Base Ring - General Information

Owned by Former user (Deleted)
Dec 11, 2015
2 min read

Description: The label given for the component. It will appear in the component pane, the report dialog, the summary pane, and at the top of the component report. This will default to the component type and component number. For example, the third nozzle for the vessel will start with a description of Nozzle 3.

Mark: A shorthand reference for the component. It will also appear in the component report. The default entry will be an abbreviation of the component type and the component number. For example, the second jacket shell for the vessel will start with a mark SJ2.

Calculate Skirt Stress: Select this box to add a special skirt check to the base ring report; this will examine the skirt for adequacy under the load carried into the skirt from the external bolting chair or top ring designs. The calculation is considered very conservative in many cases since it does not adjust for the gusset spacing. In general, it is recommended to use this setting when the distance between the gussets is at least two times the distance between the outside of the skirt and the bolt circle.

Configuration

Select from the following configuration options:

Base Ring only: The skirt is welded to the base ring. Gussets, compression chairs, and top rings are not part of the design.

Base Ring with gussets only: The skirt is welded to the base ring with gussets attached to the base ring and the skirt. Compression chairs and top rings are not part of the design.

Base Ring with centered anchor bolt: The skirt is welded to the base ring and a half obround shaped gusset is inserted into the skirt wall and attached to it. The anchor bolt circle is then equal to the diameter at the mean thickness of the skirt. The designer is responsible for considering the lost area of the skirt due to the insertion of the gusset as the calculations do not check for it. Compression chairs and top rings are not part of the design.

Base Ring with gussets and complete top ring: The skirt is abutting the base ring and is attached to it. The top ring inside diameter is attached to the skirt outside diameter; the two values must be equal. The gussets are placed evenly around the entire skirt and are attached to both the top and bottom ring and the skirt.

Base Ring with gussets and compression plate (chairs): The skirt is abutting the base ring and is attached to it. The compression plates are spread evenly around the entire vessel and do not form a continuous ring; they are attached to the skirt and to a gusset pair. A pair of gussets is placed symmetrically around each anchor bolt and attached to the skirt, the base ring, and the compression plate.