| Applies To | |
| Product(s): | AutoPIPE Vessel |
| Version(s): | ALL |
| Area: | General |
| Date Logged & Current Version |
August 2024 45.00.02.004 |
Problem:
Which Local Load Method should I select WRC-107, WRC297, WRC-537?
Solution:
WRC 537 is essentially the same as WRC 107, but provides standardized curve fits and additional extrapolated data.
WRC 297 was created to supplement WRC 107. WRC 297 simply improves on WRC 107 by calculating two normally intersecting cylindrical shells (in other words, cylindrical nozzles radially attached to cylindrical vessels). WRC 297 also provides data for larger vessel diameter-to-vessel thickness ratios and provides better readability on smaller values.
Due to liability lawsuits Bentley can not provide design details such as this. Recommend to review both codes and determine which is more applicable to your project.
Only comment is a quote from WRC-297:
WRC Bulletin 107, "Local Stresses in Spherical and Cylindrical Shells Due to External Loadings," by K. R. Wichman, A. G. Hopper, and J. L. Mershon, has been widely used by design analysts since its initial publication in August 1965. ........ The persistence of this need was a major motivating factor for preparation of this "Supplement" provided here in Bulletin 297 that broadens the coverage of Bulletin 107.
General Practices: (Not Limited to)
WRC 107 / 537 is used for nozzles on the spherical shells and Heads.
WRC 297 is used for nozzles on the cylindrical shell.
Again, It is user responsibility to choose the correct design code.