... , gas, chemical, metallurgy, electric station, shipbuilding, construction, etc.flanges:WN flange, blind flange, plate flange, socket weld ... ring joint flange, etc. OEM to special requirement. pipe & fittings:steel pipes, elbow, tee, cross, reducer, flange, cap, lap ... joint stub end, steel pipes, socket fittings, etc. stainless steel concentric ...