Step 1.

Insert Vessel / Tank

Step 2.

Insert internal piping with rigid options
to surface of Vessel's / Tank's end Cap.
Insert User SIF =1.0 at junction to override
all other SIF calculations

Optional: Take credit for flexibility in end cap

Connect internal piping to inner surface of
end Cap, then insert nozzle element to
outside surface of end cap. 
 

Step 3.

Insert piping connected to nozzles

Also recommend to insert a User SIF at the
surface of the nozzle connection to the end cap.
What value should be used, may need to hand
calculate this value or use another software to 
provide that information, this would not be a
typical code calculated SIF value. 

Optional: Report Allowable forces and Moments

Insert reference points at nozzle connection
to end cap to report loads that exceed
allowable forces and moments. 

Step 4.

Insert End cap to account for weight