Q & A > Question Details
What is the main difference between Accumulation and Over pressure for a relief valve? could anyone explain their importance while sizing a relief valve.
20/07/2012 A: Lionel SHEIKBOUDHOU, Sara, lionel.sheikboudhou@gmail.com
Overpressure is relative to set pressure while accumulation is relative to MAWP (or design pressure).
So, Relieving pressure = set pressure + overpressure = MAWP (or design pressure) + accumulation.
The relieving pressure appears in the sizing equations so you need to calculate it.