Pipe Welding 101 - Getting A Head Start Welding Technique Pipe Welding 101 - Getting A Head Start Welding Technique shenzhoutongsteel.com Product Seamless Boiler Tube Process Hot Rolled/Cold Drawn Standard ASTM A178,A179,A192,A210,A106 Material GR.B,GRC O.D 1/2”--30”(21.3--762mm) W.T 0.055”--2”(1.65--50mm) Length As per customer’s requi