[MW:2991] Re: bolt tightening

Hi Ali Asghari,

                      Please check from the above attached book, as per your specification requirement.

Regards,

Y.C.Shiva,

QA/QC Mech Engg,

Doha Qatar,

+974 6166465.

                       

On Thu, Aug 20, 2009 at 1:00 PM, Ali Asghari <asghariali@rocketmail.com> wrote:

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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