About Fires: Three Classes of Fire

Class B

  • Class B fires involve flammable liquids including chemicals and grease.
  • Class B fires can be extinguished by using a carbon dioxide (CO2) extinguisher or an all purpose dry chemical extinguisher (ABC).
  • Never use water on a Class B fire since this will only increase the hazard.
  • Use care in extinguishing a Class B fire as this type of fire can flash back and reignite after being extinguished.

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