AWS B2.1.5A.225 : 1999
AWS B2.1.5A.225 : 1999
STANDARD WELDING PROCEDURE SPECIFICATION (SWPS) FOR GAS TUNGSTEN ARC WELDING (CONSUMABLE INSERT ROOT) OF CHROMIUM-MOLYBDENUM STEEL (M-5A/P-5A), 1/8 THROUGH 1/2 IN. THICK, AS-WELDED CONDITION - 1/8 THROUGH 3/4 IN. THICK, PWHT CONDITION, IN521 AND ER90S-B3, PRIMARILY PIPE APPLICATIONS
American Welding Society