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Previous by Date: Subject: Re: [DCHAS-L] Regulations for Snorkels Date: Tuesday, February 26, 2019 at 9:45:19 AM Author: Dr Bob <drbob**At_Symbol_Here**FLOWSCIENCES.COM> |
Next by Date: Subject: Re: [DCHAS-L] Regulations for Snorkels Date: Tue, 26 Feb 2019 08:47:58 -0600 Author: Harry J. Elston |
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
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