Hail, O mighty guru! A lowly and insignificant worm seeks erudition: I am troubled with gaskets.
We have an installation where a gas compressor cylinder has a flat faced flange, approx. 18 inch bore. Then, we have a pulsation reduction orifice and flat faced inlet flange. This whole business operates at up to 900 Psig, and up to 150 degree F temp. It was assembled with standard fiber type gaskets, no reinforcements or sealing rings. Amazingly, it leaks in spite of torquing to upper limit of the bolting. My take is that we are spreading the clamping force over the whole gasket area, while we are actually only sealing with the area from the bore out to the bolt circle. I am suggesting going to a Flexitallic type gasket, which would put the clamping load within the bolt circle. But, delivery on these is LONG! Alternate is to machine the thickness of the orifices (1/2" thick) outside the bolt circle, to put all the clamping force on the inner area, and go back to gasket material, but possibly with a sealing ring in the ID. At least we could get this done quickly. Any alternate suggestions?
Thanks
George McKinney
Ha Ha Paul. But of course, the question was regarding flanges, not gaskets. Hey, come to the mountain-top and ask me a gasket question, anything. I'll answer as soon as I'm done meditating....ohmmmm.
Shouldn't someone with a screen name of "gasket_guru" know this already?
Just a cheap joke,
Paul
> From: gasket_guru
> When preparing to bolt up a gasket between two flanges, if a
> pipefitter were to say the flanges were "out of parallel", what
> exactly would he mean by this?
>
> Would he mean:
>
> A. Each flange face is flat, but relative to the mating flange, the
> sealing surfaces are not pareallel to EACH OTHER, or
>
> B. The sealing surface of each flange itself is not flat, but "wavy"
> or "warped", or
>
> C. Something comletely different.
>
> Finally...are there any ASME spec's regarding allowances or
> tolerances for A. or B.
>
> Regards,
>
> Davis
Main site: http://www.pipingdesign.com
http://www.pipingdesign.org
http://www.pipingdesign.ca
------------------------------------------------------------------------------
Yahoo! Groups Links
a.. To visit your group on the web, go to:
http://groups.yahoo.com/group/PipingDesign/
b.. To unsubscribe from this group, send an email to:
PipingDesign-unsubscribe@yahoogroups.com
c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Non-text portions of this message have been removed]
Yahoo! Groups Links
a.. To visit your group on the web, go to:
http://groups.yahoo.com/group/PipingDesign/
b.. To unsubscribe from this group, send an email to:
PipingDesign-unsubscribe@yahoogroups.com
c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Non-text portions of this message have been removed] Received on Fri Jan 23 14:13:00 2004
This archive was generated by hypermail 2.1.8 : Mon Oct 27 2008 - 20:24:02 EDT