RE: [PSUBS-MAILIST] Store Front and Product Survey

[irox <irox@ix.netcom.com>]

Hi Sean,

I have ASME PVHO-1-2002 here, it pretty much just reprints what's in
the Stachiw book, although I find it a little easier reading (mmmmm,
much shorter, bigger pictures).  But the values I'm looking for are
listed as "selected on the basis of structural requirements".  I think
maybe there is another pressure vessel standards (non-HO maybe?) which
contains this information.

So, the PVHO books I have are:

ASME PVHO-1-2002: Safety Standard for Pressure Vessels for
Human Occupancy.

and

ASME PVHO-2-2003: Safety standard for pressure vessels for
human occupancy in-service guidelines for PVHO Acrylic Windows.

Are they any others I should add to my collection?

Cheers,
  Ian.

-----Original Message-----
>From: "Sean T. Stevenson" <cast55@telus.net>
>Sent: Mar 6, 2008 6:41 PM
>To: personal_submersibles@psubs.org
>Subject: RE: [PSUBS-MAILIST] Store Front and Product Survey
>
>I don't have the book handy to check, but isn't that covered in ASME PVHO-1?
>
>-Sean
>
>
>Quoting irox <irox@ix.netcom.com>:
>
>> 
>> Hi Jon,
>> 
>> yes, I think we are talking about the same thing, the metal the
>> acrylic is mounted in.  I am using the Stachiw book, but it has
>> gaps in about the viewport housings/thru-hull mounts.  Things like
>> "K is selected on the basis of structural analysis" (where K is
>> some value I want to know), but no other information obtaining
>> or estimating K.
>> 
>> I'm currently researching spherical sector viewports with a
>> square edge.  The lip (side wall) of the viewport housing/thru-hull
>> will take part of the pressure of the viewport, as well as the
>> flat, contact surface.  (For flat viewports, the flat contact
>> surface takes all the pressure and not the lip, which is
>> just used to keep the viewport in place and for attaching the
>> retaining ring).  I cannot find information in the Stachiw
>> book about how thick the lip needs to be.
>> 
>> I plan to over build, but I'd like to know by how much I'm
>> over building.
>> 
>> Cheers,
>>   Ian.
>
>
>
>
>
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