Flammability limits

Asked by Normandy 7 years, 6 months ago | 1 Answers

What are the various flammability limits with their defination?

1 Answer

RichS29 7 years, 6 months ago
Vapor-air mixtures will ignite and burn only over a well-specified range of compositions. The mixture will not burn when the composition is lower than the lower flammable limit (LFL); the mixture is too lean for combustion. The mixture is also not combustible when the composition is too rich; that is, when it is above the upper flammable limit (UFL). A mixture is flammable only when the composition is between the LFL and the UFL. Commonly used units are volume percent fuel (percentage of fuel plus air). Lower explosion limit (LEL) and upper explosion limit (UEL) are used interchangeably with LFL and UFL. I have added key Hydrocarbon flammability limits as a question as well.

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