This article shall apply to the storage, handling, and use of
compressed gases and cryogenic liquids as defined herein. Liquefied
petroleum gases and compressed gases uses in conjunction with welding
or cutting operations are specifically exempt from the provisions
of this article.
As used in this article, the following terms shall have the
meanings indicated:
COMPRESSED GAS
A.
A material, or mixture of materials that:
(1)
Is a gas at 68° F. (20° C.) or less at 14.7 psia (101
kPa) of pressure; and
(2)
Has a boiling point of 68° F. (20° C.) or less at 14.7
psia (101 kPa) which is either liquefied, nonliquified or in solution,
except those gases which have no other health- or physical-hazard
properties are not considered to be compressed until the pressure
in the packaging exceeds 41 psia (282 kPa) at 68° F. (20°
C.).
B.
The states of a compressed gas are categorized as follows:
(1)
Nonliquified compressed gases are gases, other than those in
solution, which are in packaging under the charged pressure and are
entirely gaseous at a temperature of 68° F. (20° C.).
(2)
Liquified compressed gases are gases that, in a packaging under
the charged pressure, are partially liquid at a temperature of 68°
F. (20° C.).
(3)
Compressed gases in solution are nonliquified gases that are
dissolved in a solvent.
(4)
Compressed gas mixture consist of a mixture of two or more compressed
gases contained in a packaging, the hazard properties of which are
represented by the properties of the mixture as a whole.
CRYOGENIC FLUID
A fluid having a boiling point lower than -130° F. (-89.9°
C.) at 14.7 pounds per square inch atmosphere (psia) (an absolute
pressure of 101.3 kPa).