Re: [PSUBS-MAILIST] acrylic sphere/lithium Hydroxide

[Coalbunny <coalbunny@vcn.com>]

What I have a problem with is they usually won't touch it unless they
are certified in submersible design.  And those guys are VERY expensive.
Carl


"Gary R. Boucher" wrote:
> 
>      I'm not arguing against a P.E. looking at one's design.  I think it is
> good in some cases, essential in others.  But, acrylic viewports and domes
> are more cookbook than math at this point in time.  Using the PVHO
> standards, anyone technically competent can in less than five minutes
> obtain a thickness for a viewport of a given outside diameter, supported
> diameter, proposed operating depth, and temperature range.  Many years of
> research and extensive testing have gone into acrylic viewports and domes.
>      I manufactured my own viewports for my sub, but I had no trouble
> getting quotes from reputable manufactures.  I think that if a manufacturer
> got the idea that a builder had absolutely no idea what was going on, he
> might have reservations.  But, much of their liability protection is in
> manufacturing acrylic that conforms to a universally accepted standard (PVHO).
> 
> G. Boucher
> 
> At 07:31 PM 9/9/2002, you wrote:
> >Surely you understand the liability of producing acrylic for a PVHO. No
> >reputable acrylic manufacturer would produce viewports or domes without
> >calculations. Please don't design any manned submersible without having a PE
> >run the calculations....surely your life is worth more that a few hundred
> >dollars!
> >
> >Best Regards:
> >Phillip Janca
> >Chairman
> >HyperTec, Inc.
> >World Leader in Hyperbaric Technologies
> >800-218-3588
> >940-564-5600
> >940-564-5609 Fax
> ><A HREF="http://www.hypertec.ws">http://www.hypertec.ws</A>

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