AWS B2.1-1-008:2002 (R2013)

Standard Welding Procedure Specification (Swps) for Gas Tungsten Arc Welding of Carbon Steel (M-1, P-1, or S-1), 18 through 10 Gauge, in the As-Welded Condition, with or without Backing
standard by American Welding Society, 01/01/2002

AWS B2.1-1/8-229:2002-AMD1 (R2013)

STANDARD WELDING PROCEDURE SPECIFICATION (SWPS) FOR GAS TUNGSTEN ARC WELDING FOLLOWED BY SHIELDED METAL ARC WELDING OF CARBON STEEL (M-1/P-1/S-1, GROUPS 1 OR 2) TO AUSTENITIC STAINLESS STEEL (M-8/P-8/S-8, GROUP 1), 1/8 THROUGH 1-1/2 INCH
standard by American Welding Society, 08/28/2002

AWS B2.1-8-321:2018

Standard Welding Procedure Specification for Naval Applications (SWPS-N) for Gas Tungsten Arc Welding with Consumable Insert Root of Austenitic Stainless Steel (S-8), 1/8 inch [3 mm] through 1-1/2 inch [38 mm] Thick, MIL-3XX, in the As-Welded Condition, Primarily Pipe for Naval Applications
standard by American Welding Society, 08/03/2018