Our system pressure is 450bar which is above the limit of ANSI 2500# flange rating (430bar for A182 F51). Therefore, we are going to use piping specification prepared as per Stoomwezen (germen code) which is suitable up to 550 bar by using API 6BX flange.

In this case, can I analyse piping system as per Stoomwezen code in Caesar II, or conduct stress as per B31.3 but check flange loading as per API 6B?

Thanks in advance

STC