Seamless Steel Pipe, Boiler Tube, Casing Pipe manufacturer / supplier in China, offering ASTM 3PE Coating Anti-Corrosion Spiral Carbon Welded Steel Pipe S235/S265jr, DN15/DN32/DN65 Shouldered End Threaded Galvanized Round Steel Pipe for Structure, Welded Round Seamless Steel Precision 30 Inch Seamless Carbon Pipe S235jrg2 Spiral Pipe and so on.