rectangular pipe,galvanized square pipe,steel square tube,galvanized steel tube galvanized square tube1)Out ... ~Q235 4)Kinds: Galvanized and hot rolled, cold rolled 5)Standard: BS1139, BS1387-BS1385, ASTMA53B, Sch10-40, ASTMA500, API5L, API5CT, DIN2440andEN10219 ...