... Q235, Q345B 3.Standard: GB, ASTM, BS, JIS square pipe1.Item: Square hollow section, square pipe, square tube2.Standard: GB, ASTM, BS ... , JIS, 3.Material: Q195, Q215, Q235, Q345B, X42, ... signed We are specialized in the supply of ERW pipe, seamless steel pipe, hollow section, galvanized steel coins, steel plate, stc. ...