Dear Moorthy,
Please realize that 'YOU' are designing the turbine exhaust piping system. Will EXJ vendor or your client, turbine supplier- tell what is right ? If it fails, who will be responsible ?
I do not understand why more than one flange weight directly connected with turbine flange will go towards flange nozzle, if you support the EXJ from the bottom ?
If your expansion joint really transmits so high load on turbine exhaust flange, will not the same load pass through the bellow material, too ? Is it designed for that ? Be careful.
http://www.flexicanbellows.com/images/Inline%20Pressure%20Balance%20Bellows.pdfIn case of engineered solutions like in-line-pressure balanced bellow, your conceptual design has to be right.
regards,
sam