DIFF Main Group
F22B 23/00 Water-tube boilers built-up from sets of spaced double-walled water tubes of return type in unilateral abutting connection with a boiler drum or with a header box, i.e. built-up from Field water tubes comprising an inner tube arranged within an outer unilaterally-closed tube
Introduced: September 1968
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
Child Classifications
Navigate with arrow keys, Enter to open
- F22B 23/02 the water-tube, i.e. Field-tube, sets being horizontal or substantially horizontal IPC+CPC Available in IPC and CPC
- F22B 23/04 the water-tube, i.e. Field-tube, sets being vertical or substantially vertical IPC+CPC Available in IPC and CPC