... : 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 ... , fire fighting system sprinkler pipe, structure pipe, scaffolding pipe, fence tubing, oil field pipe, Surface coating: hot dipped galvanized, painted, powder coating Ends type: Plain ends ...