UL 404 UL Standard for Safety Gauges, Indicating Pressure, for Compressed Gas Service
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UL 404 Document Information:
Title
UL Standard for Safety Gauges, Indicating Pressure, for Compressed Gas Service
Underwriters Laboratories Inc.
Publication Date:
Jan 31, 2005
Scope:
These requirements cover indicating pressure gauges of the elastic element type usually employed in the high-pressure side of regulators or reducing valves used on compressed gas containers or cylinders of oxygen, hydrogen, nitrogen, and other gases. Such gauges usually have pressure ranges of 0 – 1500, 0 – 2000, 0 – 3000, or 0 – 4000 pounds per square inch (psi) (0 – 10.34, 0 – 13.78, 0 – 20.68, or 0 – 27.56 MPa).
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