RE: PIping Trivia

From: <Liu>
Date: Mon Oct 15 2001 - 10:09:00 EDT

I agree with you but can you tell me what is 'come-alongs"?

-----Original Message-----
From: SARE, RALPH H. [mailto:SARERH@YANPET.SABIC.com] Sent: Saturday, October 13, 2001 11:31 PM To: 'PipingDesign@yahoogroups.com' Subject: RE: [PipingDesign] PIping Trivia

> .One thing I am curious about. How do you set the things up so
> > you have enough clearance to operate the things and not wipe off the
> > gaskets doing so but not so much that you end up having to jack the pipe
> > ends back together? Or do you have to jack the ends back together?
> >
>

The jackscrew. If its not installed then we normally use the flange spreader . If the flange spreader is not available - there's always the good old reliable come-alongs . The real killer is when you have to install or roll a large diameter (api 605?) blanks between two very stiff (immovable) equipment ( like a column and vertical reboiler separated only by a short spool . In this case dont use the "regular" blanks, fab new blank using the B31.3 to figure out the min. thickness or drop the spool and use an end blinds.

For "thin blanks" its no sweat since the other factor that make up the gap between flanges will jsut be the thickness of the gasket ( about 3 mm, 2 each) - insignifcant.

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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 Mon Oct 15 10:09:00 2001