Re: [PSUBS-MAILIST] welding used steel

["Dan H." <jmachine@adelphia.net>]

I remember being told that running the exhaust from a car or truck into a
tank to purge out the available oxygen was a way to weld a tank that once
held flammables.  I never tried it myself but I don't see why it wouldn't be
as good as purging with CO2.  That was before cars came with the pollution
devices though, if that makes a matter or not.

To tell the truth, CO2 or exhaust gases, I just avoid welding or cutting any
tanks when flammables were ever involved.  I once saw a five gallon can blow
up while a guy tried to grind off the top.  It wasn't pretty!

A propane tank hull isn't as much of a sub as one might think.  It looks
like a good start but it's only the tip of the iceberg.  After building my
sub, I see where the cylindrical tube and the two endcaps was about the 5%
mark of the completed sub.

Don't over estimate starting with a tank.
Dan H.

----- Original Message -----
From: "Warren Greenway" <opensourcesub@yahoo.com>
To: <personal_submersibles@psubs.org>
Sent: Saturday, April 10, 2004 9:12 PM
Subject: Re: [PSUBS-MAILIST] welding used steel


> Yes, the tank was filled with CO2 when welding. The
> tank was flushed out very well before anything was
> done, then cleaned with degreaser. There were no
> problems with cutting and welding the tank...Other
> then
> the smell, which passed after some time.
>
> Warren.
>
> --- Fly Deep <flydeep4u@yahoo.com> wrote:
> >
> >
> >
> >
> >
> >
> > Warren,,,did you use a explosion meter first,,a
> > sniffer,,or did you just do it and weld on the
> > pressure vessel...There is a guy down here that
> > wants to o some welding on two big propane tanks and
> > I'm a bit nervous,,,I had figured on flooding them
> > with Co2 first...
> >
> > The steel must be cleaned with a de-greasing type
> > cleaner, but it welds perfectly once surface
> > cleaned.
> > I can attest to this from personal experience. The
> > other thing I can attest to is the smell of an old
> > and heavily used propane tank once you cut into it!
> > Wow! There is nothing as potent!
> >
> > Warren
> >
> > Do you Yahoo!?
> > Yahoo! Mail - More reliable, more storage, less spam
>
>
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