Thanks Anindya for your response.
I was trying the idea in caesar
“Connecting nodes does not necessarily mean that two nodes are at same pt. in space.”

When ever I am trying to connect two node with connecting node where there are global difference of co ordinate , caesar by default pulling both the node point in same location over-riding there previous two different global co ordinate.
In a big model also when ever I am trying to connect a node point with other node point which are within the model but in different location then caesar break the model & can not run, it is showing dimensional error.
That means what I feel caesar model understand connecting node in same global co ordinate only.
Please correct me if I miss something in my understanding.
In case of finite element analysis I do not any idea about connecting node behavior but I feel it will be very difficult for piping model to behave properly when we try to relate two different location node point .
Thanks Anindya once again for your good suggestion on different topic in this forum & personal help.