Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering ASTM 312 TP304/316L/310S Sch 10/20/30 Seamless Stainless Steel Tube Gas/Oil Pipe, JIS G3452 Od 3.18-810mm/Customized Class1/2 Welded Pipe Carbon Steel Tubes, Super Duplex 2507 (UNS S32750) Seamless Pipe ASTM A790 Sch40/Sch80 Offshore&Chemical Processing and so on.