Sir what ever you said is Right.

In this case there are two Wind Loads.
One is in X- Direction (Case-W1) and second is in Z-Direction (Case-W2).
Speed of wind is 180 km/hr.

Equation P x L = M. I reduce the Length it further help me in Thermal Case not in Wind case.
If I am trying to reduce force and moment in Wind Case. Then Thermal Force and moment get increased. The response of Case-W1 is entirely different from Thermal response.
Adding support cannot solve my problem. The way which I had found is to restrict pipe in X & Z Direction (means Stiffen the pipe). Then flexibility of the pipe will come down and causing High Thermal force and moment.

Regards
Daman