The data to support this Standard Welding Procedure Specification (WPS) were derived from the above-listed Procedure Qualification Records (PQRs) which were reviewed and validated under the auspices of the Welding Research Council. This Standard WPS is not valid using conditions and variables outside the ranges listed. The American Welding Society considers that this Standard WPS presents information for producing an acceptable weld using the conditions and variables listed. The user needs a significant knowledge of welding and accepts full responsibility for the performance of the weld and for providing the engineering capability, qualified personnel, and proper equipment to implement this Standard WPS.
AWS B2.1-4-220
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Standard Welding Procedure Specification (WPS) for Gas Tungsten Arc Welding (Consumable Insert Root) of Chromium-Molybdenum Steel (M-4/P-4, Group 1 or 2), E8018-B2, 1/8 Through 1/2 in. Thick, As-Welded Condition, 1/8 Through 3/4 in. Thick, PWHT Condition IN515 and ER80S-B2, Primarily Pipe Applications
American Welding Society , 01/01/1999
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