Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering ASTM A135/A53 ERW Carbon Steel Pipe for Boiler and Heat Exchanger Applications, S32205 Tubo Redondo De Acero Inoxidable Super Duplex Sin Soldadura Tube, ASTM A268 Tp410 S41000 Ss Pipe Heat Exchanger Tube and so on.