1926.155(a) "Approved", for the purpose of this subpart, means equipment that has been listed or approved by a
nationally recognized testing laboratory such as Factory Mutual Engineering Corp., or Underwriters' Laboratories, Inc., or Federal agencies such as
Bureau of Mines, or U.S. Coast Guard, which issue approvals for such equipment.
1926.155(b) "Closed container" means a container so sealed by means of a lid or other device that neither liquid
nor vapor will escape from it at ordinary temperatures.
1926.155(c) "Combustible liquids" mean any liquid having a flash point at or above 140 deg. F. (60 deg. C.), and
below 200 deg. F. (93.4 deg. C.).
1926.155(d) "Combustion" means any chemical process that involves oxidation sufficient to produce light or
heat.
1926.155(e) "Fire brigade" means an organized group of employees that are knowledgeable, trained, and skilled in
the safe evacuation of employees during emergency situations and in assisting in fire fighting operations.
..1926.155(f)
1926.155(f) "Fire resistance" means so resistant to fire that, for specified time and under conditions of a
standard heat intensity, it will not fail structurally and will not permit the side away from the fire to become hotter than a specified temperature.
For purposes of this part, fire resistance shall be determined by the Standard Methods of Fire Tests of Building Construction and Materials, NFPA
251-1969.
1926.155(g) "Flammable" means capable of being easily ignited, burning intensely, or having a rapid rate of flame
spread.
1926.155(h) "Flammable liquids" means any liquid having a flash point below 140 deg. F. and having a vapor pressure
not exceeding 40 pounds per square inch (absolute) at 100 deg F.
1926.155(i) "Flash point" of the liquid means the temperature at which it gives off vapor sufficient to form an
ignitable mixture with the air near the surface of the liquid or within the vessel used as determined by appropriate test procedure and apparatus as
specified below.
1926.155(i)(1) The flash point of liquids having a viscosity less than 45 Saybolt Universal Second(s) at 100 deg.
F. (37.8 deg. C.) and a flash point below 175 deg. F. (79.4 deg. C.) shall be determined in accordance with the Standard Method of Test for Flash
Point by the Tag Closed Tester, ASTM D-56-69.
1926.155(i)(2) The flash point of liquids having a viscosity of 45 Saybolt Universal Second(s) or more at 175 deg.
F. (79.4 deg C.) or higher shall be determined in accordance with the Standard Method of Test for Flash Point by the Pensky Martens Closed Tester,
ASTM D-93-69.
..1926.155(j)
1926.155(j) "Liquefied petroleum gases," "LPG" and "LP Gas" mean and include any material which is composed
predominantly of any of the following hydrocarbons, or mixtures of them, such as propane, propylene, butane (normal butane or iso-butane), and
butylenes.
1926.155(k) "Portable tank" means a closed container having a liquid capacity more than 60 U.S. gallons, and not
intended for fixed installation.
1926.155(l) "Safety can" means an approved closed container, of not more than 5 gallons capacity, having a
flash-arresting screen, spring-closing lid and spout cover and so designed that it will safely relieve internal pressure when subjected to fire
exposure.
1926.155(m) "Vapor pressure" means the pressure, measured in pounds per square inch (absolute), exerted by a
volatile liquid as determined by the "Standard Method of Test for Vapor Pressure of Petroleum Products (Reid Method)." (ASTM D-323-58).
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