API-650 offers two ways to check if a given nozzle is overloaded: Section P.2 and P.3.

CAESAR II does not provide a method to check against either of these Code Sections. TANK however does perform the check outlined in Section P.2. You need to specify the nozzle loads (that you would have from a piping analysis), then you need to go into the "Graphics Output" section of the program. It is here that TANK will plot the interaction diagrams for you. (Note, you must plot the diagrams. API-650 does not give you an "allowable nozzle load", but rather these interaction diagrams.

tk does not yet implement Section P.3, there are still a few issues with this that the Code Committee is working out.