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IEVref:426-02-10ID:
Language:enStatus: Standard
Term: upper flammable limit
Synonym1: UFL
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Definition: concentration of flammable gas or vapour in air, above which an explosive gas atmosphere does not form

Note 1 to entry: For the purposes of Ex Equipment, this was previously referred to as the upper explosive limit (UEL).

Note 2 to entry: The concentration can be expressed as either a volume fraction or a mass per unit volume.


Publication date:2020-03
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