Re: Flange Leakage

camprofile is a solid gasket. at the temp specified, chances are its wrapped with graphite which can easily handle the 740C temp.

if the flange rating is correct then the flange/bolt should be no prbblem (assumption here is the desing has been chekced and found correct). what is left is the installation and the method of tightening.
if the sqaureness has been checked, the flange faced inspected and conform with the code reqt and the method of tightening followed the accepted industry practice, then the flange shold hold and not leak.

but its leaking. sure would like to get a picture of the installation and layout before ventruing further with a recommendation.

• In PipingDesign@y..., "Ben Nottingham" <bnottingham@c...> wrote:
  > 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@r... [mailto:RaviRaj_Rastogi@r...]
  > Sent: Wednesday, May 15, 2002 9:46 AM
  > To: PipingDesign@y...
  > 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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