| Applies To | |||
| Product(s): | AutoPIPE, | ||
| Version(s): | ALL | ||
| Area: | Warning message | ||
| Original Author: | Bentley Technical Support Group |
Problem:
The following is displayed when performing a model consistency check report:
* * * W A R N I N G - MODEL * * *
W2143-121 Sc > 20 ksi (138 MPa). In calculation Sc will be set to
20 ksi (138 MPa) for expansion allow for pipe(s)
Why is that and how to Avoid it?
Solution:
As stated in the warning message a value of Sc in the one of the Pipe Properties is >20 ksi (138 MPa). So long as the value is larger than that mentioned the warning will be displayed.
In general, this has to do with a clause in the code that limits Sc to 20 ksi if Su > 70 ksi (480- MPa) .
Note: if using ASME B31.3 Piping code, see the code definitions of Sc for more details on why this warning is applied in AutoPIPE.
Avoidance :
Option #1 - Accept the warning and let the application automatically change Sc as mentioned to correctly calculate the allowable.
OR
Option #2 - Physically change the value(s) of the all the affected Pipe Property so that Sc < 20 ksi (138 MPa). then the warning message will disappear.
OR
Option#3: - Manually set the allowable for the specific code combination on the Load Combination dialog:
1- Uncheck Auto Update
2- Manually change from "Automatic" to (enter a valid value).
Option #4 - Set Ultimate strength less than 70,000, and the program will start using higher Sc, Sh values. This should work for B31.1 2007 and later piping codes.