[PSUBS-MAILIST] PVHO rules

[hank pronk via Personal_Submersibles]

 Sean,I have Stachiw's book and I have reviewed all the temperature and minimum soak times for the annealing process etc.  There is no chart for forming temperatures and soak times.  There is mention in the forming section of maximum forming temperature but no details.  I may have missed it.Hank
    On Sunday, April 21, 2019, 8:48:54 AM MDT, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hank - are you referring to the ASME Safety Standard for Pressure Vessels for Human Occupancy (PVHO-1), or something else?  PVHO-1 exhaustively details required window geometries, but the fabrication section is relatively short.  It does, however, outline the required annealing schedules.  I was going to sit down today and try to answer your earlier email about your intended window.  Between PVHO-1 and Jerry Stachiw's Handbook of Acrylics, all the info you need is in there.

The PVHO standards are available directly from ASME:

https://www.asme.org/products/codes-standards/pvho1-2016-safety-standard-pressure-vessels-human



Stachiw's book I imagine is available from a variety of distributors.

Sean

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
 On Sunday, April 21, 2019 8:11 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

Hi All,
I am looking for the actual PVHO rules for Acrylic forming.  I can find all the references to the rules but not the rules.  I am planning to make a 5 inch thick 60 degree Hemispherical segment either from forming  or from machining out of a thick slab.  I prefer to form it because I will need an oven to heat treat it after anyways, but I don't want to form it without the rules.
Hank


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