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<div>Emile, I would weigh the part then pressurize it for for several hours then weigh it again. If there is water absorbed it may still be in the part after removing it from the chamber. You can also put the part under stress by bending it over a fixture, then pressure test it while under stress. You can stress the part to near failure in a fixture then pressure test it for several days. If it can handle that then your good to go, I would think. </div><div>I would bet the propellers will work just fine at 5,000 psi.</div><div>Hank</div><div><br></div>
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On Thursday, May 10, 2018, 1:55:09 AM MDT, emile via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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#yiv7608311343 </style><div><div class="yiv7608311343WordSection1"><p class="yiv7608311343MsoNormal"><span lang="EN-US" style="">Thanks for the respons .</span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style="">Testing sounds logical but it should be long term and it is difficult to measure the water ingress.</span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style=""> </span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style="">Polyester yachts do have a osmosis problem when they sit all year in the water. </span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style=""> </span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style="">We use thin fiberglass plate in the rim thrusters and we want to use it in a deep diving ROV. </span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style=""> </span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style="">Br, Emile</span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style=""> </span></p><div class="yiv7608311343yqt6236011708" id="yiv7608311343yqt81446"><div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm;"><p class="yiv7608311343MsoNormal"><b><span style="font-size:10.0pt;">Van:</span></b><span style="font-size:10.0pt;"> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>Namens </b>Alan via Personal_Submersibles<br clear="none"><b>Verzonden:</b> woensdag 9 mei 2018 23:39<br clear="none"><b>Aan:</b> Personal Submersibles General Discussion<br clear="none"><b>Onderwerp:</b> Re: [PSUBS-MAILIST] material question</span></p></div></div><p class="yiv7608311343MsoNormal"> </p><div><p class="yiv7608311343MsoNormal">Hi Emile,</p></div><div id="yiv7608311343AppleMailSignature"><p class="yiv7608311343MsoNormal">my brother-in-laws fibreglass yacht has been sitting in the harbour</p></div><div id="yiv7608311343AppleMailSignature"><p class="yiv7608311343MsoNormal">for at least 30 years, so pretty impervious to water.</p></div><div id="yiv7608311343AppleMailSignature"><p class="yiv7608311343MsoNormal">The glass in the fibre would not crush, but the resin around it would squash</p></div><div id="yiv7608311343AppleMailSignature"><p class="yiv7608311343MsoNormal">a little under that pressure. I would think the resin would seal any exposed </p></div><div id="yiv7608311343AppleMailSignature"><p class="yiv7608311343MsoNormal">fibres by squashing around them when put under that kind of pressure.<br clear="none">What are you sending down that deep?</p></div><div id="yiv7608311343AppleMailSignature"><p class="yiv7608311343MsoNormal">Alan<br clear="none">Sent from my iPad</p></div><div><p class="yiv7608311343MsoNormal" style="margin-bottom:12.0pt;"><br clear="none">On 10/05/2018, at 5:34 AM, emile via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt;"><div><p class="yiv7608311343MsoNormal"><span style="">Hi All, </span></p><p class="yiv7608311343MsoNormal"><span style=""> </span></p><p class="yiv7608311343MsoNormal"><span style="">Material question:</span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style="">Can prefabricated epoxy/glassfibre plate material (like PCB) withstand 5000M / 18.000Ft presurised water? </span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style="">Or will it be impregnated after a while?</span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style=""> </span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style="">Thanks in advance</span></p><p class="yiv7608311343MsoNormal"><span lang="EN-US" style=""> </span></p><p class="yiv7608311343MsoNormal"><span style="">met vriendelijke groet, with best regards</span></p><p class="yiv7608311343MsoNormal"><span style=""> </span></p><p class="yiv7608311343MsoNormal"><span style="">Emile D.L. van Essen</span></p><p class="yiv7608311343MsoNormal"> </p></div></blockquote><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt;"><div><p class="yiv7608311343MsoNormal"><span style="font-size:12.0pt;">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span></p></div></blockquote></div></div></div></div><div class="yqt6236011708" id="yqt87294">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div></div>
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