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.
|Journal||Journal of Pressure Vessel Technology, Transactions of the ASME|
|Publication status||Published - 10 Nov 2011|
All Science Journal Classification (ASJC) codes
- Safety, Risk, Reliability and Quality
- Mechanics of Materials
- Mechanical Engineering