... )WT: 0.8mm-12mm 3)Length: 3-12m 4)Standard: ASTM, BS, EN, JIS, DIN, API, AS 5)Certificate:CE, UL ... produce and supply to you various steel pipes according to international standard. Black steel pipes are used in the following fields, steel ... customers since our good quality and service. 2. Production standard: ASTM A53, BS1387, EN10255, EN10240, EN10220, EN10219, EN39, JIS3. Section type: round ...