Steel Pipe, Steel Coil, Steel Sheet manufacturer / supplier in China, offering High Quality Welded Tube Pipe ERW Spiral Steel Hollow Section Carbon SSAW Metal Round Pipe, API 5L Grb ASTM A53 Grb Carbon Steel Welded Pipe Welded Steel Pipes, Large Diameter Carbon Steel Pipeline Round Section Shape Spiral Welded Tube Pipe for Water Transmission and so on.