steel tube according to ASTM A53, DIN 2394, DIN2395, BS1387,ASTM A500. for structure and transferring water and gas. ... , round and rectangular or square, aew according to standards ASTM A53, ASTM A106, ASTM A795, ASTM A135, ASTM A500, API 5L, API5CT, UL6, UL797, ... JIS G3444, BS1387, DIN2394, DIN2395, or similar standards. According to buyer's request is available. SIZE: 16mm-406mm, Wall thickness ...