~v CUiYOM CORPORATION 5PEC NO. 010/00/00/C5/T5/00/007 PAGE NO. 1 OF 31 JOB NO. 21053
SPECIFICATION
GENERAL WELDING REQUIREMENTS AT SITE
CLIENT:
QATAR LIQUEFIED GAS COMPANY LIMITED
PROJECT TITLE: QATARGAS LNG PLANT PROJECT LOCATION:
RA5 LAFFAN, QATAR
CHIYODA JOB NO. : CHIYODA PROJECT:
21053
QGL PROJECT
RECEIVED 1 6 MAY
1!~i
D&s
1
0
NO.
ISSUE FOR CONSTRUCTION, INCL. COMPANY COMMENTS (T- He - 22 rs) ISSUE FOR APPROVAL ORIGINATION (O)/REVISIONS
I
CONTROLLED DOCUMENTS
Ju ly 12 '94
Apr i 1 22.' 94
ye~l: .A7'~~: ~~ ~~)~L'
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BY
CHKD
APVD
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DATE
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CHIYDOA CORPORATION SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 2 OF 31
SPECIFICATION
CONTENTS
1.
SCOPE
2.
REFERENCES 2.1 Code 2.2 Specification 2.3 BP Standard
3.
WELDING PROCEDURE 3.1 General 3.2 Welding Procedure for Piping 3.3 Welding Procedure for Other than Pipin 3.4 Welding of Carbon Steel and Low Temp ~c~a-rb-o-n-S~t~ Piping 3.5 Welding of Austenitic Stainless Steel (SS 304L & 321) Piping 3.6 Welding of Hastelloy and Cupro-Nickel Piping
.
~
4.
WELDER PERFORMANCE QUALIFICATION TEST 4.1 Genera 1 4.2 Preparation for Test Coupon 4.3 Execution of Test Welding 4.4 Required Test and Acceptance Criteria 4.5 Record of Test
5.
WELDER CONTROL 5.1 Registration 5.2 Identification of Welder 5.3 Execution of Welding 5.4 Evaluation of Each Welder's Performance 5.5 Training and Requalification Test for Unacceptable Welder
6.
DOCUMENT CONTROL
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~ CHIYODA CDHPDRAnOI SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 3 OF 31
SPECIFICATION
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7.
CONTROL OF WELDtNG CONSUMABLE MATERIALS 7.1 Responsibility of Subcontractor 7.2 Responsibility and Right of Chiyoda/Company 7.3 Storage of Welding Consumables 7.4 Drying and Issuing of Welding Consumable Materials 7.5 Return of Welding Materials to Control Room
8.
QUALITY CONTROL PROCEDURE 8.1 General 8.2 Required Quality Control Procedure
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CHIYODA CDRPDRADOI SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 4 OF 31
SPECIFICATION
1.
SCOPE This specification covers the requirements~0welding in field construction, such as welding procedures, welding procedure qualification tests and welder performance qualification tests~ piping, as well as quality control in field construction work for QATARGAS LNG PLANT PROJECT for QATAR LIQUEFIED GAS COMPANY LTD. QATARGAS) at RAS LAFFAN, STAGE OF QATAR. ~
This also specifies the minimum welding requirements for field structural steel and field erected tanks including welder performance qualification test.
)
The requirements for LNG storage tanks are covered by 012/07/71/23/PC/PR/010 IIEngineering Instruction Specification prepared by LNG tank contractor, thus, those requirements are excluded from this specification.
2.
ll
REFERENCE The following codes, standards and specifications shall be applied to the extent specified hereinafter:
2.1 (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
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CHIYDDA CORPORATIDN SPECIFICATION
2.2
SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 5 OF 31
(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 Storage Tanks"
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 SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 6 OF 31
SPECIFICATION.
Steel Pipework
ll
IIFabrication of Pipework - Part 2, Alloy Steel Pipework" IIFabrication of Pipework - Part 3, Austenitic and Duplex Steel Work, Cupro-Nickel and Nickel base Alloy Pipework ll
3.
WELDING PROCEDURE
3.1
General
3.1.1
Sub-contractors who will undertake field welding work for piping, structural steel, and tanks shall sUbmit~tailei)Helding Procedure Specifications (WPSs) to be used and supporting We'lding Procedure Qualification Test Records (PQRs) to CHIYODA/ COMPANY for approval prior to commencement of any welding work.
3.1.2
PQRs obtained from other projects shall not be accepted, thus, qualifications or re-qualifications shall be carried out specifically for this project.
<0
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For piping welding, all the requirements of this specification and "Genera 1 We 1ding Requ i rements" (003/00/00/ME!TS/OO/Oll) sha 11~
3.1.4
For structural welding, ANSI/AWS 01.1 or ASME IX shall be applied, though the specification of "Structural Steel - Material and Fabrication" (003/00/00/CI/TS/00/019) refers to BP Standard.
3.1.5
For field erected storage tank welding,
(()
003/00/00/~1E/TS/00/011
shall
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CHIYDOAcoRPoRAnoN SPECIFICATION
3.2 (/)
3.2.1
SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 7 OF 31
Welding Procedure for Piping @ 3 s h a l l be in accordance with Attachment-1 "Outline of Welding
Procedure for Piping". Detailed WPSs and their supporting PQRs for field piping welding shall be prepared by the Sub-contractors in accordance with Attachment-l and they shall be approved by CHIYODA/COMPANY prior to use. 3.2.2 )
In addition to the requirements of ASME IX, PQRs shall include the following test results: _.---'- -- .. - --- ----- - - -' ~_.-
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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 shall be 225 HB max. for non sour (non NACE) service. Production
(a)
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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 not required.
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(b)
Impact tested result for the WPS of low temperature carbon steel (A333 Gr.6 or A671-CC60) at -46°C and for the WPS of austenitic stainless steel in cryogenic service at -196°C shall be required in accordance with 003/00/00/ME/TS/00/011 and Table 323.2.2 & para. 323.3 of ASME B31.3.
(c)
For stainless steel welding consumables used for cryogenic service, each heat, lot, or batch of filler material and filler material/flux combination shall be "prequalification" tested (charpy impact tested) in accordance with para. 5 of 003/00/00/ME/TS/OO/011.
(d)
For low temperature carbon steel in sour (NACE) service (A333 Gr.6 or A671-CC60 at -46°C), in addition to the requirement of above 3.2.2(a) and 3.2.2(b),~metal containing more than 1%
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CHlYDDA CORPORATION SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 8 OF 31
SPECIFICATION
nickel shall not be permitted.
(I)
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3.2.3
If Sub-contractor wishes to use other welding procedures not listed in Attachment-I, he shall propose such welding procedures ~bY CHIYOOA/COMPANY.
3.2.4
For butt welding of small diameter plplng (2 NPS & below), all Gas Tungsten 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 shall be specified in the WPSs and PQRs.
3.2.7
Brand name and company name of welding consumables used for PQR's shall be({onsidere~as an essential variable for:)
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. 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 supporting PQRs in accordance with ASME IX and other applicable codes/specifications, and shall submit to CHIYOOA/COMPANY for approval prior to use.
3.3.2
For steel structures, WPSs and PQRs in accordance v~ith ANSI/AWS 01.1 or ASME IX shall be submitted to CHIYOOA/COMPANY for approval prior to commencement of welding work. "prequalified Welding Procedures" as per ANSI/AWS Dl.l may be acceptable when all the requirements of' ANSI/AWS 01.1 are fully satisfied, but limited to mild carbon steel of which the minimum specified tensile strength is 65,000 psi. or less.
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~ CHIVODA CDRPDRATIDI SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 9 OF 31
SPECIFICATION
)
3.4
Weldin
3.4.1
All pressure retaining welds and attachment welds to the pressure retaining parts of piping shall be made bY~GTAW or SMAW processes using low hydrogen type electrodes except(~~,..t~ root passes of butt welds and branch connection welds.
3.4.2
Root passes of girth butt welds and branch connection welds where complete 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 joints shall be.~ith~GTAW process.
3.4.3
The WPSs for pip i ng in sour (NACE) serv i ce sha11 be those that can 0 satisfy maximum hardness requirement of 238 HV~for pin point peak hardness on WELD/HAZ/BASE METAL and 200 HB for production welds (on WELD). Max. pin point Vickers hardness shall be confirmed by PQR.
3.4.4
For welding procedure qualification of Low Temp.~~~on s~piping (A333 Gr.6 or A671-CC60), charpy V-notch impact tests on WELD/HAZ shall be@at -46°CG.~~r~~fug~nspecimen -. ~ Test procedure and accePta~ criter~shall be in accordanCe with 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
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of Carbon
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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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CHIYDDA CORPORATION SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 10 OF 31
SPECIFICATION
carbon.steel plplng, Low Temp.~arbon s~PiPing, carbon steel sour (NACE) service piping, and caustic service carbon steel piping, Subcontractor shall consider~type of weldin§~~~~~~~l~~ meet all the requirements. \!hese consumables shall be approved by ,--.., ,CH!YODA/COMPANY in advanc~
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3.4.7
AllSwelding shall be uphill forSvertical
~weldinfis~~ 3.4.8
(/)
8
For carbon.stee 1 wit h t hickness of 25. 4mm (1 i' nch) & 0 ver , ~ ~O°C ~~ preheat sha11 be app 1ied. The preheat temperature sha11 be maintained over a distance of 75mm (3 inch) on either side of weld. Oxy-acetylene welding or cutting torches shall not be used for preheat ing, ~ly specif i ca11y des ig;ed heat i ng torches, gas rings or
~~C:l h~a~rs ~ll~be~ 3.4.9
Position,~
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PWHT shall be required forSwe1ds. 1) if
the~rentiaI:~ut0
weld thickness exceeds 19.05mm (3/4 inch) for carbon steel of general service (non-sour, non-NACE), 2) if the process is sour (NACE) service regardless of thickness, 3) if PWHT is required for all welds from process reason (caustic service, etc).
)
When PWHT(£S
~~for
process reason (sour. caust i c , etc). all
the pressure retaining welds and~attachment welds pressure parts shall be post weld heat treated regardless of the thickness. The PWHT condition shall be as follows: Holding Temp. 625 ±20°C Holding Time 1 hour per 1 inch thickness (min. 1 hour) . Heating & Cooling Rate above 400°C: Max. 200°C/hr for 1" & below thickness Max. 200°C/hr*t(inch) for above I" thickness ~----
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""" CUIYODA CDRPDRAnDN SPECIFICATION
o 8
~welding
SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 11 OF 31
@GALVANIZEO carbon steel
PiPeJ0~tee:Dwelding
consumables shall be used.
(/)
Cf£D) @welding@ALUMINIZED
carbon steel pipe, AWS ER309MO/E309MO welding 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 welds of p.iping{1shall be made by the GTAW process. For the subsequent passes of groove welds or fillet welds shall be made by SMAW or GTAW. For small diameter piping (2 NPS & below),@GTA"W processeD shall be applied. Multi-pass welding (at least min. 2 passes) shall be required.
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3.5.2
<2> 3.5.3
Internal gas purging with pure Argon gas shall be required for ~~~ra~connection welding by GTAW. For the selection of welding materials for SIS 304L in cryogenic service, special care shall be taken in accordance with para. 3.2.2 (b) & (c) above. The ferrite content of SMAW consumable for cryogenic service should be 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 with generally higher impact values than those of SMAW. Prequalification of welding consumable per each heat, lot, or batch and filler material/flux combination at -196°C sha'll be followed in accordance with para. 5 of 003/00/00/ME/TS/00/Oll.
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3.5.4
AllSweldi~~ shall be uphill for vertical Position,~ '~ing is not ~ermitte0
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~ CHIYDDA CDRPDRADDI SPEC NO. 010/00/00/CS/TS/00/007
SPECIFICATION
o
PAGE NO.
12
OF
31
for~t:~ic~eld0
3.5.5
PWHT is not required
3.5.6
Max. interpass temperature shall be 177°C (350°F) for austenitic stainless steel welding. The interpass temperature shall be checked by temperature indication crayon or equivalent.
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
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.
.
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
3.6.1
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
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and NPS respect ive ly. Mu 1t i -pass we 1di nq (at least mi n. 2 passes 'Grequ ired. 3.6.2
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3.6.3
<0
3.6.4
Internal gas purging with pure Argon gaS®required for butt branch connection welding by GTAW.
&
Internal and external~f~C~Of pipes to be welded shall be clean for a distance at least 25mm from the fusion face.
(G~~hi~ith grinding
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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~ CHIYODA CDRPDRAnUN SPECIFICATION
SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 13 OF 31
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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.
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4.
WELDERS PERFORMANCE QUALIFICATION TEST
4.1
General
4.1.1
All welders and welding operators engaged in field welding work (hereinafter called welder) shall be newly qualified in accordance with applicable codes and the requirements herein under the witness of CHIYODA/COMPANY's representatives before the commencement of any welding 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
~
welders&prOje~
<0 4.1.3
._)
Standard test procedure and qualification range for piping welder and structural welder are listed in Attachment-2 . Classification of welders are as follows: (a)
Piping Welder: Welder who can make the pressure retaining butt welds, branch connection welds, socket welds and attachment welds to the pressure retaining parts of piping and equipment within the qualified range of ASME IX and Attachment-2. Classification of piping welders are following four types:
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Carbon Steel Piping Welder: (for P-No.1 mati 1) (incl. low Temp.~
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y CHIYODA CORPORADOI SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 14 OF 31
SPECIFICATION
Stainless Steel Piping Welder: (for SIS 304L & 321)
(for P-No.8 matll)
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. ~
) (b)
Structural Welder: Welder who can make structural steel welding of mild carbon steel. 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 be required for all load bearing structural members such as pipe rack, duct, steel stack, pipe support, etc. Structural welder qualified for fillet welding only is acceptable for non load ·carrying member or minor load carrying member, such as instrument/electrical support, ladder, handra i 1, etc.
4.1.4
<0
For field erected storage tank welding, welders and welding operators shall be qualified in accordance with ASME IX.
4.l.S00nly qualified welders
canE~3tack welds.
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"'. CHIYDDA CORPORATION SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 15 OF 31
SPECIFICATION
4.2
Preparation for Test Coupon Test coupons for piping welder shall be prepared in accordance with the applicable welding procedure specification, pipe diameter and thickness listed in Attachment-2. For structural welder for groove welding, standard test coupon as shown 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 depend on production weld thickness, in lieu of backing plate, back chipping and back welding method may be used.
)
For structural welder for fillet weld only, test coupon shall be 150 mm length by 100 mm width carbon steel and 6-12 mm thickness. For tank welder performance qualification test, Sub-contractor shall propose 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's representative. Each welder shall be clearly marked on his back with the 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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"Rad ioqr aph i ca l ----------l y". Test ' \ SG for GTAW and SMAW process. ~
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weld~~~~~~IIVisuallylland
~
~tions shall be 2G +
(a)
-----.
Visual Inspection:
During and after welding, each
welder's~~;nce
and
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"" CHIYODA CDRPDRATIOI SPEC NO. 010/00/00/CS/TS/OO/007 PAGE NO. 16 OF 31
SPECIFICATION
G:it i t~~ sha 11 be checked. Externa 1 we 1d re i nforcement and i nterna 1 protru s ion sha 11 be fu sed wi th and .sha11 be merged smoothly into the component surface. Cracks., incomplete penetration, surface porosity, exposed slag inclusion and undercutting (over 0.4 mm depth) shall not be permitted. Radiographic Examination:
(b)
Acceptance criteria shall be in accordance "'ith the Table 341~3.2A~evere Cyclic c~nditio~Of ASME 831.3. 4.4.2
Structural Welder: Structural welder for groove weld shall be judged by "Visual and IIRadiographic examination. Acceptance criteria for radiographic examination shall be in accordance with the QW-191.2.2 of ASME IX. ll
ll
For fillet welder, the weld shall be examined by IIVisual IIFracture Test and IIMacro Examination 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 with the consensus of CHIYODA/COMPANY·s representative. ll
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4.4.3
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,
Tank Welder: In addition to visual inspection, radiographic examination shall be carried 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 shall not be allowed for the welder performance tests fOl~ this project, even if QW-304.1 of ASME IX gives its permission.
4.5
o
Record of Test After@welder's performance qualification test, Sub-contractor shall
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. . CUIYOM CDRPDRAOOI SPECIFICATION
SPEC NO. 010/00/00/C5/T5/00/007 PAGE NO.
17
OF
31
provide ~Manufacturer's Record of Welder or Welding Operator Qualification Test" (Attachment-3) with the photograph of each welder, and submit to CHIYODA/COMPANY for approval prior to commencement of any field production welding work.
5.
WELDER CONTROL
5.1
Registration After review of "Manufacturer's Record of Welder or Welding Operator Qualification Test" (Attachment-3) at field site, his name, his classes of qualification and his photograph shall be registered with stamp number in each welder's personal record (Attachment-4). The history of qualification such as changes of class at field site shall 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's IDENTIFICATION LABEL" (Attachment-5) showing his classes of qualification onto the right side of welder's goggles mask. Discrimination of "WELDER'S IDENTIFICATION LABEL" is indicated in Tab le-l.
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CHlYDOA CDRPDHAnD~ SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 18 OF 31
SPECIFICATION
Table-1 Color of Label
(/)
Discrimination of "WELDER IDENTIFICATION LABEL" Type of Qualification Material
Application
Welding Process, F-No. & Position
Piping Welder & Structure Welder (groove weld)
White
Carbon Steel
Pink
Carbon Steel
do
Structure Welder (fillet weld)
Blue .
Stainless Steel
do
Piping Welder
Yellow
Hastelloy C-276
do
Piping Welder
do
Piping Welder
Red
Marked on each label
(90/10) Cu-N i "-----"
5.3
<0
Execution of Welding Each qualified pipe welder shall perform actual~od~tio~welding in accordance with the qualified welding procedures. For identification~welds, each welder shall mark his stamp number adjacent to the weld immediately after completion of the welding. "Daily Welding Report" (Attachment-6) and IIIsometric Drawing or Spool Drawing (attachment-7) shall be submitted to CHIYODA/COMPANY every day for the purpose of weld quality control check. Attachment-6 & -7 are only samples. Sub-contractor may modify these documents for his convenience, but subject to approval from CHIYODA/COMPANY. ll
5.4
Evaluation of Each Welder's Performance
5.4.1
Evaluation Method Each Welder's performance shall be evaluated by the result of radiographic examination. Overall work flow for control of welders shall be referred in
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CUIYODA CDHPDRAnON SPEC NO. 010/00/00/CS/TS/OO/007 PAGE NO. 19 OF 31
SPECIFICATION
attached CHART-I. Acceptance criteria of radiographic examination shall be in accordance with para. 341.3.2 and Table 341.3.2A of ASME 831.3. CHIYODA/COMPANY's welding engineer has the right to reject welders after consideration of the result of radiographic examination, cause of 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 of radiographic examination shall be in accordance with the requirement of relevant specifications and piping service class. For welder's performance evaluation, in principle, the welds to be examined shall be selected to ensure that not less than 5% of each welder'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 made within every two weeks. For recording of radiographic examination results, "Radiographic Examination Report (Attachment-8 and 9), "Welder's Control Sheet by Radiographic Examination (every 2 weeks)1I (Attachment-IO), and "Radiographic Examination Report (Monthly)" (Attachment-II) shall be prepared by Sub-contractor. ll
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'Y·CHlYDDA CDRPDRAnON SPECIFICATION
5.4.3
SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 20 OF 31
Initial Evaluation First 3 (three) actual production welds of each newly qualified welder shall be radiographic examined regardless of material service class and evaluated according to the procedure indicated in attached CHART-2, that; -_.-------------------~------_.---.. '.
(1)
o
The results of the first 3 production welds are to be submitted to CHIYODA for review. All 3 production welds are acceptable, the welder shall be allowed to continue with production welding.
.....
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--"""------- -------------------_._-~
5.4.4
(2)
If one of 3 production welds is rejected, additional 2 joints made by the same welder shall be radiographic examined. If all of the second group are acceptable, the welder shall be acceptable. If any of the second group reveal defects requiring 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.
Periodical Evaluation A welder who passed the initial evaluation mentioned in para. 5.4.3 can continue production welding. Extent of radiographic examination for evaluation of welder's performance shall be in accordance with para. 5.4.2. Periodical evaluation shall consist of two types of evaluation as shown 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
~ CHIYDDA CDRPDRlTIDN SPECIFICATION
(()
SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 21 OF 31
be based on the acceptance ratio of~iap~c~ll~examination every 2 weeks. Acceptance ratio shall be defined as the ratio of numbers of film accepted by total numbers of film taken in a certain period. (1)
Individual acceptance ratio in 2 weeks is 90% and above, the welder 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.
(3)
Individual acceptance ratio in 2 weeks is less than 80%, the we 1der sha 11 be unacceptab 1e bas; ca lly, (@ consi d~rat; on @ the total numbers of film taken in 2 weeks, cause of defects, etc .... shall be made by CHIYODAls welding engineer before disqualifying the welder.
5.4.4.2 Evaluation by Progressive Examination
--...-----....-
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.----._--_._-_
.
---_.~--_._--~--.,.,-_
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....
~ond method of ~oduction evaluation relates to theJrandom radiographic examination and progressive examination described in para. 341.3.4 of ASME 831.3 and modified hereunder, that is;
(1)
When the random radiographic examination reveals a defect requiring repair, two additional joints made by the same welder shall be radiographic examined.
(2)
If the second group examined is acceptable, all items represented by these additional examinations shall be accepted and the welder shall be acceptable.
(3)
For each of the second group of items which reveals~ requiring repair, two additional joints shall be radiographically examined.
....
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CHIYDDA CDRPDRATION SPECIFICATION
5.5
SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 22 OF 31
(4)
If all of the third group of items examined are acceptable, the items requiring repair shall be repaired and all items represented by the examined items shall be accepted. And the welder shall be acceptable.
(5)
If any of the third group of items examined reveal requiring repair, all production welds made by the in 2 weeks shall be 100% radio raphically examined repaired. ~welder shall be deemed unacceptable disqualified.
defects same welder and and
Training and Regualification Test for Unacceptable Welder
_-..-----.
--~--------------------_._----_._- ~~ ..
({)
'-'-
If a welderl~ evalu~tion indicates unacceptable performance, he shall cease production welding. The welder shall be given further training to improve his performance by Sub-contractor. He may be downgraded from butt welding to fillet welding at the option of Sub-contractor.
-'j
~---------._-------------------'
~requalification test shall be carried out for a welder who ..,J completed acprogr~mme o!jtraining established by Sub-contractor and submitted to CHIYODA/COMPANY's welding engineer for approval. ~ ~elder who passed the requalification test, shall be carefully checked and evaluated according to this welder control procedure.
6.
0.
DOCUMENT CONTROL The documents mentioned in this specification shall be prepared and kept in accordance with the~thod~ shown in Table 2. ~ CHIYODA/COMPANY's welding engineer and inspector shall have the right to check the document control and filing system of Sub-contractor at any time as necessary.
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CHIYODA CORPORATION SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 23 OF 31
SPECIFICATION
Table 2 Preparation and .Custody of Document
CUSTODY KIND OF DOCUMENT
(/)
PREPARATION SUBCONTRACTOR
CHIYODA'S QC GROUP
1. MANUFACTURER'S RECORD OF WELDER OR WELDING OPERATOR QUALIFICATION TESTS (Attachment-3)
SUB-CONTRACTOR
ORIGINAL
COpy
2. WELDER'S PERSONAL RECORD (Attachment-4)
SUB-CONTRACTOR
ORIGINAL
COpy
3. DAILY WELDING REPORT (Attachment-6)
SUB-CONTRACTOR
ORIGINAL
COpy
4. ISOMETRIC DWG· OR SPOOL DWG (Attachment-7)
SUB-CONTRACTOR
ORIGINAL
COpy
5. RADIOGRAPHIC EXAMINATION REPORT (Attachment-8)
SUB-CONTRACTOR
ORIGINAL
COpy
6. RADIOGRAPHIC EXAMINATION REPORT (EVERY 2 WEEKS) (Attachment-9)
SUB-CONTRACTOR
ORIGINAL
COpy
7. WELDER CONTROL SHEET BY RADIOGRAPHIC EXAMINATION (EVERY 2 WEEKS) (Attachment.10)
SUB-CONTRACTOR
ORIGINAL
COpy
8. RADIOGRAPHIC EXAMINATION REPORT (MONTHLY) (Attachment-11 )
SUB-CONTRACTOR
ORIGINAL
COpy
7.
CONTROL OF WELDING CONSUMABLE MATERIALS
7.1
Responsibility of Sub-contractor ( 1)
(2)
(3)
Sub-contractor shall~whOllY responsible for the control of welding materials to be used. Sub-contractor shall submit the "Control Procedure of Welding Materials" to CHIYODA and obtain CHIYODA's approval before starting~~welding work ..
"cont~~ced.~~_~.!. __~~.~~.~~~.lC~'
. .!.:-.to
be es tab 1i shed to~event use of inconnect welding consuma?_~ and to provide ~--........
-....
_-_._--~.
'T CHIYDOA
COHPORlnO.
SPECIFICATION
SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO.
24
OF
31
~~--------------------...
welders with welding consumables in good condition in order to make sound welds.
I
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--------- --------~---------------,j
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(4)
) (5)
(
§I
"Contro 1 Procedure of We 1ding ~um~b 1 sha 11 conta i n the organization, 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 this specification. (Attachment-12, -13, -14 & -15) Sub-contractor shall assign sufficient numbers of welding (~nsumab<§ contro llers in charge.
(1)
(6)
Sub-contractor shall establish the weldingCconsumab~~control room. (Attachment-I3)
o
(7)
Sub-contractor shall prepare the drying ovens ovens. (Attachment-13)
and~~
(8)
Sub-contractor shall provide each welder with the portable ------~ ~ated dryer. (quiv~
o
(9)
Sub-contractor shall maintain and control the flow of welding (~~as shown on "Flow Chart for a Typical Consumable Control Procedure". (Attachment-12)
o
(10)
o
(11) ~ecauti~shall be taken care for:
Sub-contractor shall issue and fulfil IIwelding~~' Request Card" as shown on Attachment-14.
~
(a)
Storing
welding(~s~mabl~shall be stored indoors free from
--
.,/
' " CHlYODA CORPORATIOI SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 25 OF 31
SPECIFICATION
moisture. The package of welding~shall not be opened until just before use. ~packages of welding(c-o-~-s-~-m-ab-l-e-~hall not be stored directly on the ground. (b)
Drying Prior to issuing LOW HYDROGEN TYPE ELECTRODES for carbon steels and LIME-TITANIA TYPE ELECTRODES for austenitic stainless steels, they shall be dried to reduce the '~~wh;ch is contained in the flux coating in accordance with Attachment-15 "DRYING CONDITION OF ELECTRODES II
•
Instructions from welding consumable suppliers shall be followed.
o
(e)
~d5) After drYing,~types~electrodesmentioned above shall 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.
(d)
Re-drying Re-drying of~typeS of electrodes mentioned in para. 7.1(11)(b) shall(not be more thar0once.
o
~
(e)
Quantity control of welding materials Only the welding materials required for one day use shall be issued and any remaining materials unused shall be
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'T CHIYODA CllHPDHAnD~ SPEC NO. 010/00/00/CS/TS/OO/007
SPECIFICATION
return~ and
PAGE NO.
stored at the
26
OF
31
~~~~~_~_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. ~
7.2
7.3
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 its facilities, 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 shall have 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.
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 and separately with labels or markings so that they can be identified easily to avoid mixing. Welding electrodes and rods may be stored in the welding
Cc~mab1~contro L"!~~.~: __~: \i~~t.00--=.~~~.~ge .~?nd i t ~ ons (/)
~a~hiYOda
~a~tion is taken~
can shall approve this arrangement before - )
--------~~--------
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CHIYDDA CDRPDRAnOI SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 27 OF 31
SPECIFICATION
(2)
Storage Conditions Same conditions as mentioned in para. 7.1(11)(a) shall be considered.
o
7.4
Drying and Issuing of Welding Consumables~ (1)
Request of (a)
Welding~SUmableiO
When request i ng we 1ding ~mab~ the superv i sor or welding 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 each welder, 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 than mild carbon steel (ex. Low Temp.~ STAINLESS STEEL, HIGH Ni ALLOY, Cu-Ni), the supervisor or welding foreman shall ask their welding engineer or CHIYODA welding engineer and shall confirm the correct type of welding
~!ble~ (c)
(2)
Welders shall not request the weldingC£9~i~~~bl~0directly from the welding~s~mabJiWcontroller.
Upon receipt of the "welding~ Request Card", the welding material controller shall prepare for issuing on the next day as follows:
•
-
_...._ • •_
.0 _ _
. . ~~
'Y CHIYODA
CORPORAnO.
SPECIFICATION
(a)
(I)
- SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 28 OF 31
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 to CHIYODA welding engineer or welding supervisor every week for CHIYODA's checking.
--
(3)
(1)
(/)
Delivery from Welding~Control Room; (a)
A portable(:lectrode dryer qu~shall be provided to each welder, storage of his welding electrodes.
(b)
On delivery, only supervisors or welding foremen shall receive the welding~~s~~abl~in order to avoid any confusion in the welding~ns~~~control room.
(c)
Supervisors or welding foremen shall come to the welding ~control room to receive the portable dryers for each welder under his supervision.
(d) Maximum delivery amount of electrodes for one time is normally limited 5 kg per each portable dryer.
, --------_/
~
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•. . -_ _ •
J'
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(e)
Electrodes which have been re-dried shall be used within the manufacturers time limit.
(f)
Prior to delivery, the
welding~~~controller shall
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CHIYODA CORPORATION SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 29 OF 31
SPECIFICATION
check the following points: Confirm the contents of the Request Card ll
"Welding~--;~
•
Check the quantity and brand name against the request card. 7.5
<1)
l~?)>'Contro1 Room Return of We 1di ngceonsumab <
)
(1)
«)
Supervisors or welding foremen shall gather the portable dryers of their welders and return toSthe designated place eGO: the:J welding~n~~abl~control room after finishing work at the end of 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~~am When electrodes unused on that day remain in the portable dryer, the welding consumable controller shall take out the remai~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, he shall establish the quality control system and shall prepare the quality control procedure and its supporting procedure or instruction documents which shall also be subject to approval by CHIYODA/ COMPANY before commencement of work.
T' CUIYODA
CDRPDRATIOW
SPEC NO. 010/00/00/CS/TS/00/007 PAGE NO. 30 OF 31
SPECIFICATION
CHIYODA/COMPANY shall have the right to monitor and check all the Sub-contractor's quality control activities, documentation and organization at any time throughout the construction stage and to advise, instruct and require the improvement of the quality control system 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: ._.~_.J
-
(a)
o o (0
----
-
L--
The correct material (incl. pipe dia., schedule) is welded in accordance 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 timing in accordance with the approved NDT/PWHT procedure by the qualified personnel without oversight.
@
@"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 RT is followed.
(I)
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@~~jOin!~~ering
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. .-_ ..
.-
, ..._-~._._~.
-",-----
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system on each ISO Dwg. or spool Dwg.
enables traceability\to welder records and inspection results including 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
---/'
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CHIYDDA CORPORlnD~ SPECIFICATION
SPEC 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 have been satisfactorily completed before pressure test.
<;)
------------------------.. steels are protected from zinc contamination by the fabrication yard and tools.
--------
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Attachment-t (1/6) '''-'
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,
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Attachment· 1 OUTLINE OF WELDING PROCEDURE FOR PIPING
,~~
J -~ \
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WELDING TECH. NO.
:1 J
WELD TYPE (1)
f':~ i
WELDING PROCESS (2)
BASE METAL
MATERIAL SPEC
p. NO.
~
FILLER METAL
ROD DIA. (mm)
ARGON GAS FLOW RATE (limin)
ARGON GAS BACK SHIELD
PWHT (3)
pnE HEAT TEMP. MIN.
TEMP. RANGE ("C)
PASS NO.
PROCESS
ASME SPEC NO.
s 19.05
1
GTAW
SFA 5.18
(4) ER70S-X
6
2.0 2.4
6 ,.., 15
2-
SMAW
SFA 5.1
E7016 or E7018
4
2.6 3.2 4.0
-
·
·
.
.
AWS CLASS
F· NO.
(DC)
I
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TM·1
B.W.
I
CS (A106-B API5L·B or eq.)
1
MIN. HOLD TIME (HRS)
THICK RANGE (mm)
,'\
(]) TM·1SR
B.W.
do
1
19.05 25.4
do
do
do
do
do
---
do
do
·
·
625:t20
1
General (Non.sour, 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 is included.
TM·lSR (NAGE)
B.W.
do
1
1
GTAW
SFA 5.18
(4)(5) ER70S-X
6
2.0 2.4
6 ,.., 15
2-
SMAW
SFA 5.1
E7016 or E7018 (5)
4
2.6 3.2 4.0
do
6
I
(',. i:
General (Non-sour, Non·NAGE) service. 19.05 mmT is included.
100)
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REMARKS
<25,4
TM·1HSR (NACE)
B.W.
do
1
25.4 -
do
do
do
T·l
B.W.
do
1
s8.8
All
GTAW
SFA 5.18
do
(4) ER70S-X
.
-
·
625:t20
1
do
do
·
100
625 :t20
1 Hr/in
2.0 2.4
6 - 15
·
-
.
.
Sour (NAGE) services & when PWHT is req'd from process reason.
Sour (NACE) service & when PWHT is req'd from process reason. 25.4 mm Tis included. For 2 NPS & smaller, all GTAW shall be used.
CSTS/OO7ATI
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Attachment-1 (2/6)
j
Attachment-1 OUTLINE OF WELDING PROCEDURE FOR PIPING of
WELDING PROCESS (2)
BASE METAL WELDING TECH. NO.
T-1SR (NACE)
WELD TYPE (1)
B.W.
MATERIAL SPEC
PNO.
THICK RANGE (mm)
PASS NO.
PROCESS
CS (A106-B API5L-B or eq.)
1
s8.8
All
GTAW
FILLER METAL
ASME SPEC NO. SFA 5.18
AWS' CLASS
(4)(5) ER70S-X
F· NO.
6
ROD DIA. (mm) 2.0 2.4
ARGON GAS FLOW RATE (Ilmin)
ARGON GAS BACK SHIELD
6 - 15
.
PRE HEAT TEMP. MIN.
(0C)
.
PWHT (3)
TEMP. RANGE
(0C) 625:t20
MIN. HOLD TIME (HRS) 1
REMARKS
For 2 NPS & smaller, all GTAW shall be used. Sour (NACE) service & when PWHT is required from process reason.
M-l
TML-l :
I
B.W.
B.W.
~
TML-1SR
B.W.
do
AI-killed CS (A333-6 or eq.)
do
1
1
,
s 19.05
S 19.05
19.05 .... 25.4
1
SMAW
SFA 5.1
E60l0
3
2.6 3.2
2 ....
SMAW
SFA 5.1
E7016 or E7018
4
2.6 3.2 4.0
-
1
GTAW
SFA 5.18
(5) ER705·X
6
2.0 2.4
6 - 15
2-
SMAW
SFA 5.1 or (5) SFA 5.5
(5) E7016-X
4
2.6 3.2 4.0
do
do
do
do
do
do
.
-
-
.
-
-
.
.
do
-
.
625:t20
1
For 3 NPS & larger, only when approved by Chiyoda/ COMPANY. (utility service only) Low temp. service & general (Nonsour, Non-NACE) service. 19.05 mmT is included.
Low temp. service
& general (Nonsour, 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 (Nonsour, Non-NACE) service. 25.4 mmT is included.
t•.
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Attachment-1 (3/6)
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Attachment-1 OUTLINE OF WELDING PROCEDURE FOR PIPING
':1 ,I
WELDING TECH. NO.
'j
.~
.
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WELD TYPE (1)
:l; Ji
TML-1SR (NACE)
~
~
"
",1
B,W.
~~
I.
WELDING PROCESS (2)
BASE METAL
'i
i
PNO.
THICK RANGE (mm)
PASS NO.
PROCESS
ASME SPEC NO.
AJ·killed CS (A333-6 or eq.)
1
<25.4
1
GTAW
SFA 5,8
do
1
MATERIAL SPEC
2-
SMAW
SFA 5.1 or (5) SFA 5.5
do
do
do
~5
.\'1 ,~
': ! TML-1HSR (NACE)
,l :!
B.W.
FILLER METAL
25.4 -
AWS CLASS
FNO.
ARGON GAS BACK SHIELD
PRE HEAT TEMP. MIN.
eC)
PWHT (3)
TEMP. RANGE
eC)
MIN. HOLD TIME (HRS)
6 - 15
4
2.6 3.2 4.0
,-
-
-
625=20
1
do
do
do
-
100
625±2O
1 Hr/in
6
(5) E7016-X
& sour (NACE) service.
Low temp. service
& sour (NACE) service. 25.4 mmT is included.
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REMARKS
Low temp. service
2.0 2.4
(5) ER70S-X
do
ROD OrA. (mm)
ARGON GAS FLOW RATE (IImin)
~
TL-l
B,W.
do
1
s8.8
NI
GTAW
SFA 5.18
(5) ER70S-X
6
2.0 2.4
6 - 15
-
-
-
Low temp. service
& 2 NPS smaller, all GTAW shall be used.
i'.~ ~I
TL-l (NACE)
<,;
B.W.
do
1
do
do
do
do
do
do
do
do
-
.
625±2O
1
Low temp. service
& sour (NACE) service & 2 NPS smaller, all GTAW shalf be used.
.]
TM-8(a)
B.W.
?I
SS304L (A312 TP 304L or eq.)
a
<25.4
1& 2
GTAW
SFA 5.9
(6) ER30aL
6
2.0 2.4
6 - 15
3-
SMAW
SFA 5.4
(6) E30aL-16
5
2.6 3.2 4.0
-
AJI
GTAW
SFA 5.9
(6) ER 308L
6
2.0 2.4
6 - 15
"
I, !
T·a(a)
B.W.
SS304L (A312 TP 304L or eq.)
a
s a.a
0
.(7)
-
Yes
-(7)
-
Cryogenic service (~ -196"C)
Cryogenic service (~-196"C) & 2 NPS smaller, all GTAW shall be used.
CSTS/OO7AT1 ',I
Attachrnent-t (4/6) "'-"-
Attachment-1 OUTLINE OF WELDING PROCEDURE FOR PIPING
-'} WELDING PROCESS (2)
BASE METAL WELDING TECH. NO.
WELD TYPE (1)
MATERIAL SPEC
ARGON GAS FLOW RATE (Ilmin)
p. NO.
THICK RANGE (mm)
PASS NO.
PROCESS
ASME SPEC NO.
8
<25.4
1&2
GTAW
SFA 5.9
ER347
6
2.0 2.4
6 .., 15
3-
SMAW
SFA 5.4
E347·16
5
2.6 3.2 4.0
-
I "
FILLER METAL
AWS CLASS
FNO.
ROD DIA. (mm)
ARGON GAS BACK SHIELD
PRE HEAT TEMP. MIN. (DC)
PWHT (3)
TEMP. RANGE (DC)
MIN. HOLD TIME (HRS)
0
-(7)
-
-
~
TM-8(b)
B.W.
:])
:
o .,
I,
..,.
SS321 (A312 TP 321 or eq.)
REMARKS
T-S(b)
B.W.
do
8
sS.S
All
GTAW
SFA 5.9
ER347
6
2.0 2.4
6 .., 15
Yes
-(7)
-
-
For 2 NPS & smaller, all GTAW shall be used.
T-44
B.W.
Hastelloy C-276
44
s3.9
All
GTAW
SFA 5.14
ER NiCrMo -4 or 10
44
2.0 2.4
6 .., 15
Yes
-
.
-
For 2 NPS & smaller, all GTAW shall be used.
T-34
B.W.
9/1 Cu·Ni
34
s6.0
All
GTAW
SFA 5.27
(8) JIS YCuNi-1
34
2.0 2.4
6 .., 15
Yes
.
-
-
For 4 NPS & smaller, all GTAW shall be used.
TMGalvanize
B.W.
Galvanized CS
1
s 19.05
1
GTAW
SFA 5.18
(4) ER70S-X
6
2.0 2.4
6 .., 15
2 -
SMAW
SFA 5.1
E7016 or E7018
4
2.6 3.2 4.0
-
.
T· Galvanize
B.W.
do
1
s 8.8
All
GTAW
SFA 5.18
(4) ER70S-X
6
2.0 2.4
6 - 15
TM·Alumi.
B.W.
Aluminized CS
1
s 19.05
1
GTAW
SFA 5.9
ER309Mo
6
2.0 2.4
6 - 15
2-
SMAW
SFA 5.4
E309Mo-16
5
2.6 3.2 4.0
-
For galvanized pipe.
0
-
-
-
For galvanized pipe & 2 NPS & smaller, all GTAW shall be used. For aluminized pipe
-
-
CSTS/OO7ATI
Attachrnent-t (5/6)
.:»
,;
,
;I
.:.
Attachment- 1 OUTLINE OF WELDING PROCEDURE FOR PIPING
I• •"
.'"
..
WELDING PROCESS (2)
BASE METAL WELDING TECH. NO.
~A
T-Alumi.
J
WELD TYPE (1)
B.W.
MATERIAL SPEC
do
FILLER METAL
PNO.
THICK RANGE (mm)
PASS NO.
PROCESS
ASME SPEC NO.
1
s a.s
All
GTAW
SFA5.9
AWS CLASS
ER309Mo
FNO.
6
ROD DIA. (mm) 2.0 2.4
ARGON GAS FLOW RATE (IImin)
ARGON GAS BACK SHIELD
PRE HEAT TEMP. MIN. ("C)
6 - 15
Yes
.
,
:'"\
PWHT (3)
TEMP. RANGE ("C)
MIN. HOLD TIME (HRS)
.
-
REMARKS
For aluminized pipe & 2 NPS & smaller, all GTAW shall be used.
"l ;~
.~ r,
1 :
~
(()
t»;
CSTS/OO7ATI
~.
,-'
Attachrnent-t (6/6)
Attachrnent-j OUTLINE OF WELDING PROCEDURE FOR PIPING
NOTES:
)
(1)
WELD TYPE
,'r
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 Welding Technique No. with the same preheat and PWHT condition, if required. .;j
(2)
WELDING PROCESS SMAW: Shielded Metal Arc Welding GTAW: Gas Tungsten Arc Welding
(3)
.~
PWHT i)
-:
ii)
I
(4)
For Carbon Steel Material; Heating Rate: Max. 2OQ°C/hr·in (Max. 2000C/hr for 1· Cooling Rate: Max. 200°C/hr·in (Max. 2000C/hr for 1·
above 400°C & below thickness) above 4000C & below thickness)
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.
(5)
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.', E7016-1 These 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.
(6)
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.
ij (7)
fj
Max. Interpass Temp. for SS Welding
rrc.
f',
It shall be max. 1
II
(8)
•
JIS YCuNi·l TCu·9R (Tsuruya Welding Co. Japan) is recommendable.
tv
-s
CSTSIOO7ATl
1
,t
Attachment·2 (1/2)
r
,1
Attac"'-:ent-2 STANDARD OF WELDER PERFORMANCE QUAUFICA._;" TEST
:
!
t
/1 ,
~
:'
WELDER PERFORMANCE OUAlIFICATION TEST NO. (WPOT-NO.)
WELDING TECH. NO. TO BE USED FOR TEST (1)
WPOT·l
TM-1
BASE METAL
MATERIAL SPEC.
P NO.
CS (Al06-B, API5L·B or eq.
1
.,1
'I,
.. 0
",
. ~
REQUIRED TEST
PIPE SIZE (2)
~
TEST POSITION
QUALIFIED RANGE
RT
P, NO.
FNO.
Yes
Yes
1
6+4
VISUAL TEST
6G
(18.2 ~...J
THICKNESS RANGE (MM)
upte
REMARKS PIPE 00 (NPS)
WELDING POSITION
2-1/2 & over
All
CS Piping Welder
~
WPOT-2
T·l
do
1
2" SCH 80 (5.5 t)
6G
Yes
Yes
1
6
up to 11
3/4 & over
All
CS Piping Welder (GTAWfor small dia. pipe)
WPOT-3
M·l
do
1
6" SCH 60 (11.0 t)
6G
Yes
Yes
1
3+4
up to 22
3 & over
All
CS Piping Welder (Root pass by SMAW• E6010)
WPOT-4
TM·8(a) or TM-8(b)
SS (3) (A312·TP304L or A312-TP321)
8
6" SCH 60 (11.0 t)
6G
Yes
Yes
8
6+5
up to 22
2-1/2 over
All
SS Piping Welder
WPOT-5
T-8(a) or T-8(b)
do
8
2" SCH 80 (5.5 t)
6G
Yes
Yes
8
6
up to 11
3/4 & over
All
SS Piping Welder (GTAW for small dia. pipe)
WPOT·6
T-44
(4) Hastelloy C·276
44
2" SCH 40 (3.9 t)
6G
Yes
Yes
44
44
up to 7.8
3/4 & over
All
Hastelloy Piping Welder (GTAW for small dia. pipe)
WPOT·7
T·34
(5) 9/1Cu·Ni
34
2" SCH 40 (3.9 t)
6G
Yes
Yes
34
34
up to 7.8
3/4 & over
All
9/1 Cu·Ni Piping Welder (GTAW for small dia. Pipe)
WPOT-8
(6)
CS Plate
1
9 ..... 25 t (Plate)
2G & 3G
Yes
Yes
1
4&
up to 2 t
-
lG,2G, 3G
Structural Welder for Groove Weld
6"'" 12 t (Plate)
3F, 4F
All
-
Ail
Structural Welder for Fillet Weld
6 ..... 12 t (Plate)
3F, 4F
All
.
All
Structural Welder for Fillet Weld
.o,
r
'j
'~ "
j
.~
;
~
o
WPOT·9
WPOT-l0
(6)
(8)
CS Plale
do
1
1
under Yes
(7)
1
!4&\ \. under I
Yes
(7)
1
2 &1
CSTSIOO7AT2
.~
Attachment·2 (2/2) Attac;....,.Jnt.2 STANDARD OF WELDER PERFORMANCE QUALIFICA.
Note:
J TEST
(1)
Refer to Attachment-f.
(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.
(8)
AWS E6013 or equivalent shall be used.
,( '~~ \
, '.!
.;
CSTSIOO7AT2
Cv
'0
Mc:::!s T80984 ATTACHMENT-3
FORM Z·I 984 E
MANUFACTURER'S RECORD OF WELDER OR WELDING OPERATOR QUALIF1CATION TESTS
Stamp No.
Welder Name Welding Procedure Specification No. Welding Process Type Backing
Gas Type Percent Composition Weld Progression Other
Material Specifica tion P No. Diameter Thickness Filler Metal Specification No. Class No. Other Position . Electrical Characteristics Current AC or DC Polarity
to to P No.
FOR INFORMATION ONLY Filler Metal, Diameter and Trade Name
F No. Submarged Arc flux Trade Name Gas Metal Arc Welding Shield Gas Trade Name
GUIDED BEND TEST RESULTS Type and Figure No.
Result
I RADIOGRAPHIC TEST RESULTS FOR 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-Fusion Appearance-Fillet Size(1eg)
% X
Convexity
or Concavity
CERTIFICATE OF COMPLIANCE Test Conducted by
Laboratory Test No.
We certify that the statements in this record arc correct and that preparation, welding and testing of the test welds conform to the requirements of the project specification
Date
Organization By
(Detail of record of tests are illustrative only and may be modified to conform to the type and number of tests required by the project specification.)
I II
Attachment-4
WElDER'S PERSONAL RECORD
WELDER's Name :
Stamp No. : His Figure 1. Date of Birth 2. Nationality 3. Address
Photo
5 cm x 5 cm
4. Physical feature Height: Weight: etc.
Arrival Date : Departure Date :
Qualification Type of Qualification Date Process
F-No.
Position
Thickness Range
Pipe Dia. of Size
Disqualified Date
QCPCOO5/ATI4(SPEC) .~4
-
_~:.'.'
.....
~t
s.: .~.~.:'." -._-.'
Attachment - 5
WELDER'S IDENTIFICATION LABEL
8CM
)
STAMP N O . - - - - - - PROCESS
F - NO. POSITION
Color of Label: White, Pink, Blue, Yellow, Red
)
_1 ...•
--~:
. .-"'::.......-. ,,"-- ........ '1:':-.-_...- .....
.
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r :...
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~v CHIYODA C08POPJnOI
ATTACHMENT-6 DAILY PREFAB WELDING REPORT
'WELD DATE Y
D\VG NO.
MADE BY
, AREA CODE
GRP CODE
M M D D
Y
JOINT NO.
-
~
-
~
-
i>
~
~
-
-
~
J
~ ~
Il'"
~
t
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r-
PIPE SIZE
~
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, \, ~, ~
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-
\VELDER NO.
~o
:::!-
0<
CHECKED BY
ROOT
COVER
~I
\
~\
B
i
I
B
i Ci
I
B;' C
I
B, C i F
I
I I
I :"
I
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I
I
I
I
I
I
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-!
II
i
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I
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I
I
B
C
I I
B
C
B
C :' F
!
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Bi
ct v
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F
-
I
-S/C/F
-
I
Bi C / F
-
I
BI
I
B/ C/ F
I
B/ C
-
-
I
-
J
I
-
-
-
'1
(2) \Veld Type
,
= Carbon Steel, 2 =Alloy SteelJ = Stainless Steel. 4 = Others B = Girth Butt \\'cld. C = Branch Connection \Veld. F = Fillet \\'dd I
Category
I = Critical. hazardous service. 2 = General refinery service, 3 = Utility service
Rework
Enter
(3) Construction:
. _ : _.
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ATTACHMENT-7
f ••
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Attachment-s
RADIOGRAPHIC EXAMINATION REPORT
Client
QATAR LIQUEFIED GAS COMPANY LTD.
Project Title
QGL
Name of Equipment and Identification No.
Mark of Film
Inspector
Material
&
Defect
Judgement
Date
Remarks
Thickness
Chiyoda
COMPANY
#
-
r.
Signature: CHIYODA
Signature: COMPANY
Date
_
Date
Signature: SUBCONTRACTOR
_
Date
OCPCOOS/ATT8(SPEC)
'.-
.....
"";
.
~-,
. -',
-'-'
Attachment-9
RADIOGRAPHIC EXAMINATION REPORT (EVERY 2 WEEKS)
REPORT NO. SUBCONTRACTOR PERIOD
Number of Film
Number of Joint
Accepted
Acceptance Ratio (%)
Rejected
Remarks
This Period
-Accumu.
Substance of Defect Kind of Defect
P
C
LF
SL
IP
UC
CRP
ERP
No. of Film Accumu.
o
n
Remarks
Total
No. of film
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)
Attachment-10
WELDER'S CONTROL SHEET BY RADIOGRAPHIC EXAMINATION (EVERY 2 WEEKS)
SUB-CONTRACTOR
Welder's Name & Stamp No.
I
PERIOD
Number of Joint
Number of Joint
Accept
Acceptance Ratio (%)
Reject
Remarks
Accumu.
Kind of Defect
P
C
SL
LF
IP
UC
CRP
ERP
Other ( )
Total
No. of Rim
( ~
Accumu.
.
Welder's Name & Stamp No.
I
..
Number of Joint
Number of Joint
Accept
Acceptance Ratio (%)
Reject
Remarks
Accumu.
Kind of Defect
C
P
SL
LF
IP
UC
CRP
ERP
Other ( )
Total
No. of Film Accumu. Welder's Name & Stamp No.
I
Number of Joint
Number of Joint
Accept
Acceptance Ratio (%)
Reject
Remarks
,
Accumu.
Kind of Defect
C
P
SL
LF
IP
UC
CRP
ERP
Other ( )
Total'-'
No. of Rim Accumu. Number of Joint
Welder's Name & Stamp No.
I
Number of Joint
Accept
Acceptance Ratio (%)
Reject
Remarks
Accumu.
Kind of Defect
C
P
SL
LF
IP
UC
CRP
ERP
Other ( )
. .
Total
No. of Film Accumu.
aCPCOO5/ATT10(SPEC)
Attachrnent-t t
RADIOGRAPHIC EXAMINATION REPORT (MONTHLY)
CLIENT
REPORT NO.
PROJECT TITLE
DATE
PERIOD
FROM
Area
&
SUBCONTRACTOR
Welder Stamp No.
TO
Total Film Sheet Period
Accum
Acceptable Film Sheet Period
Accum
Repair Film Sheet Period
Accum
Acceptance Ratio
(%) Period
Accum
t. .
(
TOTAL
Signature:
Signature:
CHIYODA WELDING ENG'R
SUBCONTRACTOR WELDING ENG'R
OCPCOOS/ATT11 (SPEC)
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Quaranti ne
Consumable CR Delivery
l>C) 2-
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Consumable Transfer
Storage
I I DRYING INSTRUCTION I
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Chemical Analysis
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Quality
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Control
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IFabrication Records
Fabrication ~
1-3 1-3
Indicates Record Required
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FLOW CHART FOR A TYPICAL CONSUMABLE CONTROL PROCEDURE
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System Audit
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Un used Manua I Consumables
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Attachment-13
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Sample of Welding Material Control Room and Facilities
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on the table
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drying oven 50 kg
NOTE: .
keeping oven 50 kg 50 kg 50 kg
Given conditions: numbers of welder ... 50 quantity of electrodes to be used in one day . .. 300kg type of electrodes E 7018, E 8016-82, E 502 E 308
door
, >,
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potable dryer placing area (on the floor)
1
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7 m
keeping oven 50 kg
01
02
03
04
05
06
07
08
09
10
keeping oven 50 kg
11
12
..
..
'00
marking of welder's stamp number on the floor Type and usage of drying and keeping ovens Drying ovens
keeping oven 100 kg
I
350°C 60 min.
drying oven 100 kg
capacity : electrode:
48 measuring place of weight of welding materials
~
50 kg E 308
keeping (warming) ovens 49
50 door
reception counter of "WELDING MATERIAL REQUEST CARD
144m
100 kg E 7018 E 8016-82 E 502
~00C I 2 cycles in a day 60 min.
1100-140°cl~~1 capacity: electrode:
100 kg E 7018
do.
I~~
50 kg 50 kg 50 kg 50 kg E 7018 E 7018 E 8016-82 E 308 E 502
II
50 kg SPARE
.1 (
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QCPC005!ATT13(SPEC)
Attachrnent-14
SAMPLE OF wWELDING MATERIAL REQUEST CARD
W
(/)
WELDING MATERIAL REQUEST CARD
DATE OF DELIVERY YEAR
I I I I I I I
Month
BRAND NAME OF MATERIAL
I I I I I I I
STAMP NO. OF WELDER Date
CATCH)
DIAMETER
REQUESTED QUANTITY
NO.
I
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Signature
kg
rom
kg
rom
kg
rom
kg
MATERIAL CONTROLLER
WELDING FOREMAN Date
rom
Date
iI
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:
Signature
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(WORKING AREA
QCPC005/ATT14(SPEC) ~/ - ..
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Attachment-IS DRYING CONDITION OF ELECTRODES
BASE METAL
FILLER METAL (AWS CLASS)
TYPE OF COATED FLUX
DRYING & RE-DRYING CONDITION TEMP.
(OC)
HOLDING TIME (HRS)
KEEPING CONDITION TEMP.
(Oc)
Carbon Steel (incl. Low Temp. CS)
E7016 E7018 E7016-G E7016-1 E7018-1
Low Hydrogen
300 ... 400
1
100 ... 150
Austenitic Stainless Steel
E308L-16 E347-16 E309 Mo-16
Line Titania
150 ... 250
1
100 ... 150
Hastelloy
E NiCrMo-4
Line Titania
150 ... 200
1
100 ... 150
E CuNi
Line
150 ... 200
1
100 ... 150
C-276 9/1 Cu-Ni
Note:
The drying & keeping condition listed herein is general instruction only. Thus, Subcontractor shall follow to consumable material supplier's instruction officially, when any conflict happens.
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QCPC005/ATT15(SPEC)
Attachment-16 ,;,1
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Work/Control Flow for Postweld Heat Treatment PWHT SUBCONTRACTOR
PIPING SUBCONTRACTOR OC INSPECTOR
'if
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ACTION BEFORE PWHT
Confirm weld completion and necessary inspection before PWHT
COMPANY
CHIYODA OC INSPECTOR Check/approve "Application for PWHT"
1) C. Steel weld Visual Inspection Originate "Application for PWHT" Identification marking on actual welds with Color Tag "Green" DURING PWHT BY PWHTCREW
• Check preparation of PWHT (Thermocouple, heating and insulation pad location, and weather protection, etc.)
Monitor PWHT operation
· Check PWHT condition against the requirements
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ACTION AFTER PWHT
• Check PWHT Chart
Check PWHT Chart and Hardness Record
. Review PWHT Chart and Hardness
· Perform Hardness Test
~~
Release for final NOT after PWHT
;.\
• Submit PWHT Chart and Hardness Record
1
DOCUMENTS "
"APPLICATION FOR PWHT"
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[> Perform PWHT
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"PWHT CHARTI HARDNESS TEST RECORD"
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one copy
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one copy
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LEGEND:
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REVIEW
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RETENTION
QCPC005/ATT16(SPEC)
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Attachment-17
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Work/Control Flow for RT
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PIPING SUBCONTRACTOR OCINSPECTOR
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ACTION
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RT SUBCONTRACTOR
Confirm weld completion and necessary inspection before RT
Confirm location/marking and perform RT
Originate "Daily Request for Radiography"
Prepare RT Record with initial interpretation
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Check/approve "Daily Request for RTM,
COMPANY
. Review films and RT record.
Review films/RT record with final interpretation, Check record of RT result on welding inspection check sheet with piping Subcon.
Identification marking on actual welds with Color Tag "Yellow"
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CHIYODA OCINSPECTOR
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Receive RT Record copy and record the results on welding inspection check sheet of each OC ISO Dwg.
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Request RT Subcon to perform RT,
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In case of repair, identification marking on the weld with Color Tag "Red"
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DOCUMENTS
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a) Daily Req't for RT
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C> Perform RT
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b) RT record with film
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one copy
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one copy
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LEGEND:
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REVIEW
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= RETENTION,
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QCPC005/ATT17(SPEC)
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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.
Min Number of RT to be taken
1 - 14
1
15 - 24
2
25 -
34
3
35 - 44
4
*Total joint numbers means total number of girth butt welds. 10% RT for prefab-shop-welds shall be 10% of total prefabshop-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)
· ..
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Attachment-18 (2/2)
(a)
Do not always select the easy welding (position) such as pipe to flange joint, include difficult welding (po s 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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OVERAll WORK flOW fOR CQNTBa..OF WELDERS
CHART-'
CHART-'
'\
WORKFLOW
Acceptable welder
1;1 I, :
New
,i I:-.'" ~.
Qualification of welders
./
----~
Registration of Qualified welders with Stamp No.
- ---~
Trial execution of welding at first stage
-- --~
,., Initial evaluation of welder's performance by Radiographic Examination
r-------------------------,
Acceptable -., welder
--
V
Execution
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of welding
of welder's performance by Radiographic Examination ( in every 2 weeks)
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Periodical evaluation
first 3 production welds Not less than 50/ 0 of each welder's production welds
Acceptance criteria of each welder's performance
Acceptance criteria' of each welder's performance See CHART - 2 I
See CHART - 3
v
v Unacceptable
/welder~
-'
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CONmOL DOCUMENT
Performance Oualihcalion Record (Allachment-3) :.J
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Welder's Identification Label Welder's Personal Record
"
(Allachment-4,S)
Daily Welding Report Recording of each welder's production welds on Piping
Dwg.
Radiographic Examination Report (AUachmenl-6)
Daily Welding Report Recording of each welder's production welds on Piping Dwg.
Radiographic Examination Report, Radiographic Examination Report (Every 2 weeks), Welder's Conlrol Sheet by Radiographic Examination (Every 2 weeks), Radiographic Examination Report (Monthly) (Allachment·6,7,8 & 9)
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CHART·2 INITIAL EVALUATION OF WELDER'S PERFORMANCE
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BY RADIOGRAPHIC EXAMINATION
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First 3 production welds of each newly qualified welder shall be radiographic examined regardless of material service class.
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2. RT of 2 additional joints
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3. Result of RT
, 4. Judgement of welder's performance
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Acceptable
Acceptable
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Note:
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not required (stop welding)
not required (stop welding)
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Unacceptable (Disqualify)
Unacceptable (Disqualify)
It Unacceptable (Disqualify)
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Case 4
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Case 3
Case 2
Case 1
1. Result of RT
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1.
2.
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Accepted by RT,
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Unacceptable (Disqualify)
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Rejected by RT
Acceptance criteria of Radiographic Examination shall be in accordance with Table 341.3.2A of ASME B31.3.
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aCPCOO5/CHART2(SPEC)
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CHART-3
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CHART-3 PERIODICAL EVALUATION OF WELDER'S PERFORMANCE BY RADIOGRAPHIC EXAMINATION ~i:
Extent of Radiographic Examination shall be in accordance with the requirements of the job specifications. In principle, the welds to be examined shall be selected to ensure that not less than 5% of production welds of each Individual welder are included. •
f~
Random radiographic examination (not less than 5%) and the progressive examination (see para. 341.3.4 of ASME 831.3)
1. Extent and Type of RT
,
I
2. Result of RT
(I)
Original
: I I
Case 1
:
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Progress Examination
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Second Group RT of 2 additional joints
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3. Judgement of welder's performance
Third Group RT of 2 additional joints per each rejected item
Acceptance ratio of R.T. film in every 2 weeks
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Case 2
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Regardless of extent and type of radiographic examination
10
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Acceptable
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C!:90%
<80%
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: When any of the third groups are : rejected by RT
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Acceptable
80-90%
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When all of the third groups are accepted by RT
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Acceptable
Unacceptable (Disqualify)
Acceptable
Acceptable with Warning Letter
Unacceptable (Disqualify)
i
i
Note:
0:
1. 2.
Accepted by RT,
®:
Rejected by RT
Acceptance criteria of Radiographic Examination shall be in accordance with Table 341.3.2A of ASME 831.3 . .,....-,
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aCPCOO5/CHART3(SPEC)
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