... , ASTM A513, BS1387, DIN2391, DIN2394, DIN17175, A: Size Range: Round pipe diameter: 16mm-610mm, thickness: 0.8-20.0mmB: Surface finish ... : black, blank, bright and galvanized C: Length of each pipe: 500mm-16,000mm D: Steel grade: Q195 - Q235A, ST37-2 ...