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Previous by Date: Subject: Re: [DCHAS-L] Pressurization of 5 gallon glass carboy Date: Thursday, February 24, 2022 at 11:38:04 AM Author: Tammy M. Lutz-Rechtin <tlutzrec**At_Symbol_Here**UARK.EDU>

Next by Date: Subject: Re: [DCHAS-L] [External] [DCHAS-L] Pressurization of 5 gallon glass carboy Date: Thu, 24 Feb 2022 12:05:28 -0500 Author: Samuella Sigmann

Hi,
Many years ago I have witnessed one of these 5 gallon carboys that was pressurised with carbon dioxide to be saturated with water to feed a anaerobic bioreactor. The graduate student as just refilled the reservoir with water and while he was re-pressurising the reservoir it exploded. Thankfully nobody was injured but it has been a near missed one. I cannot say at was pressure but I would have been in the low psi considering the scale of the experiment.

Hope this help the discussion

Pierre Chantal, PhD, Eng
(he-him | il-lui)
Head, chemistry section | Chef section chimie
Product Safety Labortory | Laboratoire de la securite des produits
1800 Walkley road
Ottawa, ON
K1H 8K3
613-946-3879

-----Original Message-----
From: ACS Division of Chemical Health and Safety On Behalf Of Ralph Stuart
Sent: 2022-02-24 11:15 AM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [DCHAS-L] Pressurization of 5 gallon glass carboy

One of our faculty member was doing due diligence inspections on inherited equipment he uses in the physical chemistry lab for gas demonstrations. He found some defects in glass 5 gallon carboys, so ordered replacements. They arrived from DWK-Kimble with precautions etched on the outside, including 'Do not evacuate or pressurize unless recommended in the current DWK Kimble catalog.' Unfortunately, the catalog does not contain any information about pressurizing or evacuating the carboys. It simply says that the carboys are "Ideal for storage and dispensing of solutions.'

There are no discernible design differences between the new carboys and the older ones. I wonder if anyone on the list has experience with assessing the risk associated with gas pressure differences with this equipment?

Thanks for any information on this.

- 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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