... : black painting, anti-rust varnish, anti-rust oil,hot-galvanized, cold-galvanized, 3PE coating, epoxy coating, etc.package: plywood caseuse: ... of flange: WN flange, blind flange, plate flange, socket weld flange, threaded flange, ring joint flange, etc. OEM to special ... pipes, elbow, tee, cross, reducer, flange, cap, lap joint stub end, steel pipes, socket fittings, etc. standard carbon steel flange