<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Beram,</div><div id="AppleMailSignature">that was interesting, I have seen large stainless balls formed</div><div id="AppleMailSignature">with water pressure.</div><div id="AppleMailSignature">Alan<br><br>Sent from my iPad</div><div><br>On 21/06/2017, at 8:40 PM, Beram Mahmoud via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="font-family: Verdana;font-size: 12.0px;"><div>
<div>
<div>Hello,</div>
<div> </div>
<div>well why not using the idea of hydroforming :<br>
<a href="http://www.colinfurze.com/hydroforming.html">http://www.colinfurze.com/hydroforming.html</a></div>
<div>Use a presssure washer with 200 bar and you got your 2900 psi...</div>
<div>By doing so you have no issue with expanding gases.</div>
<div> </div>
<div>Best regards</div>
<div> </div>
<div>Beram</div>
<div name="quote" style="margin:10px 5px 5px 10px; padding: 10px 0 10px 10px; border-left:2px solid #C3D9E5; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">
<div style="margin:0 0 10px 0;"><b>Gesendet:</b> Mittwoch, 21. Juni 2017 um 09:40 Uhr<br>
<b>Von:</b> "Stephen Fordyce via Personal_Submersibles" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
<b>An:</b> "Personal Submersibles General Discussion" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
<b>Betreff:</b> Re: [PSUBS-MAILIST] Pressure Test Chamber</div>
<div name="quoted-content">
<div>
<div>Hi Hugh & Alan,</div>
<div>Good point to consider, but it would depend on the flashpoint of the oil. SCUBA compressors do the exact combination of pressure/air/oil and don't explode. Diesel engines do too - sort of, anyway. Mineral oil designed for compressors would be a good option although pricey (AU$200 for 20L recently). Shell Corena P150 mineral oil is what I use.</div>
<div> </div>
<div>High pressure air is a mechanical hazard to be considered in and of itself. I'd highly recommend installing a relief valve (or device) on any test chamber or other vessel.</div>
<div> </div>
<div>Cheers,</div>
<div>Steve</div>
</div>
<div class="gmail_extra">
<div class="gmail_quote">On Wed, Jun 21, 2017 at 2:28 PM, Hugh Fulton via Personal_Submersibles <span><<a href="mailto:personal_submersibles@psubs.org" onclick="parent.window.location.href='personal_submersibles@psubs.org'; return false;" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:
<blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex;border-left: 1.0px rgb(204,204,204) solid;padding-left: 1.0ex;">
<div>
<div class="m_-331964700394927430WordSection1">
<p class="MsoNormal"><span style="color: rgb(31,73,125);font-family: Calibri , sans-serif;font-size: 11.0pt;">Alan,</span></p>
<p class="MsoNormal"><span style="color: rgb(31,73,125);font-family: Calibri , sans-serif;font-size: 11.0pt;">Never pressurise oil with air to those pressures. An explosion waiting to happen. Oxygen partial pressures!!</span></p>
<p class="MsoNormal"><span style="color: rgb(31,73,125);font-family: Calibri , sans-serif;font-size: 11.0pt;">If you want to do it use nitrogen.</span></p>
<p class="MsoNormal"><span style="color: rgb(31,73,125);font-family: Calibri , sans-serif;font-size: 11.0pt;">Hugh</span></p>
<p class="MsoNormal"><span style="color: rgb(31,73,125);font-family: Calibri , sans-serif;font-size: 11.0pt;"> </span></p>
<div>
<div style="border-width: 1.0pt medium medium;border-style: solid none none;padding: 3.0pt 0.0cm 0.0cm;">
<p class="MsoNormal"><b><span style="font-family: Tahoma , sans-serif;font-size: 10.0pt;">From:</span></b><span style="font-family: Tahoma , sans-serif;font-size: 10.0pt;"> Personal_Submersibles [mailto:<a href="mailto:personal_submersibles-bounces@psubs.org" onclick="parent.window.location.href='personal_submersibles-bounces@psubs.org'; return false;" target="_blank">personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>james cottrell via Personal_Submersibles<br>
<b>Sent:</b> Wednesday, 21 June 2017 3:34 PM<br>
<b>To:</b> Personal Submersibles General Discussion<br>
<b>Subject:</b> Re: [PSUBS-MAILIST] Pressure Test Chamber</span></p>
</div>
</div>
<div>
<div class="h5">
<p class="MsoNormal"> </p>
<div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3735">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: Verdana , sans-serif;font-size: 10.0pt;">Alan,</span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3749">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: Verdana , sans-serif;font-size: 10.0pt;"> </span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3751">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: Verdana , sans-serif;font-size: 10.0pt;">Pressure testing that high needs to be done with liquid not gas. High pressure air is VERY dangerous. A pressure washer pump using water would be a safer choice.</span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3779">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: Verdana , sans-serif;font-size: 10.0pt;"> </span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3778">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: Verdana , sans-serif;font-size: 10.0pt;">Greg</span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3719">
<p class="MsoNormal" style="background: white;margin-bottom: 12.0pt;"><span style="color: black;font-family: Verdana , sans-serif;font-size: 10.0pt;"> </span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3771">
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3770">
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3769">
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3775">
<div align="center" class="MsoNormal" style="background: white;text-align: center;">
<hr align="center" size="1" width="100%"></div>
<p class="MsoNormal" style="background: white;"><b><span style="color: black;font-family: Arial , sans-serif;font-size: 10.0pt;">From:</span></b><span style="color: black;font-family: Arial , sans-serif;font-size: 10.0pt;"> Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" onclick="parent.window.location.href='personal_submersibles@psubs.org'; return false;" target="_blank">personal_submersibles@psubs.org</a>><br>
<b>To:</b> <a href="mailto:personal_submersibles@psubs.org" onclick="parent.window.location.href='personal_submersibles@psubs.org'; return false;" target="_blank">personal_submersibles@psubs.org</a><br>
<b>Sent:</b> Tuesday, June 20, 2017 9:01 PM<br>
<b>Subject:</b> [PSUBS-MAILIST] Pressure Test Chamber</span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3768">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";"> </span></p>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3774">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">I am making a plastic container to fill with water & stand inside my</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">pressure chamber. There is a gap between the wall of the container</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">& the chamber which I intend to fill with oil. There will be about an</span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3773">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">inch of air at the top of the chamber & I'm using a scuba tank to</span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3772">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">pressurise the unit up to 3000psi.</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">Will car engine oil do to fill the gap between my plastic container &</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">the chamber wall, or do I need to go with a hydraulic fluid.</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">Am using the plastic container to keep water from rusting my test</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">chamber. (Aussie Steve's idea)</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">Cheers Alan</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";"> </span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">Sent from my iPad</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">_______________________________________________</span></p>
</div>
<div id="m_-331964700394927430yui_3_16_0_ym19_1_1498015667083_3780">
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";">Personal_Submersibles mailing list</span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";"><a href="mailto:Personal_Submersibles@psubs.org" onclick="parent.window.location.href='Personal_Submersibles@psubs.org'; return false;" target="_blank">Personal_Submersibles@psubs.org</a></span></p>
</div>
<div>
<p class="MsoNormal" style="background: white;"><span style="color: black;font-family: "Helvetica Neue";"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span></p>
</div>
<p class="MsoNormal" style="background: white;margin-bottom: 12.0pt;"><span style="color: black;font-family: "Helvetica Neue";"> </span></p>
</div>
</div>
</div>
</div>
</div>
<div id="m_-331964700394927430DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2">
<p class="MsoNormal"> </p>
<table border="1" cellpadding="0" class="m_-331964700394927430MsoNormalTable" style="border-width: 1.0pt medium medium;border-style: solid none none;">
<tbody>
<tr>
<td style="padding: 9.75pt 0.75pt 0.75pt;width: 41.25pt;" width="55">
<p class="MsoNormal"><a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon" target="_blank"><span style="text-decoration: none;"><img border="0" height="29" id="m_-331964700394927430_x0000_i1026" src="https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif" width="46"></span></a></p>
</td>
<td style="padding: 9.0pt 0.75pt 0.75pt;width: 352.5pt;" width="470">
<p class="MsoNormal" style="line-height: 13.5pt;"><span style="color: rgb(65,66,78);font-family: Arial , sans-serif;font-size: 10.0pt;">Virus-free. <a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link" target="_blank"><span style="color: rgb(68,83,234);">www.avast.com</span></a> </span></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"> </p>
</div>
</div>
</div>
</div>
</div>
<br>
_______________________________________________<br>
Personal_Submersibles mailing list<br>
<a href="mailto:Personal_Submersibles@psubs.org" onclick="parent.window.location.href='Personal_Submersibles@psubs.org'; return false;" target="_blank">Personal_Submersibles@psubs.org</a><br>
<a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br>
</blockquote>
</div>
</div>
_______________________________________________ Personal_Submersibles mailing list <a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></div>
</div>
</div>
</div></div>
</div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></body></html>