Steel Pipe, Steel Tube, Welded Steel Pipe manufacturer / supplier in China, offering ASTM A106 Gr. B Sch 40 80 160 Carbon Steel Seamless Tube ASME B36.10 PE Coated or Black Painted Smls Steel Pipe, ASTM A106/ API 5L Gr. B Schedule 40 Black Iron Pipe Seamless Carbon Steel Pipe, Q235B Q355b Hot Dipped Galvanized Hollow Section Steel Pipes and so on.