Re: Flange Leak Analysis

From: <Erik>
Date: Tue Aug 05 2003 - 15:05:00 EDT

How do you calculate the equivalent pressure at a flange joint. We had a leak at a flange joint of a gaspipe (blast furnace gas). The diameter of the pipe was ND 500, the internal pressure 60 mbarg and the bending moment 90000 Nm.

-------Original Message-------

From: <a href="/group/PipingDesign/post?postID=-920p-AmM27s6SIxWviS_khuUCSWYa2N6bGjCZjJprCq-UKSpo7-WjPZh4jlxG6SJh4fAAwZfFK8gjId5JtEMPoaPKg">PipingDesign@yahoogroups.com</a> Date: dinsdag 05 augustus 2003 14:07:59
To: piping design
Subject: Re:[PipingDesign] Flange Leak Analysis

This depends on project specifications. Generally Flange leakage calculations should be made for following conditions

1. For all High pressure joints say 900# and above rating
2. Whenever total equivalent pressure at flange joints due to combined effect of imposed forces and bending moments and internal pressure exceeds the pressure as per pressure-temperature rating of flange
3. Some critical flanges like PSV flanges where high momentary loads may occur.

Yes, you can rely the results of CAESAR II. It performs calculations as per ASME guidelines only.

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"NO EFFORT IN LIFE GOES UNPAID, HENCE GO AHEAD"

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Tushar K. Rajyaguru
Plant & Piping Engineering,

Larsen & Toubro - Chiyoda Ltd.,
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Dear Friends,

I seek your expert advice regarding the flange leak analysis for hot/cold lines.

Have anybody come across some criteria/factors/situation which will decide

what flange joints need to be checked for Flange leak analysis??

Which is the best program to do this? Can we rely on Caesar-II?? Are there

any ANSI prog. for this purpose? What are the sources to get these prog.?

Best Regards.

Tushar Zope

Extn: 162

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[Non-text portions of this message have been removed] Received on Tue Aug 05 15:05:00 2003