[PSUBS-MAILIST] Fw: used 80cf scuba tanks

[Rick Patton via Personal_Submersibles]

I agree, I'll check with them. Thanks for the input.

Rick

On Sun, Aug 9, 2015 at 2:17 PM, Tom Whent via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> It is only the 6351 alloy tanks that develop the cracks. Luxfer made them
> for certain until the late 80s. If they are made of that alloy it would be
> best to stay away from them regardless of any non destructive testing.
> Al80s are inexpensive and found everywhere. It makes no sense to settle for
> a recognized hazardous defect. That's my 2 cents.
>
> Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org>
> wrote:
>
> I had herd about the stress crack problem and the shop owner said that was
> mainly with tanks made by walter Kiddey. They can also check for those
> cracks using an electrical charge like magna flux testing as you can't see
> them very easily while doing a vip. The tanks do come with a resent hydro.
>
> Rick
>
> On Sun, Aug 9, 2015 at 10:12 AM, Tom J Whent via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> > If you do buy them, another important aspect for you to check is the
> alloy
> > of the cylinder. I can't recall what year Luxfer stopped manufacturing
> > them,
> > but any which are made from  6351-T6 aluminum alloy are prone to stress
> > failures in the neck/thread area. I don't think a reputable shop would
> sell
> > them, but it is certainly worth investigating. The failure of these tanks
> > can be catastrophic. The alloy will be marked on the cylinder.
> >
> > Tom
> >
> > -----Original Message-----
> > From: Personal_Submersibles [mailto:
> > personal_submersibles-bounces at psubs.org]
> > On Behalf Of Jon Wallace via Personal_Submersibles
> > Sent: Sunday, August 9, 2015 9:21 AM
> > To: Personal Submersibles General Discussion
> > <personal_submersibles at psubs.org>
> > Subject: Re: [PSUBS-MAILIST] Fw: 12 Volt Reversing Continuous Duty Silver
> > Contact Solenoid Relay for Winch Motor | eBay
> >
> >
> > Seems high to me for something manufactured in 89.  I'd ask for a new
> hydro
> > so it's good for five years.  Lowest new price in US seems to be divers
> > direct at $180, but if I were you I'd check out craigslist or similar
> > online
> > advertising where you will probably find a better price.
> >
> > Jon
> >
> >
> > On 8/9/2015 12:58 AM, Rick Patton via Personal_Submersibles wrote:
> > > I doubt I'll ever exceed that many cycles per launch so I'll just go
> > > with the 80,s. There shorter than the 100,s and that will leave more
> > > room for the 02 bottles on the pods. There is a dive shop here on the
> > > big island that has a couple of use aluminum 80,s for sale for $100
> > > each. They were made in 1989. That sound like an OK price to you guy's?
> > >
> > > Rick
> > >
> >
> > _______________________________________________
> > Personal_Submersibles mailing list
> > Personal_Submersibles at psubs.org
> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >
> >
> > ---
> > This email has been checked for viruses by Avast antivirus software.
> > https://www.avast.com/antivirus
> >
> > _______________________________________________
> > 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/20150809/3bba0002/attachment-0001.html>