I have two problems regarding the vaporization in the pipeline 1) In the textbook, it is common to find examples with a steady flow and pressure. If regional pressure is lower than the fluid vapor pressure, vaporization will occur, am I correct? If suction pressure is 20kPa, sum of loss (elevation, friction, and minor losses) is 18kPa, and the fluid vapor pressure is 2.3kPa, vaporiation will happen, isn't it? 2) How can I evaluate the same problem if the pump type is changed to pistion pump? Unsteady suction pressure is induced periodically inside the pipeline, can I carry out the calculation by assuming the averaged suction pressure? If the estimated peak suction pressure is 30kPa, under what suction pressure value will vaporization happens?