[PSUBS-MAILIST] Fw: Gamma

[Alan via Personal_Submersibles]

Rick,
a while back I was trying to determine how necessary cleaning was 
for low pressure O2 systems. I couldn't find any incident related to
low pressure systems. However second stage regulators are O2
cleaned so I guess it matters. Below is an excerpt from the O2 hackers
manual. 
Alan
 
On Oxygen Cleaning:

"One way or another, it seems clear that there are a lot of people doing partial pressure mixing of nitrox who are not using professionally 02 clean tanks or hydrocarbon free air and appear to be getting away with it. Does that mean you should?
Don't expect me to tell you it's OK. It's one of those things that you may get away with ten or a hundred times, but if on the thousandth time it blows up in your face you¹re going to feel pretty stupid in those last micro-seconds.
Rather, take it to mean one doesn't have to be overly intimidated. Oxygen cleaning, it appears, is not rocket science, as we've been led to believe in the past, but rather kitchen science - a matter of detergent, hot water and common sense. The important thing is to use cleaning agents that will remove any hydrocarbons, but not contribute any themselves. Flammable solvents, obviously are out.

The Navy dive manual. the CGA, and other technical publications have leaned towards heavy duty solvents and detergents such as anhydrous technical grade trisodium phosphate, trichlorethylene and liquid freon, followed by rinsing with deionized water. These are hard to find, environmentally suspect in some cases, and, in the case of trichlorethylene, leave a bad smell in the tank that's almost impossible to get rid of.

Fortunately, there are some much milder and more easily obtained detergents that are popular with tech divers and seem to do the job just fine. Two of the most frequently mentioned are Simple Green, which can be used diluted, and Formula 409 which is usually used straight. The tank is filled with a hot solution of the detergent of choice, shaken, scrubbed, or tumbled, then thoroughly rinsed and dried.

Cleaning tanks can be done better, and a whole lot easier, if one improvise a washing and drying stand that will hold the tank upside down and a few inches off the ground, so it can drain freely. Then the tank can be throughly rinsed by sticking a hose up inside and blasting it out with flowing hot water. "


Sent from my iPad

> On 12/03/2017, at 7:50 AM, Brian Cox via Personal_Submersibles <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 wrote:
> 
> From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <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> wrote:
> Indeed!!! Awesome boat!
> 
> On Mar 11, 2017, at 7:19 AM, hank pronk via Personal_Submersibles <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 thing 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> 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> wrote:
> > Lookin good Hank!
> >
> > Rick
> >
> > On Fri, Mar 10, 2017 at 1:58 PM, Alan via Personal_Submersibles <
> > 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> 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
> >> <Image 2017-03-10 at 3.27 PM.jpg>
> >>
> >>
> >> <Image 2017-03-10 at 3.27 PM.jpg>
> >>
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