We designed Riser pipe nozzle as per API 650 Table 5.7a
Unfortunatly, there is some external load occured.
So, we need to perform additional analysis for external load.
However, TANK didn't consider Table 5.7a. So, I trying to FEA using NozzlePRO.

But, NozzlePRO cannot perform analysis for sauare nozzle pad and uneven square pad.

Is there any other good experience or method to analyze this?