Dynamic behaviour of direct spring loaded pressure relief valves connected to inlet piping: IV review and recommendations

C.J. Hős, A.R. Champneys, K. Paul, M. McNeely

Research output: Contribution to journalArticle (Academic Journal)peer-review

12 Citations (Scopus)
516 Downloads (Pure)

Abstract

Abstract Recent progress by a number of different groups and authors is reviewed on the stability properties of direct-spring pressure relief valves connected to pressure vessels with or without piping systems. Various different notions of stability and mechanisms for instability are revealed both in the case of gas and liquid service. It is stressed that it is not the valve itself that is stable or unstable, rather the harmful vibrations arise through interactions between the valve and its surroundings — the inlet piping, the reservoir, and any outlet piping. A distinction is drawn between underlying instability mechanisms and how these may be triggered during transient operations. The purpose of the work is to provide a coherent simplified account that will be of practical use for proposing new operational guidelines and mitigation strategies. Among these various mechanisms, oscillatory instability due to the interaction with a quarter-wave acoustic mode in the inlet piping is argued to be the most important to mitigate.
Original languageEnglish
JournalJournal of Loss Prevention in the Process Industries
Early online date10 May 2017
DOIs
Publication statusE-pub ahead of print - 10 May 2017

Keywords

  • Pressure-relief valve
  • Instability
  • Acoustic waves
  • Piping systems
  • Quarter-wave
  • Operational guidelines

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