[DCHAS-L] Pressurization of 5 gallon glass carboy

Demystify: 

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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