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Liquid hammer in industrial ammonia systems.

Author(s) : HAUKÅS H. T.

Summary

Instantaneous stop of liquid flowing at high velocity, e.g. against a closed valve, is designated liquid hammer, after the hammering sound from the impact. The energy released may in severe cases cause damage to the pipe system, e.g. disrupt a valve. Therefore, liquid hammer is a possible cause of serious accidents. The paper presents two practical cases where industrial ammonia refrigeration systems suffered from strong liquid hammer. In one system, the problems were related to the wet return line, while in the other case the hammering occurred in the liquid feed line. In both cases the mechanical impact on the systems was very strong, with obvious risks of damage to piping and components and possible ammonia release. A brief, general discussion of potential causes and consequences of liquid hammer is given, together with a more detailed presentation of the cases mentioned above and how the problems were solved.

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Pages: 2007-2

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Details

  • Original title: Liquid hammer in industrial ammonia systems.
  • Record ID : 2007-2076
  • Languages: English
  • Source: Ammonia Refrigeration Technology for Today and Tomorrow.
  • Publication date: 2007/04/19

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