The lowest (lower limit) and highest (upper limit) concentrations of a specific gas or vapor in mixture with air that can be ignited at ordinary temperature and pressure of the mixture. Also called COMBUSTIBLE LIMITS or FLAMMABLE LIMITS.
The amounts of vapor in air which form explosive mixtures. Explosive limits are expressed as "lower explosive limits" and "upper explosive limits;" these give the range of vapor concentrations in air that will explode if heat is added. Explosive limits are expressed as percent of vapor in air.
The range of concentrations (% by volume in air) of a flammable gas or vapor that can result in an explosion from ignition in a confined space. Usually given as Upper and Lower Explosive Limits (see UEL and LEL).
a.k.a. Flammable Limits. The ratio of the concentration of fuel and air, which will support combustion once ignited. Most common substances have a lower limit (too lean of a mixture) and an upper limit (too rich of a mixture) to support combustion. The range between these limits supports combustion and is therefore within it's Explosive or Flammable Limits
When vapors of a flammable solvent are mixed with air in the right proportions, they will explode if ignited. Very low or very high concentrations cannot explode. Explosive limits define these proportions (percentage of vapor in air). The LEL and UEL are the Lower and Upper Explosive Limits. Solvent PELs are usually given in ppm units (parts per million), while explosive limits are in percent (parts per hundred).
the limits beyond which, the vapour and air mixture cannot be ignited; these limits are known as lower explosive limit and upper explosive limit; the flammable range of petroleum products may be considered as between 1% to 10% per volume of the atmosphere
The range of concentration of a flammable gas or vapour (percent by volume in air) in which explosion can occur if an ignition source is present
The amounts of vapor in the air that form explosive mixtures; limits are expressed as lower and upper limits and give the range of vapor concentrations in air that will explode if an ignition source is present.
Amount of vapor in the air which forms an explosive mixture. Lower and upper explosive limits are the range of vapor concentration in the air which will explode if heated.
The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.
the lower explosive ( flammable) limit ( LEL) is the lowest concentration of vapour in air which will burn or explode upon contact with a source of ignition. The upper explosive (flammable) limit ( UEL) is the highest concentration of vapour in air which will burn or explode upon contact with a source of ignition.
Same as Flammable Limits.
A range of the ratio of solvent vapor to air in which the mixture will explode if ignited; below the lower or above the higher explosive limit, the mixture is too lean or too rich to explode; the critical ratio runs from about one to twelve percent of solvent vapor by volume at atmospheric pressure.
