The temperature at which a liquid will produce its lower explosive limit in air.

Furthermore, vapours can build up and exceed the lower explosive limit for the gas.

Work also cannot continue if the concentration of a material reaches or exceeds 10% of its lower explosive limit.

If concentrations levels of the hazardous materials are not below 20% of the lower explosive limit, clean the container again.

Lower explosive limit in air (% by volume)

At levels of 1100 ppm, 10% of the lower explosive limit, petroleum naphtha is immediately dangerous to life and health.

Such properties include flame temperature, minimum ignition energy, upper and lower explosive limits, and molecular weight.

Flammable Range Any level between the upper and lower explosive limits,where the material can easily ignite or explode with a source of ignition.

Many ignitable liquids have high vapor pressures, low flash points and a relatively wide range between their upper and lower explosive limit.

Below a certain value, the lower explosive limit (LEL), there is simply insufficient dust to support the combustion at the rate required for an explosion.

The modeling results indicate that the Lower Explosive Limit for CH4 would be exceeded up to a distance of 490 m from the source.

Lower Explosive Limit (LEL) – the lowest concentration at which the gas can ignite.

Once the lower explosive limit (LEL) is reached, any source of ignition will cause an explosion of the vapors.

When a percentage of the lower explosive limit (LEL) of an atmosphere is exceeded, an alarm signal on the instrument is activated.

If particulate spray is present it will also have a Lower Explosive Limit which is not dependent on the flash point of any solvent mixture present.

A soil gas survey is usually conducted using a hand-held device that can give instant readings on the percentage lower explosive limit (LEL) at a specific location.

Since several types of secondary batteries give off hydrogen and oxygen if overcharged, ventilation of a battery room is critical to maintain the concentration below the lower explosive limit.

Excessive constituent levels in soil could also potentially result in the generation of vapors in the desorber at concentrations exceeding the lower explosive limit (LEL).

The primary advantage of the FBC over traditional rotor concentrators lies in its ability to achieve any concentration ratio up to the lower explosive limit (LEL).

Ordinarily, vapor concentrations in the area of this filling operation are below the lower explosive limit (LEL) of the product being dispensed, so the static discharge causes no problem.

For gases, vapors, or mists, the minimum acceptable value is 10 % of the LFL (sometimes expressed in terms of the Lower Explosive Limit (LEL)).

The modeling results indicate that the Lower Explosive Limit for CH4 (the only critical level that has been established for this parameter) would not be exceeded in this scenario.

The ventilation arrangements for the enclosure must ensure that the gas is dispersed rapidly and that region where the air/fuel concentration is above the lower explosive limit is as small as possible..

Unclassified locations on chemical and other plant are present where it is absolutely certain that the hazardous gas is diluted to a concentration below 25% of its lower flammability limit (or lower explosive limit (LEL)).

Lower explosive limits for many organic materials are in the range of 10-50 g/m3, which is much higher than the limits set for health reasons, as is the case for the LEL of many gases and vapours.