Sir, I already done WNC-Case with anchor free at the Nozzle and checked for sustained displacement at free end. In which I am getting some displacement which is acceptable by vendor because after the Control Valve, pipe is inside the Turbine Casing so there is no provision to provide support.

Checking this with spring in locked condition that I understand. But in Unlocked condition???

Finally, I had changed the pipe routing after consulting with vendor. Through which I reduced Wind forces and moments to some extent. But problem is still there.