Actually the line is an existing 60" (reducer 66"x 60") pipe that is connected to a centrifugal pump. The main problem that I am facing right now is the type of expansion bellow used in the site because in the datasheet of the designer the 3rd expansion bellow (see the attachment for the illustration) is a hinged type EJ while the existing or as per as-built/site the EJ is only single EJ (without any tie rod /hinge). Upon analyzing it in the CAESAR II, if the 3rd EJ doesn't have tie/hinge there is a big displacement along the line going to the elbow (-Z) that will also result for stress-over.
Additionally, I cross-checked the latest isometric versus the as-built/site condition, there is no anchor near the 3rd EJ (except the pump nozzle).
I just want to clarify for the need of an anchor near the single EJ, Is it really needed? If yes, why the as-built doesn't have anchor and yet the line is still operating?
FYI: Temperature : (Ope) 50C & (Design) 90C
Pressure : (Ope) 6.5 bar & (Design) 10bar
Line size: 60" (reducer 66"x 60")
Maximum Displacement in the 3rd EJ = approx. 2300 mm (if no tie/hinge)
Maximum Displacement in the elbow = approx. 150 mm (if no tie/hinge)
The displacement above is very large.
Thank you in advance.
Regards,
marchie