Hello,

I am using API 5L Grade B pipe in my analysis. The error checker gives me a warning which reads:

"Warning - Message Number 252E - On element 10 TO 20 yield stress is not specified. It is set to 0.0"

The analysis results however seem to be ok. Why is this material showing this warning? How does a 0.0 yield stress affect the results?

Since the analysis is computed using the B31.3 code equations, isn't the yield stress not necessary if all of the other pipe properties are available (which they are for this material)?

Thank you,
Dmitriy