... 165.0mm 5.Wall thickness(mm):2.75mm-4.50mm 6.Zinc Weight:80-400g/m² ... head, e. Pickling, f. Grinding, g.Lubrication, h. Cold rolling, i. Degreasing, j. Solution heat treatment, k. ... Straightening, l. Cutting, m. Pickling, n. Inspection 12.Application:Water pipes, fire control, gas pipes, air pipes ... 6.6480388.5 4 8.341004114 4 10.851255140 4 13.421506165 4.5 17.81 Cold rolled galvanized steel ...