IPC Subgroup
F22D 1/02 with water tubes arranged in the boiler furnaces, fire tubes or flue ways
Introduced: September 1968
Last revised: January 2006
Full Title
Feed-water heaters, e.g. preheaters > with water tubes arranged in the boiler furnaces, fire tubes or flue ways
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- STEAM GENERATION
- Subclass:
- PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
4 direct subcodes
Child Classifications
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- F22D 1/04 the tubes having plain outer surfaces, e.g. in vertical arrangement
- F22D 1/08 the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces, e.g. in vertical arrangement
- F22D 1/12 Control devices, e.g. for regulating steam temperature
- F22D 1/14 Safety or venting devices