What is the Difference between MOP & MAOP in process?
Maximum Operating Pressure (MOP)
A maximum pressure at any expected normal operating scenario.
Maximum Allowable Operating Pressure (MAOP)
A maximum pressure that allowable by any equipment and device to operate satisfactory without affecting it performance.
Example, a conventional direct spring loaded pressure relief valve allow MOP is 90% of set pressure whilst a pilot operated pressure relief valve may allow upto 97-98% of set pressure.
MOP <= MAOP < Design Pressure <= MAWP
MAWP - Maximum Allowable Working Pressure