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NFPA 45 – Compressed Gases and Cryogenic liquids in the lab. 

Question asked by Jennifer Tant on Apr 5, 2017

5.4.1 – (5) A compressed gas cylinder larger than lecture bottle size is located so that it could prevent safe egress in the event of accidental release of cylinder contents.

5.4.1 – (6) A cryogenic container is located so that it could prevent safe egress in the event of accidental release of container contents.

Some of our laboratories only have 1 door for egress. For the compressed gas cylinders, is there any discretion for the type of cylinder?  If I have an oxygen cylinder in proximity to a door, is that considered preventing safe egress in the event of accidental release?  What about argon, nitrogen, carbon dioxide, and helium.  These are not flammable gases.  Is there a “distance” that is considered safe from the egress route in the laboratory?  Seeking guidance on proper locations to mount our compressed gases and cryogenic liquids to operate instrumentation. 

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