Casing Pipe, Seamless Steel Pipe, High Pressure Boiler Tube manufacturer / supplier in China, offering Large Diameter X60/X70 ERW/SSAW Welded Carbon Steel Pipe, API 5CT J55 K55 L80 N80 C90 T95 P110 Casing Steel Pipe, ASTM A53/A106 Gr. B 3PE/2PE/2PP Coating Smls/Weld Carbon Steel Pipe and so on.