What is the UEL and LEL in oil and Gas sector?

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UEL and LEL are Upper and Lower Explosive Limits respectively, used to define the range of flammable gas concentration in air.

UEL is the maximum concentration of a gas in air that can produce an explosion when an ignition source is present.
LEL is the minimum concentration of a gas in air that can produce an explosion when an ignition source is present.
In the oil and gas sector, UEL and LEL are important for safety as they help to identify the potential for explosions and fires.
For example, if the concentration of a flammable gas is below the LEL, it is too lean to ignite, while if it is above the UEL, it is too rich to ignite.
Monitoring and controlling gas concentrations within the UEL and LEL range is critical to prevent accidents and ensure safe operations.

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