ML20205Q612

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Rev 8 to Instruction CP-EI-4.6-8, Field Design Change Control for Large Bore Pipe Supports
ML20205Q612
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 07/05/1984
From:
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20205Q559 List:
References
FOIA-85-59 CP-EI-4.6-8, NUDOCS 8606020277
Download: ML20205Q612 (6)
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s-TUGCO ENGINEERING DIVISION INSTPUCTION REVISION ISSUE PAGE

m. DATE

-04 1 of 6 CONTROLLED COPY BD. CP-EI-4.6-8 8 NG CONTROL .% ,

PREPARED EY 4 \.-l.- LO A R LARGE BORE PIPE SUPPORTS ,

APPROVED BY ( w, .m -

1.0 REFEREICE 1-A CP-EP-4.6 Field Design Change Control

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2.0 GENERAL 2.1 PURIOSE The purpose of this instruction is to set forth the methods by which the provisions of Reference 1-A are inplemented by Pipe Support Engineering (PSE).

2.2 SCOPE .

'Ihis instruction describes the handling of design cnanges to the point of desion verification.

This instruction does not include design review or the securing of necessary original designer and/or vendor approvals.

2.3 RESPONSIBILITY The CP Project Pipe Support Engineer (PPSE) is responsible for providing technical direction and administrative guidance to the PSE organization.

The delecation of authority to approve design changes made in accordance with this instruction is the responsibility of the Chief Engineer (s). Authority shall be granted cn the basis of each person's wrk performance and experience.

Where a specific individual is designated by title in this instruction, it is understood that his designee can act in that official capacity.

8606020277 860521 PDR FOIA GARDE 85-59 PDR 9

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. TUGCO DiGINEERING DIVISION INSTRUCTION REVISION _ ISSUE PAGE DATE CP-EI-4.6-8 8 7-5-84 2 of 6 3.0 INSTRUCTION 3.1 DESIGN CHANGE AUIHORIZATION (DCA) FORM The DCA form shall be prepared in accordance with Reference 1-A, Attachment 1. An individual authorized per Section 2.3 shall approve the change. Such approval shall release the chance for construction.

Distribution shall be in accordance with " Standard Distribution" as preprinted on the DCA form. Additional distribution shall be indicated as required.

3.2 COMPONENU MODIFICATION CARD (CMC) e i

3.2.1 General Recuirements CMC's shall be drawn from DCC by respective PSE clerks and drawn by individuals frcrn the clerks as required.

The clerk shall raintain a log of each C4C issued. This log shall ,

include the following information:

a. GC Serial Number
b. Document / Drawing Number Affected
c. CMC Originator's Initials i
d. Date Issued i r

CMC's shall be prepared in accordance with Reference 1-A, Attachment i 2.

An in$ividual authorized per Section 2.3 shall approve the cnange.  :

Such approval shall release the change for construction.

  • l Guidelines outlining the complexity and type of design changes to '

be utilized by CMC's shall be established by the Chief Engineer (s). '

3.2.2 Distribution of CMC's i

3.2.2.1 Pipe Support CMC's shall be distributed as follows: I r

1 a. DCC 1 Copy f

b. Hanger Package 1 Copy (hhen Package is available)
c. Welding Engineering Substation (when Package 1 03py l is not available)
d. Material Control 1 Copy .,
e. HPr Design Change Control Group 1 Cocy (
f. PSE CMC file 1 Copy f

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'IUGCD ENGINEERING DIVISION INSTRUCTION REVISION ISSUE PAGE DATE CP-EI-4.6-8 8 7-5-84 3 of 6 he following shall be indicated per Section 9 "Distrioution" of the CMC:

a. Technical Services 2 Copies
b. Damage Study Group 1 Copy (for relocated supports on High Energy Lines) te clerk or responsible engineer shall enter the OC numJoer on the weld data card when the hanger package is available and shall enter the CMC number in the appropriate design change log.

3.2.2.2 Fire Protection Pipe Support 01C's, which are in Grinnell scope, shall be distributed as follows:

a. Grinnell - Site 4 Copies
b. Hanger Package 1 Copy I
c. Material Control 1 Copy
d. Support Design Package 1 Copy
e. PSE CMC File 1 Copy
f. Design Change Trackina Group 1 Copy The responsible engineer or clerk shall rote on the back of the controlled drawing the affecting 01C's and shall date and initial the entry. He CMC entry shall also be made on the appropriate design change log.

3.2.3 OIC Retention The original CMC shall remain on file with PSE until such time as it can be reasonably determined that the OIC will no longer require revision. At that time the original CMC shall te transmitted to Technical Services.

j 3.2.4 CMC Revisions '

3.2.4.1 te original O!C may be revised by completing the following:

a. Be appropriate revision number shall be placed adjacent to the serial number.
b. Changes to the OiC shall be clearly marked with the revision nurber and the revised area shall be ballooned. l .

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'IUGCO ENGINEERING DIVISION INSTRUCTION REVISION ISSUE PAGE

. DATE CP-EI-4.6-8 8 7-5-84 4 of 6

c. All previous revision marks shall be removed.
d. Se card shall contain the following statement: "%is revision voids and supersedes document serial number revision l

3.2.4.2 Distribution of revised CMC's shall be in accordance with Section 3.2.2. We clerk shall enter the revision into the hanger package and renove or void any outdated revisions. khen the hanger package is not available, the entry shall be made by the WE substation.

3.2.5 Voiding CMC's When an occasion arises where a 01C has been issued and is to longer necessary, it must be voided. 'Ib void a CMC it must be revised and clearly marked " Void - Not Superseded." A O!C which has been voided shall not be reactivated. Distribution of voided GiC's shall be in accordance with Section 3.2.2.

3.3 FIEI.D MODIFIED MANGER SKEI'CH (FMHS) 3.3.1 'Ib prepare a ENHS, a mpy of the support drawing shall be marked clearly depicting the necessary design changes. As a minimum, PSE shall provide the following information:

a. Material types and sizes
b. Hardware requirements
c. Workirg point dimensions
d. Weld type and sizes
3. 2 PSE shall review existing design changes which may affect the support drawing and incorporate necessary information into the FMHS. All design changes affecting the drawing shall be roted on the sketch with its disposition (i.e. voided or incorporated).

3.3.3 he EMHS and any original CMC's shall be transmitted to Technical Services Mechanical Drafting (TSMD) for revision of the appropriate support drawing. Transmittal shall te accomplished by the standard form letter shown in Attachment 1.

Each transmittal letter shall be numbered sequentially.

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IUGCO ENGINEERING DIVISION INSTRUCI' ION FEVISION ISSUE PAGE*

DATE F

CP-EI-4.6-8 8 7-5-84 5 of 6 Each transmittal letter shall be signed by an authorized PSE representative. Receipt of the transmittal letters shall be acknowledged by signing and datirg by TSMD. A copy of the transmittal letter and FMHS shall be maintained by PSE. Rese files may be purged after the revised drawings are issued.

3.3.4 After incorporation of the design changes by TSMD, an authorized individual from PSE shall review the revised drawing to assure its accuracy. Upon acceptable review, the authorized individual shall initial and date the drawing authorizirs its distribution. Drawings authorized herein are approved for fabrication and/or construction.

TSMD shall distribute drawings in accordance with established procedures / instructions.

3.4 hT_LDED ATTACHMETIS Special attention should be paid to any designs or design changes i effecting welded attachments to pipe which has been previously j hydro-tested. According to the ASME Code, only the following welding can be performed on previously hydro-tested piping without requiring retesting:

1. Full penetration wlds for material up to 1/2" thick for lengths not to exceed 12".
2. Fillet welds with throat thicknesses up to 3/8" for lengths not to exceed 24".
3. Partial penetration welds with grooves up to 3/8" depth for lengths not to exceed 24".

In the event welding is specified which meets or exceeds the above criteria (extracted from NB-4436), the drawing or design change shall include a note similar to the following: "NB-4436 WELD CRITERIA MET OR EXCEEDED." h is note requirement shall not be retroactive.

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- 'IUGCO ENGINEERING DIVISION INSTRUCTION REVISION ISSUE PAGE DATE CP-EI-4.6-8 8 7-5-84 6 cf 6 J

ATTACHMENT 1 - TYPICAL TRANSMITIAL MJ5EER To: Mechanical Drafting /delding Engineering

Subject:

Transmittal of Field Modified Hanger Sketches / Packages Attached for your action are the following Field Modified Hanger Sketches /

Packages and original CMCs MARK 10. CMCs 1.

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5.

6.

7.

8.

9.

10.

11.

12.

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16, 17.

18.

19, 20.

Hanger Engineering Date Received by Mecn. Drafting Date feceived oy Welcing Engr. Date a

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