... -frequency welded 2) OD: 10mm-219mm 3) Thickness: 0.5mm-10mm 4)zinc:300g-400g 45-70um Galvanized Steel ... 1020mm(5)Wall Thickness (W. T. ): 0.2mm-40.0mm(6)Length: 0.5M TO 14M, 5.8M, 6M, ... 12M or special length,(7) Chemical Composition: Steel No: Q195, Q235; C: 0.20, P: 0 ... .015, S: 0.025, ASTM GRA/B(8) Zinc-Coating Thickness ...