... -900g/m2 3. Strong productivity GB/T 3094 erw welded hot dip galvanized ... removedStandardsASTM A500, ASTM A 53, EN 10210, EN 10219, JIS G 3466, GB/T 6728, BS ... 1387, BS 6323, IS : 3074, IS : 4923, DIN 1626, DIN 2394Steel gradeDIN 17100(EN 10025), ST33, ST37, ASTM A500, ASTM ... Our Popular Size (Hot Sales!) GB Main Products (Specification)Rectangle pipe ...