Copper-Nickel Tube/Nickel Alloy Tube manufacturer / supplier in China, offering Duplex S31803 Threaded Tees ASME B16.11 Sour Gas Service, Duplex Steel Rtj Flanges ASME B16.5 Class 300 Offshore Use, Duplex Reducer Tees ASME B16.11 High-Strength Threaded and so on.