Theoretically it would give you, what...a sixty percent increase? But
you'd have to recalculate and redesign all the penetrations and
viewports to match.
As someone who welds on
submarines for a living, I'd have to agree
with Dan H's methodology
for welding the rings. It is a good way to
minimize the stress.
With regard to what Leon contributed, I think
it's imperative that
anyone even considering building any sort of
pressure vessel knows
these things. Understanding the stress that
welding causes on steel
is VERY important to know, especially when
your life is being
supported by it. While there are a few methods of
stress reduction,
not all are readily available to all PSubbers. The
best idea, if
you haven't spent any time welding professionally, or
even if you
have, is to read over some corporate welding requirements.
Anything
you can get your hands on. A lot of them specify pre-heat
and
interpass temperatures, joint design specifications, and many
other
things. I think the American Bureau of Shipping documentation
on
Hyberbaric Chambers has a lot of these things in there as
well.
If you have the time, sit in on a metallurgy class
at a local college.
Or attend as a student. If you're welding
yourself, there are SO MANY
things you can and should learn before
tackling such a project.
One question I have for Dan,
Leon, or anyone else who knows:
Has anyone constructed a K-350
submarine out of HY-80 steel or any
other material? Would that
increase it's depth capacity? What do the
plans
specify?
Thanks,
-Tom
On
9/10/06,
ShellyDalg@aol.com <
ShellyDalg@aol.com>
wrote:
>
>
> Hello. One more thing. I
asked the question about stress relieving the
> finished hull
also. There are some companies that have huge ovens to do just
>
that. One in Texas that makes the tank heads I want does it on tank
heads
> for high pressure, and will even do a whole
tank.
> Their oven is very large. I think stress relieving is
required on tanks that
> store very cold things and create
problems with cold brittle stress.
> The company is " Fort Worth
F & D Tank Head " --great prices there.
> Frank
Dalgleish.
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