The Flammable Limits refer to the conditions under which a mixture of a flammable material and air may catch fire or explode. If the percentage of flammable material in the air is between the minimum and maximum limits, the presence of a flame or a source of ignition is likely to lead to rapid combustion or explosion.
The material for which flammable limits are quoted may be a flammable liquid, such as ether or methanol, or a powder or dust such as flour or grain dust.
Flammable limits are also sometimes referred to as explosion limits.
