CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS

**Definition:** This place covers:

Apparatus and methods for removing deposits from surfaces in contact with heat-exchange media.

**Limiting references (this place does not cover):** - Cleaning tubes or pipes in general -> B08B9/02 - Removing incrustation in apparatus for thermal non-catalytic cracking of hydrocarbon oils -> C10G9/12 , C10G9/16 - Non-mechanical removal of metallic material from surfaces -> C23F - Cleaning metallic materials by chemical methods -> C23G - Cleaning engines cooling systems -> F01P11/06 - Devices for removing water, salt, or sludge from boilers -> F22B37/48 - Cleaning combustion chambers -> F23J - Cleaning arrangements for water heaters -> F24H9/00 - Removing ice from heat exchanger -> F28F17/00 - Preventing the formation of deposits or corrosion -> F28F19/00