WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

F28G　CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS (cleaning pipes or tubes in general B08B 9/02; devices or arrangements for removing water, minerals, or sludge from boilers while the boiler is in operation, or which remain in position while the boiler is in operation, or are specifically adapted to boilers without any other utility F22B 37/48; removal or treatment of combustion products or combustion residues F23J; removing ice from heat-exchange apparatus F28F 17/00)

F28G 1/00 Non-rotary, e.g. reciprocated, appliances (F28G 3/00 takes precedence)

F28G 1/02 ・having brushes ({F28G 1/12 takes precedence;} brushes A46B)

F28G 1/04 ・having articulated tools, e.g. assembled in chain manner

F28G 1/06 ・having coiled wire tools, i.e. basket type

F28G 1/08 ・having scrapers, hammers, or cutters, e.g. rigidly mounted

F28G 1/10 ・・resiliently mounted

F28G 1/12 ・Fluid-propelled scrapers, bullets, or like solid bodies

F28G 1/125 ・・{forced back and forth by means of flow reversal}

F28G 1/14 ・Pull-through rods

F28G 1/16 ・using jets of fluid for removing debris (F28G 1/12 takes precedence)

F28G 1/163 ・・{from internal surfaces of heat exchange conduits}

F28G 1/166 ・・{from external surfaces of heat exchange conduits}

F28G 3/00 Rotary appliances

F28G 3/02 ・having abrasive tools

F28G 3/04 ・having brushes (brushes A46B)

F28G 3/06 ・having articulated tools, e.g. assembled in chain manner

F28G 3/08 ・having coiled wire tools, i.e. basket type

F28G 3/10 ・having scrapers, hammers, or cutters, e.g. rigidly mounted

F28G 3/12 ・・resiliently mounted

F28G 3/14 ・・thrown into working position by centrifugal force

F28G 3/16 ・using jets of fluid for removing debris

F28G 3/163 ・・{from internal surfaces of heat exchange conduits}

F28G 3/166 ・・{from external surfaces of heat exchange conduits}

F28G 5/00 Cleaning by distortion (by vibration F28G 7/00)

F28G 7/00 Cleaning by vibration {or pressure waves}

F28G 7/005 ・{by explosions or detonations; by pressure waves generated by combustion processes}

F28G 9/00 Cleaning by flushing or washing, e.g. with chemical solvents (appliances using jets of fluid for removing debris F28G 1/16, F28G 3/16)

F28G 9/005 ・{of regenerative heat exchanger}

F28G 11/00 Cleaning by combustion, e.g. using squibs, using travelling burners {(F28G 7/005 takes precedence)}

F28G 13/00 Appliances or processes not covered by groups F28G 1/00 to F28G 11/00; Combinations of appliances or processes covered by groups F28G 1/00 to F28G 11/00

F28G 13/005 ・{cleaning by increasing the temperature of heat exchange surfaces (F28G 7/005, F28G 11/00 take precedence)}

F28G 15/00 Details (measuring thickness of deposit G01B)

F28G 15/003 ・{Control arrangements}

F28G 15/02 ・Supports for cleaning appliances, e.g. frames

F28G 15/04 ・Feeding and driving arrangements, e.g. power operation

F28G 15/06 ・・Automatic reversing devices

F28G 15/08 ・Locating position of cleaning appliances within conduits

F28G 15/10 ・Masks for delimiting area to be cleaned

F28G 2015/00 Details (measuring thickness of deposit G01B)

F28G 2015/006 ・Arrangements for processing a cleaning fluid after use, e.g. filtering and recycling