Steel Pipe, Carbon Steel Pipe, Seamless Steel Pipe manufacturer / supplier in China, offering ASTM A36 / En10025 S275jr Hot-Rolled H Beam for Structural Applications, API 5CT - J55 K55/ N80/ K55 Carbon Hot Rolled Seamless Steel Pipe, ERW Steel Pipe En10219 S235/S275/S355 Electric Resistance Welded Pipe for Structural and Pipeline Applications and so on.