RE: PIping Trivia

From: <Ben>
Date: Fri Oct 12 2001 - 18:49:00 EDT

I meant the exposed portion to be that protruding outside the joint and that it is exposed to outside environment.

We might suggest for API 590 or commercial firms to provide following changes in standards?:

(1) include lifting lugs on items over 50 lb

(2) limit size range of Fig-8s to 10 NPS

(3) blinds, spacers, and Fig-8s to have indicators showing material, flange class or pressure rating, ID for item type (i.e., blind, spacer, Fig-8), standard, and manufacturer name.

(4) spacer or orifice plate would have a hole drilled in an outwardly exposed part of the handle to indicate the item has an orifice.

Ben

-----Original Message-----
From: SARE, RALPH H. [mailto:SARERH@YANPET.SABIC.com] Sent: Friday, October 12, 2001 6:50 AM
To: 'PipingDesign@yahoogroups.com' Subject: RE: [PipingDesign] PIping Trivia

> > What about use of Figure-8 blinds made of carbon steel?
>

The use of listed CS is permitted. Size of course shall meet the API 590 req't. Is the use of A-36 material ( structural grade but commonly available ) allowed under the rules as a material for operating blind? Well ...

> > I would think the exposed portion would rust in most
> > environments, thus destroying the gasket sealing surface.
>

Figure 8 are in-line closure. Its is exposed both to the dowstream and upstream media (not to the atmosphere). The material selected must of course be suitable for the service. Ditto for the gasket.

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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 18:49:00 2001