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Explosion Class 2

Definition - What does Explosion Class 2 mean?

An explosion class 2 is a location in which combustible dusts may be present in sufficient quantities, either in suspension, intermittently or periodically, to produce ignitable mixtures.

Safeopedia explains Explosion Class 2

Explosion class 2 is often the result of smoldering dust layers which become stirred up and already have the ignition initiation. Examples of such dusts include: cotton, cellulose, wood resin, paper, coal, peat, cellulose ether, rubber, petroleum coke, polyvinyl acetate, polyvinyl chloride, soot, laminated plastic, sulfer, aluminum, magnesium, manganese and zinc.

It is further sub divided into divisions based on the probability of presence of combustible dusts in the atmosphere. Further divisions define the probability of the presence of combustible dusts.

  • Division 1 - combustible dusts are present continuously, intermittently, or periodically
  • Division 2 - combustible dusts are present only for a short period of time
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