hello, in a gas project,we are dealing with large bore pipes.in many cases the ratio of D/t is greater than 100.so the B31.3 SIFs are not valid. first I want to know if CAESAR II is a suitable software to dealing with this large bore lines such as 84",72" or we have to use other FEA software? then, if we can use CAESAR,what kind of correction factors should we consider?i mean what is the best way to calculate the correct SIFs?is there any software for this issue or not?

Thank you in advanc