ML20137G027

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Rev 1 to Welding Engineering Std WES-12, Radial Shear Bar Fabrication. Related Info Encl
ML20137G027
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 06/26/1977
From: Childress W, Mckee J
BROWN & ROOT, INC. (SUBS. OF HALLIBURTON CO.)
To:
Shared Package
ML17198A292 List: ... further results
References
FOIA-85-59 WES-12, NUDOCS 8512020124
Download: ML20137G027 (10)
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Text

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102 nn1 :

BROWN % ROOT,' INC.

July 21, 1975 REVISION 1, May 26, 1977 WELDING ENGINEERING STANDARD :

WES-12 PREPARED FOR COMANCHE PEAK STEAM ELECTRIC STATION TEXAS UTILITIES SERVICES, INC.

JOB NUMBER 35-1195 TITLE: RADIAL SHEAR BAR FABRICATION APPROVED BY:

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. COMANCHE PEAK STEAM ELECTRIC STATION 1980-82 2300 MN INSTALLATION

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B&R WELDING ENGINEERING STANDARD WES-12, REVISION 1 REF:

BRF-6347 FILE 09020 By-copy of this letter we are advising Brown & Root that Welding Engineering Standard WES-12, Revision 1, is " Approved for arrange-ment only, proceed with fabrication subj ect to compliance with all contract requirements, drawings and specifications".

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. doorneac Resident Engineer B & R DCC OlsT.

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'n1Ri lod 35-1195-WES-12, July 21, 1975 REVISION 1, May 25,1977 PAGE 2 of 7 1.

SCOPE 1.1 This standard orescribes methods and recuirements for the joining of reinforcing bar to flat bar material by means of full cenetration butt welds to fabricate radial shear bar assemblies for installation in concrete containment struc-tures in accordance with Paragraph 2.1.

2.

REFERENCES 2.1 Soecification 2323-SS-10 (Gibbs and Hill, Inc.)

2.2 FIGURE 1 - Weld Joint Design

- - 2.3 FIGURE 2 - Tensile Test Specimen 3.

BASE MATERIAL 3.1 Reinforcing bar shall be furnished in accordance with and to the recuirements of ASTM A 615 GR 60.

In addition, the material shall be restricted to a comcositional carbon ecuivalent limit of.55% as determined by the following formula :

%Mn + %Cu + %Ni + %Cr - %Mo - %V CE = C +

6 40 20 10 50 10 3.2 Shear Bars (1" X 4") shall be furnished from ASTM A 572 Grade 60 Plate.

3.3 Receipt of Certified Materials Test Reports is recuired prior to fabrication.

4.

FILLER MATERIAL 4.1 The Shielded Metal Arc Process shall emoloy electrodes of the E-8018 classification per SFA 5.5.

n - n v A sA cvv 35-1195-WES-12, July 21, 1975 REVISION 1, May 26, 1977 par,E 3 of 7 5.

JOINT PREPARATION 5.1 The rebar to bar weld joint shall be orepared as shown in Figure 1 by torch cutting, grinding or a combination of these.

Surfaces to be welded shall be cleaned by wire brush-ing, grinding or solvent to remove oil, grease, dirt, rust, loose scale, paint or other contaminants.

6.

PREHEAT 0

6.1 Preheat shall be 150 F minimum, acolied by oxy-fuel heat-ing and maintained for a minimum distance from the weld

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joint of 3 inches as determined by temoerature indicating crayons.

6.2 No welding shall be conducted during ceriods of inclement weather unless a protective environment is orovided. A 0

minimum of 200 F oreheat is mandatory when moisture is ore-sent on surfaces to be welded.

7.

FELD PROCEDURE 7.1 Weld Procedure Oualification shall conform to the anoli-cable reouirements of ASME B&PV Code,Section IX, exceat that bend specimens are not recuired.

7.2 Two (2) full size section tensile soecimens shall be cre-cared from the largest rebar size to be joined as shown in Figure 2, and upon satisfactory evidence of tensile strength (75 ksi) shall satisfy the test requirements of the rebar to bar weld joint connection cualification.

7.3 Details of welding oarameters are given in the acolicable Weld Procedure Specifications.

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35-1195-WES-12, July 21,1975 REVISION 1, May 26,1977 PAGE 4 of 7 8.

WELDOR OUALIFICATION 8.1 Prior to oroduction welding, each weldor shall produce two weldments as given in 7.2 above, and the test results shall eoual or exceed the specified minimum strength (75,000 PSI).

The extent of croduction welding allowed shall be restricted to the WPS and to the position (s) so cualified.

9.

PRODUCTION WELDING 9.1 Each oualified weldor shall be assigned a symbol to identify the work he produces. This symbol shall be affixed by use of paint stick or imoression stamos to an area on the bar (1" X 4"), near mid-widt'h and accroximately 1 inch from the weld toe.

9.2 Documentation of radial shear bar weld activities shall be a responsibility of the Ouality Assurance Decartment.

10. PRODUCTION TESTING 10.1 Examination of arc-welded joints shall be conducted in accor-dance with Paragraoh 7.0, Gibbs and Hill Soecification 2323-55-10, except that the minimum average tensile strength shall be 75,000 PSI. Tensile testing will be done by B&R OA/0C.
11. WELD REPAIR 11.1 Weld defects discovered by visual examination shall be re-paired by removal of the defect (s) employing air-are goug-ing and/or grinding and/or by the additio.n of weld metal to restore weld integrity and geometry in accordance with the established weld procedure specification. Re-examination of the repair (s) shall be accomolished by the NDE method that discovered the defect, and a]l repairs shall be examined to the same extent as tne original weld.

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35-1195-WES-12, July 21, 1975 REVISION 1, May 26, 1977 PAGE 5 of 7 11.2 When excavation of a defect (s) is reouired, the resulting cavity shall be restricted to a death and width dimension of 3/8 inches.

In the event the defect (s) is not comolete-ly removed after the excavation limits are reached, the weld joint shall be reolaced.

12. MATERIAL TRACEABILITY l

12.1 Filler material lot number is to be documented on each weld number line in the sign-off soace.

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2C131 106 35-1195-WES-12, July 21,1975 REVISION 1, May 26, 1977 PAGE 6 of 7 FIGURE I WELD JOINT DESIGN FIGURE 1 I

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TUSI-OR-2, Recuest No. 33, dated 8/18/75, 7

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0096 dated 8/12/75.

O WELD JOI).T DESIGt!

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L Uioi LG6 35-1195-WES-12, July 21,1977 REVISION 1, May 26, 1977 PAGE 7 of 7 FIGURE 2 i

TENSILE TEST SPECIMEN i

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Attention:

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TEXAS UTILITIES GENERATING COMPANY

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1981 2300.T4 INSTALLATION

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SPECIFICATICN 4323-SS-10 )

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Enclost.d f. your information and use are six (E) copies of Spr.cification 2323-SS-10, Revision 4 dated March 2,

1979, entitled " Reinforcing Steel".,

The following documents have been incorporated in this revision as recuested in TGH-10722:

DC/DD 81, 159, 194

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GC!- 362'57 April 30, 1979 Texas Utilities Generating Company Other documents listed in TGH-10722 do not involve specifi-cation deviation and have not been incorporated in this revision.

FPAR-2, DR12 and DR16 have previously been included in the specification.

Several other minor revisions have been made.

Very truly yours, GIBBS & HILL, Inc.

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'HRR-ELB-MLB:lc Harvey R.

Rock 1 Letter + 6 Copies Project Manager CC:

ARMS (B&R Site) OL + 1A

- H. C. Schmidt (TUSI Dallas) 2L 2A J.

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Kuykendall (TUGCo Site) lL 1A R.

E. Holloway (GrrH Dallas) 2L 2A O

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