Electrically-powered steam cleaning device comprising a hose and nozzle and a vapor-producing chamber that is attached to a water source; Steam cleaning machine parts, namely, suction nozzles, brushes, hoses; Machine parts that heat and maintain temperature in machine piping systems, namely, steam jacketing, electrical tracing, and insulation sold as integral components of finished machines; Power-operated cleaning machines, namely, lances designed to mechanically remove scale and sludge from secondary side tubesheets in steam generators in nuclear power plants; Steam cleaning machines; Steam mops; Electric steam mops; Steam engine boilers; Steam cleaners for household purposes; Multi-purpose steam cleaners; Cleaning appliances utilizing steam; Electric steam mops for household purposes