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An initial explosion can dislodge more accumulated combustible dust into the air. If it ignites, this dust can cause additional explosions, called secondary explosions. Secondary explosions can be even more destructive due to the increased amount of dust. (More information available in OSHA’s Hazard Alert).
Enclosed conveyor belt with dust built up on the inside:
Primary explosion from the motor sparking creates a dust cloud inside the enclosure:
Dust cloud ignites causing a much larger secondary explosion:
Learn more about combustible dust and making the safe choice for your facility with our Interactive Guide.
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