Yes, CAESAR "can" analyze radial deflection, but you have to do the math manually.
RH = RC(dT•alpha+1)
dR = RH-RC
dL = dR
dL = L•alpha•dT*
RH = Radius while hot
RC = Radius while cold
dT = actual change in temperature
alpha = coefficient of thermal expansion
dR = change in radius
dL = change in length of equivalent straight "pipe"
L = length of straight "pipe" = RC
dT* = fictitious temperature gradient to achieve equivalent thermal growth
If you are going to go to this effort, however, you should likely also run an FEA to get the rigidity of the pipe. Nozzlepro can analyze rigidity of the connection, provided material, dimensions, pressure, and temperature.
More pressure = less flexible. Use max pressure, or you do so at your own risk.
Hot = more flexible. Use ambient temperature, or you do so at your own risk.
Connect radial "pipe" via CNODEs to the center of actual pipe.