How is "flash point" different from "fire point"?

The distinction between flash point and fire point is pivotal in understanding the flammability of liquids, particularly oils. Flash point refers to the minimum temperature at which sufficient vapor will be produced by the liquid to form an ignitable mixture with air. This means that at flash point, if an ignition source is present, the vapors can ignite briefly. However, this doesn't imply that the liquid will sustain combustion.

Fire point, on the other hand, is the temperature at which a substance will not only ignite but will also continue to burn for a sustained period. This marks a critical difference; while the flash point indicates the risk of ignition, the fire point indicates the material’s ability to support combustion once ignited.

Understanding this distinction is essential, especially in safety scenarios where knowing the temperatures at which these phenomena occur can influence handling practices and fire prevention strategies. This knowledge is particularly significant in industries utilizing flammable substances, as it informs both safety protocols and equipment design.