Re: abt cso csc

I can come up with a few process conditions where you might want to ensure that a valve is not accidentally manually closed or opened. If you think about it carefully you'll probably figure it out.

CSO and CSC status can be applied to any valve. On a rising stem, a tight chain and padlock can be used. Removing the handle from rotaries can achieve the same thing. In cryogenic service, just leave the isulation off and a nice big block of ice will form, freezing the plug/disc/ball into position.

Paul

muktar wrote:

> hi,
> thks but sir i want to know actually in which type of valves it is used and
in which conditions they r used.
> regards
> muktar
>
> Paul Bowers <pbowers@pipingdesign.com> wrote:
> Car Seal Open and Car Seal Closed. It is a way of locking valves in one
> position.
Received on Fri Oct 29 08:26:00 2004