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Why vapours of flammable substances pose such a serious hazard?
Wiki User
∙ 13y ago
It is not the flammable liquid that ignites, but the vapors (or vapours for our British cousins) that ignite. Vapor can travel a considerable distance from the liquid to an unforeseen source of ignition, and flash back when ignited. They can fill a large area, with a resulting LARGE fire when ignited. The distinction between flammable and combustible is the "flash point" the temperature at which the liquid gives off an ignitable vapor- flammables have a flash point below 100 degrees F. Many flammable liquid vapors are heavier than air, and can settle into the bilges of a boat, awaiting ignition.
Wiki User
∙ 13y ago
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poisonous, flammable, and corrosive
What is class 4 of the DOT Hazard classification system?
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