I was working with In-line pressure balance expansion bellow. While modelling this bellow I had taken 3 parts of bellow with node no. say 50,60,70,80 and connect 50 to 70 And 60 to 80 with tie rod. ( As tied expansion bellow is modelled in caesar II ). Still pressure thrust was there. So I had entered pressure zero considering the fact that pressure balance will take care of pressure thrust. What is the correct procedure to model in line pressure balance expansion bellow.

Regards

Habib