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Re: [PSUBS-MAILIST] Welders

To: <personal_submersibles@psubs.org>
Subject: Re: [PSUBS-MAILIST] Welders
From: MerlinSub@t-online.de
Date: 15 Mar 2007 18:23 GMT
Reply-to: personal_submersibles@psubs.org
Sender: owner-personal_submersibles@psubs.org
Hi Ray.. 

I weld everting myself but not pressure parts. 
I rent a welder from the yard for the pressure welds.
He weld 8 hours a day and 5-6 days the week. 
I just ask the foreman which his best welder is.. 

Much cheaper than grind later all the cracks, 
cold starts, dirty base, hydrogen spots, wrong wire 
etc. out..  

Seaworth ship = 
Good hull
Good equipment
Good crew

Good weld is = 
good welder
good welder
good welder

Which welding machine you use depents more on 
the tickness of the material and the amount of welds.. 

My MIG/Mag welder 250 amp 4 wheels for wire transport 
was about 2500 USD some years ago. For Euronauts pressure hull clear to small. 
This size submarines needs liquid cooled machines. 

regards Carsten

"Øystein Skarholm" <skarholm@gmail.com> schrieb:
> Anyway. if you are not a very good welder then DO NOT weld any
> critical welds yourself.
> 
> On 3/15/07, Dan. H. <jumachine@comcast.net> wrote:
> > Ray,
> >
> > For all my non water tight welds I used a 250 amp miller MIG welder I paid
> > around $1500 for about fifteen years ago.
> >
> > For all my more critical welds, I used a Lincoln "torpedo style" welder.
> > It's a very old motor generator set type of welder that sounds like a jet
> > engine when it's spooling up and running but supplies perfect DC current.  I
> > paid $25 for it about twenty years ago.  It's probably fifty years old.
> > Since better rectifiers are now available they're not used much now because
> > of the maintenance they required and the noise.
> >
> > Like most of the other advice you already got on the subject, it's not as
> > much the machine or what you pay for it.  Just so it's large enough to
> > handle the material thickness.  It's like that old joke of asking directions
> > to get to Carnegie hall.............  Practice Practice Practice
> >
> > Dan H.
> > ----- Original Message -----
> > From: "Ray Keefer" <psubs2001@yahoo.com>
> > To: <personal_submersibles@psubs.org>
> > Sent: Wednesday, March 14, 2007 7:23 PM
> > Subject: [PSUBS-MAILIST] Welders
> >
> >
> > > Hi,
> > >
> > > For lunch today I dropped by the local AirGas store to
> > > look at welders. I wanted something I can use on the
> > > farm  and to weld submarines.
> > >
> > > Submarines got him. I mentioned welding 1/4" HY-80
> > > steel. The guy visibally bristled with his superior
> > > expertise and said I would need $10,000+ equipment to
> > > weld.
> > >
> > > Out of my price league and probably dead wrong.
> > >
> > > You guys that have built subs, what welders do you
> > > have? Did you weld the pressure hull yourselves or did
> > > you part that out? If you parted out welding the
> > > pressure hull did you supply the welder or did the
> > > welder bring his own?
> > >
> > > Thanks,
> > > Ray
> > >
> > >
> > >
> > >
> > > ____________________________________________________________________________________
> > > Need Mail bonding?
> > > Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users.
> > > http://answers.yahoo.com/dir/?link=list&sid=396546091
> > >
> > >
> > >
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> 
> -- 
> Best Regards
> Øystein Skarholm
> www.ubat.no
> 
> 
> 
> 
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