Thanks Michael. Your approach make sense to me. Maybe if I experience a high temperature system with large slug/plug flow, I may use this snubber in case there is a constraint in re-routing the line. Also, If I remember right my senior stress engineer before have a rule of thumb regarding the percent liquid present in the mixture to consider as vibrating line where the 4 Hz can be used to check if the system has enough restraints as a countermeasure. But of course, it's hard to predict the actual frequency of the two phase system in design stage. Maybe this 4 Hz value was established through years of experience in the industry where most of the vibration frequency occurs. In my case I have experienced the 3 Hz frequency of vibration of two phase system.


Warm Regards,