ML20073B243

Requests Approval to Use Repair Methodology in ASME Code,Section XI,1989 Edition,1990 Addenda,Article IWA-4000 as Alternative to Present ISI Program Code Requirements to Complete Repairs of CP CH-P-1B Support Attachment Welds

ML20073B243
Person / Time
Site:	Beaver Valley
Issue date:	09/13/1994
From:	George Thomas DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9409210248
Download: ML20073B243 (24)

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Beaver Valley Power Station Shippingport, PA 15077-0004 (411) 393-5206 (412) 643-8069 FAX GEORGE S. THOMAS Dmsson Wce Pres # dent IuY.'r Yo'.5'r omsion september 13, 1994 U.

S.

Nuclear Regulatory Commission Attn:

Document Control Desk Washington, DC 20555

Subject:

Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 10 CFR 50.55a(a) (3) Relief Request; Weld Repair The purpose of this submittal is to request.NRC approval of a relief

request, pursuant to 10 CFR 50.55a(a) (3), to utilize a later version of the ASME Boiler and Pressure Vessel Code to complete repairs on the Unit No. 1 charging /high head safety injection pump (CH-P-1B).

It is requested that the repair methodology in the ASME

Code,Section XI, 1989 Edition, 1990 Addenda, Article IWA-4000, be approved as an alternative to the present Inservice Inspection (ISI).

Program code requirements which are based on the 1983 Edition, 1983 Summer Addenda.

There are three charging /high head safety injection pumps, two of which are required by technical specifications to be operable during plant operation.

The technical specification requirements are currently being met with the "A" and "C" pumps operable.

However, the "B"

pump is inoperable due to code unacceptable indications identified in the casing pedestal support attachment weld to the pump.

As such, if the "A" or "C" charging pump became inoperable and cculd not be restored to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, a technical specification required plant shutdown would occur since the "B" pump is u'iavailable until repairs can be completed.

Enclosure 1

describes in greater detail the circumstances surrounding this

repair, including an evaluation of options.

Approval of the request will permit use of an acceptable alternative material-for weld qualification.

The 1989 Edition, 1990 Addenda of the ASME

Code,Section XI, Article IWA-4000, provides for an alternative to weld qualification which will maintain an acceptable level of quality and safety in weld repairs.

It is requested that the NRC provide provisional relief in order that the pump repairs may be expedited.

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9409210248 940913 PDR ADOCK 05000334

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10 CFR 50.55a(a) (3) Relief Request; Weld Repair j

,Page 2 i'.!

If you have any questions regarding this request, please contact Mr. Nelson R. Tonet,-Manager, Nuclear Safety at (412) 393-5210.

[

Sincerely,

'G orge S. Thomas cc:

Mr.

L. W. Rossbach, Sr. Resident Inspector Mr. T. T. Martin, NRC Region I Administrator Mr.

G.

E.

Edison, Sr. Project Manager

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TABLE OF CONTENTS f :

REPAIR OF CIIARGING PUMP, CII-P-1B SUPPORT ATTACIIMENT WELDS i

, Attachments:

1

1. NDE Examination Report MT94-20

2. Drawing A-60398; Case Foot - Discharge End

3. Drawing A-60399; Case Foot - Suction End

4. NDE Examination Report MT94-22 (3 pages)

5. Procedure Qualification Record 466 (5 pages)

6. Welding Procedure Specification, Number 1-IIBT-1 (4 pages)

4 ENCLOSURE 1 REPAIR OF CIIARGING PUMP. CII-P-1B SUPPORT ATTACIIMENT WELDS

==

Introduction:==

On August 16,1994, charging /high head safety injection pump CH-P-1B casing pedestal attachment welds were inspected and the results recorded on NDE Examination Report MT94-20 (Attachment 1). The U-shaped casing support feet are detailed on Drawings A-60398 and A-60399 (Attachments 2 and 3). As can be seen from the support detail drawing, the area of the indications is at the juncture of the fillet weld along the side of the U and the partial penetration weld with a 30 weld preparation along the bottom of the U. The indications noted (slag pockets and lack of fusion) were investigated and removed by grinding. The extent of excavation on the three attachment welds requiring repair is detailed in NDE Examination Report MT94-22 (Attachment 4). As documented on NDE Report, MT94-22, some of the indications required metal removal to the root of the partial penetration weld, near the bottom edge of the U, with the area of excavation tapering to the surface of the fillet weld running along the side of the U-shaped support bracket.

Renair Ootion Evaluation As the indication removal process proceeded, the repair options were being evaluated. Article IWA-4000 of ASME Section XI 1983 S83 was consulted to develop a repair methodology. As described in paragraph IWA-4120 (a), " Repairs shall be perfonned in accordance with the Owner's Design Specification and the original Construction Code of the component or system. Later Editions and Addenda of the Construction Code or of Section 111, either in their entirety or portion thereof, and Code Cases may be used. If repair welding cannot be perfonned with these requirements, the applicable alternative requirements ofIWA-4500... may be used:

... ". Repairs in accordance with the original design would require a full post weld heat treatment which is not desirable in this case due to the concern for the maintenance of the as-machined dimensions and tolerances of the pump casing. Therefore, the use of a temper bead technique which does not require a post weld heat treatment would be desirable. ASME Section III was reviewed for an applicable temper bead technique.

The technique specified in paragraph NB-4622.9 was found to be non-applicable due to paragraph NB-4622.9(b), which limits the depth of the repair to not greater than one-third the base material thickness. The depth of the repair areas indicated on NDE Report MT94-22 for the support attachment weld exceeds one-third of the support thickness. As a result, the temper bead technique described in ASME Section XI would be recommended since there is not a limiting requirement for depth of repair.

v

Repairs performed to ASME Section XI are required to be performed to the year and addenda of Section XI specified in the inservice inspection program applicable to the inspection interval in accordance with the requirements of IWA-4500. At Beaver Valley, the code of record is the 1983 Edition with the Summer 1983 Addenda.

Compliance to the 1983 S83 Section XI Code creates a situation which the repair process would be delayed until a piece of A266 Class I material with heat treatment equivalent to the original design requirements can be procured. In order to avoid unnecessary delays in the repair process and schedule, later editions of the ASME Section XI Code were reviewed to see if relief from this material specification requirement was incorporated into the later editions. In the 1990 Addenda to the 1989 Edition of the ASME Section XI Code, the material specification requirements for the qualification of the repair welding procedure were modified to only require materials from the same P-number and Group number with heat treatment equivalent to the original heat treatment rather than a material of the same specification type, grade ani class. The material to meet the requirements of the later edition of the code was readily available and a welding procedure was qualified to the 1989 Edition Addenda 1990 of ASME Section XI. The Procedure Qualification Record (PQR) and the Welding Procedure Specification (WPS) are included as Attachments 5 and 6, respectively.

Evaluation of Code Year Editions The following is a brief description of the changes between the code of record for Beaver Valley,1983 S83, and the code year and addenda desired for use in the repair process,1989 A90. In order to evaluate the requirements of each code year and addenda, a paragraph by paragraph review of the applicable paragraphs was performed since the 1990 Addenda to the Code included a complete rewrite of the repair by welding section moving and consolidating many of the requirements from the IWB, IWC and IWD sub-sections to the IWA sub-section of the 1990 Addenda Edition.

1983 S83 Requirements 1989 A90 Requirement IWA-4120: Specification of applicable IWA-4120: Requirements are equivalent Code Year and Addenda with additional guidance allowing the use of the latest approved (10 CFR 50.55a(b))

Edition of Section XI 2

i l

IWA-4130: Description of the Repair IWA-4130: Addresses all the requirements Program requirements under which the of the earlier addition and provides Utility performs repair activities, additional detail on what items are to be included in the Utility Repair Program.

The repair plan for the pump repair would address all the items identified in IWA-4130.

IWA-4140: Requirements for the Unchanged services of an Authorized Inspection Agency.

IWA-4200: Material shall conform to the Unchanged requirements of either the original Design Specification or Section III.

IWA-4300(a): Welding Procedure IWA-4400(a) Unchanged Specification qualification IWA-4300(b): Welder qualification IWA-4400(b) Wording revised with the intent onchanged.

IWA-4300(c): Welder employment IWA-4400(c) Unchanged organization requirements IWA-4400: Pressure Test requirements IWA-4700: Requirements unchanged, but following repair reference to testing following repairs in accordance with IWB were removed since repair procedures are now included in IWA IWA-4500: Examination of the repaired IWA-4600: ' Unchanged area 3

1 IWA-4700: Records IWA-4800: Unchanged IWB-4320: Repair welding by half bead IWA-4510: Requirements unchanged welding technique IWB-4321: General requirements for IWA-4513.1(a) addresses sub-part (a);

welding. Sub-parts a, b, c, d and e will IWA-4513.1(b) and (c) address sub-part be addressed separately since the later (b) eliminating some specific temperature edition moved the requirements to several references with a requirement to use locations, manufacturer's recommendations for electrode pre-heat and moisture control.

IWA-4210 addresses sub-part (c) in a more general manner.

Sub-part (d) concerning electrode selection for tensile strength greater than the base metal has been removed.

Sub-part (e) concerning peening is unchanged in intent.

IWB-4322: Welding qualification IWA-4500(c): References have changed, but intent unchanged.

IWB-4322.1(a): Specifies the material IWA-4500(c)(1): Changes the material requirements for the procedure requirements from the same specification qualification testing.

type, grade and class to the same P-number and Group Number. Post-weld heat treatment remain unchanged.

IWB-4322.1(b) through (h): Test IWA-4513 Figure IWA-4513-1 specifies assembly dimensional requirements and the plate size and groove design to be configuration to simulate the restraint tested along with locations for all test that the weld metal will experience in the specimens. The figure eliminates the repair section of the component.

requirements for configuration specific test assemblies and replaces it with a standardized groove in plate design test plate.

4

F IWB-4322.1(i): Welding material testing Material property testing of each lot of requirements welding material was removed from the 1989 A90 Edition of the Code.

lWB-4322.1(j): Identifies testing type IWA-4513: Figure IWA-4513-1 specifies and location for test specimens to be the plate size and groove design to be taken from the qualification plate at the tested along with locations for all test maximum practical depth of repair.

specimens. The new requirements are more specific.

IWB-4322.l(k): Impact testing IWA-4512: Impact testing requirements requirements for procedure qualification have been completely rewritten, are detailed in several sub-paragraphs.

eliminating specific requirements in the earlier edition of the Code replacing the requirements with Charpy V-notch testing in accordance with the ASME Section II SA-370, Specification for Mechanical Testing of Steel Products.

IWB-4322.2: Performance qualification IWA-4400(b): Addresses this requirement of the welder generically through the requirements of the Utility Repair Program and IWA-4120. The changes drops the specific reference to performance qualification in areas of physical obstruction.

IWB-4323(a): Preheat and interpass IWA-4500(d)(2): Eliminates the 30 minute temperature requirements, preheat soak time, but keeps the preheat at IWB-4323(b): Identifies that 350 F. The maximum interpass thermocouples are to be used to monitor temperature is lower to 450*F from preheat and interpass requirements.

500 F. The preheat area is reduced from 3T or a maximum of 10 inches to 1.5T or a maximum of 5 inches. Thermocouple monitoring requirements are unchanged.

5

4 IWB4323(c): Methodology for IWA-4513.1(d): This section is deposition of weld material and electrode unchanged.

size limits for each layer.

IWB-4323(d): Post weld heat treatment IWA-4513.1(e): The time and temperature requirements, requirements are unchanged. The 1990 Addenda removes the 3T band width requirement for post weld heat treatment and notes that the weld area shall be post weld heat treated.

l IWB-4324: Examination requirements for IWA-4513.2: The examination the repair process and post repair requirements are unchanged except for the evaluation.

requirements to examine a 3T band which is now limited to the weld area.

The changes in the code requirements allow for the qualification of a broader set of materials with a single procedure qualification without impacting the quality of the weld deposited. Additionally the later edition of the code makes more use of references to other Sections of the ASME Code, such asSection II for definition of requirements rather than restating many of the requirements in the body of Section XI. The change to heat treatment areas from the minimum 3T band width to only the weld area allows the weld area to receive the required heat treatment while minimizing the potential for dimensional damage through distortion to the remaining component.

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466 Rev.

O Walding Procedure Specification Used for Test:

1-HBT-I Page 1

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Welding Process:

SVAW Type:

Manual JOINTS (QW-402) saa page 3.

BASE METALG (QW-403)

PREHEAT (QW-406)

Material Spec:*

A-36 Preheat Temperature:

3 7 6*F Pype or Grado:

None Maximum Interpass Terp.:

445'T P-No.:

1, Group 1 Other:

Verified by chart recorder.

Thickness of Test Coupon:

2" Diameter of Tent coupon:

N/A Maximum Pass Thickness:

.175" Qual Thk Range:

Unlimited POST WELD HEAT TREATMENT (QW-407)

Backing Materials:

Integral Deposited Thickness:

1.00" Temperature:

500"F + 50 F Time:

2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> PCI # 1616 Other:

Prior to welding, base metal was heat treated at 1120 F for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />.

CAs (QW-408)

Purge Gas:

None Flow Rate: N/A FILLER METALS (CW-404)

Shield Gas:

None Flow Rate: N/A Trailing Gas:

None FICW Rate: N/A Wald Metal Analysis A-No.:

Al Gas Composition:

N/A Filler Metal F-No.:

4 SFA Specification:

5.1 AWS clannification:* E-7018 ELECTRICAL CHARACTERISTICS (CW-409)

Supp'l Filler:

None Supp'1 Powdered Filler:

None See pages 3 & 4.

Tungs. Electrode:

N/A Tungsten Electrode Size:

None Consumable Insert:

None othur:

TECHNIQUE (QW-410) 3/32" - PCI #1480 String or Weave:

Both 1/8"

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Multipacc or Single (per side):Kultipass POSITIONS (QW-405)

Single or Mulipans Electrodos:

Single Cup Sizoc:

N/A Position of Groove:

1G Peoning:

N/A W31 ding Prog:

N/A Other:

N/A Othor:

N/A zwies.. rowe.mmtssnascJesu

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PSI Locatipn 466-1

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Type & Fiqurf_No.

Results Side Band OW-462.2 Acceptab1_e Side Rond OW-462.2 Accentable Sido Bend OW-462.2 Acceptablo Side._ Send __QW-4 62 t2 Accepta_ble SUABPJ V-NOTCl! IMPACT TEST ( IWA-4 5_121:

Acceptable.

Speciron ABS ENG Mils No.

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Lat. Exo.

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Weld-1 124 91 70

-50"F Wald-2 103 81 70

-50 F Wald-3 105 80 70

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SMAW E7018 3/32" DCRP 95 23 12.6 4 0 0"F 3

SMAW E7018 3/32" DCRP 95 23 12.2 410?

4 SMAW E7018 3/32" DCRP 95 23 11.2 4109P 5

SMAW E7010 3/32" DCRP 95 23 10.2 431*F 6

SMAW E7018 3/32" DCRP 90 22 10.5 4309P 7

SMAW E7018 3/32" DCRP 90 22 9.7 4 3 6*F 8

SMAW E7018 3/32" DCRP 90 22 10.6 405"F 9

SMAW E7018 3/32" DCRP 9C 22 5.9 420 F 10 SMAW E7018 3/3?"

DCRP 95 23 7.2 4 2 5'F 11 SMAW E7018 3/32" DCRP 95 23 4.6 4 2 0*F 12 SMAW E7018 3/32" DCRP 95 23 6.7 420 F 13 SMAW E7018 3/32" DCRP 95 23 8.6 4 31'F 14 SMAW E7018 3/32" DCRP 95 23 10.2 4 3 3*F 15 SMAW E7018 3/32" DCRP 95 23 10.5 438'F 16 SMAW E7018 3/32" DCRP 95 23 10.1 4 0 0"F 17 SMAW E7018 3/32" DCRP 95 23 9.2 410'F 18 SMAW E7018 3/32" DCRP 95 23 11.0 4 2 0'F 19 SMAW E7018 3/32" DCRP 95 23 11.1 42 5'F 20 GMAW E7018 3/32" DCRP 95 23 10.6 4 3 5*F Fill and Fainfgreement 21 SMAW E7018 1/8" DCR P 135 24 8.3 3 8 5'F 22 SMAW E7018 1/8" DCRP 135 24 6.5 4209P 23 SMAW E7018 1/8" DCRP 13$

24 6.5 410*F 24 SMAW E7018 1/8" DCRP 135 24 6.9 4307 25 SMAW E7018 1/8" DCRP 13C 24 8.2 4 04'F 26 SMAW E7018 1/8" DCRP 13C 24 9.0 4309P 27 SMAW E7018 5/32" DCRP 175 24 10.9 410*F 28 SMAW E7018 5/32" DCRP 175 24 11.2 4 3 0*F 29 SMAW E7018 5/32" DCRP 175 24 9.0 3959F 30 SMAW E7018 5/32" DCRP 195 24.5 9.7 4359F 31 SMAW E7018 5/32" DCRP 195 24.5 10.0 4319F 32 SMAW E7018 5/32" DCRP 195 24 7.9 4059F 33 SMAW E7010 5/32" DCRP 195 24.5 9.7 3759F 34 SMAW E7018 5/32" DCRP 195 24.5 12.0 4 00'F 33 SMAW E7018 5/32" DCRP 195 24.5 13.6 4 3 0*F 36 SMAW E7018 5/32" DCRP 195 24.5 7.9 4 4 0'F 37 SMAW E7018 5/32" DCRP 185 24 9.8 4 3 2'F 38 SMAW E7018 5/32" DCRP 190 24 8.6 4 4 4*F 39 SMAW E7018 S/32" DCRP 190 24 8.3 3 5 5*F 40 SMAW E7018 5/32" DCRP 190 24 6.9 367"P 41 SMAW E7018 5/32" DCRP 190 24 8.4 38997 42 SMAW E7018 5/32" DCRP 190 24 8.3 395F 43 SMAW E7018 5/32" DCRP 190 24 9.2 4 25'F i

l J

ATacuueur 5 p qe.5cf5 l

= ?!~3DOd T101 **

M PROCEDURE QUALIFICATION RECORD (PQR)

PQR; 466 Rev.

O Page 5 ot S Travel Preheat Weld Speed Interpass Layer Filler Metal Current Volts Range Temp.

EAps Process class ala.

Polar Rangn_

Ranon (IPM)

• ]E_

44 SMAW E7018 S/32" DCRP 190 24 9.3 440*F 45 SMAW E7018 5/32" DCRP 190 24 10.2 378'F 46 SMAW E7018 5/12" DCRP 190 24 7.7 39 5'F 47 SMAW E7010 5/32" DCRP 190 24 7.0 415 F 48 SMAW E7018 5/32" ECRP 190 24 7.6 4 3 0*F 49 SMAW E7018 5/32" DCRP 190 24 8.2 44 5'F SO GMAW E7018 5/32" DCRP 190 24 12.1 354*F 51 SMAW E701a 5/32" DCRP 190 24 10.5 370*F 52 SMAW E7018 S/32" DCRP 195 24.5 11.5 392*P 53 UMAW E7018 5/32" DCRP 195 24.5 10.4 400*F 54 SMAW E7018 5/32" DCRP 195 24.5 9.4 418"F 55 SMAW E7018 b/32" DCRP 195 24.5 8.9 4 41*F 56 SMAW E7018 5/32" DCRP 195 24.5 16.4 378 F 57 SMAW E7018 5/32" DCRP 180 24.5 15.2 395*F 58 SMAW E7018 5/32" DCRP 100 24 16.1 4 0 6*F 59 GMAW E7C16 5/32" DCRP 180 24 13.6 414*F 60 SMAW E7018 5/32" DCRP 180 24 14.5 425'F 61 SMAW E7018 5/32" DCRP 180 24 15.0 433cf 62 SMAW E7018 5/32" DCRP 180 24 15.3 4 4 0*F 8

63 SXAW E7018 5/32" DCRP 180 24 18.7 445 F Welder's Name:

D.

Newnan

_ Stamp No.:

M198 Teats conducted by:

Taussia Assoc.. Inc.

Test No.:

117997 W3 certify that the statements in this record are correct and that the tost volds were prepared, welded and tested in accordance with the requirements of Section IX and Section XI,1989 Edition, 1990 Addendo of the ASME Code.

Date: September 7, 1994 PCI Energy Services f-Manager, Weld Engineering

7.._

AT1WCMMEOT (o e

pa.gcr I o p 4 o

s M

ms WETDTNG PROCEDURE SPECIFICATION NUMBER 1-HST-1 (Manual SMAW)

PCI ENERGY SERVICES LAKE _DIfFF, ILLINOIS.

.=

QUALITY REV.

DATE WE,LD ENG.

DATE ASSUR4NCE DATE SYNOPSIS 0

09/07/94 1

- 09/07/94 df,,,gs09/07/94 Original Tssue

/

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ArrMMMELrr lo pa.se 2 ora M

WELDING PROCErfRE SPECTFICATION NUMBER ONE-HUT-CEE JMAhl7AL)

Rev. O September 7, 1994 Page 1 cf 3 Supporting Procedure Qualitication Records:

466.

1.0 SCOPE Manual shielded metal arc welding of P-No. 1 Group 1, carbon steel materials with Pont Weld Heat Treatment using the Half Dead Tener (HBT) Technique, with impact testing.

2.0 J_QINTS (OW-402):

Design:

U Groove and repairs.

Root Spacing:

Open Butt:

None.

Backing ring:

None.

Backgougo:

None.

Root conditicn:

Base metal temperbead groove.

Backing Material:

Integral.

Details:

Per design documents or WCP-6 Joint Design.

3.O BASE MATERTALS (OW-403):

Materials:

P-No.

1, Group 1 to P-No.

1, Group 1.

Thickness Rance Base Mat.erials:

SMAW:

Groove welds (t):

Unlimited.

Ocposited Weld Metal (Maximum):

SMAW:

Repair welds (depth of repair):

2".

Pipe diameters:

N/A 4.O FILLER MATERTAIE (CW-4C41:

SMAW:

F-No.

4, A-No.

1, SPA-No.

5.1, AWS No. E7018 - 3/32",

j l

1/8" or 5/32" diameter.

M%t

. Ma'Mnc7Rhe115Ut Dect ce orR WruL&rF0& awl: C

A rTMHMIDg (o pag e 3 o F 4 EMEhsdEk WPS1-HBT-1(Manual)

Revision O September 7, 1994 Page 2 of 3

j --

5.0 POSITIONS (OW-405):

Repair welds:

Flat.

Weld progression:

N/A 6.0 PREHEAT (ow-4 04)_:

Minimum preheat requirements:

3 50*F Maximum interpass temperatures:

4 5 0'P.

Preheat maintenance:

Flamn, radiant or electric.

7.0 POSTWEfD HEAT TREATMENT (OW-437):

Temperature range:

4 5 0'F-5 5 0*F Timo range:

2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> minimum.

Heating / Cooling Rates:

225'T per hour maximum.

8.0 GAS (OW-408):

None Shielding Gas:

None Flow Rate:

N/A Purge Cas:

None Flow Rate:

N/A Trailing Gas:

None Flow Rate:

None Gan Composition:

N/A 9.0

);LgpIf31 GAL _cithRACIf,R SIICS (CW-409):

Filler mat.

Current Travel Weld Type Amp.

Volt Speed Layer Process Class Dia.

Polar Ranae Range IPM 1

SMAW E7018 3/32 DCRP 70-130 19-23 4.6 min.

See Note 2

SMAW E7018 1/8 DCRP 90-160 20-24 6.5 min.

SMAW E7018 5/32 DCRP 120-200 20-25 69 min.

Fill & Cap:

Use 3/32", 1/8" or 5/32".

Repairo:

All the above:

NOTE: Layer 1 - (Hutter Head), only 3/32" electrode, shall be utilized.

14yer 2 - (Temper Bead), only 1/8" electrode, shall be utilized.

Layer 3 thru cap shall utilize 3/32", 1/8" or 5/32" electr.

r.

m

p ATTAc"%'t4DJT G yrse Ace A ME WPS I-HBT-1 (Manual)

Revision O september 7, 1994 Page 3 of 3 10.0 TECliNIOUE f0W-410):

String ur weave:

Both.

Orifice or gas cup:

None.

Peening:

Not permitted unless authorized by tho Manager of Weld Engineering.

Passes por side:

Multiple for the SKAW process.

Number of electrodes:

Single.

Maximum bead width:

4X wire core diameter maximum.

Initial, Intorpass &

Final cleaning:

Wire brushing, grinding, filing, deburring and/or chipping.

Method of backgougn:

Mechanical and/or thermal.

Pulsed current:

None.

11.0 RQTES:

1.

Covered electrodes nh.01 he baked and maintained in accordance with the manufacturer's recommendations.

After baking and before the electrodes are allowed to cool below 225'F, they shall be transfered to holding er drying ovens operating between 225'F and 350 F.

During the repair, electrodes removed from tho holding ovens for a period in excess of 8 hr shall be rebaked.

Electrodes shall not be rebaked more than once.

2.

The weld bead crown surface of the butter layer shall be removed by grinding or machining before depositing the second layer.

The completed weld shall have at least one layer of weld reinforcement deposited and then this reinforcement shall be removed by mechanical means, making the finished surface of the repair substantially flush with the surface surrounding the repair.

3.

The weld area shall be mainLained at a temperature of 450*T-SS0*F for a ninimum of 2 hr after completion of the weld repair.

4.

Maximum layer thickness shall be 1/2" for the SMAW process.

Filler metal shall be added on each pass.

5.

Thin Wolding Procedure Specification shall be used in conjunction with project design documents, the pCI Quality Assurance Manual, as applicable and the following Welding Control Procedures and/or standards:

GWS-1 " General Welding Standard for ASME and ANSI Applications".

WCP-6 " Welding Control Procedure for Joint Design".

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