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PCE
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DIFF Subgroup
F22B 7/04

with auxiliary water tubes

Introduced: September 1968

Full Title

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 > with auxiliary water tubes

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • F22B 7/06 inside the furnace tube in transverse arrangements IPC+CPC Available in IPC and CPC
  • F22B 7/08 inside the furnace tube in longitudinal arrangement IPC+CPC Available in IPC and CPC
  • F22B 7/10 outside the boiler body IPC+CPC Available in IPC and CPC