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Subject: [DCHAS-L] Chemical Safety headlines from Google (16 articles)
Date: Monday, October 16, 2017 at 6:01:34 PM
Author: DCHAS Secretary <secretary**At_Symbol_Here**DCHAS.ORG> 		Next by Date:
Subject: [DCHAS-L] Rainbow Flame Method using a spray bottle?
Date: Tue, 17 Oct 2017 13:01:34 -0500
Author: Patrick A Ceas

From: Stephanie Tumidajski Hess <stumidajski**At_Symbol_Here**GMAIL.COM>
Subject: Re: [DCHAS-L] Lab reactors and pressure vessels
Date: Tue, 17 Oct 2017 08:02:11 -0500
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: CAAYPS_C5k6XtH26CBkfhgiW2Lq2Ed4Fuc+A9W5hj2-ANgyn+oQ**At_Symbol_Here**mail.gmail.com
In-Reply-To <9AC07297-7C5C-4A9F-B820-BD5070F04814**At_Symbol_Here**keene.edu>


Ralph,
I apologize for not being clear. My question refers to experiments with planned high pressure. For example, hydrogenations in a Parr shaker. Some think at a certain pressure they shouldn't be doing the reaction in their laboratory even though the reactor/shaker/equipment is rated for the desired psi. I was just curious if universities had a conservative threshold or if they evaluate it case by case.
Thanks,
Stephanie

On Mon, Oct 16, 2017 at 9:11 AM, Stuart, Ralph <Ralph.Stuart**At_Symbol_Here**keene.edu> wrote:
> >Do any universities or departments have a policy that reactions over a certain pressure cannot be performed in a normal laboratory (fume hood) regardless of the pressure rating of the equipment?

I'm not clear if you're referring to planned high pressure processes or to emergency scenarios that result from explosions. According to Labconco, even explosion proof chemical hoods are not designed to contain explosions
http://www.labconco..com/articles/does-that-lab-really-need-an-explosion-proof-fum
rather their electrical design makes them less likely to spark one.

I don't if I ever seen a hood designed to contain an explosion inside the hood...

- Ralph

Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
603 358-2859

ralph.stuart**At_Symbol_Here**keene.edu

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Stephanie Tumidajski
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