ML20237L412

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Rev 5 to Welding Technique Spec Aws 1-1,clarifying Technique for Applications of Weld Code 7/8 Procedures as Applied to Aws Welding Only
ML20237L412
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 09/12/1980
From: Freed K, Karner H
PACIFIC GAS & ELECTRIC CO., PULLMAN POWER PRODUCTS CORP. (FORMERLY PULLMAN, INC.)
To:
Shared Package
ML20237K209 List:
References
FOIA-84-743 AWS-1-1, NUDOCS 8708200213
Download: ML20237L412 (3)
v • d • e


Text

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Pullm:n Pswer Prsducts Page 1 of 3 DATE 9/12/80

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UELDING TECHNIQUE SPECIFICATION NO. AWS 1-1 l

a This document has been fomulated to clarify the technique for applications f

of Weld Code 7/8 procedures as applied to AWS welding only. This technique will be used in accordance with Pullman Power Products Process Sheet.

j DATE: 5/17/79 REVISION:

5 DATE: 9/12/80 SUPPORTING PQR(s): Prequalified Technique Specification for: Shielded Metal Arc Welding of ASTM A-36, A441, A-572 GR. 50, A-588, A-515 and A-516 in any applicable combination in accordance with AWS D1. 1-79.

l Base Metal: The base metal s' hall conform to those listed above. 'Other materials

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may be substituted with the approval of the Cognizant Welding Engineer.

Base Metal Thickness: This technique is qualified for welding of materials of unlimited thickness in accordance with AWS D1. 1-79.

Filler Metal: The filler metal shall conform to AWS SFA 5.1, Type E-7018.

Position of Welding: Welding will be dons in all positions. Weld progression will be vertical - up.

Preheat and Interpass Temperature: Preheat and interpass temperature shall conform to those specified below:

BASE METAL THICKNESS MINIMUM PREHEAT MAXIMUM INTERPASS (Actual) 0F.

OF.

i Up to 3/4" 500F.

5000F.

1 Over 3/4" through 1 1/2" 1500F.

500 F, 0

Over 1 1/2" through 2 1/2" 2250F.

500oF.

Over 2 1/2" 300 F.

500 F.

I When metal temperature is below 70 F, material will be flame dried. The preheat 0

requirement of a joint is established by the thickest member being joined. The I

preheat applies to both sides of the joint and to the entire length of the joint a minimum distance as shown below:

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TYPE OF WELD gTERIALTHICKNESS(t)

MINIMUM DISTANCE FROM POINT OF WELD DEPOSIT Fillet, Partial

( 3 Inches 3 Inches Pen. $ 1/4 t, and Base Metal

> 3 Inches (t) thickness of part 4

Repair;.f 1/4 t i

Full Penetration, All Thickness 2t Partial Pen. >. t '

t, Sace Metal 8708200213 B70814 PDR FDIA Repairs.> t t.

DEVINE84-743 PDR FO R I M..-. _.b m - ~ " ~4 y

Pullmin Pcwer Prtducts

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DATE: 9/12/80 WPS NO. AWS 1-1 Page 2 of 3 Cleanliness: ' All weld preps will be free of rust, scale, grease, and other contaminants for at least 1" from the weld prep edge.

Weld Parameters: ' Welding parameters are specified in the table oh page 1 of 1 Welding Technique: The welding technique shall be as follows:

)

10/21/80-

'A) ' BEAD WIDTH - All weld beads deposited in the flat (10), Horizontal (2G),

and Overhead (40) positions shall have a maximum width of three times '

i the core diameter of the electrode used with a tolerance of plus one core diameter, however, weaving is allowed on the cover pass only to a maximum of 5 times the electrode diameter. Weld beads deposited in the l

vertical (30) position have no maximum width, however, a weave width of 5 times the core diameter of the electrode used is recommended.

B) INTERPASS_ CLEANING - All weld beads will be free of all slag prior to continuation of welding. NEEDLE GUNS shall not be used for any cleaning operation.

C) DEFECTS - All visable defects, i.e., porosity, crater cracks, cold lap, shall be removed prior to the continuation of welding by grinding or filling.

D) RUN-OFF TABS AND BACKING STRAPS - Run-off tabs and backing straps will be used whenever possible. Run-off tabs should be removed. Backing straps need not be removed'unless specified by the owner or his desig-nated representative. Removal of run-off tabs shall be accomplished by thermal cutting within 1/8" of the weldment and then blended into the base metal by grinding. Alternatively, removal may be entirely accom-plished by grinding. Removal of backing straps will be accomplished i

by grinding or gouging to sound metal, and then back welded as needed.

When any thermal process is used, the applicable preheat requirements are mandatory. Preheat may be maintained during grinding as desired.

E) EASE METAL BUILD-UPS - Base metal build-ups will conform in all aspects of this procedure.

l F) WELD PROFILES - Weld profiles will be as follows:

1) Groove Welds - maximum reinforcement of 1/8" and shall blend smooth-ly into the base metal in accordance with the typical joint details and weld profiles, page 3 of 3
2) Fillet Welda - size in accordance with the field drawing (+1/8, - 1/16 for 10% of weld length) and profile in accordance with the typical joint details and weld profiles, page 3 of 3
3) The final surface will be smooth enough as not to interfere with N.D.E. operations. Preheat may be maintained during final surface conditioning operations.
4) T-Joints and Corner Joints Groove Welds - maximum reinforcement of 1/8" and shall blend smoothly into the base metal with reentrant configurations in accordance with the typical joint details and pro-files, page 3 of 3

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&""f ALL SMAW E7018 3/32 DCRP 65-100 27 2

1/8 100-165 31 2

5/32 140-220 34 3

Minimum 00 3/16 180-275 36 3

Maximum 0 APPROVALS:

Prepared by: Ud [mo #" Cognizant Welding Engineer

. Approved by:

Q.A. Manager Approved by: Y 5..

L PG&E Representative 1

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