Steel pipe Standard: ASTM A53, ASTM A795, ASTM A135, AS1074, S1387, EN10219 SIZE:OD16-406mm Certificate: ISO9001, CE, UL, API Steel pipeWeifang East Steel Pipe Co., Ltd. produce the high quality steel pipe, including ERW and seamless pipe. Standard: ASTM A53, ASTM A106, ASTM A795, ASTM A135, AS1074, API5L, API 5CT, BS1387, DIN2444, DIN 2394, DIN 2395, EN10219, EN39, JIS3444, UL797, UL6, UL852. ...