VM12

Chromium alloyed steel; metal pipes and tubes of all sizes; metal manifolds; metal pipework; sheet metal; metal forgings; metal pressure vessels for containing fluids; manually or power operated metal valves; all the foregoing for use in power generation plants and industrial furnaces and designed to withstand extremely high temperatures and pressures without loss of structural integrity

Machine parts, namely, boiler tubes and steam manifolds; components for steam and gas turbines not for land, sea or air vehicles, namely, casings rotor shafts, stator and rotor blades, and supports for blades

Components of boilers, steam generators, and heat exchangers not being machine parts, namely, waterwall panels and tubes used therewith, superheaters and tubes used therewith, reheaters and tubes used therewith, drums, steam separators, steam headers, steam manifolds, steam pipeworks, tube bundles, tube sheets, and metal covering for heat exchanger and steam generator shells