Applies To
Product(s):	AutoPIPE
Version(s):	ALL;
Area:	Code Stress
Date Logged & Current Version	Dec 2019 12.02.00.14

Problem:

When plugging in the outputted values for in and out of plane bending moments, stress intensification factors, according to ASME B31.4-2016 (and also verifying with
the ASME B31.4-2016 AutoPIPE Help), the bending stresses (ex. 28,455 psi) did not match the output reported value (ex. 25,193 psi).

Note, pipe is 10.75" OD with a 0.365" WT (0.046 mill tolerance).

Why are the values different?

Solution:

The difference was due to using the mill tolerance value. Per the settings of the model, mill tolerance was not taken into account for the analysis, However the hand calculations did account for the mill tolerance (ex. 0.365" - 0.046"). After removing mill tolerance from the hand calculations, both results matched within reason.

19. Bending Stress reported by AutoPIPE is different from hand calculated values, why?

Problem:

Solution:

See Also