[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR56.4000]

[Page 261-262]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 56--SAFETY AND HEALTH STANDARDS--SURFACE METAL AND NONMETAL MINES--Table of Contents
 
                 Subpart C--Fire Prevention and Control
 
Sec. 56.4000  Definitions.

    Authority: Sec. 101, Federal Mine Safety and Health Act of 1977, 
Pub. L. 91-173, as amended by Pub. L. 95-164, 91 Stat. 1291 (30 U.S.C. 
811).


    The following definitions apply in this subpart.
    Combustible liquids. Liquids having a flash point at or above 100 
deg.F (37.8  deg.C). They are divided into the following classes:
    Class II liquids--those having flash points at or above 100  deg.F 
(37.8  deg.C) and below 140  deg.F (60  deg.C).
    Class IIIA liquids--those having flash points at or above 140  deg.F 
(60  deg.C) and below 200  deg.F (93.4  deg.C).
    Class IIIB liquids--those having flash points at or above 200  deg.F 
(93.4  deg.C).

[[Page 262]]

    Combustible material. A material that, in the form in which it is 
used and under the conditions anticipated, will ignite, burn, support 
combustion, or release flammable vapors when subjected to fire or heat. 
Wood, paper, rubber, and plastics are examples of combustible materials.
    Fire resistance rating. The time, in minutes or hours, that an 
assembly of materials will retain its protective characteristics or 
structural integrity upon exposure to fire.
    Flammable gas. A gas that will burn in the normal concentrations of 
oxygen in the air.
    Flammable liquid. A liquid that has a flash point below 100  deg.F 
(37.8  deg.C), a vapor pressure not exceeding 40 pounds per square inch 
(absolute) at 100  deg.F (37.8  deg.C), and is known as a Class I 
liquid.
    Flash point. The minimum temperature at which sufficient vapor is 
released by a liquid to form a flammable vapor-air mixture near the 
surface of the liquid.
    Multipurpose dry-chemical fire extinguisher. An extinguisher having 
a rating of at least 2-A:10-B:C and containing a nominal 4.5 pounds or 
more of dry-chemical agent.
    Noncombustible material. A material that, in the form in which it is 
used and under the conditions anticipated, will not ignite, burn, 
support combustion, or release flammable vapors when subjected to fire 
or heat. Concrete, masonry block, brick, and steel are examples of 
noncombustible materials.
    Safety can. A container of not over five gallons capacity that is 
designed to safely relieve internal pressure when exposed to heat and 
has a spring-closing lid and spout cover.
    Storage tank. A container exceeding 60 gallons in capacity used for 
the storage of flammable or combustible liquids.