Hello all,
With the history was a bit different. It was spectacular. Although the
tubing was not latex, but a kind of synthetic blue plastic. It virtualy
exploded during the transfer. There was a sharp bang and the thing
became hundred of small pieces, but we just closed the tap and replaced
the tubing and continued the transfer. It was such a fright for me that
was just beggining at the time.
Best wishes,
Emidio V. L. da Cunha
----- Original Message -----
> From: Guillermo Moyna
> To: ammrl_at_chemnmr.colorado.edu
> Sent: Wednesday, June 18, 2003 5:20 PM
> Subject: Anectdotal - Latex tubing crack...
Howdy,
This one is just an anecdote that some people may find interesting.
Although I never heard of anyone having problems with latex tubing
during liquid N2 transfers, I always knew that they could break. After
more than two years of service, our latex tube did crack the other day.
It wasn't spectacular at all when it happened, just a sharp 'snap!' and
that's it. Since we had the tube covered with armaflex insulation, there
was not much liquid N2 spewing all over the place. We just closed the N2
tap, replaced the tube with an identical 'new' tube that we always had
as a backup, and kept going.
What was interesting was how the tube cracked. Initially I noticed a
longitudinal crack at the tip we plug into the magnet fill port. After I
took it out of the armaflex, I saw that the crack went from end to end
of the tube (almost six feet). That was pretty 'cool' as one of my
students put it. The whole 6 foot crack appeared in one instant. Neat.
As I said, just an anecdote for your Wednesday afternoon. I plan to
keep using these things (covered with armaflex). $20 bucks for two years
of service ain't bad...
Guillermo
+==================-------------- --- -- - - - -
Guillermo Moyna, PhD
Assistant Professor of Chemistry
Department of Chemistry & Biochemistry
University of the Sciences in Philadelphia
600 South 43rd Street
Philadelphia, PA 19104-4495
"The only existing things are atoms and empty space.
All else is mere opinion" - Democritus, 370 B.C.
Office: Griffith Hall 360
Phone: (215) 596-8526
Fax: (215) 596-8543
e-mail: g.moyna_at_usip.edu
WWW: http://tonga.usip.edu/gmoyna/index.html
http://www.usip.edu/chemistry/faculty/moyna.asp
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Received on Thu Jun 19 2003 - 15:28:15 MST