[labnetwork] TTIP Cylinder Overheated - Request for Advise

[Collins, Deon]

I would have the bottle disposed of ASAP. The structural integrity of the cylinder has been compromised.

Deon D. Collins

FACILITY MANAGER
The Grainger College Of Engineering UIUC
Holonyak Micro & Nanotechnology Lab
208 N Wright St Rm. 1114 | MC-249
Urbana, IL 61801
217-300-7531 | deonc69 at illinois.edu<mailto:deonc69 at illinois.edu>


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From: labnetwork <labnetwork-bounces at mtl.mit.edu> On Behalf Of Hathaway, Malcolm R
Sent: Tuesday, July 18, 2023 4:52 PM
To: Labnetwork Mailing List <labnetwork at mtl.mit.edu>
Subject: [labnetwork] TTIP Cylinder Overheated - Request for Advise

Hey all,

We (not CNS, but another lab) have an issue with a TTIP cylinder (Cambridge Nano/swagelok-style) which got over-heated to an unknown temp, whereupon the bottle acquired a bulge.  It was closed at the time, and so is still under pressure to an unknown degree.  The bottle label melted, for reference.

Questions:

Are the contents likely to be decomposition products?
Would these products be flammable or explosive?
Can a bottle burst under the flexural stress of slow depressurization?
Is there a safe way to depressurize?

We came up with the idea of attaching a second valve (these are all VCR), and alternating opening inner valve (then closing) and opening outer valve (then closing), to step-wise vent the bottle.  Has anyone heard of such a technique causing the bottle to burst along the way?

Suggestion welcome.


Mac
--

Mac Hathaway

Senior Process and Systems Engineer

Harvard Center for Nanoscale Systems

11 Oxford St.

Cambridge, MA  02138

617-495-9012

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