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IPC entry: F22B 1/28 1-dot subgroup [Version 2024.01 (current), Language EN - English]

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Symbol		Title
A		HUMAN NECESSITIES
B		PERFORMING OPERATIONS; TRANSPORTING
C		CHEMISTRY; METALLURGY
D		TEXTILES; PAPER
E		FIXED CONSTRUCTIONS
F		MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F01		ENGINES OR PUMPS
F01		MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
F02		COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F03		MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F04		POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F15		ENGINEERING IN GENERAL
F15		FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F16		ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F17		STORING OR DISTRIBUTING GASES OR LIQUIDS
F21		LIGHTING; HEATING
F21		LIGHTING
F22		STEAM GENERATION
F22B		METHODS OF STEAM GENERATION; STEAM BOILERS (steam engine plants where engine aspects predominate F01K; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F23J 3/00; domestic central-heating systems using steam F24D; heat exchange or heat transfer in general F28; generation of vapour in the cores of nuclear reactors G21)
F22B 1/00		Methods of steam generation characterised by form of heating method (use of solar heat F24S; jackets or other cooling means in which steam is generated and which serve for cooling other apparatus, see the subclasses for such apparatus) [1, 2006.01]
F22B 1/02		. by exploitation of the heat content of hot heat carriers [1, 2006.01]
F22B 1/04		. . the heat carrier being hot slag, hot residues, or heated blocks, e.g. iron blocks [1, 2006.01]
F22B 1/06		. . the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium [1, 2006.01]
F22B 1/08		. . the heat carrier being steam [1, 2006.01]
F22B 1/10		. . . released from heat accumulators [1, 2006.01]
F22B 1/12		. . . produced by an indirect cyclic process [1, 2006.01]
F22B 1/14		. . . coming in direct contact with water in bulk or in sprays [1, 2006.01]
F22B 1/16		. . the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour [1, 2006.01]
F22B 1/18		. . the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines (use of waste heat of combustion engines, in general, F02) [1, 2006.01]
F22B 1/20		. using heat evolved in a solution absorbing steam; Soda steam boilers [1, 2006.01]
F22B 1/22		. using combustion under pressure substantially exceeding atmospheric pressure [1, 2006.01]
F22B 1/24		. . Pressure-fired steam boilers, e.g. using turbo air compressors actuated by hot gases from boiler furnace [1, 2006.01]
F22B 1/26		. . Steam boilers of submerged-flame type, i.e. the flame being surrounded by, or impinging on, the water to be vaporised [1, 2006.01]
F22B 1/28		. in boilers heated electrically [1, 2006.01]
F22B 1/30		. . Electrode boilers [1, 2006.01]
F22B 3/00		Other methods of steam generation; Steam boilers not provided for in other groups of this subclass [1, 2006.01]
F22B 5/00		Steam boilers of drum type, i.e. without internal furnace or fire tubes, the boiler body being contacted externally by flue gas [1, 2006.01]
F22B 7/00		Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body [1, 2006.01]
F22B 9/00		Steam boilers of fire-tube type, i.e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body [1, 2006.01]
F22B 11/00		Steam boilers of combined fire-tube type and water-tube type, i.e. steam boilers of fire-tube type having auxiliary water tubes [1, 2006.01]
F22B 13/00		Steam boilers of fire-box type, i.e. the combustion of fuel being performed in a chamber or fire-box with subsequent flue(s) or fire tube(s), both chamber or fire-box and flues or fire tubes being built-in in the boiler body [1, 2006.01]
F22B 15/00		Water-tube boilers of horizontal type, i.e. the water-tube sets being arranged horizontally [1, 2006.01]
F22B 17/00		Water-tube boilers of horizontally-inclined type, i.e. the water-tube sets being inclined slightly with respect to the horizontal plane [1, 2006.01]
F22B 19/00		Water-tube boilers of combined horizontally-inclined type and vertical type, i.e. water-tube boilers of horizontally-inclined type having auxiliary water-tube sets in vertical or substantially-vertical arrangement [1, 2006.01]
F22B 21/00		Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically [1, 2006.01]
F22B 23/00		Water-tube boilers built-up from sets of spaced double-walled water tubes of return type in unilaterial abutting connection with a boiler drum or with a header box, i.e. built-up from Field water tubes comprising an inner tube arranged within an outer unilaterally-closed tube [1, 2006.01]
F22B 25/00		Water-tube boilers built-up from sets of water tubes with internally-arranged flue tubes, or fire tubes, extending through the water tubes [1, 2006.01]
F22B 27/00		Instantaneous or flash steam boilers [1, 2006.01]
F22B 29/00		Steam boilers of forced-flow type [1, 2006.01]
F22B 31/00		Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus (steam generation characterised by heating method F22B 1/00; combustion apparatus per seF23) [1, 2006.01]
F22B 33/00		Steam-generation plants; Control systems
F22B 33/00		Steam-generation plants, e.g. comprising steam boilers of different types in mutual association (arrangements or dispositions of steam-generation plants in marine vessels B63H 21/00) [1, 2006.01]
F22B 35/00		Control systems for steam boilers (regulation or control of steam power plants F01K 7/00; for regulating feed-water supply F22D; for controlling superheat temperature F22G 5/00; control of combustion F23N) [1, 2006.01]
F22B 37/00
F22B 37/00		Component parts or details of steam boilers (venting devices F16K 24/00; steam traps or like apparatus F16T) [1, 2006.01]
F22D		PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
F22G		SUPERHEATING OF STEAM (steam-separating arrangements in boilers F22B 37/26; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F23J 3/00)
F23		COMBUSTION APPARATUS; COMBUSTION PROCESSES
F24		HEATING; RANGES; VENTILATING
F25		REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
F26		DRYING
F27		FURNACES; KILNS, OVENS OR RETORTS [4]
F28		HEAT EXCHANGE IN GENERAL
F41		WEAPONS; BLASTING
F41		WEAPONS
F42		AMMUNITION; BLASTING
F99		SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
G		PHYSICS
H		ELECTRICITY

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