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Re: [PSUBS-MAILIST] O2
Here's the article from Avweb.com on welders oxy for pilots. John Deakin is well respected in the
community and you can look at the following discussion if you register for the site (easy and no problem).
I've never seen anybody put a dent in his arguement. ALL the oxy these days comes out of the same
process. If you're using your own tanks, you don't have to worry about any potential contamination. They
don't have more moisture in medical grade, that's why it's bubbled thru water before you breath it.
Read the article.
Greg
From: "David Deffner" <deffner@glade.net>
To: <personal_submersibles@psubs.org>
Subject: Re: [PSUBS-MAILIST] O2
Date sent: Tue, 7 May 2002 11:02:21 -0500
Send reply to: personal_submersibles@psubs.org
> Being a pilot, and presently building a plane, I believe the only real
> difference with aviation grade, other than what Paul has already stated, is
> that it has a lower moisture content. Don't want to get way up there in
> really freezing conditions and have an oxygen line freeze. I'll ck on this.
> David
> ----- Original Message -----
> From: "Paul B" <paul_victor@hotmail.com>
> To: <personal_submersibles@psubs.org>
> Sent: Tuesday, May 07, 2002 9:49 AM
> Subject: Re: [PSUBS-MAILIST] O2
>
>
> > As far as I know, oxygen is divided into 3 major groups:
> >
> > 1. Medical
> > 2. Aviation
> > 3. Welding
> >
> > To get medical grade O2, you DO have to have a prescription. Now, in case
> > with aviation grade as far as I know it's the same purity as medical. The
> > difference is that you don't need a prescription to get it; and a tank,
> > unlike in case with medical grade, does not have a unique serial number
> each
> > individual cylinder can be traced by, only the lot number. I think they're
> > doing it in case of medical grade because life and death depend on it -
> they
> > need a way to find out where the stuff came from if something goes badly
> > wrong.
> >
> > Medical and aviation O2 cylinders are getting purged of all gases before
> > they're filled with gas. Welding grade O2 cylinders are not. There's no
> > telling what could be in it other than O2. For all you know, it could be
> CO
> > or some other pretty nasty stuff.
> >
> > However, welding O2 manufacturers say it's critical to have very pure O2
> for
> > metal cutting purposes, so I guess that stuff should be more than fit to
> > breathe.
> >
> > I'd try my chances trying to get aviation grade first. And then, if I
> > failed, I would talk directly to the manufacturer of welding grade O2 and
> > ask him about chemical contents of his product.
> >
> > Sincerely, Paul.
> >
> > _________________________________________________________________
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