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UL 252 Document Information:
Title
UL Standard for Safety Compressed Gas Regulators
Underwriters Laboratories Inc.
Publication Date:
Oct 10, 2003
Scope:
These requirements cover regulators used to reduce the pressure of
compressed industrial gases from
a source or storage cylinder pressure of not more than 5500 psig
(37.91 MPa) to the use pressure.
Regulators covered by these requirements are intended for use with
compressed gases such as air,
carbon dioxide, inert gases, fuel gases, nitrogen, nitrogen oxide, and
oxygen.
Regulators for welding, cutting, and heating operations are intended
for use in accordance with the
Standard for the Design and Installation of Oxygen-Fuel Gas System for
Welding, Cutting, and Allied
Processes, NFPA 51.
These requirements do not cover:
a) LP-Gas pressure regulators for equipment intended for installation
and use in accordance with
requirements of the Liquefied Petroleum Gas Code, NFPA 58. Such
regulators are evaluated under the
Standard for LP-Gas Regulators, UL 144.
b) Regulators for handling liquids under cryogenic temperatures.
c) The regulating performance flow characteristics of the regulator,
and the physiological effects
of regulators to be used with medical gases.
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