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From: Richard Palluzi <rpalluzi**At_Symbol_Here**VERIZON.NET>
Subject: Re: [DCHAS-L] PNNL Hydrogen Fire Event Video
Date: Jan 29, 2019 15:15 UTC
Reply-To:
ACS Division of Chemical Health and Safety
In-Reply-To: Re: [DCHAS-L] PNNL Hydrogen Fire Event Video
You need to be very careful as the flow limiting orifice supplied in most commercial cylinders, while limiting vs. a fully open valve, still allows an awful large flow which is more than usually required for research purposes. Installing a custom sized flow limiting restrictive orifice (available from Swagelok among others) is usually more prudent.
Richard Palluzi
PE, CSP
Pilot plant and laboratory consulting, safety, design,reviews, and training
Richard P Palluzi LLC
72 Summit Drive
Basking Ridge, NJ 07920
rpalluzi**At_Symbol_Here**verizon.net
908-285-3782
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of Ken Kretchman
Sent: Tuesday, January 29, 2019 8:31 AM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] PNNL Hydrogen Fire Event Video
Depending on flow rates required..obtaining flammable and/or toxic gas cylinders with flow limiting orifices is also a good practice.
Ken
Ken Kretchman, CIH, CSP Director, Environmental Health and Safety
NC State University / Box 8007 / 2620 Wolf Village Way / Raleigh North Carolina 27695-8007
Email: Ken_Kretchman**At_Symbol_Here**ncsu.edu / Phone: (919).515.6860 / Fax: (919).515.6307
On Mon, Jan 28, 2019 at 10:10 PM jeskiekb**At_Symbol_Here**comcast.net <jeskiekb**At_Symbol_Here**comcast.net> wrote: