Primary Stress Index B_2* for the Evaluation of postulated or detected Circumferential Flaws at the Connection Straight-Pipe / Bend

摘要

For detected or postulated circumferential flaws at the weld connecting a straight-pipe and a bend the first step of the common evaluation procedures is the determination of the stress distribution. Therefore the common piping calculation programs can be used. In these programs for calculating the primary and secondary stresses and for checking if the primary and secondary stress limits are satisfied the following well-known equations (1) and (2) are implemented.