Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering C44300 C44400 C44500 ASTM B111/111m B153/154 Copper Pipe Manufaturers, ASTM A312 Tp347 Fin Tube/Pipe Used for Heat Exchanger/Boiler/Oil Industry, Saf2507 Uns S327050 ASTM SA182/276/988 Duplex Stainless Steel Pipes and Tubes and so on.