Jon,
Please note
these charts are for design of vessels that will experience an internal
pressure not an external pressure like a submersible. Other modes of
failure such as buckling predominate in submarine hull design so these tables
are not applicable for a PSUBS (other than the VBT or compressed air tanks).
R/J2
Respectfully,
Jay K. Jeffries
Andros Is., Bahamas
It is the mark of an educated mind to be able to
entertain a thought without accepting it.
- Aristotle
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of Jon Wallace
Sent: Sunday, January 28, 2007
6:13 PM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Steel
Pipe Hull
I'm not sure if this is what you are
looking for, but check out the PSUBS web forum. Go to www.psubs.org/webforum, then choose
the Design/Engineering category, then click on "Pressure Vessel Design
Charts".
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of djackson99@aol.com
Sent: Sunday, January 28, 2007
4:32 PM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Steel
Pipe Hull
Ok, it's the
same question as before but without the "F-glass" word that killed
the vis last time around.
Lets say we are building a 1ATM battery
box. If a steel pipe is rated at 1000 psi. The same pipe without frames,
will not be able to withstand 1000 psi of external force due to problems with
roundness. But there must be some ratio or formula that can define this
loss of performance for any
given diameter, plate thickness and roundness.
Does that make sense, and isn't there some chart that
mechanical engineers use for this when building all the piping that passes through pressure vessels? Where is
that chart?
Thanks
--Doug J
www.submarineboat.com
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