<html><head></head><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1489787051469_13099" dir="ltr"><span id="yui_3_16_0_ym19_1_1489787051469_13204">I agree with Hank on having the O2 inside when talking about a small tank (or multiple small tanks). The likelihood that an O2 tank will leak or blow up is pretty slim.</span></div><div id="yui_3_16_0_ym19_1_1489787051469_13099" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1489787051469_13099" dir="ltr"><span id="yui_3_16_0_ym19_1_1489787051469_15680">Even so, when talking about larger tanks (large enough to create a dangerous concentration if it DID leak) then the tank should really go outboard and have a shut off valve in the hull.</span></div><div id="yui_3_16_0_ym19_1_1489787051469_13099" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1489787051469_13099" dir="ltr"><span id="yui_3_16_0_ym19_1_1489787051469_15440">Also, in the event that the external tank needed to be shut off, a small internal tank for back up might come in handy.</span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1489787051469_13098"><br></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1489787051469_13098">Greg<br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1489787051469_16625" style="display: block;"> <div style="font-family: verdana, helvetica, sans-serif; font-size: 13px;" id="yui_3_16_0_ym19_1_1489787051469_16624"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1489787051469_16623"> <div dir="ltr" id="yui_3_16_0_ym19_1_1489787051469_16622"> <font size="2" face="Arial" id="yui_3_16_0_ym19_1_1489787051469_16627"> <hr size="1" id="yui_3_16_0_ym19_1_1489787051469_16626"> <b><span style="font-weight:bold;">From:</span></b> Rick Patton via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, March 17, 2017 5:36 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Fw: Gamma<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1489787051469_16628"><br><div id="yiv0543635113"><div dir="ltr" id="yui_3_16_0_ym19_1_1489787051469_16629">Can anyone recommend a good 02 flow meter without a regulator as I am coming into the sub as LP o2.<div id="yui_3_16_0_ym19_1_1489787051469_16630"><br></div><div>Rick</div></div><div class="yiv0543635113gmail_extra" id="yui_3_16_0_ym19_1_1489787051469_16631"><br><div class="yiv0543635113gmail_quote" id="yui_3_16_0_ym19_1_1489787051469_16636">On Sun, Mar 12, 2017 at 9:45 AM, hank pronk via Personal_Submersibles <span dir="ltr"><<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="yiv0543635113gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;" id="yui_3_16_0_ym19_1_1489787051469_16635"><div id="yui_3_16_0_ym19_1_1489787051469_16634"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;" id="yui_3_16_0_ym19_1_1489787051469_16633"><div id="yiv0543635113m_-7583571262102905523yui_3_16_0_ym19_1_1489347588064_11785"><span id="yui_3_16_0_ym19_1_1489787051469_16632">Seems to me a medical O2 tank inside the sub with a regulator venting into the compartment is the safest. I also carry a 35cuft O2 bottle to refill the medical tank.</span></div><div id="yiv0543635113m_-7583571262102905523yui_3_16_0_ym19_1_1489347588064_11785"><span>Hank</span></div> <div class="yiv0543635113m_-7583571262102905523qtdSeparateBR" id="yui_3_16_0_ym19_1_1489787051469_16637"><br><br></div><div class="yiv0543635113m_-7583571262102905523yahoo_quoted" style="display:block;" id="yui_3_16_0_ym19_1_1489787051469_16643"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;" id="yui_3_16_0_ym19_1_1489787051469_16642"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_ym19_1_1489787051469_16641"><span class="yiv0543635113" id="yui_3_16_0_ym19_1_1489787051469_16640"> <div dir="ltr" id="yui_3_16_0_ym19_1_1489787051469_16639"><font size="2" face="Arial" id="yui_3_16_0_ym19_1_1489787051469_16638"> On Sunday, March 12, 2017 1:28 PM, Sean T. Stevenson via Personal_Submersibles <<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br></font></div> <br><br> </span><div class="yiv0543635113m_-7583571262102905523y_msg_container" id="yui_3_16_0_ym19_1_1489787051469_16647"><div id="yiv0543635113m_-7583571262102905523yiv2815699543"><div id="yui_3_16_0_ym19_1_1489787051469_16646"><span class="yiv0543635113" id="yui_3_16_0_ym19_1_1489787051469_16645"><div dir="ltr" id="yui_3_16_0_ym19_1_1489787051469_16644">The NASA thing was because of the 100% oxygen environment, which makes an inferno out of anything burning. This was exascerbated by the fact that they had a tendency to use tons of velcro everywhere, which became a fuel source in the elevated oxygen environment. If your cabin environment is only air, as it should be, then the fire risk from oxygen piping exists only from the metals themselves or any entrained hydrocarbons. Machining operations which create sharp or thin edges within fittings can make the parts internally susceptible to burning in the presence of a source of ignition, which adiabatic heat from high rates of compression (i.e. a fast acting oxygen valve) in combination with residual hydrocarbons in the fittings / piping can represent. Also, all materials used in the personnel space, which includes but is not limited to the materials used in hoses, must be self-extinguishing / fire resistant. A hose burning will !
likely
cause it to rupture.</div>
<div dir="ltr" id="yui_3_16_0_ym19_1_1489787051469_16648">Sean<br></div>
<br><br></span><div class="yiv0543635113m_-7583571262102905523yiv2815699543gmail_quote" id="yui_3_16_0_ym19_1_1489787051469_16650"><span class="yiv0543635113" id="yui_3_16_0_ym19_1_1489787051469_16649">On March 12, 2017 12:40:45 PM MDT, Rick Patton via Personal_Submersibles <<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:</span><blockquote class="yiv0543635113m_-7583571262102905523yiv2815699543gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;" id="yui_3_16_0_ym19_1_1489787051469_16654"><span class="yiv0543635113" id="yui_3_16_0_ym19_1_1489787051469_16653">
<div dir="ltr" id="yui_3_16_0_ym19_1_1489787051469_16652">Thanks for the input guys.<div id="yui_3_16_0_ym19_1_1489787051469_16651"> My 02 bottles will be medical bottles that come already cleaned and be outside with 02 cleaned first stage regulators on them to go to LP right away and then I'll buy 02 cleaned LP hose to go to the SS threw hull fitting that's welded to the hull.</div><div id="yui_3_16_0_ym19_1_1489787051469_16655"> The sked 80 SS threw hull, 90 degree street ell and 1/4" turn stop valve weren't cleaned though so those should be easy to clean based on your input. I'll also go with factory 02 cleaned rubber hose to the flow meter so it would be just those three thing. </div><div id="yui_3_16_0_ym19_1_1489787051469_16656">Just out of curiosity though, if a fire occurred from carbon/contamination or whatever, would the fire just burn very briefly in the hose and then go out or would there be an explosion that would rupture the hose? As I recall, the unfortunate fire that occurred at NASA in the capsule with the three astronauts, wasn't that a quick fire with no explosion? </div><div><br></div><div>Rick</div><div><br></div></div></span><div class="yiv0543635113m_-7583571262102905523yiv2815699543gmail_extra"><br><div class="yiv0543635113m_-7583571262102905523yiv2815699543gmail_quote"><span class="yiv0543635113">On Sun, Mar 12, 2017 at 7:49 AM, Sean T. Stevenson via Personal_Submersibles <span dir="ltr"><<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>></span> wrote:<br></span><blockquote class="yiv0543635113m_-7583571262102905523yiv2815699543gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><span class="yiv0543635113"><div dir="ltr">Not all detergents are the same in this regard. You need something with a high affinity for hydrocarbons which is residue free. Simple green and formula 409 are mentioned in the Oxygen Hacker's Companion, but I always use orange TKO. I use vinegar on regulator and valve parts to remove corrosion, and will scrub these after the vinegar soak, and then wash them with an orange TKO solution as the next step before rinsing with distilled or filtered water. Cylinders just get a hot orange TKO solution wash, followed by a clean water rinse.</div>
<div dir="ltr">I wouldn't use solvents for cleaning lines for oxygen service, although you can if you subsequently flush the lines to remove all traces of the solvent afterwards. A quick detergent solution flush, followed by a clean water rinse, followed by blowing out with clean dry air or nitrogen should suffice. I like to pull vacuum on everything I put together to ensure that any remaining water or volatiles are evaporated, but that may not be practical for everyone.</div>
<div dir="ltr">Note also that I only ever bother with this for 100 % oxygen service at high pressures. Most of the time, I assemble tubing and fittings as delivered, blow it out once with nitrogen to remove any loose particles, and call it a day.</div>
<div dir="ltr">Sean<br>
</div>
<br><br></span><div class="yiv0543635113m_-7583571262102905523yiv2815699543gmail_quote"><span class="yiv0543635113"><span class="yiv0543635113m_-7583571262102905523yiv2815699543">On March 11, 2017 11:50:54 AM MST, Brian Cox via Personal_Submersibles <<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:</span></span><blockquote class="yiv0543635113m_-7583571262102905523yiv2815699543gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;">
<div style="font-family:Arial, sans-serif;font-size:10pt;"><span class="yiv0543635113m_-7583571262102905523yiv2815699543"><span class="yiv0543635113"><div>Rick, I haven't, but my understanding is that just soap and water is sufficient. Using a dish washing liquid. </div><div> </div></span><div>Brian<span class="yiv0543635113"><br><br>--- <a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a> wrote:<br><br>From: Rick Patton via Personal_Submersibles <<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>><br>To: Personal Submersibles General Discussion <<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>><br>Subject: Re: [PSUBS-MAILIST] Fw: Gamma<br>Date: Sat, 11 Mar 2017 08:09:48 -1000<br><br></span></div><span class="yiv0543635113"><div dir="ltr">has anyone 02 cleaned the insides of tubes or fittings before using the solvent method?<div><br></div><div>Rick</div></div></span></span><div><br><div><span class="yiv0543635113"><span>On
Sat, Mar 11, 2017 at 5:37 AM, Gregory Snyder via Personal_Submersibles <span dir="ltr"><<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>></span> wrote:<br></span></span><blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid;"><div><div></div><div>Indeed!!! Awesome boat!</div><div><div><span class="yiv0543635113"><span class="yiv0543635113m_-7583571262102905523yiv2815699543"><div><br>On Mar 11, 2017, at 7:19 AM, hank pronk via Personal_Submersibles <<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br><br></div></span></span><blockquote><div><div style="color:rgb(0,0,0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;background-color:rgb(255,255,255);"><span class="yiv0543635113"><span class="yiv0543635113m_-7583571262102905523yiv2815699543"><div><span>Thanks' guys, I am pretty pleased with how Gamma has turned out. I can not think of a single thin!
g I want
to do her now. I have always had a diesel engine in mind but that might have been a want, not a need.</span></div><div><span>Hank</span></div> <div><br><br></div></span></span><div style="display:block;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><span class="yiv0543635113"><span class="yiv0543635113m_-7583571262102905523yiv2815699543"> <div dir="ltr"><font face="Arial" size="2"> On Friday, March 10, 2017 7:25 PM, Douglas Suhr via Personal_Submersibles <<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br></font></div> <br><br> </span></span><div><span class="yiv0543635113"><span class="yiv0543635113m_-7583571262102905523yiv2815699543">Beautiful Hank! What a fine sub you've got there. ~ Doug S.<br><br></span></span><div><span class="yiv0543635113m_-7583571262102905523yiv2815699543"><span class="yiv0543635113"><br>On 3/10/17, Rick Patton via Personal_Submersibles<br></span><span class="yiv0543635113"><<a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br>> Lookin good Hank!<br>><br>> Rick<br>><br>> On Fri, Mar 10, 2017 at 1:58 PM, Alan via Personal_Submersibles <<br></span><span class="yiv0543635113">> <a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br>><br>>> Thanks Hank,<br></span></span><span class="yiv0543635113">>> I enjoy watching!
the
videos. All the best for the ensuing dive & look</span><div><div class="yiv0543635113m_-7583571262102905523yiv2815699543h5"><span class="yiv0543635113"><br>>> forward<br>>> to hearing the report.<br>>> Alan<br>>><br>>> Sent from my iPad<br>>><br>>> On 11/03/2017, at 11:28 AM, hank pronk via Personal_Submersibles <<br></span><div><div class="yiv0543635113h5">>> <a rel="nofollow" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br>>><br>>> New video of arm assembly on Gamma.<br>>> Hank<br>>><br>>><br>>> On Friday, March 10, 2017 3:27 PM, xxx xxxxx <<a rel="nofollow" ymailto="mailto:mp13@live.ca" target="_blank" href="mailto:mp13@live.ca">mp13@live.ca</a>> wrote:<br>>><br>>><br>>> <a rel="nofollow" target="_blank" href="https://www.youtube.com/watch?v=S9HGAFanbNE">https://www.youtube.com/watch? v=S9HGAFanbNE</a><br>>> <Image 2017-03-10 at 3.27 PM.jpg><br>>><br>>><br>>> <Image 2017-03-10 at 3.27 PM.jpg><br>>!
><br>>> ______________________________ _________________<br>>>
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