Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering ASTM B111 CZ110 Copper Tube for Engine Oil Cooler and Heat Exchanger, En10216-1 P235gh/P195gh/P255ql Seamless Carbon Steel Tubes for Power Plant, JIS G3454 Welded Steel Pipe for General/Ordinary Industrial Piping and so on.