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Subject: Re: burst disks
Date: Mon, 6 Jan 97 21:19:50 -0800
From: Jammer <jammer@oz*.ne*>
To: "Tech List" <techdiver@terra.net>

Hi, Bill!

>The reason the plug is replaced with the disk is that the bottom inside edge
>of the plug is sharp when it is new.  The sharp edge causes the disk to
>rupture in near pure shear at a predictable pressure.  If you reuse plugs
>this sharp edge becomes progressively rounded and the disks begin to rupture
>in a combination of tension and shear which causes the rupture pressure to
>increase.
>

At last, a real answer. Thanks, Bill.

>Sorry to bust your conspiracy bubble  : )
>
>PS  I agree that they are a hazardous as well as a  waste of time and money
>in scuba tanks.


---------
"Huh?"
       --Jammer, 1992
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