Abstract
For components of piping systems it may be necessary in many cases to evalute the crack opening and leakage area of anticipated through cracks in order to estimate maximum or minimum leak rates for the transported gaseous or liquid medium. In this paper several analytical solutions for the crack opening and for the leakage area found in literature are described and comparisons are made between results gained with these methods and values from elastic-plastic finite element calculations. The piping components under consideration are straight pipes with longitudinal and circumferential cracks and pipe bends with longitudinal cracks. The loading cases studied are either internal pressure or bending moment or a combination of both. Crack opening and leak rate values obtained for straight pipes are compared to results of experiments carried out in the frame of the German HDR (overheated steam reactor) - Safety Program.
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