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