Flanges, Pipe Fittings, Valves manufacturer / supplier in China, offering High Quality/Large Diameter/High Pressure/Steel Pipes/ERW Welded Pipe Fittings/Stainless Steel/304/316L/201/321/Tube Seamless/Round/Squard/Construction/Oil Pipe, SS304/SS316L Industry Standard and Non-Standard Welding Neck Flange for Valve Actuator Parts, Stainless Steel High Pressure ANSI B16.5 Anti-Corrosion Weld Neck Flange for Semiconductor and so on.