Hi,
Nozzle loads can be calculated in CAESAR using API650 input for large diameter tank. It is noticed that the nozzle loads are much higher if displacement vector D1 is specified in API650 input for radial deflection and nozzle rotation. The load case for this would be W+T1+P1+D1.
If vector D1 is left out in API650 nozzle flexibility calculation then the nozzle loads calculated by CAESAR in load case W+T1+P1 would be much lower than W+T1+P1+D1.

Please advise which load case is to be used for nozzle load input to API650 APPENDIX P for checking tank nozzle loads compliance?

Your help and advice would be much appreciated.

Thanks