Thursday, August 20, 2009

[MW:2977] bolt tightening

Dear all friends
if  flanges used for joining, that this joint will be used in hot service(hot media folw in pipe).due to gradiant temperature between inner surface of flange & bolt,it is likely that bolts yeilded and leakage is occured.
how can prevent it?
for hot & cold service, what variables must be considered for tightening( tensioning or torqueing) ?
regards.


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