[PSUBS-MAILIST] Fw: Gamma

Fri Mar 17 17:34:26 EDT 2017

Can anyone recommend a good 02 flow meter without a regulator as I am
coming into the sub as LP o2.

Rick

On Sun, Mar 12, 2017 at 9:45 AM, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> 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.
> Hank
>
>
> On Sunday, March 12, 2017 1:28 PM, Sean T. Stevenson via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> 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.
> Sean
>
>
> On March 12, 2017 12:40:45 PM MDT, Rick Patton via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Thanks for the input guys.
>  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.
>  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.
> 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?
>
> Rick
>
>
> On Sun, Mar 12, 2017 at 7:49 AM, Sean T. Stevenson via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> 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.
> 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.
> 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.
> Sean
>
>
> On March 11, 2017 11:50:54 AM MST, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.
> org <personal_submersibles at psubs.org>> wrote:
>
> Rick,           I haven't, but my understanding is that just soap and
> water is sufficient.  Using a dish washing liquid.
>
> Brian
>
> --- personal_submersibles at psubs. org <personal_submersibles at psubs.org>
> wrote:
>
> From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs.
> org <personal_submersibles at psubs.org>>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.
> org <personal_submersibles at psubs.org>>
> Subject: Re: [PSUBS-MAILIST] Fw: Gamma
> Date: Sat, 11 Mar 2017 08:09:48 -1000
>
> has anyone 02 cleaned the insides of tubes or fittings before using the
> solvent method?
>
> Rick
>
> On Sat, Mar 11, 2017 at 5:37 AM, Gregory Snyder via Personal_Submersibles
> <personal_submersibles at psubs. org <personal_submersibles at psubs.org>>
> wrote:
>
> Indeed!!! Awesome boat!
>
> On Mar 11, 2017, at 7:19 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.
> org <personal_submersibles at psubs.org>> wrote:
>
> 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.
> Hank
>
>
> On Friday, March 10, 2017 7:25 PM, Douglas Suhr via Personal_Submersibles <personal_submersibles at psubs.
> org <personal_submersibles at psubs.org>> wrote:
>
>
> Beautiful Hank! What a fine sub you've got there. ~ Doug S.
>
>
> On 3/10/17, Rick Patton via Personal_Submersibles
> <personal_submersibles at psubs. org <personal_submersibles at psubs.org>>
> wrote:
> > Lookin good Hank!
> >
> > Rick
> >
> > On Fri, Mar 10, 2017 at 1:58 PM, Alan via Personal_Submersibles <
> > personal_submersibles at psubs. org <personal_submersibles at psubs.org>>
> wrote:
> >
> >> Thanks Hank,
> >> I enjoy watching! the videos. All the best for the ensuing dive & look
>
> >> forward
> >> to hearing the report.
> >> Alan
> >>
> >> Sent from my iPad
> >>
> >> On 11/03/2017, at 11:28 AM, hank pronk via Personal_Submersibles <
> >> personal_submersibles at psubs. org <personal_submersibles at psubs.org>>
> wrote:
> >>
> >> New video of arm assembly on Gamma.
> >> Hank
> >>
> >>
> >> On Friday, March 10, 2017 3:27 PM, xxx xxxxx <mp13 at live.ca> wrote:
> >>
> >>
> >> https://www.youtube.com/watch? v=S9HGAFanbNE
> <https://www.youtube.com/watch?v=S9HGAFanbNE>
> >> <Image 2017-03-10 at 3.27 PM.jpg>
> >>
> >>
> >> <Image 2017-03-10 at 3.27 PM.jpg>
> >! >
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> >>
> >
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