From: Richard Palluzi <rpalluzi**At_Symbol_Here**VERIZON.NET>
Subject: Re: [DCHAS-L] Regulations for Snorkels
Date: Tue, 26 Feb 2019 09:47:12 -0500
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 008501d4cde2$2874c030$795e4090$**At_Symbol_Here**verizon.net
In-Reply-To


ASHRAE 110 gives you a methodology for testing fume hood face velocity. You could use the same basis for a snorkel but they usually are so small you can only test one point unless you shrink the grid size. The biggest issue I always had is that if they put the velocity probe =BD" into the duct they will get a much higher reading than =BD" past the duct. And while it is more accurate inside the effectiveness if really based on how far outside is the source. The ASHRAE handbook set also has some good information on design of these type systems but with (sadly) no real laboratory examples.

 

Richard Palluzi

PE, CSP

 

Pilot plant and laboratory consulting, safety, design,reviews, and training

www.linkedin.com/in/richardppalluzillc/

 

Richard P Palluzi LLC

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From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of Samuella Sigmann
Sent: Tuesday, February 26, 2019 9:11 AM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] Regulations for Snorkels

 

Oh Wise Ones -

Are there any flow or testing regulations (ANSI or otherwise) for lab snorkels.  Any best practice guidelines?

Thanks in advance,
Sammye

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Samuella B. Sigmann, MS, NRCC-CHO

Chair, ACS Division of Chemical Health & Safety, 2019

Senior Lecturer/Safety Committee Chair/Director of Stockroom

Chemistry

Appalachian State University

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