F22B21/04 - CPC Classification Index

ClassID:

155509 ⎘

F22B21/04 - CPC Classification

Classification description:

Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving a single upper drum and a single lower drum, e.g. the drums being arranged transversely

Sub-classes:

F22B21/06 » the water tubes being arranged annularly in sets, e.g. in abutting connection with drums of annular shape 3
F22B21/08 » the water tubes being arranged sectionally in groups or in banks, e.g. bent over at their ends 2
F22B21/10 » the water tubes being arranged in staggered rows 1

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