F28G CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OF BOILERS
Introduced: September 1968
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- HEAT EXCHANGE IN GENERAL
- Subclass:
- CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OF BOILERS
Description
F28G covers apparatus and methods for removing fouling, scale, deposits, and other contaminants from the interior or exterior surfaces of heat-exchange conduits, including boiler tubes, pipes, and similar thermal transfer systems. This classification encompasses mechanical cleaning devices (brushes, scrapers, sponge balls), chemical cleaning processes, and combined approaches designed to maintain heat transfer efficiency and system integrity. It applies to both in-service cleaning operations and maintenance procedures for industrial heat exchangers, steam generators, and related equipment. Adjacent classes F28D (heat exchangers) and F22B (steam generation) address the heat-exchange devices themselves, while F28G focuses specifically on their cleaning and surface maintenance.
Related Keywords
8 direct subcodes
Child Classifications
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- F28G 1/00 Non-rotary, e.g. reciprocated, appliances
- F28G 11/00 Cleaning by combustion processes, e.g. using squibs, using travelling burners
- F28G 13/00 Appliances or processes not covered by groups; Combinations of appliances or processes covered by groups
- F28G 15/00 Details
- F28G 3/00 Rotary appliances
- F28G 5/00 Cleaning by distortion
- F28G 7/00 Cleaning by vibration
- F28G 9/00 Cleaning by flushing or washing, e.g. with chemical solvents