... : steel pipe ,weld steel pipe 1) Standard: ASTM DIN a) O.D : 16 - 610mm b) Wall thickness: 0.8-20mm A: Size Range: Round pipe ... : Surface finish: black, blank, bright and galvanized C: Length of each pipe: 500mm-16,000mm D: Steel grade: Q195 - Q235A, ST37-2, ST52 ... to international standards, like: ASTM A53, ASTM A500, ASTM A513, BS1387, DIN2391, DIN2394, DIN17175, JIS G3452, EN10210, EN10305 et