built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers

Introduced: September 1968

Full Title

Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically > built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers

CPC subdivides this area 3x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

Child Classifications

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F22B 21/341 +1 CPC CPC only CPC only
F22B 21/346 CPC only CPC only
F22B 21/348 CPC only CPC only
F22B 21/36 involving an upper drum or headers mounted at the top of the combustion chamber +2 CPC IPC+CPC Available in IPC and CPC
F22B 21/38 Component parts thereof, e.g. prefabricated panels IPC+CPC Available in IPC and CPC