UFL has various meanings in the Electrical category. Discover the full forms, definitions, and usage contexts of UFL in Electrical.
The highest concentration of a vapor or gas (the highest percentage of the substance in air) that will produce a flash of fire when an ignition source (heat, arc, or flame) is present. At concentrations higher than the UFL, the mixture is too rich to burn. Also known as the Upper Explosive Limit (UEL).
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