Excuse me!
Which temperature will be used in stress analysis,flexible temperature or operation temperature?Here Code B31.3 does not show it,it just request that the most severe condition must be considered.The flexible tmperature sometimes much higher than the operation temperature,If we use the flexible temperature to analyse,there must be some conditon distortion.So we can not choose spring and design piping supports according
to the flexible temperature.In my opinion,we shall analyse piping stess using the operation temperature,and the flexible tmeperature just for checking stress.
Any suggestion?