<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr">Welcome aboard Jeff! Greg Cottrell is my go-to expert on viewports, although I don’t think he’s on the email list. He used to work for an outfit in Maryland called Precision Plastics. Although Greg is no longer there, I believe Precision might still make you viewports if you provided them a drawing, without them being certified. </div><div dir="ltr"><br></div><div dir="ltr">Best,</div><div dir="ltr">Alec</div><div dir="ltr"><br><blockquote type="cite">On Mar 16, 2024, at 1:16 PM, Sean T. Stevenson via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">Hello Jeff.<br><br>A few important resources for you to check out:<br><br>1) Rules for Building and Classing Underwater Vehicles, Systems, and Hyperbaric Facilities - American Bureau of Shipping.<br><br><a href="https://ww2.eagle.org/content/dam/eagle/rules-and-guides/current/special_service/7-rules-for-building-and-classing-underwater-vehicles,-systems-and-hyperbaric-facilities-2024/7-uwvs-rules-jan24.pdf">https://ww2.eagle.org/content/dam/eagle/rules-and-guides/current/special_service/7-rules-for-building-and-classing-underwater-vehicles,-systems-and-hyperbaric-facilities-2024/7-uwvs-rules-jan24.pdf</a><br><br>1) Handbook of acrylics for submersibles, hyperbaric chambers, and aquaria. - Jerry D. Stachiw<br><br><a href="https://www.amazon.com/Handbook-Acrylics-Submersibles-Hyperbaric-Chambers/dp/1930536151">https://www.amazon.com/Handbook-Acrylics-Submersibles-Hyperbaric-Chambers/dp/1930536151</a><br><br>2) Safety standard for pressure vessels for human occupancy (PVHO-1), published by the American Society of Mechanical Engineers (ASME)<br><br><a href="https://www.asme.org/codes-standards/find-codes-standards/pvho-1-safety-standard-pressure-vessels-human-occupancy/2023/drm-enabled-pdf">https://www.asme.org/codes-standards/find-codes-standards/pvho-1-safety-standard-pressure-vessels-human-occupancy/2023/drm-enabled-pdf</a><br><br>As for manufacturers, an internet search will likely reveal a number of acrylic suppliers who will manufacture viewports. Purchasing will inevitably be more expensive than DIY, because a manufacturer can only sell you a PVHO-1 certified viewport for liability reasons. For a PSub, you can achieve the intent without the exhaustive documentation requirements of PVHO-1 by designing to the standard, using the correct slush cast PMMA material, following the appropriate annealing schedule after forming, and then by subsequently testing. Per the PSubs ethos, comply with the commercial rules as far as is possible / practicable.<br><br>Sean<br><br>-------- Original Message --------<br>On Mar 16, 2024, 10:52, Jefferson Tortorelli via Personal_Submersibles < personal_submersibles@psubs.org> wrote:<blockquote class="protonmail_quote"><br>
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<p class="MsoNormal">Hi:<o:p></o:p></p>
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<p class="MsoNormal">I am new to this organization and am currently in the design phase of a two person submersible. I am looking for information on obtaining acrylic viewports or learning (if possible) how to fabricate my own.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Jeff<b><o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-ligatures:none">Jefferson Tortorelli<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:none">Tortorelli Creations<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:none">4910 Santa Anita Avenue<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:none">El Monte, CA 91731<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:none">Cell: 909-908-3795<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:none">Shop: 909-370-3131<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:none">Website: <a href="http://www.Tortorelli.com">
www.Tortorelli.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-ligatures:none">Instagram: @tortorellicreations<o:p></o:p></span></p>
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