ML20203A195

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Rev 0 to Quality Instruction QI-073, Documentation Review of Pipe Welds/Matl
ML20203A195
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 05/16/1986
From: Patterson A, Zill R
EVALUATION RESEARCH CORP.
To:
Shared Package
ML20202J051 List: ... further results
References
QI-073-01, QI-73-1, NUDOCS 8607170192
Download: ML20203A195 (21)
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Text

Page 1 of 11 EVALUATION RESEARCH CORPORATION COMANCHE PEAK RESPONSE TEAM PROJECT PROCEDURE FOR ISSUE-SPECIFIC ACTION PLAN VII.c CONTROLLED COPY CONTROL NO. DF-00/ -

PROCEDURE NO: QI-073 REVISION NO: 0 ISSUE DATE: 05/16/86 DOCUMENTATION REVIEW OF PIPE WELDS / MATERIAL

( Prepared by( ~ ~

Date: 6[/&/88 m

Approved by: .///t'W/' / /'k h Jo- Date: # -[

Issue Coordinator Approved by: [ Date: 5!/4/g4 Oh}SiteQAReprgsdntatpe /

s Approved by: LM Date: /L[%

/

QA/QC Review Team % der /

i 8607170192 860711 5 DR ADOCK 0500 L

QI-073

. Rev. O i 1.0 PURPOSE V This procedure provides detailed instructions and guidance for performing a documentation review of Pipe Welds / Material.

2.0 APPLICABILITY This instruction is applicable to the documentation review of the visually reinspected samples selected from the Pipe Welds / Material population at Comanche Peak Unit 1 and Common, and Unit 2. The population is described in the Population Description for Pipe Welds / Material, Reference 3.4.

3.0 REFERENCES

3.1 QA/QC-RT-2068, Description Memorandum for Documentation Review of Pipe Welds / Material, dated May 12, 1968, J. Schauf to A.

Patterson.

3.2 QI-050, " Reinspection of Pipe Welds / Material."

3.3 CPP-009, " Performance of Reinspections and Documentation Review."

( 3.4 " Population Description for Pipe Welds / Material."

4.0 GENERAL 4.1 Responsibilities 4.1.1 QA/QC Discipline Engineer The QA/QC Discipline Engineer prepares the documentation review instructions and checklist delineating the document review requirements, attributes, and accept / reject criteria.

4.1.2 QA/QC Inspectors QA/QC Inspectors perform and document the reviews in accordance with established project procedures and instructions. Reference 3.3 addresses the method used to perform documentation reviews and to document and process the results.

4.2 Policy s Activities performed under this procedure shall conform to the policies contained in the latest Comanche Peak Response Team s- Program Plan and Issue-Specific Action Plan VII.c.

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i QI-073 Rav. O I

l 4.0 GENERAL (Cont'd) 4.3 Definitions C of C - Certificate of Compliance CMC -

Component Modification Card CMTR - Certified Material Test Report DWG -

Isometric Design Drawing F -

Fillet welds IRV -

Interim Records Vault LBWM - Large Bore Welds / Material MIFI - Mechanical Installation Fabrication Inspector MRS -

Manufacturers Records Sheet MT - Magnetic Particle Examination NDE -

Nondestructive Examination OB - Open Butt welds l PFG -

Package Flow Group PPRV -

Permanent Plant Records Vault PT - Liquid Penetrant Examination PWHT -

Post Weld Heat Treatment QC - Quality Control (B&R)

RIR - Receiving Inspection Report RPS -

Repair Process Sheet RT -

Radiographic Examination SBWM -

Small Bore Welds / Material UT -

Ultrasonic Examination VT -

Visual Examination WDC - Weld Data Card WDP - Weld Data Package WE - Welding Engfruering WFML - Weld Filler Material Log WPS - Weld Procedure Specification 5.0 INSTRUCTIONS

, Using the information contained herein perform the documentation i review of the sample items in this population and document the results on the Checklist (Attachment 6.1).

4 Record any additional remarks on the Supplemental Remarks Form (Attachment 6.2). Documentation review data shall be recorded on the Data Recording Form (Attachment 6.3).

Obtain the applicable weld data package. Packages for Unit I and Common systems are filed as either Field Weld Packages (filed by isometric drawing number and field weld number) or Spool Packages (filed by isometric drawing number and spool number). Weld data packages for Unit I and Common systems which have been turned over TUGC0 are located in the TUCCO Permanent Plant Records Vault (PPRV). All other packages for Unit I and Common systems may be found in the Brown'& Root PPRV.

NOTE: Systems which:have :been turned over to TUGC0 are the Auxiliary Feedwater (AF), Boron Recycle (BR), Compressed Air (CA), and the Component Cooling Water (CC) systems.

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QI-073 Rev. O A

g)

( 5.0 INSTRUCTIONS (Cont'd)

Weld data packages for Unit 2 are filed as Isometric packages (filed by isometric drawing number). These packages may be found in the Brown & Root Interim Records Vault (IRV).

1. Base Material Traceability Verify, by review of the isometric drawing (DWG), the Weld Data Card (WDC), and/or the Manufacturers Record Sheet (MRS),

that the base material data (size, schedule / rating, material specification and grade, ASME Code Class, etc.) indicated on the DWG are the same as the material data certified in the Certified Material Test Report (CMTR), Certificate of Compliance (C of C),

and/or vendor Code Data Report. These documents are available in the Receiving Inspection Report (RIR).

. NOTE 1: It is acceptable to use upgraded Code Class material in a lower Code Class application (i.e.,

use Code Class 2 material in a Code Class 3 pipe line).

NOTE 2: Some items, such as vendor supplied components and materials, may not have all the base material data indicated on the DWG. In these cases also verify that any additional base material data supplied on

(/'~'}

/ the MRS (when available) is the same as the material data certified in the CMTR, C of C and/or vendor Code Data Report.

This attribute can be verified by utilizing the following steps:

Obtain the base material data from the DWG Bill of Materials, notes, and designations.

Obtain the WDC of the current weld joint from the weld data package and identify the base material data (spool no., piece no., heat no., serial no., "P" no. etc.)

entered in Material Identification Block.

Obtain the MRS from the weld data package for the spool number indicated above. For field welds (designated as FW) in Unit 1 and Common systems, it may be necessary to obtain the Spool Package for that DWG and spool number.

Obtain the heat / code numbers from the applicable spool

( piece item on the MRS bill of materials. (In some cases, heat / code numbers will be provided in the base material data on the WDC).

C

  • Obtain the RIR by cross-referencing the heat / code

(

numbers on the PPRV Brown & Root computer to obtain the RIR number. Sometimes the RIR documentation (CMTR, C of C, Code Data Report, etc.) has been pulled from the RIR and placed within the weld data package.

4 l ,-. _.- ._-- . _ _ . . . . -- .-. -

QI-073 Rev. O 6CN. 5.0 INSTRUCTIONS (Cont'd)

\. j

1. Base Material Traceability (Cont'd)

NOTE 3: Vendor supplied components and materials (such as valves, mechanical equipment, etc.) have location tag numbers (for valves) or mark / spin numbers (for equipment) indicated on the DWG. Serial numbers may be provided on the WDC Material Information Block or on the DWG. This information can be )

cross-referenced on the Brown & Root computer to  !

obtain the RIR number.

Also verify, by review, that the Base Material Traceability data (heat / code no., serial no., etc.) recorded on the visual reinspection Data Recording Form, does not conflict with the base material data obtained by review of the RIR documentation (CMTR, C cf C, Code Data Report, etc.)

NOTE 4: For Large Bore Pipe Welds (LBWM), refer to the Data Recording Form (QI-049, Attachment 6.4)

For Small Bore Pipe Welds (SBWM), refer to the Data Recording Form (QI-047, Attachment 6.6) f'~'g For piping specification categories 2003-2 (Feedwater) and I, 1303-2 (Main Steam) which are greater than 5/8" thick and more

\- than 6" nominal pipe size, and for attachments to such piping, also verify that the base material has been impact tested by identifying impact test results in the CMTR. The piping specification categories can be obtained from the last 3-digit or 4-digit group in the line number as shown on the drawing.

2. Weld Material Traceability Verify, by review, that the weld filler material and consumable insert material classification (s) used in the production of the welds, as identified on the WeAd Filler Material Log (WFML), are the same as the material data certified in the Certified Material Test Report (CMTR). These documents are available in the Receiving Inspection Report (RIR).

This attribute can be verified by utilizing the following steps:

Obtain the WFML of the current veld joint from the weld data package. The WFML should have the same identification as the WDC (serial no., drawing no.,

weld no., etc.).

Obtain the material classification (s) and heat / code

'f s,) numbers (s) for each veld filler metal and consumable k.s / insert identified on the WFML. In some cases, the WFML was replaced by a " Weld Filler Material Used" type section on the WDC.

v-5

QI-073 Rav. 0 5.0 INSTRUCTIONS (Cont'd)

2. Weld Material Traceability (Cont'd)

Obtain the RIR by cross-referencing the heat / code number (s) on the PPRV Brown & Root computer to obtain the RIR number. Sometimes the RIR documentation (CMTR, C of C, Code Data Report, etc.) has been pulled from the RIR and placed within the weld data package.

For piping categories 2003-2 (Feedwater) and 1303-2 (Main Stream) which are greater than 5/8" thick and more than 6" nominal pipe size, and for attachments to such piping, also verify that the veld filler material has been impact tested by identifying impact test results on the CMTR.

3. Weld Procedure Application Verify, by review, that both base materials, the base material thicknesses, the weld filler metals, and any Post Weld Heat Treatment (PWHT) applications (if applicable) used in the production of the weld joint, are the same or within the ranges specified in each Brown & Root Welding Procedure Specification (WPS) used.

O This attribute can be verified by utilizing the following steps:

Obtain the WPS number (s) identified on the WFML, the WDC, and/or the Repair Process Sheet (RPS) that were used in the production of the weld joint.

l Obtain the base material designations from the base material information on the DWG or MRS evaluated in Attribute 1 " Base Material Traceability". Use the ASME IX MATERIAL DESIGNATIONS table (Attachment 6.4) to check that the WPS supports the correct P-number and group number.

NOTE: If the material designation is not listed in the table or is not indicated in the base material information on the WDC, contact the welding specialist or population engineer.

Obtain the weld filler material and consumable insert material classifications from the weld material information on the WFML evaluated in Attribute 2 " Weld Material Traceability", and check that the WPS specifies the use of such materials.

A y-l 6

QI-073 Rev. O !

['"'

V 5.0 INSTRUCTIONS (Cont'd)

3. Weld Procedure Application (Cont'd)

Obtain the thicknesses of the base materials being joined (for butt weld applications). This information is indicated on the WDC or can be determined from the base material data on the drawing or MRS evaluated in Attribute 1 " Base Material Traceability". Check that the thicknesses fall within the range specified on the WPS.

When the WPS calls for PWHT, obtain the time at temperature and the heating and cooling rates from the Post Weld Heat Treatment Checklist and the temperature charts in the weld data package. Check that the PWRT time at temperature was at least that which was called for on the WPS and the temperature was within the range specified on the WPS. Also check that above 800*F, the heating and cooling rates do not exceed 400*F/ hour divided by the maximum thickness (in inches) of the material being heat treated, but in no case more than 400*F/ hour.

When the weld being treated has been subjected to multiple PWHT cycles, obtain the total time at O temperature from the accumulation of Post Weld Heat Treatment Checklists in the weld data package or from the Post Weld Heat Treatment Log maintained in the Mechanical Package Flow Group. Check that the WPS was qualified to at least 80% of the total time at temperature.

4. Weld Procedure Qualification Verify, by review, that the letter of approval from Gibbs and Hill or TUSI is on file for each applicable Brown & Root
qualified WPS. This letter is filed with the procedures in Document Control Center (DCC) or can be obtained from Welding Engineering.

i

5. Welder Qualifications '

I l Obtain all unique welder's symbols from the WFML. Check the Welder Performance " Qualification Record Listing Standard Tests" effective at the time of the welding (use the issuance date of the weld filler material on WFML) to obtain tests for which each welder was qualified for.

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QI-073 I Rev. O i l

5.0 INSTRUCTIONS (Cont'd)

5. Welder Qualifications (Cont'd)

NOTE 1: For situations where the WFML has been replaced by a " Weld Filler Material Used" section on the WDC, it may be necessary to determine the date when weld filler material was issued by obtaining the Weld Material Requisition (WMR) from the TUGC0 PPRV using the WMR number on the WDC.

Verify by reviewing the " Welder Qualification Matrix," that each welder was qualified at the time the welding was performed by the proper tests required by the WPS number (s) used.

NOTE 2: Be certain to read all applicable notes on the matrix.

Also verify, by review, that the welder's symbol (s) recorded on the applicable visual reinspection Data Recording Form matches one of the qualified welders' symbols verified by this attribute.

6. Hold Points 6.A Verify, by review, that the hold points established by s the ASME INSPECTION QUALIFICATION MATRIX (Attachment 6.5) and any additional hold points established on the WDC by Welding Engineering have been signed / initialed and dated by the QC inspector as satisfactory (SAT) on the WDC.

NOTE: To use the matrix of Attachment 6.5 it is necessary to determine the following:

Piping Specification Category - obtained from the last 3-digit or 4-digit group in the line number as shown on the DWG.

Code Class - obtained from the single digit at the end of the line number as shown on the DWG or from the Bill of Materials on the DWG.

"P" Number - use the "P" numbers identified in the verification of Attribute 3 " Weld Procedure Application," or obtain the ASME Material and Grade from the DWG Bill of Materials and use the the ASME IX MATERIAL DESIGNATIONS table (Attachment 6.4) to obtain the "P" number.

8

QI-073 Rev. 0

['" ' 5.0 INSTRUCTIONS (Cont'd)

( 6. Hold Points (Cont'd) ,

Joint Design - butt welds are designated as  !

OB and fillet welds are designated as F. For j nominal pipe sizes 2 inches and smaller (small bore) the joint shall have a fillet weld, and for nominal pipe sizes 21 inches and larger (large bore) the joint shall be a butt weld. For weldolet and sockolet connection welds to large bore pipe, the joint shall have a butt weld, and for integral attachments to piping the joint shall have a fillet veld. These joint types are typical unless otherwise specified on the DWG.

6.B Verify, by review, that any hold point recorded as unsatisfactory (U) or any weld repair that violated a previously accepted QC hold point has had a Repair Process Sheet (RPS) issued to reestablish the hold point (s). In addition, verify that the hold points ,

established by the REQUIRED EXAMINATION AND QC HOLD POINTS REQUIRED FOR REPAIRS matrix (Attachment 6.6) have been signed / initialed and dated by the QC Inspectors on the RPS.

NOTE 1: If the original weld inspection was completed, the weld repair NDE on the RPS should include final NDE that also meet the requirements of Attachment 6.5 to ensure complete inspection coverage.

NOTE 2: The RPS should have the same identification (serial no., weld no., drawing no., etc.) as the WDC.

6.C Verify that there is a Nondestructive Examination (NDE) report signed / initialed and dated by the QC Inspector as satisfactory for each required final NDE (as established by Attachment 6.5 and Attachment 6.6) in '

the weld data package. The NDE report should have the same weld identification (DWG and weld no.) as the WDC.

NOTE: It is acceptable for a signature on the WDC for NDE to be used in lieu of an individual report provided the inspection results are identified as satisfactory (VT, PT, and MT, I

only).

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

QI-073

, Rev. O m

i 5.0 INSTRUCTIONS (Cont'd)

7. Inspector Certification Verify, by review, that the QA/QC Inspector (s) who initialed /

signed, and dated the inspection results on the WDC, the RPS (if applicable), the NDE report (s), MRS, and/or the Pressure Test Data Sheet, were certified at the time that each inspection was performed. To accomplish this, check the Monthly Mechanical and NDE Certification Report effective at the time of the inspection or the inspectors certification records as follows:

The Inspector's area or category of certification at the time of inspection is QC Level II, as a minimum, for MIFI (or MI), VT, and/or the appropriate NDE, as applicable.

The Inspector's date of certification was on/or prior to the inspections performed, and inspections were performed prior to certification expiration date.

J NOTE: If this attribute is rejected, determine if the person that signed as a QC Inspector was ever certified

in the appropriate area or category.

i g If the inspector was certified, record the time period of certification and any subsequent recertification, otherwise state that the person was never certified.

l l 8. Hydrostatic Test j Verify that a hydrostatic (or pneumatic) pressure test was l performed on the piping which the sample weld is a part of and i

I that the Pressure Test Data Sheet in the Pressure Test Data Package has been signed and dated by a B&R QC Inspector as acceptable. The Pressure Test Data Sheet shall be for the latest pressure test performed on the sample weld.

Also verify, by review, that the pressure test was performed after any weld repairs which may have been identified in the weld data package (Unit I and Common systems o.nly) .

i For Unit I and Common systems: If a pressure test has not been performed, contact the population engineer to determine if it was exempt from a pressure test before rejecting this attribute.

If exempt from pressure testing mark "N/A" on the Checklist and

" Exempt from pressure test" in the remarks.

For Unit 2 systems: If a pressure test has not been perforced at this time, this attribute shall be marked "N/A" on the Checklist and " Package Unobtainable - Unit 2" placed in the remarks, y-10

QI-073 Rav. 0 7 5.0 INSTRUCTIONS (Cont'd)

/

8. Hydrostatic Test (Cont'd)

NOTE: System flow diagrams and drawings are provided in the Pressure Test Data Package which show test boundaries.

This attribute can be verified by utilizing the following steps:

From the DWG identify the line number for the pipe containing the sample weld. It may also be necessary to identify the spool number associated with the weld and/or any component identifications near the weld.

Obtain the Pressure Test Data Package number by cross-referencing this information (line number, spool number, and/or component identification numbers) cn the Startup Hydro Group's Startup Hydro Report computer listing (sorted by line number) or the PIMS (Plant Information Management System) Hydro Report computer listings (one sorted by line number, and another sorted by component number). The Startup Hydro Report and PIMS Hydro Report document s all pressure tests which have been performed. If there is no Pressure Test Data Package identified on these reports for the DWG information associated with the weld, it can be assumed that no pressure test has been performed.

Obtain the Pressure Test Data Package from the B&R PPRV, TUGC0 PPRV, or the B&R IRV.

6.0 ATTACHNENTS 6.1 Comanche Peak Response Team Checklist 6.2 Supplemental Remarks Form

(

6.3 Data Recording Form 6.4 ASME IX Material Designations 6.5 ASME Inspection Requirement Matrix 6.6 Required Examination and QC Hold Points Required for Repairs.

11

J.13 I[DiC.-

l UTILITIES GENERATING COMPANY TEIAS CPRT WORD PROCESSING REQUEST DATE IN: NEEDED BY TIME IN: DATE:

REQUESTED BY: TIME:

PHONE EXT.: ISAP File TRAILER NO.: 8M SY li WORD PROCESSING OPERATOR USE ONLY:

i DISK NAME:

DOCUMENT NAME:

SUBJECT:

ENTRY DATE:

COMPLETED BY:

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SPECIAL INSTRUCTIONS / REVISION f

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Attachasnt 6.1 QI-073 Rev. O O COMANCHE PEAK RESPONSE TEAM CHECKLIS.T F0FULATION DESC VERIFICATION PKG NO. l R-M-PIWM- PAGE 1 0F Pipe Walde/ Material QUALITY INSTRUCTION QI-073 0 art"sricrto= 0 cult t EQUIPMENT MARK / TAG NO. @ DOCUMENTATION REVIEW O ustT z O connow VERIFICATION ACCEPT REJECT DATE

1. Base Material Traceability
2. Weld Material Traceability
3. Wald Procedure Application
4. Weld Procedure Qualification
5. Walder Qualifications
6. Hold Points
7. Inspector Certification.

l

8. Ry.1rostatic Test l

l f PREPARED BY: APPROVED BY:

l DISCIPLINE ENGR. DATE LEAD DISCIPLINE ENGR. DATE inrEvaw BY: . APPROVED BY:

L N EbauR DATE (EAD [NSpgC*0R DATE r

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Attachamt 6.2 l QI-073 Rev. O Page 1 of 1 SUPPLEMENTAL REMARKS FORM PIPE WELDS / MATERIAL VERIFICATION PACKAGE NO. R-M-PIWM-4 ATTRIBUTE (No./ Description) REMARKS 4

J N

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1 i

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INSPECTOR DATE  :

1 4~

Attachment 6.3 QI-073 Rev. O Page 1 of 1 O

( DATA RECORDING FORM PIPE WELDS / MATERIAL VERIFICATION PACKAGE NO. R-M-PIWM-a DOCUMENT LOCATION SOURCE DOCUMENT (B&R PPRV, TUGC0 PPRV, IRV, PFG, DOCUMENT IDENTIFICATION WELDING ENGINEERING, DCC, ETC.)

WDC I

ES i

WFML RIR t

i WMR

l RPS J

l OTHERS: f l

l r

LIST OF FILLER MATERIALS CLASSIFICATIONS USED*

1. 2. 3. 4. 5.
6. 7. 8. 9. 10.
11. 12. 13. , 14. 15.
  • Place an "(R)" after the classification if the weld filler metal was used in a repair.

v-

Attachmant 6.4 QI-073 Rev. O Page 1 of 1

p ASME IX MATERIAL DESIGNATIONS i ASME IX Designation P-Number Group Number Base Material Specification 1 1 SA-106 Grade B SA-155 Grades KC60, KC65 SA-234 Marking WPB (60)

SA-333 Grade 6 SA-420 Grade WPL6 SA-516 Grade 65 1 2 SA-105 SA-155 Grades KC70, KCF70 SA-234 Marking WPB (70)

SA-350 Grade LF2 1

SA 420 Grade WPL6 SA-516 Grade 70 8 1 SA-182 Grade F 22

SA-234 Marking WP22 SA-387 Grade 22 Class 1 SA-182 Grades F304, F316 I SA 312 Grades TP304. TP316

, SA-358 Grades 304, 316 SA-376 Grades TP304, TP316 i

SA-403 WP304, WP316 l

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__ . _ . .~ _ -. - - _- - -. . . ._ - ___ _

Attechmsnt 6.5 QI-073 Rev. O Page 1 of 3 ASME INSPECTION REQUIREMENT MATRIX l

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Attache.snt 6.5 QI-073 Rev. O

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Attechmznt 6.5 QI-073 Rev. O ASME INSPECTION REQUIREMENT MATRIX fs NOTES:

! )

^'w / 1. For dissimilar metal shop welds the root and final weld surfaces shall be liquid penetrant examined and 100% RT is required for butt welds.

2. Final MT, PT or RT required for butt welds greater than 4".
3. For P-1 materials, PT may be substituted for MT. For socket welds, PT will normally be performed.

4 Full penetration butt and corner welded branch and piping connections shall require final NDE as follows:

a. Class one weldments greater than 4" require RT and MT or PT.
b. Class one weldments equal to or less than 4" require MT or PT.
c. Class two weldments greater than 4" require RT.
d. Class two weldments equal to or less than 4" require MT or PT.

NOTE: MT or PT is required externally, and when accessible, internally.

5. PWHT required for P-1 and P-5 materials as required by ASME Section III. If PWHT is required, use WPS with PWHT.
6. Ferrite testing may be waived by the Project Welding Engineer (PWE) by noting " Ferrite Testing Waived" on the WDC. Otherwise, the

{

delta ferrite check shall be accomplished by a welding technician

. and surveillance over such operations shall be performed as follows

! by the establishment of a QC hold point for delta ferrite: Class 1 weldments, 100% QC hold point. Class 2 & 3 weldments, 10% random QC hold point.

7. All Code Class 1 & 2 weld end preparation surfaces 2" or more in thickness shall be examined by the magnetic particle or liquid penetrant method.
8. Purge Dam Removal required for welds made in the field where purging is required by the applicable WPS.
11. In addition to mandatory hold points, Welding Engineering may add additional QC holdpoints where deemed necessary.

NOTE: QC hold points may be on a surveillance or other system other than the WDCs at the option of the PWE or Site QA Manager.

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1 l

Attachmant 6.6 QI-073 Rev. O Page 1 of 2

.bh d REQUIRED EXAMINATION AND QC HOLD POINTS REQUIRED FOR REPAIRS 4

Repairs e Repair Completed lo Cavity Repair Base FT HT iu VT FT HT RT VT UT Metal {

Defects ll w

g 8  :::

(1) Re-pairs not re- C 5 1 2 quiring >

welding i (2) Less 4 1 than 10% E or 3/8" X X X X below 5 1 4 1 min. vall h X X X X X X b (3)

Creater S 4 I than 10%

  • X X X X X or 3/8" below 5 1 4 1 e

Min. vall W X X X X X X X Weld pepairs #

(1) Hi-nor re- I 2 Pairs O X X X X not re-euiring velding (2) Ma- y 4 4 4 jor re- e pairs E X X X X J X Code Stampad Parts Appur-tenances

Attachnsnt 6.6 QI-073 Rev. 0

-p) w_ / BEQUIRED EXAMINATION AND QC HOLD POINTS REQUIRED FOR REPAIRS REPAIR CHART NOTES:

1. MT may be substituted for PT where applicable. I
2. When it is not possible or practical to examine a possible minimum wall violation through UT measurement, Mechanical measurement of i wall thickness may be substituted.
4. The examination of repairs shall be repeated as required for the l original item except that repair of defects originally detected by '

MT or PT methods when the repair cavities do not exceed the lesser of 3/8" or 10% of the minimum wall thickness need only be re-examined by an MT or PT method. If the repair cavity exceeds the above, RT is required.

5. PT is required for Class I components only. All other component classes shall receive a a si the cavity.

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