B2.1-1-207: 1996(R2007) STANDARD WELDING PROCEDURE SPECIFICATION(WPS) FOR; GAS TUNGSTEN ARC WELDING OF CARBON STEEL(M-1/P-1/S-1, GROUP 1 OR 2), 1/8 THROUGHT 1-1/2 INCH THICK, ER70S-2, AS-WELDED OR PWHT CONDITION(PRIMARILY PIPE APPLICATIONS)