Thanks so much for your reply!
Please see a few clarifications:
1)The set pressure of the new PSV (P size) will indeed be 105% of the set pressure of the existing PSV (L size). I meant that the relieving pressure (Set pressure + Overpressure) of both valves to be equal. Considering 100 psig Set...
Hello,
The staggered set-points of two (2) PSVs protecting the same vessel would mean one PSV is set at 100% of the Maximum Allowable Working Pressure (MAWP) while the second PSV is set at 105% of the MAWP. Consider the MAWP is 100psig for simplicity.
The allowable accumulated pressure for a...