What are the different classes relevant to Combustible and Flammable liquids and where can I find information?

Answer 1

Here are definitions for your question on classes:

"Combustible liquid" means any liquid having a flashpoint at or above 100 deg. F. (37.8 deg. C.)

Combustible liquids shall be divided into two classes as follows:

"Class II liquids" shall include those with flashpoints at or above 100 deg. F. (37.8 deg. C.) and below 140 deg. F. (60 deg. C.)
except any mixture having components with flashpoints of 200 deg. F. (93.3 deg. C.) or higher
the volume of which make up 99 percent or more of the total volume of the mixture.

"Class III liquids" shall include those with flashpoints at or above 140 deg. F. (60 deg. C.)

Class III liquids are subdivided into two subclasses:

"Class IIIA liquids" shall include those with flashpoints at or above 140 deg. F. (60 deg. C.) and below 200 deg. F. (93.3 deg. C.), except any mixture having components with flashpoints of 200 deg. F. (93.3 deg. C.), or higher, the total volume of which make up 99 percent or more of the total volume of the mixture.

"Class IIIB liquids" shall include those with flashpoints at or above 200 deg. F. (93.3 deg. C.). This section does not cover Class IIIB liquids. Where the term "Class III liquids" is used in this section, it shall mean only Class IIIA liquids.

When a combustible liquid is heated for use to within 30 deg. F. (16.7 deg. C.) of its flashpoint, it shall be handled in accordance with the requirements for the next lower class of liquids.

"Flammable liquid" means any liquid having a flashpoint below 100 deg. F. (37.8 deg. C.)
except any mixture having components with flashpoints of 100 deg. F. (37.8 deg. C.) or higher
the total of which make up 99 percent or more of the total volume of the mixture. Flammable liquids shall be known as Class I liquids.

Class I liquids are divided into three classes as follows:


”Class IA” shall include liquids having flashpoints below 73 deg. F. (22.8 deg. C.) and having a boiling point below 100 deg. F. (37.8 deg. C.).

“Class IB” shall include liquids having flashpoints below 73 deg. F. (22.8 deg. C.) and having a boiling point at or above 100 deg. F. (37.8 deg. C.).

“Class IC” shall include liquids having flashpoints at or above 73 deg. F. (22.8 deg. C.) and below 100 deg. F. (37.8 deg. C.).

And, for your question on references:

General Industry
OSHA Subpart H, 29 CFR 1910.106, Flammable and combustible liquids

Construction
OSHA Subpart F, 29 CFR 1926.152, Flammable and combustible liquids

NFPA 30, Flammable and combustible liquids

www.osha.gov

www.nfpa.org

Answer 2

Check the link below -- it seems to have the information you are looking for, which is the classification of combustible and flammable liquids based on flashpoints.

Hope this helps!!

Answer 3

www.cia.gov - leave name and address maybe you could start a pen pal situation going !!