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From: Jeffrey Lewin <jclewin**At_Symbol_Here**MTU.EDU>
Subject: Re: [DCHAS-L] Hydrogen gas exhaust
Date: Dec 6, 2021 16:04 UTC
Reply-To:
ACS Division of Chemical Health and Safety
In-Reply-To:
Good (?) morning,--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchasI am trying to determine the minimum exhaust for hydrogen gas (not liquified) and see that in NFPA 55, section 6.17.3.2 requires a minimum exhaust of 1 scf/min/ft2. I had to look up scf--it is 'standard cubic foot' and is defined as 1 cubic foot of natural gas at 60F and normal atmospheric pressure.If I know the size of the room and air changes per hour, is it possible to calculate my exhaust without doing an experiment?MANY thanks!
Margaret--Margaret A. Rakas, Ph.D.
Lab Safety & Compliance Director
Clark Science Center
413-585-3877 (p)