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.