IPC Subgroup
F22B 35/02 for steam boilers with natural convection circulation
Introduced: September 1968
Last revised: January 2006
Full Title
Control systems for steam boilers > for steam boilers with natural convection circulation
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- STEAM GENERATION
- Subclass:
- METHODS OF STEAM GENERATION; STEAM BOILERS
1 direct subcode
Child Classifications
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- F22B 35/04 during starting-up periods, i.e. during the periods between the lighting of the furnaces and the attainment of the normal operating temperature of the steam boilers