metal pipes, namely, vacuum jacketed pipes used for the transfer of cryogenic liquids from storage tanks to points-of-use; non-insulated, insulated and vacuum insulated metal products for storing and dispensing gases, and gaseous and liquid cryogens, namely, metal pipes manually operated metal control valves, manually operated metal regulating valves, valve boxes made of metal, pump boxes made of metal, hoses and connectors made of metal for the transfer of fluids, metal tanks for compressed gas of liquids sold empty, pressure vessels namely metal tanks and receptacles for storing gases and liquefied gases at ambient temperature and pressure or elevated temperature and pressure, metal transfer conduits and fittings for use with liquefied oxygen, nitrogen, argon, helium, hydrogen and carbon dioxide, coated and uncoated fittings of metal for use with gas and liquefied gas transfer, namely flanges, pigtails, bayonet connectors, metal piping distribution manifolds with flow control of equipment consisting of, manually operated metal valves flow meters, flow regulators, flow regulating valves together with piping and pressure and flow control indicators, for gaseous and liquefied gas transfer; metal connectors, namely, spigots for receiving and dispensing the gas and liquefied gas into receptacles; piping and related flow control equipment, namely valves, flow meters, flow regulators valves, together with temperature, pressure and flow indicating devices, for dispensing gases inside a commercial or medical facility; metal cylinders for compressed gas or liquids, sold empty

Cryogenic vaporizers; cryogenic processing equipment sold as a unit for separation of air into component parts by liquefaction and distillation, consisting of compressors and expanders for liquefying gases by pressurization followed by expansion, distillation columns to separate the liquid gas into component parts, flash tanks for further separation of retained gaseous components from liquid gaseous fractions, associated piping to conduct gases and liquids throughout the processing equipment together with temperature, pressure and flow indicators associated with the piping and compressors and expanders; non-cryogenic processing equipment sold as a unit for separation of air by pressure swing adsorption processes, consisting of, compressors for pressurizing the air, pressure vessels with adsorbent media for effecting separation of air into component parts, piping to conduct gases through the processing equipment, together with temperature pressure and flow indicators devices associated with the piping compressors and pressure vessels