AWS B2.1-1-209:1996 (R2007)
Standard WPS for Gas Tungsten 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" Thick, ER70S-2 and E7018, As-Welded or PWHT Condition, Primarily Pipe Applications
standard by American Welding Society, 06/07/1996