Hi priyan
consider simple rest+guide support.
For large diameter pipe you can model zero rigid from centre of pipe to periphery of pipe then put (rest +guide)at that point for very critical system. It will change moment of nearby nozzle ( accuracy is high).

Do not try to model detailing of pipe support in caesar. Caesar don't do local analysis it do only overall system analysis.

You take load from caesar then compare it with support standard acceptable load or do a finite element analysis in case load at that point is unacceptably high.