Definitions for "Flammability"
Keywords:  ignite, combustion, flame, astm, ease
A fuel-air mixture is flammable when combustion can be started by an ignition source. The main fact is the proportions or composition of the fuel-air mixture. A mixture that has less than a critical amount of fuel, known as the Lean or Lower Flammability Limit (LFL), or greater than a critical amount of fuel, known as the rich or Upper Flammability Limit (UFL), will not be flammable. For example, the lean flammability limit for Jet A (aviation kerosene) in air at sea level is a concentration (by volume or partial pressure) of about 0.7%. The rich flammability limit is about 4.8% by volume or partial pressure. Flammability limits are not absolute, but depend on the type and strength of the ignition source. Studies on flammability limits of hydrocarbon fuels have shown that the stronger the source of the ignition stimulus, the leaner the mixture that can be ignited. Flammability limits also depend on the type of atmosphere (for example, limits are much wider in oxygen than in air), the pressure, and the temperature of atmosphere.
This property describes how fast a plastic material will burn when subjected to a particular ASTM test. In this test, a flame is applied to one end of a strip of material. When the material starts burning the flame is removed and the time to consume a given amount of material is measured. Units - inches per minute (in/min.). Higher numbers indicate that the material will burn faster under conditions of this particular test. S.E. means self extinguishing. If a material is classified as S.E., the specimen stops burning when the flame is taken away.
Measures char damage length, afterflame and afterglow time on a 3" x 12" fabric sample exposed to flame at its lower edge for 12 seconds.
Keywords:  inflammability, quality
The quality of being flammable; inflammability.