AWS B2.1-1-211:1996

Standard Welding Procedure Specification (WPS) for Gas Tungsten Arc Welding with Consumable Inserts Followed by Shielded Metal Arc Welding of Carbon Steel (M-1/P-1/S- 1, Group 1 or 2), 1/8 Through 1-1/2 Inch Thick INMs-1, ER70S-2, and E7018, As-Welded or PWHT Condition, Primarily Pipe Applications

American Welding Society , 01/01/1996