Re: [MW:30319] PSV set pressure during hydrotest of piping

Dear Manoj,

Please check through API RP 520 and you should find the set pressure requirement for PRVs. Typically it is set based on the MAWP or  design pressure. However you also need to consider the static head between the protected equipment and the relied valve while deriving the set pressure.

Hope this helps.

Thanks and Regards

Vino

On Tue, Dec 24, 2019, 08:23 Manoj John <manojacgnr@gmail.com> wrote:

Dear Experts,

As per B31.3 what is the PSV set pressure during hydrotest.

Please give expert opinion as there is no clause found in B31.3 for hydrotest PSV set pressure, PSV set pressure for pneumatic only prescribed.

Thanks in advance,

Manoj

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