AWS B2.1-1-235:2006
Standard Welding Procedure Specification (Swps) for Argon Plus 2 Oxygen Shielded Gas Metal Arc Welding of Carbon Steel (M-1/P-1/S-1) Groups 1 and 2, 1/8 through 1-1/2 inch Thick, ER70S-3, Flat Position Only, As Welded or PWHT Condition, Primarily Pipe Applications
standard by American...
AWS B2.1-1-234:2006
Standard Welding Procedure Specification (Swps) for Argon Plus 25% Carbon Dioxide Shielded Flux Cored Arc Welding of Carbon Steel (M-1/P-1/S-1) Groups 1 and 2, 1/8 through 1-1/2 inch Thick, E7XT-X, As-Welded or PWHT Condition, Primarily Pipe Applications
standard by American Welding...