[PSUBS-MAILIST] Conning tower

[James Frankland via Personal_Submersibles]

Hi Brian,
Whats the end cap for on top?  Is that just to hold the shape while you
weld?  Or is it permenant?

When I did mine, which is about the same dimensions as yours, I made a
circular disk from 6mm plate and welded it into the bottom of the tower.
Then I could roll it around for easier positions.  I cut the plate out
later on.  I also made some flat disks from thick gauge steel and cramped
them to each viewport, to soak up some of the heat.  Then I had loads of
cups of tea in between runs.  No distortion.
Regards
James

On 22 September 2014 06:55, Brian Cox via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> I'm having welding concerns when it comes to my conning tower.  I have an
> approximate 24" diameter conning tower by about 20" tall by 1/4" thick,  I
> want to put 8 viewports all the way around (6" disks with appropriate
> flanges) ,I'm planning on welding to the reinforcing ring on the bottom
> and an end cap on the top,  but even with those on there isn't the heat of
> welding all those flanges going to warp the crap out of the whole area
> ?   Can any welders weigh in on my concerns, Thanks.
>
> Brian
>
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