As we covered earlier, for a fire to be able to burn it needs to have three things present simultaneously: Fuel, Ignition, and Oxygen. Take away any one of these and you cannot have a fire. This is known as the ‘Fire Triangle’, and is commonly used to help avoid industrial fires.
With the Class II & III Hazardous Locations, the discussion focuses on the potential for a combustible dust explosion, and two more elements need to be added to the fire triangle to create the
‘Dust Explosion Pentagon’.
The two new elements are
. These elements are created when the fuel, in this case a combustible dust, exists as a dust cloud within a closed area, such as a factory or warehouse. In the same as with the fire triangle, taking away even one of these elements can remove or reduce the risk of a dust explosion.