Piping Input menu: Environment > B31.8 Buckling Calculator 
Input Tools toolbar: B31.8 Buckling Calculator
Displays the B31.8 Buckling Calculator dialog box. You can calculate the strain value to determine buckling and lateral instability values for a pipe element according to B31.8-2018 paragraph 833.10, Bucking and Lateral Instability.
From and To nodes for the element display in the window title.
Input
The following properties are read-only. The software uses values defined in the model.
You must type values for the following properties:
-
Max Internal Design Pressure (Pi)
-
Min External Hydrostatic Pressure (Po)
Results
Critical Buckling Strain (Epsilon_cf)
Defines ecfcrit, the maximum longitudinal compressive strain allowed to prevent local buckling due to force-controlled loading.
Error Message
Describes errors in the calculations.
Calculate
Calculates strain and stress results based on the defined properties.
Save & Exit
Saves all property values and results, and then closes the calculator.
Exit
Closes the calculator without saving defined properties or results.