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Jon,
Can you explain this out of roundness evaluation, is it mearly a tolerance
that needs to kept with in a certain percentage of
exactness?
Brian
Brian,
As Sean stated, the PVHO document
is copyright protected so we cannot post it on the website. For what
it's worth, I purchased the document back in early spring and found it to be
seriously lacking in content so I requested and received a refund. The
document can essentially be divided into two topics, viewports and everything
else. If you have Stachiw's Handbook of Acrylics, you don't need ASME
PVHO for anything related to viewports since the subject matter is
identical. In fact, Stachiw's book is superior here because it includes
detailed descriptions of fabrication, his methods and experiments, rather than
ASME PVHO which only provides you with the standard. Also note that
Stachiw was chairman of the subcommittee creating standards for viewports at
ASME.
As far as "everything else" in relation to fabrication of the
pressure hull, 95% of ASME PVHO points you to ASME BPVC for specific
information, formulas, and documentation. The ASME BPVC (Boiler and
Pressure Vessel Code) is a huge document which costs $600 or more. In my
opinion, the ASME PVHO document should be edited and re-marketed as ASME PVHO
Viewports because that is about the only information within it which is
self-contained and does not require purchasing a separate and more expensive
document. For example, I purchased ASME PVHO when I was working on hull
opening reinforcement and window seat thickness requirements but the document
had nothing to offer here except that fabrication must comply with ASME
BPVC.
If you have Manned Submersibles (free online), Stachiw's
Handbook of Acrylics, and ABS Standards (free online), then I think you have
everything you need for a home-built sub that is not intended for
classification.
Jon
On 11/3/2010 1:51 AM, Brian Cox wrote:
Is
the ASME PVHO available on the psubs web site?
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