Hello Stress Experts,

I am analyzing 20"line connected to Plate type heat exchanger, Expansion bellow is directly connected to PTHE nozzle. If I mentioned Effective ID then loads on the nozzles are 9000Kg. If I ignore Effective ID then loads is very negligible.
In previous project I have ignored Effective ID for rubber bellow.
Can anyone confirm that shall I mention Effective ID for pressure thrust force calculation in stress analysis or I simply ignore.
As per Expansion bellow datasheet single arch type bellow is used.

Your prompt reply is highly appreciated.

Thank you in advance.