This area of the car absorbs the force of impact by acting as a weak point, designed to take the damage so the rest of the car doesn’t. Most cars built today have a “crumple zone”. Designed to rupture when pressure builds, the vent provides the easiest escape route for the gasses and flames. Injury to people and damage to property may result.īy using the appropriate dust collector explosion venting that meets NFPA 68 standards, that pressure has a safe exit. With no escape, the pressure will create its own path to vent. In a dust collector without proper explosion relief venting, fuel burning in the closed space will create a rapid increase in pressure.
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With all five elements of the pentagon met, the dust collector becomes an enclosed space full of oxygen and fuel. That enclosed space creates the biggest danger in combustible dust collection. Finally, to make it a true explosion, the dust cloud is inside an enclosed space. Then a spark, electrical component, or overheated piece of equipment can provide the ignition. Next, assuming the dust collector has air inside it, the fire has oxygen. Then, if that dust disperses in air, as it would in a dust collector, it is much more explosive. A dust collector is a perfect place for all five of these things to happen.įirst of all, if you have combustible dust, you have fuel for a fire. Why do dust collectors in particular need explosion venting?įor an explosion to occur, the five elements of the dust explosion pentagon must be met. Also, the vent design must not result in pieces of material being flung into the neighbor’s office building in the event of an explosion. In other words, the force of the deflagration or explosion needs to vent away from people or things that it could damage. Direct projectile materials away from potential damage.Avoid ignition of nearby items or property.Limit damage to the enclosure by venting pressure.Secondly, the venting must prevent property from damage: Make sure that materials that are health hazards vent outside.Direct venting away from the presence of people in the area.Prevent structural failure that causes harm to people in the area.Firstly, the explosion or deflagration venting must protect people from harm:
NFPA 68 specifies what explosion venting must do to meet standards. What NFPA 68 Says About Explosion Venting for Dust Collectors Then, with no safe outlet, the growing pressure can damage the dust collector or even the entire facility. Without explosion relief venting, a dust collector fire can cause a rapid increase in pressure inside the enclosed space. Dust collector explosion venting, also called deflagration venting, allows pressure to safely escape during a fire. NFPA 68, the Standard on Explosion Protection by Deflagration Venting, lays out these guidelines. According to NFPA standards, explosion venting is a key part of dust collector safety.
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