Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering API 5L ASTM A106 Gr. A/C X42/X46/X52/56/60/65/70 Carbon Seamless Steel Pipes, ASTM B280 C10200/C12000/C12200 Copper Pipe for Air Conditioning and Refrigeration, Heat Exchanger Tube ASTM A268 Tp410/Tp409/Tp444/Tp439 Seamless Stainless Steel Pipe and so on.