AWS B2.1-1-001-90 (R2006)

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 CONDITIONS WITH BACKING
standard by American Welding Society, 12/18/1989