... 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 ... fighting system sprinkler pipe, structure pipe, scaffolding pipe, fence tubing, oil field pipe, Surface coating: ...