Fire and Explosion Protection for the Combustible Dust Processing Industries. A spark by itself is not dangerous. For a fire or explosion to occur, there must be three essential ingredients - a combustible material, oxygen, and an ignition source. If one of these three is eliminated, then so is the potential for fire or explosion.In today's production plants, we often have to cope with all of the components that lead to a fire or cause an explosion. Dust/fume extraction systems and pneumatic conveyors increase the danger of fire. Once sparks or glowing embers are created, the pneumatic...