[labnetwork] TTIP Cylinder Overheated - Request for Advise

[Hathaway, Malcolm R]

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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