From: Todd Perkins <p3wt3r**At_Symbol_Here**CHARTER.NET>
Subject: Re: [DCHAS-L] CO2 liquid/CO2 gas mix up
Date: Fri, 7 Mar 2014 11:26:09 -0500
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: E29309EE-4593-47B5-A2E6-F7F5A9D871B8**At_Symbol_Here**
In-Reply-To <1394204244.72637.YahooMailNeo**At_Symbol_Here**>

Both types of cylinder contain liquefied compressed carbon dioxide, the siphon cylinders have a dip tube that reaches down into the liquid. Our policy is to paint "siphon" in large letters of a contrasting color on our dip tube cylinders. If your supplier was us at Airgas, let me know and I can get some other folks involved to help.

The greatest concerns are causing certain parts to crack or otherwise fail due to cold, and creating a situation where the liquid could get trapped in a section that would seal on both sides causing n over pressurization of that section of the apparatus. Depending on the design of your manifold, both these dangers can be prevented through engineering controls.

Todd Perkins
Safety Director
Airgas USA, LLC

Sent from my iPhone

On Mar 7, 2014, at 9:57 AM, Anthony Santoro <anthonysantoro**At_Symbol_Here**YAHOO.COM> wrote:


Has anyone ever experienced a situation where a liquid CO2 cylinder was introduced to a multiple tank, CO2 gas manifold and distribution system?

I recently became aware of this potential problem when it was discovered that the only difference between a small cache of both liquid and gas CO2 cylinders was a small 4" sticker indicating the presence of an siphon tube.  The cylinders have the same valve connection.

I did contact our gas supplier for some insight and explanation regarding the tanks and am awaiting a response.. 

Best Regards,
Anthony Santoro

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