UL 252A

Please note: All interim revisions for this edition available at time of your purchase will be included.

Compressed Gas Regulator Accessories

UL 252A

1 Scope

1.1 These requirements cover accessories intended for direct connection to the low or delivery pressure side of compressed gas regulators. These devices are not intended for direct connection to high or storage cylinder pressures.

1.2 Accessories covered by these requirements are intended for use with compressed gases such as air, carbon dioxide, inert gases, fuel gases, nitrogen, nitrous oxide and oxygen.

1.3 The suitability of an accessory in combination with a compressed gas regulator shall be judged under the applicable requirements of the Standard for Compressed Gas Regulators, UL 252.

1.4 These requirements do not cover:

a) Flow characteristics,

b) The physiological effects of accessories to be used with medical gases,

c) Accuracy of pressure gauges and flow indicators, nor

d) Accessories that are covered by other UL standards.

This new edition is a periodic re-issuance to ensure that UL Standards remain up-to-date with regard to format and editorial issues such as renumbering, repaginating, correction of editorial errors, correction of cross-references and updating titles of referenced Standards. Revisions to UL 252A reflect the discontinued use of cadmium plating in compressed gas regulator accessories and the replacement of ASTM No. 3 Swelling Oil with IRM 903 as stated in the bulletin dated April 9, 2003.