A Warning message in AFT Impulse. (PFA Module Only)

Full message is:

The maximum peak-to-peak pressure limit has been exceeded at X location(s).

The maximum peak-to-peak pressure occurred at Pipe Y – Station Z (dP=A, maximum dP=B)

In the PFA module, resonant frequencies are calculated for the modeled system. If these frequencies are caused by a positive displacement pump, the PFA module will automatically generate scenarios that evaluate problematic pump speeds. As part of the calculations when modeling these pump speeds, the PFA module will compare the peak-to-peak pressures generated with that pump speed, and it will produce a warning if these pressures violate the standards described in American Petroleum Institute 2010 Anex C sections A.1 and A.2, pages 67-68.

Note that the peak-to-peak pressure is defined as the difference between the maximum and minimum pressures