Log In Sign Up

NOTE: This is an unformatted excerpt from our online fire protection training library.

Classification Basics

Helpful Hint

Combustible liquids are distinguished from flammable liquids by their flash points. The flash point is essentially the temperature at which a specific liquid will vaporize to create an ignitable mixture in air. Flammable liquids have flash points below 100° F, and combustible liquids are those with flash points of 100° F or greater. From the standpoint of Article 500, flammable liquids are not ignitable until atomized or vaporized and mixed with air. Thus, flammable liquids themselves do not create the explosion and fire hazard, the hazard is created by air mixed with vapors produced by the flammable liquids. The presence of a flammable liquid presents the possibility of such an ignitable mixture being created. Combustible liquids may present the same type of hazard if the combustible liquids are handled or stored at temperatures above their flash points. A given liquid may create a flammable mixture and a classified area in one location and not in another location, depending on the ambient temperatures. Make sure to click the Code Example button.
NOTE: This is an unformatted excerpt from our online fire protection training library.

Contact Us:

Please fill in the fields below:

    Privacy Policy
    Please choose all that interest you.

    Contact Customer Service at AcademySupport@jensenhughes.com or 800-930-9414 option 1.

    Our regular support hours are 9:00 AM to 5:00 PM, Monday through Friday, except holidays...