Brass Collar around cylinder necks.

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

rads - 25 Apr 2005 16:42 GMT

Afternoon all.

I have an old (OK very old) cylinder with a tapered valve, which has a
brass collar around the neck of the cylinder, onto which the cylinder
data is stamped.

That brass ring has a crack in it (actually cracked all the way
through).

Does the brass collar form an integral part of the strength of the
cylinder, or is it just somewhere to stamp the data?

Out of interest, it had a hydro test in November of this year, and has
only stood in my garage since, so I assume the ring was cracked at the
time of test, but wheter it was either overlooked, or noticed and not
relevant to the test, I know not.

TIA

David

Reply to this Message

Pete Melbourne - 25 Apr 2005 18:29 GMT

>Afternoon all.
>
[quoted text clipped - 12 lines]
>time of test, but wheter it was either overlooked, or noticed and not
>relevant to the test, I know not.

The ring is non structural, in fact it is meant to be replaced when
full. A friend who is a tester recently had to fail a cylinder because
on the previous test the test station had stamped the shoulder like
normal as the collar was full.

I would suggest you go and talk to the company that hydro'd it for
you, they may be willing to fit a new collar free/very cheap with
their stamps on it for November.

--
Pete
diving 'at' melbourne 'dot' me 'dot' uk

Reply to this Message

rads - 26 Apr 2005 08:44 GMT

>The ring is non structural, in fact it is meant to be replaced when
>full. A friend who is a tester recently had to fail a cylinder because
[quoted text clipped - 4 lines]
>you, they may be willing to fit a new collar free/very cheap with
>their stamps on it for November.

Thanks Pete,

I may have to also have to ask them why they put a date stamp on the
body of the cylinder, which now looks like it may have scrapped it.

Muppetts.

David

Reply to this Message