A case study on failure of superheater tubes in an industrial power plant |
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| Affiliation: | 1. School of Materials Science and Engineering, Shandong University of Science & Technology, Qingdao 266510, China;2. School of Mechatronic and Automobile Engineering, Yantai University, Yantai 264005, China;3. Yantai Eddie Hydraulic Technology Co., Ltd, Yantai 265503, China;1. Ternopil Ivan Pul''uj National Technical University, Ruska 56, Ternopil, 46001, Ukraine;2. Institut Pascal, UMR 6602/UBP/CNRS/IFMA, Clermont Université, BP 265, 63175 Aubière Cedex, France |
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| Abstract: | A failure analysis investigation was carried out on the secondary Superheater tubes of a boiler unit in a steam power plant. The tubes, made of DIN-16CrMo4 steel, failed by bulging and rupture only after about three years of operation. Metallurgical investigations revealed that microstructural degradation had mainly occurred at the external (fireside) tube surface. Long-term overheating was identified as the root cause of the premature failure. |
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