I wonder how many will take a look into the B31.3 to check this issue. Maybe is not a bad idea to update the database. I have now some lines that will be subject to some modifications, several times analyzed in the past and in all calculations the allowable was the higher value. I had some doubts an I checked also in B31.3 and surprise.
I will check also the piping spec thicknesses, who knows.

Regards,