of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes (combined low- and high-pressure boilers of forced-flow type F22B33/16)

Full Title

Steam boilers of forced-flow type > of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes (combined low- and high-pressure boilers of forced-flow type F22B33/16)

Child Classifications

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• F22B 29/061
• F22B 29/067
• F22B 29/068
• F22B 29/08 operating with fixed point of final state of complete evaporation
• F22B 29/10 operating with sliding point of final state of complete evaporation
• F22B 29/12 operating with superimposed recirculation during starting and low-load periods, e.g. composite boilers