we use grafite with monel embeded gaskets for caustic 30% conc. at 140
C temperature lines, but frequently it leaks after few months in
service (max. 6months), after opening the flange joints we found the
gaskets were totally failed. The line material is Ni-200 with stub
ends and lap joint flanges.
Kindly suggest the appropriate gaskets to avoid frequent leakages from
flange joints.
(photos could not be attached due to lager sides)
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