WRC
WRC 537
Precision Equations and Enhanced Diagrams for Local Stresses in Cylindrical Shells Due to External Loadings
How to calculate local stresses in a vessel or pipe shell where a nozzle or an attachment applies load. It supersedes the long-used WRC 107 and 297 bulletins, and it is what stands behind the question of whether a trunnion, a lug or a nozzle load is acceptable on the shell it is welded to.
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