Re: [PSUBS-MAILIST] old SCUBA cylinder

[Jim Rudholm <jimrudholm@gmail.com>]

I started SCUBA diving in the fall of 1959. Our area, central
California, had a fire extinguisher company that pressure tested and
certified industrial cylinders and SCUBA tanks. My first new tanks
were a pair of steel Kidde 72s, marked ICC3AA2400. Our local dive shop
would only go to 2250psi for a refill. We had some CO2 1800psi tanks
from military surplus that were wire wrapped to make them
shatterproof. This wrapping had to come off for a hydo test. Later in
my shop there was a tall oxygen cylinder with a first test stamp date
of 1914!
JimR

On Fri, Feb 10, 2012 at 1:17 PM, Sean T. Stevenson <cast55@telus.net> wrote:
> I think that most dive shops do not perform their own cylinder testing, but
> rather subcontract that service to companies which specialize in testing of
> not only SCUBA, but SCBA, fire protection and industrial gas cylinders.  In
> North America, cyclinders are certified according to Transport Canada and/or
> US Department of Transport regulations.  and the hydrostatic testers use the
> stamp information to determine what standard to test to.  I don't know
> whether the apparent absence of markings is due to this tank being so old
> that it predates the regulatory framework, or whether they are under there
> under a very thick coating of paint.  I doubt the former, but can anyone who
> was diving in the early 1970's verify this?
>
> -Sean
>
>
> On 2012-02-10 05:53, Smyth, Alec wrote:
>>
>> It depends where you are. When I lived in Argentina, the answer was yes,
>> the tank would be hydroed, almost certainly found to be just fine, and
>> enjoyed so long as it continued to pass its tests. Here in the States, I
>> have four such tanks in my garage but the local dive stores refuse to
>> even test them, although they ring clear as a bell when tapped (meaning
>> they likely have no rust).
>>
>> Alec
>>
>>
>>
>>
>>
>> From: owner-personal_submersibles@psubs.org
>> [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Sean T.
>> Stevenson
>> Sent: Thursday, February 09, 2012 11:47 PM
>> To: personal_submersibles@psubs.org
>> Subject: [PSUBS-MAILIST] old SCUBA cylinder
>>
>> While cleaning out the garage, I came across an old SCUBA cylinder, with
>> no apparent tank neck markings.  It does have a thick yellow paint job,
>> so it's possible that there are stamps which are covered, but I didn't
>> see any evidence of such marks on the neck.  The cylinder has a visual
>> inspection sticker on it which is dated April 1972.  I just bled the air
>> off but apparently it was full (!)  Does anyone know if the cylinder can
>> be salvaged / recertified for any purpose, or is it destined for
>> recycling?
>>
>> -Sean
>>
>
>
>
>
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