... B16.47pressure: 150lb, 300lb, 400lb, 600lb,900lb, 1500lb,2500lbmaterial: ASTM A105, A105N, A350, LF2, LF3, Q235, 20#, 45#, ... , etc.other types of flange: WN flange, blind flange, plate flange, socket weld flange, threaded flange, ring joint flange, etc. OEM to special ... , elbow, tee, cross, reducer, flange, cap, lap joint stub end, steel pipes, socket fittings, etc. standard carbon steel flange