After changing the piping code edition from ASME B31.1 2010 to 2012 in AutoPIPE, the results are different, why?
1. B31.1 2010 library has different modulus values as compared to B31.1 2012 library, for example compare the pipe material library data from both library files ( B311-10 & B311-12) for CS.
This will account for some of the differences observed by the user.
2. Review the Temp / Press/ PipeID tab to be sure that the expansion and modulus values in the model are correct.
3. The ASME B31.1 -2012 code has different material values than listed in the 2010 edition. These changes would effect multiple pipe properties, ex. long, hoop and shear modulus, in the program.
4. In some rare cases (where no consistent steps have been documented in order to repeat), the model data was found to be different when compared to the program's library files. This would cause a significant change in the code compliance calculations. One way to be sure the model has the correct library values is to essentially reset the Library data by using the following procedure:
Under Tool> model Options> General> change the ambient temp from the original setting to a different one, press OK button a few times, and then go back to the same location to change it back to the original value.
This action will cause the program to reload all the material library data used in the model or refresh the data.
Warning: after resetting the library data as described above be sure to validate the Tools> Model Options> Edit and Results settings are correct.
ASME B31.1 Piping Code