Awei,

1.Check the options of: stress, stresses extended, stress summary, code compliance, code compliance extended, on the element. In that reports, after the load cases, u can find the piping code with year.

2.In the input echo, For every element it shows pipe dimensions, any restraints, rigid weights etc., if any, and at the end it shows allowable stresses in that also u can find the code with year.