What is the upper flammability limit of propane in air?

The upper flammability limit (UFL) of propane in air is indeed 9.6%. This measurement indicates the maximum concentration of propane in the air above which the mixture will not ignite if there is a source of ignition present. Understanding the UFL is crucial for safety in handling and storing propane, as it helps in assessing situations where the presence of propane could pose a risk of fire or explosion.

When the concentration of propane in the air exceeds 9.6%, the mixture becomes too rich to burn effectively. This knowledge is essential for professionals working with propane, as they must ensure that the environment where propane is used or stored remains below this limit for safety.

It is also important to be aware of the lower flammability limit (LFL), as this defines the minimum concentration needed for the mixture to ignite. Familiarizing oneself with both the upper and lower limits aids in creating safe handling practices to prevent accidents associated with propane.