[PSUBS-MAILIST] 12'' Pipe coupling

Fri Mar 20 02:58:29 EDT 2015

Rick, got it in California. 
Best Regards,
David Colombo

Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------
From: Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> 
Date: 03/19/2015  10:20 AM  (GMT-08:00) 
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Subject: Re: [PSUBS-MAILIST] 12'' Pipe coupling 

I have posted a couple of messages over the last few weeks and it doesn't seem to go threw. Not sure if this will either. I tried sending Jon an email at jonw at psubs.org and it came back. Let me know if anyone gets this.

Rick 

On Thu, Mar 19, 2015 at 12:38 AM, glen brown via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Thanks James 
You got me thinking ,maybe a sleeve with 4 o rings that can just slide over with something that can keep it in position.

Glen

On Thu, Mar 19, 2015 at 11:47 AM, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Hi Glen,
I think it looks like a good idea.  A bit of extra security on the seal.  I cocked up making that seal as per the plans so did mine a different way.  However, I was never keen on the original design anyway.  I believe George had at least one battery pod flood at some point. 

You could even maybe make your own version of that coupling.  A ring of rubber say 2" wide covering the joint with a suitably made stainless ring cramped over it.  Would be easy to make.  You could even maybe use a piece of rubber cut from an old inner tube and stretched over.  Not very sophisticated but would probably work and cheaper?  Also there wouldn't be anywhere for water to collect and there would be no metal contact to rub your paint off.  Just a thought.

Kind Regards
James

On 19 March 2015 at 09:30, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
That's OK, sorry I wasn't much help.
I have book marked this site
http://prevco.com/products/subsea-housings/seal-configuration/single-face-seal
They are experts in sealing underwater housings. There are several examples
of sealing methods, & their pros & cons are discussed. 
Alan

From: glen brown via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Thursday, March 19, 2015 9:04 PM

Subject: Re: [PSUBS-MAILIST] 12'' Pipe coupling

thanks for the input Alan

On Wed, Mar 18, 2015 at 9:52 PM, glen brown <gbrown091 at gmail.com> wrote:
I think they would work better externally Alan the wet switches are a must ,but I must admit the pod seal arrangement gives me sleepless 
nights.I have also just cut my CT off and re mated the hatch and re cut the o ring groove to hold a 9 mm od o ring. Maybe I am getting a bit paranoid. As to the cricket looking good, do the Americans actually play unprotected sport?

On Wed, Mar 18, 2015 at 9:24 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Another thought Glen,
those seals for pipes would be designed for internal pressure.
Are they OK for external also?
Alan

From: glen brown via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Thursday, March 19, 2015 7:40 AM
Subject: Re: [PSUBS-MAILIST] 12'' Pipe coupling

Alan
Its 316 ss ,I was thinking of assembling with grease there is more than enough space to fit it ,you get some of the fittings with triple 
seals up to 2000 psi
Glen.

On Wed, Mar 18, 2015 at 8:13 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Glen,
as long as salt water doesn't sit in it after a dive
& cause corrosion. ( I suspect it must) Or clamping it on doesn't
wear in to your paint work & expose the metal
also to corrosion.
Alan

From: glen brown via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Thursday, March 19, 2015 6:58 AM
Subject: [PSUBS-MAILIST] 12'' Pipe coupling

I am planing on as an "extra safety" for my K350 B pods end caps ,covering the join between the end caps and the pod with a hp pipe join coupling.

Any comments most welcome.
 Glen

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