Flanges are the connectors used in process piping to connect pipe to tees, elbows, valves, pumps and whatever other equipment may be necessary. Marerial: 304, 304L, 316, 316L Standard: ASTM, ANSI, JIS, DIN, BS. Pressure grade: 0. 6Mpa -32Mpa We also customize the products according to customers' requirements.