AWS B2.1-1-021:2018

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, Group 1 or 2), 1/8 through 1-1/2 inch Thick, ER70S2 and E7018, As-Welded or PWHT Condition
standard by American Welding Society, 04/10/2018

AWS B2.1-1-207:1996 (R2007)

Standard Welding Procedure Sspecification (WPS) for; Gas Tungsten Arc Welding of Carbon Steel (M-1/P-1/S-1, group 1 or 2), 1/8 through 1-1/2" think, ER70S-2, as-Welded or PWHT Ccondition (primarily pipe applications)
standard by American Welding Society, 06/07/1996

AWS B2.1-8-013:2002 (R2013)

Standard Welding Procedure Specification (Swps) for Shielded Metal Arc Welding of Austenitic Stainless Steel (M-8/P-8/S-8, Group 1), 10 through 18 Gauge, in the As-Welded Condition, with or without Backing
standard by American Welding Society, 06/10/2002