X60 is High Tensile CARBON STEEL pipe. You would be out of your mind to use Carbon Steel Pipe at -100F without taking notch toughness issues into account.


Before you make a huge ASSumption you should study up on the basics... "As codes are not restricting the use of the material at the lower temperature range, I think CAESAR II database shall be updated.

Currently I am assuming the expansion coefficient from 32 deg F to -100 deg F as same value as 70 deg F. It would be more conservative"