Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering API 5L Psl1/Psl2 SSAW Spiral Welded Carbon Steel Tube GB/T 9711 L245 for Oil & Gas Transmission, 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 and so on.