Re: Regarding stress check for hydro test

B31.3 doesn't require explicitly any stress check during hydro test. However B31.1 asks for longitudinal stress during hydro test to be limited to 0.9Sy. Earlier version of Caesar did make stress check for hydro test for 1.33 times Sh in line with ocassional load limit as there is no specific allowable for hydrotest as mentioned in B31.1. However Caesar II Version 5.0 has removed that check to make it more compatible to code requirement. So it's now requirement of user whether to go for stress check during hydro test like in B31.1 accordingly it shall be mentioned in the project specification.

Thanks
Ratul
--- "Kulkarni, Shailendra" <kulkarnis2@bv.com> wrote:

>
> Dear all ,
>
> my query about the above mentioned subject is
> that-
>
> 1) why Caeser version 5 don't give any result for
> hydro test stress
> check?
>
> 2) Because it is a load case that pipe under goes
> at the time of
> commissioning, during this test, site able to verify
> the integrity of
> pipe, detect any leakages and weld/flange connection
> problems. Since
> this is done only once or twice in the life of the
> plant, whether B31.1
> allows us to raise the allowable for 1.0sh for
> sustained case to 0.9sy
> for hydro test load case.?
>
> Thanks in advance
>
>
> Shailendra kulkarni
>
> Pipng Stress Engineer
>
> Black and Veatch , Pune - India
>
>
>
> [Non-text portions of this message have been
> removed]
>
>

       Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/ Received on Fri Feb 15 02:47:00 2008