F101 APPLICATION OF POTENTIAL DROP TECHNIQUE TO THE INSPECTION OF WELDED BOILER PRESSURE PAPTS

概要

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Electrical potential drop procedure for crack size determination is generally applicable to conducting materials in wide range of environments including the high temperature condition. In this paper, a practical method using the electrical potential drop technique was discussed to evaluate the creep damage accumulated in the welded power piping such as main steam pipe and hot reheat pipe. This paper described the outline of fundamental application studies including round robin tests conducted in the academic activities in the Japanese Society for Non-destructive Inspection. The authors have proposed a technical standard as practical requirements on the potential drop technique for the application to the inspection of welded power piping. And the practical measurement in the burst test using the repair-welded piping has been planned to verify the applicability of the electrical potential drop technique.
一般社団法人日本機械学会の論文