What is ignition range?

Ignition range refers to the range of concentrations of a flammable substance in air that can ignite and sustain combustion. It is defined by two limits: the lower explosive limit (LEL), below which the mixture is too lean to ignite, and the upper explosive limit (UEL), above which it is too rich to ignite. Within this range, a mixture of fuel and air can ignite if an ignition source is present. Understanding the ignition range is crucial for safety in industries handling flammable materials.