[Code of Federal Regulations]

[Title 30, Volume 1]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 30CFR57.4000]



[Page 333-334]

 

                       TITLE 30--MINERAL RESOURCES

 

  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR

 

PART 57_SAFETY AND HEALTH STANDARDS_UNDERGROUND METAL AND NONMETAL MINES

--Table of Contents

 

                  Subpart C_Fire Prevention and Control

 

Sec.  57.4000  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).



    Escapeway. A designated passageway by which persons can leave an 

underground mine.



[[Page 334]]



    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.

    Main fan. A fan that controls the entire airflow of an underground 

mine or the airflow of one of the major air circuits of the mine.

    Mine opening. Any opening or entrance from the surface into an 

underground mine.

    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.



[50 FR 4082, Jan. 29, 1985, as amended at 68 FR 32361, May 30, 2003; 69 

FR 38842, June 29, 2004]