There is a vertical vessel supported by a skirt, it shall be hydrotested in a horizontal position.
In a horizontal position it is installed on two saddle supports (one under a shell the other - under a skirt). It is required to check strength related to support load action under horizontal hydrotests.
In order to make this calculation we put the model in the file into horizontal position and add saddle supports. But a problem appears: analysis results shows overstress in a skirt support because test pressure and liquid were taken into account. How to avoid inclusion of pressure and liquid in a skirt?