Standard Welding Procedure Specification (SWPS) for Gas Tungsten Arc Welding with Consumable Insert Root of Austenitic Stainless Steel (M-8/P-8, Group 1), 1/8 in [3 mm] through 1-1/2 in [38 mm] Thick, IN3XX and ER3XX, As-Welded Condition, Primarily Pipe Applications