Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering ASTM B111 Certified C7100/71500/71520 Copper Welded Tubes: E8/29/53/54, ASTM TP304 316 API Hot Rolled Extrusion Cold Drawn Stainless Steel Pipe, ASTM A268 Tp410/405/429/430 Seamless Stainless Steel Pipe for Heat Exchanger Tube and so on.