DIFF Subgroup
F22D 1/24 with fire tubes or flue ways traversing feed-water vessels
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Feed-water heaters, e.g. preheaters > with fire tubes or flue ways traversing feed-water vessels
CPC:
Feed-water heaters, i.e. economisers or like preheaters > with fire tubes or flue ways traversing feed-water vessels
No child classifications to compare. This is a leaf node in both IPC and CPC.