Seamless Steel Pipe, Piling Pipe, ERW Pipe manufacturer / supplier in China, offering ASTM A106gr. B Sch40 Black Iron Hot Rolled Carbon Steel Seamless Pipe, API 5L ASTM A106 A53 Gr. B Sch Xs Sch40 Sch80 Sch 160 Seamless Carbon Steel Pipe St37ms CS Seamless, API 5L Gr. B Lightly Oiled, Hot DIP Galvanized, Electro Galvanized, Black, Bare, Varnish Coating/Anti Rust Oil, Protective Coatings ERW Pipe and so on.