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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 Systems for Welding, Cutting, and
Allied Processes, NFPA 51.
These requirements do not cover:
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.
Regulators for handling liquids under cryogenic
temperatures.
The regulating performance flow characteristics of the
regulator, and the physiological effects of regulators to be used
with medical gases.
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