DIFF Subgroup
F22B 7/20 Furnace 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 > Component parts thereof; Accessories therefor, e.g. stay-bolt connections > Furnace tubes
No child classifications to compare. This is a leaf node in both IPC and CPC.