Re: [PSUBS-MAILIST] hull welding

["Mark Steed" <plutomark@mail.astate.edu>]

Dan-I could not agree more. I have a lot of welding experience and 
am certified on pipe. Everything you say is correct and I commend 
you on your knowledge. Give me a can of electrodes. I'll take the 
old stick everytime.  Mark Steed 


---------- Original Message ----------------------------------
From: Dan h <machine@epix.net>
Reply-To: personal_submersibles@psubs.org
Date: Mon, 29 Apr 2002 19:29:30 -0400

>You can TIG, but since you can get inside and out, it's not really
>necessary.  Grind a good bevel from both edges, on both sides.  
Fit them
>up so you have a sixteenth to an eight inch gap between the 
mating hull
>parts.  Weld one pass around the interior.  Next, grind the root 
of the
>exterior bevels until you hit the weld that you laid on from the
>interior.  Now just keep laying on weld passes until you filled 
the the
>appropriate height on both the interior and exterior.
>
>Be careful with MIG though.  It's real easy to get a cold joint,
>especially at the start of a pass.  Stick is slower and smokier, 
but
>much more of a sure thing.  TIG is great, but really slow.
>
>Dan H.
>
>bruno masse wrote:
>
>> i would like to now when you weld the hull do you do tig weld 
for the
>> first pass to have good penetration after you finish with mig? 
thank
>> you
>
>