A bent hollow item, welded or seamless. It has a round, square or any other cross section, with a continuous periphery. It is primarily designed to convey fluids, gases and/or semisolids. Excludes items of circular cross section which conform in dimensional characteristics to PIPE, METALLIC; ELBOW, PIPE; ELBOW, TUBE; BEND, ELECTRICAL CONDUIT; BEND, PIPE, RETURN; and BEND, TUBE, RETURN. For items with end fittings on one or both ends, see TUBE ASSEMBLY, METAL.