Steel pipe Standard: ASTM A53, ASTM A795, ASTM A135, AS1074, S1387, ... , API Steel pipeWeifang East Steel Pipe Co., Ltd. produce the high quality steel pipe, including ERW and seamless pipe. Standard: ASTM A53, ASTM ... thickness 1-20mm Usage: transferring fluid, fire fighting system sprinkler pipe, structure pipe, scaffolding pipe, fence tubing, oil field pipe, Surface coating: hot dipped galvanized ...