Gas cloud explosion

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A gas cloud explosion (VCE) occurs when a larger amount of gas is ignited, usually with containment effects due to obstacles in the combustion path.

Will be a gas cloud , created due to

  • Evaporation of a flammable liquefied gas after a leak
  • Evaporation of a flammable liquid heated above atmospheric boiling point after a leak
  • Release of a flammable gas after a leak
  • Pool formation after pouring out a volatile, flammable liquid,

If ignited by an ignition source, a so-called flash fire usually occurs , in which the cloud burns very quickly, but not fast enough to generate a dangerous pressure wave .

In connection with the term explosion , the rapid combustion of a flammable cloud is referred to as deflagration .


  • SAEFL , implementation of the Hazardous Incident Ordinance: Example of a methodology for determining the risk of a liquid gas tank system , 1996
  • Heinz Koinig: Reference scenarios for Directive 96/82 / EC . Created on behalf of the Federal Ministry for the Environment, Youth and Family. Vienna 1999, 8th gas cloud fire, deflagration, flash fire, p. 45 .

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