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The following is displayed when performing a model consistency check in AutoPIPE
W2164-94: The validity of SIF data is only demonstrated for a Do/tn ratio less than or equal to 100. The Do/tn ratio is greater than 100 for the following pipe ID's
Why and How to avoid it?
For some codes (ex. B31.1 (2014 and later)), the SIF calculations have only been validated for a certain range of pipe sizes. For any pipe size out side of the range, the SIF calculations may not be valid. Let us consider an example, using ASME B31.3 2016, see Flexibility and Stress Intensification on table D300 and refer to General Note:
As the warning message above mentions, the indicated Pipe IDs have a ratio that exceeds that mentioned by the code. The program will always print this warning message so long as a pipe property used in the model exceeds code allowable. As the stress engineer, you will need to make a choice on how to handle this warning:
a. Ignore the warning
b. Add a user SIF at specific node point location(s) (note, again even with entering a different User SIF, the warning will sill be displayed)