Which term is used interchangeably with flammability range?

The term that is used interchangeably with flammability range is "flammable limit." The flammability range refers to the concentration range of a vapor in air that can ignite and produce a fire; this range is defined by the upper and lower flammable limits.

The upper flammable limit (UFL) is the maximum concentration of vapor in air above which the mixture is too rich to burn, while the lower flammable limit (LFL) is the minimum concentration below which the mixture is too lean to ignite. Flammable limits are critical in understanding fire prevention and safety measures, as they dictate the conditions under which a substance can ignite.

While "explosive limit" is a related term, it encompasses a broader scope including conditions for explosions, often referring to materials that can lead to a rapid release of energy rather than simply burning. Terms like "ignition point" and "combustion limit" are specific to different aspects of combustion and do not align directly with the concept of flammability range as defined by flammable limits.

Understanding the concept of flammability limits is essential for firefighters to evaluate risks associated with combustible materials in various scenarios.