METAL PIPE; METAL FITTINGS, FLANGES, COUPLINGS AND CONNECTORS FOR PIPES, TANKS, TUBES, CONDUITS AND CYLINDERS; METAL OUTLETS FOR PIPES, TANKS, TUBES, CONDUITS AND CYLINDERS AND PARTS THEREOF; METAL UNIONS FOR PIPES, TANKS, TUBES, CONDUITS AND CYLINDERS; MANUALLY OPERATED METAL VALVES BEING OTHER THAN MACHINE PARTS