Seamless Steel Pipe, Flange, Valve manufacturer / supplier in China, offering ASME B16.5 Stainless Steel Butt Weld Flange - Durable Design, ANSI Class 600 Butt Weld Flange - High Performance Sealing, ASME B16.5 Butt Weld Flange - High Pressure Class 150/300 and so on.