[PSUBS-MAILIST] Pressure Test Chamber

Thu Nov 19 19:55:38 EST 2015

Hi Alan,
Thanks for the offer, but at the moment I'm looking for M12 ones for my UW
caving light - I'll give them a call.

Cheers,
Steve

On Thu, Nov 19, 2015 at 3:18 PM, Alan James via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi Steve,
> no I didn't see that post. Thanks. I am getting a test chamber made up by
> a
> hydraulics firm & are having a port in the removable end plate to attach
> through hulls to the inside of. I think that's what you suggested,
> but your sketch didn't come through.
> I got the Blue Globe Cable Glands from Australia via Siemens NZ. Their
> distributor is
> Siemens Ltd. Automation & Drives
> 885 Mountain Highway
> 3153 Bayswater VIC
> so just down the road from you :)
> Could put some in my daughters pocket, if they aren't holding stock;
> but you wouldn't see them till 4th Nov. I have some M16 & some adapters
> 16-20mm.
> Cheers Alan
>
>
> ------------------------------
> *From:* Stephen Fordyce via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Thursday, November 19, 2015 4:41 PM
>
> *Subject:* Re: [PSUBS-MAILIST] Pressure Test Chamber
>
> Hi all,
> Just wondering if my last post on this subject went though?  I'm curious
> about whether the inside-out testing chamber is useful to anyone (and also
> to heat from Alan about where to get blue globe cable glands down under).
> Cheers,
> Steve
> On 16/11/2015 1:37 PM, "Stephen Fordyce" <stephen.fordyce at gmail.com>
> wrote:
>
> Hey guys,
> If you're going to make a small pressure chamber to go inside the big one
> just for testing penetrators, how about just making your small one so that
> you can screw the penetrator onto the inside of it?
> See sketch attached.
> I did this to test some cable gland/penetrators I made for underwater
> lights and it was very quick and easy to put together, it was small enough
> that I could use standard black plastic fittings from Bunnings as they were
> rated to something like 100m water depth.
> I also found that sealing the end of the cable with liquid electrical tape
> worked fine to prevent leaks through the cable stands at these pressures
> (but only for external pressure!).
> Cheers,
> Steve
> PS: where/how do you get blue globe cable glands down under??
> On 16/11/2015 6:38 AM, "Alan James via Personal_Submersibles" <
> personal_submersibles at psubs.org> wrote:
>
> Hank,
> you are right. My first port of call is to visit a large hydraulic
> service & manufacturing plant in case they have something
> lying around, or can suggest anything.
> I have been reading the penetrator section in
> "Busby". Apparently the European method is to take the cable
> right through the penetrator & the American method is to have
> pins going through. With the European method sometimes they
> inject resin under pressure inside the individual wire insulations
> to seal them in case the cable is sheared.
> G.L. require that there is no leak after a cable breakage, so I
> think the pin option is better in that case.
> Busby said most of the failures happened at the pin / wiring interface.
> I imagine it would be a weak point if you pulled on the cable.
> The idea of supporting this point with the silicone & casting over
> the top must have merit.
> Some manufacturers brazed washers to the pins to stop them
> extruding through the resin. I don't think I need to worry about that at
> 500ft,
> but maybe a few dots of brazing on the pins would help it a bit.
> Cheers Alan
>
> ------------------------------
> *From:* hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Monday, November 16, 2015 7:46 AM
> *Subject:* Re: [PSUBS-MAILIST] Pressure Test Chamber
>
> Alan,
> I was looking around NZ online for a hydraulic cylinder, you guys have it
> tough for surplus stuff.
> Hank
>
>
>
>
>
> On Sunday, November 15, 2015 11:04 AM, Alan James via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Thanks Hank,
> I like your idea of the small air chamber to test the through hulls,
> I was intending to screw them to the inside of a fitting in the end cap /
> lid.
> Will make inquiries re cylinders.
> Alan
>
> ------------------------------
> *From:* hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Monday, November 16, 2015 2:30 AM
> *Subject:* Re: [PSUBS-MAILIST] Pressure Test Chamber
>
> Hi alan,
> My cylinder is very unusual because it is light weight for a crane.  But
> yes, you leave the piston in, if it is double acting and either all of the
> rod or cut the excess off, I would leave it intact.  I can either use water
> or air, normally I think you would fill with water for safety also to
> locate a leak in your test part.  I use air because the cylinder is safe
> and rated.  If you find a double acting cylinder, you can also remove the
> piston and just use the piston nut and washer to hold the rod in from
> pushing out.  Then you can use the second port for filling with water while
> it vents out the opposite port.  Then you just need a tee with gauge and
> valve.  You can pressurize it with your scuba tank or a pressure washer.
> The scuba tanks make the most sense  if you fill with water first so you
> displace all the air.  You will need to make a small air chamber to go
> inside if your testing your penetrators.  Just take a pipe threaded at both
> ends, screw a cap on one end and a fitting at the other that will except
> your penetrator.   This way you have water pushing against the penetrator
> with air on the opposite side of the penetrator.  So long story, but try
> to find a double acting cylinder, either screw on top or tie rod type  with
> four long bolts is also fine.   Easy to do with no welding or machining.
> Hank
>
>
>
>
>
>
> On Saturday, November 14, 2015 10:26 PM, Alan James via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Adam / Hank,
> received Adam.
> Hank how does your hydraulic cylinder test chamber work?
> Have you left the piston & rod in it extended & then pressurize the
> cylinder with the piston?
> Do you fill your pressure chamber with water?
> Any details appreciated.
> Thanks
> Alan
>
> ------------------------------
> *From:* Adam via Personal_Submersibles <personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Sunday, November 15, 2015 4:42 PM
> *Subject:* Re: [PSUBS-MAILIST] Pressure Test Chamber
>
> Test
>
> On Sat, Nov 14, 2015 at 9:08 PM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
>
> Hank,
> that sounds a really good idea.
> Will have a look for something suitable during the week.
> Cheers Alan
>
> ------------------------------
> *From:* hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Sunday, November 15, 2015 2:37 PM
>
> *Subject:* Re: [PSUBS-MAILIST] Pressure Test Chamber
>
> Alan,
> Just buy a hydraulic cylinder, works a charm and there is no welding plus
> it is rated.
> Hank
>
>
>
>
>
> On Saturday, November 14, 2015 6:13 PM, Alan James via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Thanks Hugh,
> I am making up 8 lights (including navigational) & their connectors
> + thruster through hulls so will have a minimum of 29 items to test.
> It would probably pay for me to have my own.
> Do you want to sell your stuff? Otherwise I was going to head to a
> pipe manufacturer & see what bits I could pick up.
> Cheers Alan
>
> ------------------------------
> *From:* Hugh Fulton via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* 'Personal Submersibles General Discussion' <
> personal_submersibles at psubs.org>
> *Sent:* Sunday, November 15, 2015 10:08 AM
> *Subject:* Re: [PSUBS-MAILIST] Pressure Test Chamber
>
> Alan,
> I have a deal for you.
> I have the cylinder, pump and gauges but need the flanges made etc.
> You can use it whenever but I get to keep it.
> Hugh
>
>
>
>
> *From:* Personal_Submersibles [mailto:
> personal_submersibles-bounces at psubs.org] *On Behalf Of *Alan James via
> Personal_Submersibles
> *Sent:* Saturday, 14 November 2015 5:37 p.m.
> *To:* Personal Submersibles General Discussion
> *Subject:* [PSUBS-MAILIST] Pressure Test Chamber
>
> Hi all,
> I need to find or make a test chamber a minimum
> of around 6" internal diameter & about 12" high.
> I could go a lot larger than that if something was suitable.
> I don't need to test above 400 psi.
> Anything off the shelf that I could cannibalize?
> Or any ideas on construction.
> Cheers Alan
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20151120/7108f8fe/attachment-0001.html>