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April 2005

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Subject:
From:
Jason Gregory <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Jason Gregory <[log in to unmask]>
Date:
Tue, 19 Apr 2005 15:28:06 -0500
Content-Type:
text/plain
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text/plain (82 lines)
As I understand, the heat from the welding can turn the vapors into
hydrofluoric acid. Therefore, care must be taken for safety's sake.

Jason Gregory
Manufacturing Engineer
Innova Electronics
(281)653-5593
(281)653-5594 fax
(281)212-0844 cell
[log in to unmask]


-----Original Message-----
From: Crepeau, Phil (Space Technology) [mailto:[log in to unmask]]
Sent: Tuesday, April 19, 2005 3:24 PM
To: TechNet E-Mail Forum; Jason Gregory
Subject: RE: [TN] Welding and Vapor Phase fluid


hi,

if the vapor phase material is a fluorocarbon, i'd be very cautious.  not in
regard to an explosion, but in regard to very toxic gases that can form when
fluorocarbons pyrolyze.  from.-
http://www.cdc.gov/mmwr/preview/mmwrhtml/00051631.htm

'As a cigarette is smoked, fluorocarbons are then burned or "pyrolyzed", and
the products of decomposition are inhaled with the cigarette smoke. The
actual products of decomposition may vary and are dependent on which
polymers were used and at what temperature and humidity they were burned.
The most common known products of pyrolysis include inorganic fluorides,
hydrogen fluoride, carbonyl fluoride, and perfluoropropane.'

phil

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Jason Gregory
Sent: Tuesday, April 19, 2005 10:49 AM
To: [log in to unmask]
Subject: [TN] Welding and Vapor Phase fluid


Hello all,

I need to grind and re-weld a bracket in my vapor phase machine and was
wondering what precautions to take? There is a very thin residual amount of
VP fluid at the bottom of the tank after draining.

Any takers?

Jason Gregory
Manufacturing Engineer
Innova Electronics
(281)653-5593
(281)653-5594 fax
(281)212-0844 cell
[log in to unmask]

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