Thursday, October 30, 2008

Relationship Between MOP & MAOP

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.

For Design Pressure & MAWP, read in "Relationship Between Design Pressure & Maximum Allowable Working Pressure (MAWP)".

MOP <= MAOP < Design Pressure <= MAWP

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