Hi I am doing the stress analysis of pump suction lines in a tank farm area. The tank farm area is a network of 13 tanks(80 metre dia) and 2 pumps. The suction line is 42" to 48" ( 15.88 mm wall thickness)header size and tank nozzles are of 30" size.
Apart from within the tank bund area, the entire pipe work is buried and the anaysis done at a design temperature of 59 deg. C.
I have done the analysis using the buried modeller and stresswise and tank nozzle loadwise the system is safe( Expansion joints are planned at tank nozzles). I have added some axial stoppers in the header portion of the piping to limit the pipe movement at direction changes. These stoppers are added at valve pits, where the system is not buried. I am putting this question because I am getting a very high value of axial load at the stopper ( to the order of 315 tonnes ). I wonder whether it is a realistic value. Any suggestions...will be appreciated.

Your restraint load is higher , if your stiffnes
from the restraint is high.
Look for a realistic stiffness to the restraint,
or include the restraint construction in your pipemodel.