Krish's responce has me thinking,


The actual (residual)pressure thrust is usually generated by the areas of the convolutions.

Modern bellows design gives small convolutions and hence small total pressure thrusts.

The pressure thrust generated by the process (50KN) will probably be acting on the back of the equipment and the back of the first bend.

any residual pressure thrust will be generated by the convolutions and will likely be very small.

Remember that the nozzle is designed to take pressure thrust anway (imagine a blank flange on the nozzle)

For your job, i would suggest a data sheet to the preffered supplier will yield a good response.