Users need to use Define>Components>Flanges to Import or Add a new flange matching the NPS of the piping. In the example below a 16" NPS Weld Neck flange imported from the Texas Flange library to obtain length and weight of the flange. Material type A105 was changed manually and is optional as the default is custom material type.

Select one or more elbows, then Assign menu>Components>Assign Flanges to Object ends, select Elbows and specify the Flange property for each end of the elbow as show below. Press OK or Apply button to add flanges to elbow ends.

Alternatively, users can click the Draw Flange icon. For the first starting flange, change Flange location to I only since I is the starting joint for the elbow if we follow the direction of the model indicated by the orange flow direction arrow. We also specify the object offset reference to be the End point of the flange since the flange end point is the same as the I joint of the elbow. CSiPlant will automatically add the length of the flange where there was previously piping.

To draw the second flange shown bottom right, change flange location to J only and Object offset reference to Start point. The elbow J end joint is the starting point of the second flange. Following these concepts of flange location and Object offset reference point, users can alternatively add flanges using the Insert command by typing the letter I followed by the letter F. A benefit of using the Insert command is that insertions can be made to multiple selected joints or objects with just one command.

For design, CSiPlant does not automatically recognize flanges on elbows in order to calculate SIFs and flexibility factors. Users must specify elbow design properties for calculation of code flexibility factors and SIFs by selecting one or more elbows, then use Design menu>Assign Design properties, and change Object Type to Elbow as shown below. Here you need to specify whether there is a single flange on either I or J end of the elbow, or flanges on both sides of the elbow as with this example. Also available in this dialogue is the ability to specify an elbow thickness overwrite which also affects calculation of elbow flexibility factors and SIFs.

The orange arrow indicates "flow direction", which is actually the model direction which determines the I and J end joints of each element and component.

In order to modify elbow thickness, select one or more elbows and in a similar manner and go to Design menu>Assign Design properties, change object type to Elbow, and change elbow thickness overwrite and enter Custom elbow thickness.

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