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Subject: Re: [DCHAS-L] FW: Welding Fumes
Date: June 4, 2012 10:04:48 AM EDT
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Author: Harry Elston

From: Heather McCollor <mccollor**At_Symbol_Here**MACALESTER.EDU>
Subject: Re: [DCHAS-L] FW: Hydrogen
Date: June 4, 2012 10:52:09 AM EDT
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <D42D431C651F4E4D84DD0279175B3C275C0A867585**At_Symbol_Here**POSTOFFICE.campus.pomona.edu>


Wayne,

I would suggest contacting your specialty gas vendor's tech center for guidelines. My gas vendor has extremely knowledgeable staff to help with questions ranging from vague to ultra-specific. Ask your sales rep for a good contact within the tech staff. They will know the "cream of the crop".

Heather
--
Heather McCollor
Laboratory Materials Supervisor
Macalester College
1600 Grand Ave
St Paul, MN 55105
651-696-6484

NAOSMM president July 2011-July 2013



On Fri, Jun 1, 2012 at 3:53 PM, Wayne Phan <Wayne.Phan**At_Symbol_Here**pomona.edu> wrote:
Hello,

A colleague of mine has a question about hydrogen and nitrogen mixture. Please advise.

See email below.

Thanks,

Wayne




Hi Wayne, I have a question for you. I'd like to use 80/20 H2/N2 or other high % mixes of hydrogen. I have never used more than 5% before. We would not use it much and would not use large volumes-we would bubble the gas into sealed 100 ml bottles of fluid to equilibrate the gas and that's it (in other words, we would never have hydrogen gas flowing for more than a couple minutes at a time, and in very small amounts).
Any idea where I could look for guidelines, etc? Thanks, ejc

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