This paper presents failure investigation on reheater pendent SA213-T22 tubes through visual inspections, steam-side scale and tube wall thickness measurements, metallurgical examinations, and creep analysis. The investigations were carried out following subsequent tube failures of the reheater pendent region of a boiler unit. Interaction event of significant internal scale formation causing the higher metal temperature and external scale exfoliation as a result of high-temperature corrosion is identified to cause the failure of the reheater pendent tube. Prevention actions are recommended to avoid similar failures in the future.
Failure Investigation on Reheater Pendent Tubes Due to External Scale Exfoliation and Internal Scale Formation
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Ahmad, J., Purbolaksono, J., Kadir, A. K., and Rahman, M. M. (October 31, 2011). "Failure Investigation on Reheater Pendent Tubes Due to External Scale Exfoliation and Internal Scale Formation." ASME. J. Pressure Vessel Technol. December 2011; 133(6): 061402. https://doi.org/10.1115/1.4004561
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