AWS B2.1.001 : 1990
AWS B2.1.001 : 1990
STANDARD WELDING PROCEDURE SPECIFICATION (WPS) FOR SHIELDED METAL ARC WELDING OF CARBON STEEL (M-1/P-1, GROUP 1 OR 2), 3/16 THROUGH 3/4 INCH, IN THE AS-WELDED CONDITION, WITH BACKING
American Welding Society