Products include high, medium and low pressure flange etc. Material is 20#,A105,Q235A,12CrlMov,16MnR,15CrMo,321,304,304L,316, ... 316 Material is 20#,A105,Q235A,12CrlMov,16MnR,15CrMo,321,304,304L,316 ... to T 40kg/cm2 DN50-4001/2"--24" Steel and forging flange