Could the staff at COADE list out the Load Cases wherein Corroded thickness is used for analysis by the software for B 31.3, B 31.4 & B 31.8 as default.

Is it as per their respective codes?

I believe that by default the software considers uncorroded thickness for sustained and Occasional cases as the load case will be conservative due to weight etc.

Also by default corroded thickness is considered by the software for expansion load case only as this is conservative.

Do confirm on the above.

Another query is whether +12.5% mill tolerence is actually used in CAESAR-II stress analysis Calculations (Operating, Sustained, Expansion and Occasional checks)?