Nozzles in the knuckle region of a torispherical head: limit load interaction under combined pressure and piping loads

Limit loads are assessed for a piping nozzle in a Klopperboden torispherica l drumhead. The particular concern is when the nozzle is located in the knu ckle region of the head. Individual limit loads for internal pressure and t he four nozzle loads are presented. Limit load interaction plots for pressu re versus nozzle axial force, in-plane moment, out-of-plane moment and tors ion, and for in-plane moment versus out-of-plane moment are also presented. The results are discussed in the light of design code rules for load inter action. (C) 2001 Elsevier Science Ltd. All rights reserved.