RE: Flange Leakage

From: <Ben>
Date: Wed May 15 2002 - 22:17:00 EDT

At 740C/1364F, the gasket's coating has probably burned away, leaving just the thin corrugated (grooved) sheet of metal. Smooth face finish also can be cause of gasket not retaining good contact.

Spiral wound would not be suitable due to exceeding available filler material temperature limit, and might not be acceptable with flange design.

Taper-Lok has a sure-fire design for revising most any flange face to accept a tapered solid metal gasket. However, field revision might be a problem.

Ben

-----Original Message-----
From: RaviRaj_Rastogi@ril.com [mailto:RaviRaj_Rastogi@ril.com] Sent: Wednesday, May 15, 2002 9:46 AM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Flange Leakage

For Flue Gas Expander ( FCCU ) which operates at a high temperature of 740

       Deg C , line size 72" and pressure of 3.5 bar, we are facing problem
       of Flange leakage.

The Leakage is not continuous but is intermittent during continuous
       operations. We have gone ahead with changing the gaskets to
       Camprofile (Flanges are Weld

Neck RF, smth finish 300 # rating, SS grade 321), tightening of bolts,
       analysis results of flange leakage check etc (found ok)., but problem
       still persists. Request the

forum to pour in with valuable suggestions for mitigating the problem and
       finding the root cause.

Thanks.

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Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Received on Wed May 15 22:17:00 2002