[TheForge] Re: TheForge Digest, Vol 34, Issue 69

[Lynne Mork]

   Order of lighting and then turning off an oxygen/acetylene torch.

   Over  40 years ago I was taught in the Utah Technical Collage (Welding
   Class)  to turn the acetylene on first,. When shutting down,  turn the
   acetylene  off  first.   The oxygen was supposed to clear the chamber.
   When  I  retired  6 years ago, I went back to a welding school to make
   sure  I  was current with new technology.  I was surprised to find out
   they  now  teach you to turn on the acetylene first, and when shutting
   down to turn the acetylene off last.

   I  checked  in  my old books and found I was correct. The order taught
   has changed!

   Stump
       ______________________________________________________________

     From:  Fred Zickrick <fredz72 at cableone.net>
     Reply-To:  Sponsored by ABANA <theforge at mailman.qth.net>
     To:  theforge at mailman.qth.net
     Subject:  [TheForge] Re: TheForge Digest, Vol 34, Issue 69
     Date:  Tue, 28 Nov 2006 23:10:49 -0600
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     >At 08:09 PM 11/28/2006, you wrote:
     >>Message: 4
     >>Date: Tue, 28 Nov 2006 17:27:33 -0800
     >>From: Garden Gates by Gary Meyer <gardengates at earthtravel.net>
     >>Subject: RE: [TheForge] Gas saver
     >>To: Sponsored by ABANA <theforge at mailman.qth.net>
     >>Message-ID: <7.0.0.16.0.20061128172556.020942a0 at earthtravel.net>
     >>Content-Type: text/plain; charset="us-ascii"; format=flowed
     >>
     >>Yes you are correct.  acetylene FIRST.
     >
     >I've been taught last on, first off.  Get rid of the smoke on the
     >acetylene, then add oxygen to get flame desired.  Shut off the
     >oxygen or it will pop, then shut off the acetylene.
     >There is an online reference which agrees with what I've been
     >taught.
     >http://www.stanford.edu/group/prl/documents/pdf/OAweld.pdf
     >
     >Reference is step 7 in the "Welding" section.
     >
     >Or did I misunderstand the question? :-)
     >
     >
     >Thank you,
     >Fred Zickrick, fredz72 at cableone.net
     >
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