The Allowable Stress value for Thickness Measurement Locations (TMLs) will, in most cases, be populated after you enter data into certain required fields. There may be instances when you want to provide a user-defined value for Allowable Stress. The following sections contain instructions for executing both procedures.
It is important to familiarize yourself with the Allowable Stress reference tables and the method of interpolation used by Thickness Monitoring.
Access the TML for which you want to define Allowable Stress.
Below the workspace heading, select the TML Details tab.
The TML Details section appears, displaying the General Information subsection of the TML datasheet.
Depending on the type of equipment the TML represents, enter data into the required fields.
In the case of Piping and Pressure Vessels, enter data into:
In the case of Tanks, enter data into:
When you finish entering data into the fields, the Allowable Stress field will be populated with a value determined by the relevant Allowable Stress reference table.
In the upper-right corner of the section, select .
The changes are saved.
Note: This procedure can be performed before or after you have automatically calculated Allowable Stress for a TML.
Access the TML for which you want to define Allowable Stress.
Below the workspace heading, select the TML Details tab.
The TML Details section appears, displaying the General Information subsection of the TML datasheet.
Select the Design General tab.
The Design General pane appears.
Select the Override Allowable Stress check box.
The Allowable Stress box is enabled.
Enter a value into the Allowable Stress box.
Note: If you are providing a user-defined Allowable Stress value, no values are needed in the fields that are normally required to calculate Allowable Stress.
In the upper-right corner of the section, select .
The changes are saved.
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