RE: PIping Trivia

From: <Ben>
Date: Fri Oct 12 2001 - 00:28:00 EDT

What about use of Figure-8 blinds made of carbon steel? I would think the exposed portion would rust in most environments, thus destroying the gasket sealing surface.

Ben

-----Original Message-----
From: Paul Bowers [mailto:pbowers@pipingdesign.com] Sent: Thursday, October 11, 2001 9:01 PM To: <a href="/group/PipingDesign/post?postID=zt5MV-5Md6-CHwamFr0RDAmuDoSx1kxqP4iVjX8TPyLoU9PS4nCb0H668OiIPqKZyjMEmRlkeD3gOSh0CuBm7FOsQO8">PipingDesign@yahoogroups.com</a> Subject: Re: [PipingDesign] PIping Trivia

> ======================================================
>
> Q> Fugure 8 (spectacle blind) and paddle type blanks & spacers -
when do we use
> them?
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=
>
> Ans>
> Figure 8 flanges are used for positive isolation of the lines
[during shutdown]
> where we suspect some valves to pass the fluid which may cause
hindrance to the
> work in the downstream of the valve. This is a safety point.

It is relatively easy to see from a distance a figure 8's position (open or closed). With a paddle blind, not so easy.

Paul

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Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Fri Oct 12 00:28:00 2001