What is the lower flammability limit of propane vapor?

The lower flammability limit (LFL) of propane vapor is the minimum concentration of propane in the air that can ignite and cause combustion. For propane, this limit is typically around 2.15% by volume in air. This means that when the concentration of propane vapor in the air falls below this percentage, it will not ignite, even if a source of ignition is present.

Understanding the significance of the lower flammability limit is crucial for safety in environments where propane is used. It helps in designing ventilation systems and determining safe operating conditions. Knowledge of these limits assists in preventing dangerous situations like explosions or fires that can occur if propane vapor concentrations rise above the LFL in combination with an ignition source.

By recognizing and adhering to these safety parameters, individuals working with propane can minimize risks associated with its use.