Request for Prepare RT Record with initial interpretation,Radiography" interpretation

Check record of RT result on weldingIdentification marking on actual welds inspection check sheet with pipingwith Color Tag "Yellow" Subcon.

Receive RT Record copy and record theresults on welding inspection checksheet of each OC ISO Dwg.

Request RT Subcon to perform RT,

In case of repair, identification markingon the weld with Color Tag "Red"

DOCUMENTS

a) Daily Req't for RT C>Perform RT

b) RT record with film C> ~

C?one copy one copy

•

',\:

,~

LEGEND:

(J-.......

;

[> = ORIGINATE 0= REVIEW @ = RETENTION,

QCPC005/ATT17(SPEC)

...

Attachment-18 (1/2)

INSTRUCTION FOR SELECTING WELDS

FOR RADIOGRAPHY

1. 100% RT means RT of all entire circumferential girth butt

welds.

10% RT means RT of one entire circumference girth butt

weld in total 10 circumferential girth butt welds.

2 • Selection of Welds for 10% Random Radiography

In principle, 10% of welds shall be randomly selected per

·each ISO Dwg. as follows:

Total Joint Numbers*per each ISO Dwg.

1 - 14

15 - 24

25 - 34

35 - 44

Min Number of RT to betaken

1

2

3

4

*Total joint numbers means total number of girth butt

welds.

10% RT for prefab-shop-welds shall be 10% of total prefab

shop-welds per each ISO Dwg. according to the above table.

10% RT for field welds shall be 10% of total field welds

per each ISO Dwg. according to the above Table.

RT selection shall be as follows:

QCPCOOS/ATT18(SPEC)

ABC

Highlight

ABC

Highlight

ABC

Highlight

ABC

Highlight

ABC

Highlight

ABC

Highlight

· .. )

Attachment-18 (2/2)

(a) Do not always select the easy welding (position) such

as pipe to flange joint, include difficult welding

(pos i.t.Lon ) .

(b) Select the welds of each welder's production welds

and spread out equally as long as possible.

3. For Welder Control

First 3 production welds of each welder shall be examined

by RT, and trace examination shall be carried out in

accordanc~with para. 5 of this specification.

QCPCOOS/ATT18(SPEC}

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. !", CHART-' OVERAll WORK flOW fOR CQNTBa..OF WELDERS

CHART-' ~

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Not less than 50/ 0 of

each welder's productionwelds

Acceptable welder

r-------------------------,V I

Execution ~ Periodical evaluation I

of welding of welder's performanceby RadiographicExamination ( in every2 weeks)

----~

Acceptance criteria ofeach welder's performance

first 3 production welds

Initial evaluation ofwelder's performanceby RadiographicExamination

Acceptable,., -., welder

-- --~Trial execution

of welding atfirst stage

- ---~Registrationof Qualified

welders withStamp No.

----~New

Qualificationof welders

WORKFLOW

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Acceptance criteria' ofeach welder's performance

See CHART - 2 See CHART - 3

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PerformanceOualihcalionRecord

(Allachment-3)

Welder'sIdentificationLabel

Welder'sPersonal Record

(Allachment-4,S)

Daily WeldingReport

Recording ofeach welder'sproductionwelds on PipingDwg.

RadiographicExamination Report

(AUachmenl-6)

Daily WeldingReport

Recording ofeach welder'sproductionwelds on PipingDwg.

Radiographic ExaminationReport,

Radiographic Examination

Report (Every 2 weeks),Welder's Conlrol Sheet byRadiographic Examination(Every 2 weeks),Radiographic ExaminationReport (Monthly)

(Allachment·6,7,8 & 9)

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CHART·2 INITIAL EVALUATIONOF WELDER'S PERFORMANCE

BY RADIOGRAPHIC EXAMINATION

First 3 production welds of each newly qualified welder shall beradiographic examined regardless of material service class.

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CHART·2

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1. Result of RT Case 1 Case 2 Case 3 Case 4

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2. RT of 2 additional joints not required /r.qUired~ not required not required(stop welding) (stop welding)

./ ,II ~3. Result of RT 00 00 ®®

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4. Judgement of welder's performance Acceptable Acceptable Unacceptable Unacceptable Unacceptable Unacceptable(Disqualify) (Disqualify) (Disqualify) (Disqualify)

Note: 1. 0: Accepted by RT, @: Rejected by RT

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2. Acceptance criteria of Radiographic Examination shall bein accordance with Table 341.3.2A of ASME B31.3.

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1. Extent andType of RT

CHART-3 PERIODICAL EVALUATIONOF WELDER'S PERFORMANCEBY RADIOGRAPHIC EXAMINATION

Extent of Radiographic Examination shall be in accordance with therequirements of the job specifications. In principle, the welds to beexamined shall be selected to ensure that not less than 5% of productionwelds of each Individual welder are included. •

Random radiographic examination (not less than 5%) andthe progressive examination

(see para. 341.3.4 of ASME 831.3)

CHART-3

Regardless of extent and type ofradiographic examination

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,: Case 2II

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~-------- ------r------ -------When all of the : When any of thethird groups are I third groups areaccepted by RT : rejected by RT

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2. Result of RTI

(I) Original :IIIIII

---------------fProgress 'Examination

(Ii) SecondGroup RTof 2additionaljoints

I----------------f(Iii) Third Group :

RT of 2 :additional :joints per :eachrejecteditem

Case 1

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C!:90%

Acceptance ratio of R.T. filmin every 2 weeks

80-90%

,

<80%

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3. Judgement ofwelder'sperformance

i

Acceptable Acceptable

i

Acceptable Unacceptable(Disqualify)

Acceptable Acceptable withWarning Letter

Unacceptable(Disqualify)

Note: 1. 0: Accepted by RT, ®: Rejected by RT

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2. Acceptance criteria of Radiographic Examination shall bein accordance with Table 341.3.2A of ASME 831.3.

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aCPCOO5/CHART3(SPEC)

piping specification

Documents

welding procedures

welding of hastelloy

welding procedure3

general welding requirements

minimum welding requirements

welding of carbon steel

welding consumable materials7

return of welding materials