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Re: Re: [PSUBS-MAILIST] K-350 Reinforcing Rings
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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