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A straight, hollow metallic product, welded or seamless, of round cross section and continuous periphery and dimensions conforming to recognized pipe standards including those in applicable Tables 1 through 10, Appendix C, FIIG A004A. It is primarily designed to convey fluids, gases, and/or semisolids. For items designed to join a pipe or pipe fitting to another pipe, tube, hose, or fitting, see ADAPTER (as modified); COUPLING (as modified); or NIPPLE (as modified). Excludes PIPE, BENT (as modified); PIPE, CULVERT, METALLIC; TUBE, METTALIC; SPACER, SLEEVE; METAL BAR (hollow); and items with fittings, except those with couplings or thread protectors.