Hot Galvanized welding Steel Pipe and Tube 1) Standard: ASTM DIN ... : Round pipe diameter: 16mm-610mm, thickness: 0.8-20.0mmB: Surface finish: black, blank, bright and galvanized C: Length of each ... A513, BS1387, DIN2391, DIN2394, DIN17175, JIS G3452, EN10210, EN10305 et Hot Galvanized welding Steel Pipe and Tube