<div dir="ltr">Hank<div>I am amazed that a 1/8" wall was able to take that pressure without deforming enough to allow the seals on the ends to not fail! </div><div>Rick</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Nov 1, 2020 at 6:12 AM hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:13px"><div></div>
<div dir="ltr">Sean, I may do an anneal cycle because I have to machine the interior of the cylinder to accept the o-ring. Also I machine the 1 inch thick port for the housing. The tube will be cut shorter unless I need buoyancy.</div><div dir="ltr">Hank</div><div><br></div>
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On Sunday, November 1, 2020, 4:40:31 AM MST, Sean T. Stevenson via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:
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<div><div id="gmail-m_-6420347273871647539yiv7701234946"><div><br clear="none">The failure pressure is governed by the wall thickness to diameter ratio, plus the end conditions (bulkheads) for buckling modes. Longer tubes will be less stable, so you want it just long enough to accommodate your camera.<br clear="none"><br clear="none">I don't know what sort of condition your acrylic tubing comes in, but if you're cutting / machining it, I'd be inclined to anneal it if you can do so easily. Even if there is no issue with the hydrostatic pressure performance, annealing will give you a better chance of surviving an accidental impact when the tube is already stressed.<br clear="none"><br clear="none">Sean<br clear="none"><br clear="none">-------- Original Message --------<br clear="none">On Nov. 1, 2020, 04:25, hank pronk via Personal_Submersibles < <a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<blockquote><br clear="none"></blockquote></div><div id="gmail-m_-6420347273871647539yiv7701234946yqt35697"><div><div style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:13px"><div></div>
<div dir="ltr">David, I am just amazed how strong that acrylic is. Of coarse the small diameter is critical. The tube is 1\8 wall.</div><div dir="ltr">Hank</div><div><br clear="none"></div>
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On Saturday, October 31, 2020, 11:51:32 PM MDT, David Colombo via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:
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<div><div id="gmail-m_-6420347273871647539yiv7701234946"><div><div>Hank, that's impressive. How thick was the wall of the acrylic tube?<div>David</div></div><br clear="none"><div><div id="gmail-m_-6420347273871647539yiv7701234946yqt54126"><div dir="ltr">On Sat, Oct 31, 2020, 4:25 PM hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:13px"><div dir="ltr"><span><a rel="nofollow" shape="rect" href="https://www.youtube.com/watch?v=OL-0z9Rl8jo" target="_blank"></a></span><div><br clear="none"></div><div id="gmail-m_-6420347273871647539yiv7701234946m_-4490568393370295584ydpbd3bc260enhancr_card_5082852714" style="max-width:400px;font-family:YahooSans,Helvetica,Arial,sans-serif"><a rel="nofollow" shape="rect" href="https://www.youtube.com/watch?v=OL-0z9Rl8jo" style="text-decoration:none;color:rgb(0,0,0)" target="_blank"><table border="0" cellpadding="0" cellspacing="0" style="max-width:400px"><tbody><tr><td colspan="1" rowspan="1" width="400"><table border="0" cellpadding="0" cellspacing="0" width="100%" style="max-width:400px;border-width:1px;border-style:solid;border-color:rgb(224,228,233);border-radius:2px"><tbody><tr><td colspan="1" rowspan="1" valign="top" bgcolor="#000000" height="175" style="background-color:rgb(0,0,0);background-size:cover;border-radius:2px 2px 0px 0px;min-height:175px"><table border="0" cellpadding="0" cellspacing="0" style="width:100%"><tbody><tr><td colspan="1" rowspan="1" valign="top" bgcolor="transparent" style="background-color:transparent;border-radius:2px 2px 0px 0px;min-height:175px"><table border="0" height="175" style="width:100%;min-height:175px"><tbody><tr><td colspan="1" rowspan="1" style="text-align:left;padding:15px 0px 0px 15px;vertical-align:top"></td><td colspan="1" rowspan="1" style="text-align:right;padding:15px 15px 0px 0px;vertical-align:top"><div></div></td></tr></tbody></table></td></tr></tbody></table></td></tr><tr><td colspan="1" rowspan="1"><table align="center" border="0" cellpadding="0" cellspacing="0" style="background:rgb(255,255,255);width:100%;max-width:400px;border-radius:0px 0px 2px 2px;border-top:1px solid rgb(224,228,233)"><tbody><tr><td colspan="1" rowspan="1" style="background-color:rgb(255,255,255);padding:16px 0px 16px 12px;vertical-align:top;border-radius:0px 0px 0px 2px"><img src="https://s.yimg.com/nq/storm/assets/enhancrV2/23/logos/youtube.png" height="36" style="min-width: 36px; margin-top: 3px;"></td><td colspan="1" rowspan="1" style="vertical-align:middle;padding:12px 24px 16px 12px;width:99%;font-family:YahooSans,Helvetica,Arial,sans-serif;border-radius:0px 0px 2px"><h2 style="font-size:14px;line-height:19px;margin:0px 0px 6px;font-family:YahooSans,Helvetica,Arial,sans-serif;color:rgb(38,40,42);max-width:314px">Pressure Testing Camera Housing For New ROV Project</h2><p style="font-size:12px;line-height:16px;margin:0px;color:rgb(151,155,167)"></p></td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table></a></div><div dir="ltr">My new fly out ROV project.</div><div><br clear="none"></div><br clear="none"></div></div></div>_______________________________________________<br clear="none">
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