F22B METHODS OF STEAM GENERATION; STEAM BOILERS
Introduced: September 1968
Description
F22B covers methods and apparatus for generating steam in boilers, including design, construction, and operational techniques for steam-generating systems. This subclass encompasses various boiler types (fire-tube, water-tube, etc.), combustion chamber arrangements, heat transfer mechanisms, and fuel feeding systems used to convert water into steam for power generation, heating, or industrial processes. It includes innovations in boiler efficiency, safety devices, water treatment, and control systems, but excludes the prime movers (engines) that utilize the generated steam, which are classified elsewhere. Related steam-using applications and nuclear reactor cooling systems fall under different classifications.
IPC and CPC are identically structured here. All 19 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F22B 1/00 Methods of steam generation characterised by form of heating method +2 CPC IPC+CPC Available in IPC and CPC
- 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 IPC+CPC Available in IPC and CPC
- F22B 13/00 Steam boilers of fire-box type, i.e. boilers where both combustion chambers and subsequent flues or fire tubes are arranged within the boiler body +1 CPC IPC+CPC Available in IPC and CPC
- F22B 15/00 Water-tube boilers of horizontal type, i.e. the water-tube sets being arranged horizontally IPC+CPC Available in IPC and CPC
- 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 IPC+CPC Available in IPC and CPC
- 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 IPC+CPC Available in IPC and CPC
- F22B 21/00 Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically +3 CPC IPC+CPC Available in IPC and CPC
- F22B 23/00 Water-tube boilers built-up from sets of spaced double-walled water tubes of return type in unilateral 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 IPC+CPC Available in IPC and CPC
- 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 IPC+CPC Available in IPC and CPC
- F22B 3/00 Other methods of steam generation; Steam boilers not provided for in other groups of this subclass IPC+CPC Available in IPC and CPC
- F22B 31/00 Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus +1 CPC IPC+CPC Available in IPC and CPC
- F22B 33/00 Steam-generation plants, e.g. comprising steam boilers of different types in mutual association IPC+CPC Available in IPC and CPC
- F22B 35/00 Control systems for steam boilers (for regulating feed-water supply F22D5/00; for controlling superheat temperature F22G5/00) +6 CPC IPC+CPC Available in IPC and CPC
- 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 CPC IPC+CPC Available in IPC and CPC
- 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 IPC+CPC Available in IPC and CPC
- 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 IPC+CPC Available in IPC and CPC