DIFF Main Group
F22B 9/00 Steam boilers of fire-tube type, i.e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body
Introduced: September 1968
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
Child Classifications
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- F22B 9/02 the boiler body being disposed upright, e.g. above the combustion chamber IPC+CPC Available in IPC and CPC
- F22B 9/10 the boiler body being disposed substantially horizontally, e.g. at the side of the combustion chamber IPC+CPC Available in IPC and CPC
- F22B 9/16 the boiler body containing fire tubes disposed crosswise in inclined upward arrangement IPC+CPC Available in IPC and CPC
- F22B 9/18 Component parts thereof; Accessories therefor, e.g. stay-bolt connections IPC+CPC Available in IPC and CPC