Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body

Introduced: September 1968

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

Child Classifications

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F22B 7/02 without auxiliary water tubes IPC+CPC Available in IPC and CPC
F22B 7/04 with auxiliary water tubes IPC+CPC Available in IPC and CPC
F22B 7/12 with auxiliary fire tubes; Arrangement of header boxes providing for return diversion of flue gas flow IPC+CPC Available in IPC and CPC
F22B 7/14 with both auxiliary water tubes and auxiliary fire tubes IPC+CPC Available in IPC and CPC
F22B 7/16 Component parts thereof; Accessories therefor, e.g. stay-bolt connections IPC+CPC Available in IPC and CPC