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Control measure

Substance identification: Flammable vapours

Control measure knowledge

The symbols that may be seen in relation to flammable vapours are:


For detailed information on classification and labelling see Foundation for Hazardous Materials.

Tactical actions

Incident commanders should:
  • Use signs, labels, markings and container types to identify the presence of flammable vapours

  • Use detection equipment to identify and monitor levels of the flammable vapours involved

  • Consider the use of thermal imaging cameras to recognise leaking gas cylinders

  • Identify the flammable vapour and seek specialist advice on the interpretation of its physical properties 

  • Gather information about risks within the vicinity of the vapour cloud