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IPC-Stelle: F22B 37/48 2-Punkt Untergruppe [Version 7 (gültig ab 01.2000), Sprache EN - English]

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Symbol		Titel
A Hierarchieinformationen		HUMAN NECESSITIES
B Hierarchieinformationen		PERFORMING OPERATIONS; TRANSPORTING
C Hierarchieinformationen		CHEMISTRY; METALLURGY
D Hierarchieinformationen		TEXTILES; PAPER
E Hierarchieinformationen		FIXED CONSTRUCTIONS
F Hierarchieinformationen		MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F01 Hierarchieinformationen		ENGINES OR PUMPS
F01 Hierarchieinformationen		MACHINES OR ENGINES IN GENERAL (combustion engines F02; machines for liquids F03 , F04); ENGINE PLANTS IN GENERAL; STEAM ENGINES
F02 Hierarchieinformationen		COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F03 Hierarchieinformationen		MACHINES OR ENGINES FOR LIQUIDS (for liquids and elastic fluids F01; positive-displacement machines for liquids F04); WIND, SPRING, WEIGHT, OR MISCELLANEOUS MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F04 Hierarchieinformationen		POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS (portable fire extinguishers with manually-operated pumps A62C 11/00 , with power-driven pumps A62C 25/00; charging or scavenging combustion engines by pumps F02B; engine fuel-injection pumps F02M; ion pumps H01J 41/12; electrodynamic pumps H02K 44/02)
F15 Hierarchieinformationen		ENGINEERING IN GENERAL
F15 Hierarchieinformationen		FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F16 Hierarchieinformationen		ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F17 Hierarchieinformationen		STORING OR DISTRIBUTING GASES OR LIQUIDS (water supply E03B)
F21 Hierarchieinformationen		LIGHTING; HEATING
F21 Hierarchieinformationen		LIGHTING (electric aspects or elements, see section H, e.g. electric light sources H01J , H01K , H05B)
F22 Hierarchieinformationen		STEAM GENERATION (chemical or physical apparatus for generating gases B01J; chemical generation of gas, e.g. under pressure, Section C; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F23J; generating combustion products of high pressure or high velocity F23R; water heaters not for steam generation F24H , F28; cleaning of internal or external surfaces of heat-transfer conduits, e.g. water tubes of boilers, F28G)
F22B Hierarchieinformationen		METHODS OF STEAM GENERATION; STEAM BOILERS (steam engine plants where engine aspects predominate F01K; 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		General aspects of, or methods for, steam generation
F22B 1/00 Hierarchieinformationen		Methods of steam generation characterised by form of heating method (use of solar heat F24J 2/00; jackets or other cooling means in which steam is generated and which serve for cooling other apparatus, see the subclasses for such apparatus)
F22B 3/00 Hierarchieinformationen		Other methods of steam generation
F22B 5/00		Kinds of steam boilers
F22B 5/00 Hierarchieinformationen		Steam boilers of drum type, i.e. without internal furnace or fire tubes, the boiler body being contacted externally by flue gas
F22B 7/00 Hierarchieinformationen		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
F22B 9/00 Hierarchieinformationen		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
F22B 11/00 Hierarchieinformationen		Steam boilers of combined fire-tube type and water-tube type, i.e. steam boilers of fire-tube type having auxiliary water tubes
F22B 13/00 Hierarchieinformationen		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
F22B 15/00 Hierarchieinformationen		Water-tube boilers of horizontal type, i.e. the water-tube sets being arranged horizontally
F22B 17/00 Hierarchieinformationen		Water-tube boilers of horizontally-inclined type, i.e. the water-tube sets being inclined slightly with respect to the horizontal plane
F22B 19/00 Hierarchieinformationen		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
F22B 21/00 Hierarchieinformationen		Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
F22B 23/00 Hierarchieinformationen		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
F22B 25/00 Hierarchieinformationen		Water-tube boilers built-up from sets of water tubes with internally-arranged flue tubes, or fire tubes, extending through the water tubes
F22B 27/00 Hierarchieinformationen		Instantaneous or flash steam boilers
F22B 29/00 Hierarchieinformationen		Steam boilers of forced-flow type
F22B 31/00 Hierarchieinformationen		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 se F23)
F22B 33/00		Steam-generation plants; Control systems
F22B 33/00 Hierarchieinformationen		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)
F22B 35/00 Hierarchieinformationen		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)
F22B 37/00
F22B 37/00 Hierarchieinformationen		Component parts or details of steam boilers (venting devices F16K 24/00; steam traps or like apparatus F16T)
F22B 37/02 Hierarchieinformationen		. applicable to more than one kind or type of steam boiler
F22B 37/04 Hierarchieinformationen		. . and characterised by material, e.g. use of special steel alloy
F22B 37/06 Hierarchieinformationen		. . Flue or fire tubes; Accessories therefor, e.g. fire-tube inserts
F22B 37/08 Hierarchieinformationen		. . . Fittings preventing burning-off of the tube edges
F22B 37/10 Hierarchieinformationen		. . Water tubes; Accessories therefor (working of metal tubes B21D; pipes in general F16L; repairing leaks in water tubes F16L 55/16 , F28F 11/00; cleaning water tubes of boilers F23J , F28G; baffles, screens, or deflectors formed of water tubes F23M 9/10)
F22B 37/12 Hierarchieinformationen		. . . Forms of water tubes, e.g. of varying cross-section
F22B 37/14 Hierarchieinformationen		. . . Supply mains, e.g. rising mains, down-comers, in connection with water tubes
F22B 37/16 Hierarchieinformationen		. . . Return bends
F22B 37/18 Hierarchieinformationen		. . . Inserts, e.g. for receiving deposits from water
F22B 37/20 Hierarchieinformationen		. . . Supporting arrangements, e.g. for securing water-tube sets (construction of tube walls of furnaces including boiler furnaces F23M 5/08)
F22B 37/22 Hierarchieinformationen		. . Drums; Headers; Accessories therefor (making boilers from sheet metal B21D 51/24; pressure vessels in general F16J 12/00; covers or similar closure members for pressure vessels in general F16J 13/00)
F22B 37/24 Hierarchieinformationen		. . Supporting, suspending, or setting arrangements, e.g. heat shielding (frames, engine beds F16M)
F22B 37/26 Hierarchieinformationen		. . Steam-separating arrangements (vapour-liquid separators, e.g. for drying steam, B01D , B04)
F22B 37/28 Hierarchieinformationen		. . . involving reversal of direction of flow
F22B 37/30 Hierarchieinformationen		. . . using impingement against baffle separators
F22B 37/32 Hierarchieinformationen		. . . using centrifugal force
F22B 37/34 Hierarchieinformationen		. . Adaptations of boilers for promoting water circulation (auxiliary apparatus F22D 7/00)
F22B 37/36 Hierarchieinformationen		. . Arrangements for sheathing or casing boilers
F22B 37/38 Hierarchieinformationen		. . Determining or indicating operating conditions in steam boilers, e.g. monitoring direction or rate of water flow through water tubes (measuring or indicating instruments in general G01)
F22B 37/40 Hierarchieinformationen		. . Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles (in flues or chimneys F23J 13/00)
F22B 37/42 Hierarchieinformationen		. . Applications, arrangements, or dispositions of alarm or automatic safety devices (for feed-water heaters F22D 1/14; alarms responsive to undesired or abnormal conditions G08B)
F22B 37/44 Hierarchieinformationen		. . . of safety valves (safety valves per se F16K)
F22B 37/46 Hierarchieinformationen		. . . responsive to low or high water level, e.g. for checking, suppressing, extinguishing combustion in boilers (fire-fighting, fire extinction in general A62)
F22B 37/47 Hierarchieinformationen		. . . responsive to abnormal temperature, e.g. actuated by fusible plugs (such alarms or devices per se G08B)
F22B 37/48 Hierarchieinformationen		. . Devices or arrangements for removing water, minerals, or sludge from boilers (cleaning water tubes, furnace tubes, or the like of boilers F23J , F28G)
F22B 37/50 Hierarchieinformationen		. . . for draining or expelling water
F22B 37/52 Hierarchieinformationen		. . . Washing-out devices
F22B 37/54 Hierarchieinformationen		. . . De-sludging or blow-down devices
F22B 37/56 Hierarchieinformationen		. . Boiler-cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
F22B 37/58 Hierarchieinformationen		. . Removing tubes from headers or drums; Extracting tools
F22B 37/60 Hierarchieinformationen		. specially adapted for steam boilers of instantaneous or flash type
F22B 37/62 Hierarchieinformationen		. specially adapted for steam boilers of forced-flow type
F22B 37/64 Hierarchieinformationen		. . Mounting of, or supporting arrangements for, tube units (construction of tube walls of furnaces, e.g. boiler furnaces F23M 5/08)
F22B 37/66 Hierarchieinformationen		. . . involving vertically-disposed water tubes
F22B 37/68 Hierarchieinformationen		. . . involving horizontally-disposed water tubes
F22B 37/70 Hierarchieinformationen		. . Arrangements for distributing water into water tubes
F22B 37/72 Hierarchieinformationen		. . . involving injection devices
F22B 37/74 Hierarchieinformationen		. . . Throttling arrangements for tubes or sets of tubes
F22B 37/76 Hierarchieinformationen		. Adaptations or mounting of devices for observing existence or direction of fluid flow (devices per se G01P)
F22B 37/78 Hierarchieinformationen		. Adaptations or mounting of level indicators (level indicators per se G01F)
F22D Hierarchieinformationen		PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; FEED-WATER SUPPLY; CONTROLLING WATER LEVEL; CIRCULATING WATER WITHIN BOILERS (chemical treatment of water, e.g. purification, C02F; enclosed heat-exchange apparatus in general F28D; controlling in general G05)
F22G Hierarchieinformationen		SUPERHEATING OF STEAM (steam-separating arrangements in boilers F22B 37/26)
F23 Hierarchieinformationen		COMBUSTION APPARATUS; COMBUSTION PROCESSES
F24 Hierarchieinformationen		HEATING; RANGES; VENTILATING (protecting plants by heating in gardens, orchards, or forests A01G 13/06; baking ovens and apparatus A21B; cooking devices other than ranges A47J; forging B21J , B21K; specially adapted for vehicles, see the relevant subclasses of classes B60 to B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements or arrangements H05B)
F25 Hierarchieinformationen		REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
F26 Hierarchieinformationen		DRYING
F27 Hierarchieinformationen		FURNACES; KILNS; OVENS; RETORTS (specially adapted for a purpose covered by a single other class and specifically mentioned in that class, see the class in question, e.g. bakery ovens A21B , glass melting furnaces C03B , coke or gas-making apparatus C10B , C10J , apparatus for cracking hydrocarbons C10G , blast furnaces C21B , converters for making steel C21C , furnaces for heat treatment of metal C21D; furnaces for electroslag or arc remelting of metals C22B 9/00; enamelling ovens C23D; combustion apparatus F23; electric heating H05B) [4]
F28 Hierarchieinformationen		HEAT EXCHANGE IN GENERAL (heat-transfer, heat-exchange or heat-storage materials C09K 5/00; arrangement or mounting of heat-exchangers in air-conditioning, air-humidification or ventilation F24F 13/30)
F41 Hierarchieinformationen		WEAPONS; BLASTING
F41 Hierarchieinformationen		WEAPONS
F42 Hierarchieinformationen		AMMUNITION; BLASTING
G Hierarchieinformationen		PHYSICS
H Hierarchieinformationen		ELECTRICITY

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