... ,2500lbmaterial: ASTM A105, A105N, A350, LF2, LF3, Q235, 20#, 45#, 20Mn. 16Mn,Q345, etc.face: RF, FFsurface treatment ... construction, etc.other types of flange: WN flange, blind flange, plate flange, socket weld flange, threaded flange, ring joint flange, etc. OEM to special requirement ... fittings: steel pipes, elbow, tee, cross, reducer, flange, cap, lap joint stub end, steel pipes, socket fittings ...