Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering ASTM A252 Grade 2 Grade 3 SSAW Carbon Steel Foundation Pile Pipe, Copper Nickel CuNi90/10 70/30 En 12451/ISO1634 ASTM B466 Corrosion Resistant Seamless Pipe, ASTM A269/A269m Welded Austenitic Stainless Steel Tubes for High Exchanger and so on.