Black Steel Pipe (ASTM A53, BS1387) 1.O/D:21.3~219.1MM 2.W/T: 2.8~6.5MM 3.Black, H.D.G., Pregalvanized 4.MOQ: 10T Material: Carbon steel Grade: Q195, Q215A, Q235A, B, Q275, Q345A, B Section: Round Technique ERW (Electrical Resistance Welding) Length: Standard: 6m/12m; Customized: 1~13m Application: Used for the conveyance of running water, gas, air, sewage, heating steam and water, etc and ...