Nozzle loads for Leg/Skirt calculations in PV-Elite and Reinforcement pad 1

Two thoughts:

1. Is the upper cylinder actually a part of the lower cylinder in your program? If they are simply two independent meshes that physically overlap, then the program won't recognize force transfer between the two (probably, I know nothing about that software).

2. Could you apply a similar, but greater, force lower down on the main body of the vessel? Reducing the length of the moment arm but increasing the applied force to keep the rotational force the same? It won't help for repad calcs for the top section, but it should at least get your moment calculation for the legs.

1. I believe there is an option "consider nozzle loads on supports" in the Tools\Configuration\Job Specific Settings, you can read their help here.

2. No, I believe you added a cylinder instead of a nozzle to the head. I would suggest you remove that cylinder and add a nozzle with a pad.

"Is it possible to add a reinforcement pad on the Ellipse head as shown in the figure?"

Yes it is possible. However it is rarely done because the pad shall match the compound curvature of the head. Difficult to form. A better approach is a forged nozzle.

Regards

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

Have you tried to use this switch in the settings?

I have seen the problem with skirt and hold bolt design missing the loads from attached piping. Modifications had to be made after the vessel was installed.

We model the full vessel in the piping model and provide the vessel designer with the skirt loads, which include the attached piping and the mass/EQ/wind loads of the vessel.