Hello,
I'm modeling a tower and the pipe system from the top of the tower.
The temperature at the bottom of the tower is 228℃ and the Temp at the top is 167℃.
The tower is 40 meters high.
The diameter of the pipe is 20".
The pipe run down 22 meters then run -z direction 6.5 meters.AT last the pipe run down FTF to a nozzle of a heatexchanger.
while the pipe run down along the tower,there I put 3 restraints,the topest one from the top of the tower is 1.732m ,the second one down 7m,the last one down 7m.At the middle of the horizontal pipe I put a +Y restraint.

My question is:
1,The tower is modeled as a rigid,this means it only expand ,not bend,isn't it right?
2,How can I conpute the average Temp of the tower?
3,The toppest restraint on the vertical pipe in most common case,is a +Y or a anchor?
4,Then the second and the third ,they should be a guide or a hanger?
5,The static output show that the restraint at the horizontal pipe doesn't take effect.Should I put a hanger there?
however ,the sus stress and the exp stress all passed.
6,when I input a hydrotest pressure,what can i get from the output report.
7,The pressur I input is a gauge pressure ,isn't right? So it could be a negative number?

Thanks for all your reply.