F22B21/08 - CPC Classification

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 the water tubes being arranged sectionally in groups or in banks, e.g. bent over at their ends

• F22B21/081 » {involving a combustion chamber, placed at the side and built-up from water tubes} 4
• F22B21/083 » {involving an upper drum and a lower drum and a fire-place between the two drums} 1
• F22B21/085 » {the tubes being placed in layers} 1
• F22B21/086 » {Frames built-up from water tubes} 1
• F22B21/088 » {involving an upper drum and a lower drum and two lateral drums} 0

Recent Application in this class: