Failure Analysis of Reformer Tubes
- 228 Downloads
This paper presents a failure analysis performed to investigate cracking observed in reformer tubes. Thorough investigation showed that the tubes failed by thermal shock. No signs of advanced creep failure could be observed near the ruptures or across the microstructure. Also, no material-related abnormalities were observed in the tube microstructure. The reformer tube material is suitable for the application, and there is no need for metallurgy upgrade. It is recommended that reformer operating, start-up and shut down procedures be followed to ensure safe and sustainable operation. The condition of un-replaced tubes that had been exposed to the extreme thermal cycles has to be frequently monitored.
KeywordsReformer tubes GX40CrNiSi25-20 Thermal shock
- 1.Documents provided by the plantGoogle Scholar
- 2.Damage Mechanisms Affecting Fixed Equipment in the Refining Industry API Recommended Practice 571 Second Edition, April 2011Google Scholar
- 3.Failure Analysis and Prevention. Metals Handbook, vol. 11. (American Society for Metals, Metals Park, 2002)Google Scholar
- 6.Schmidt + Clemens Centracero. Centralloy 4848 micro. Material Data sheet; Revision No. 10-02, Schmidt + Clemens GmbH + Co.KG, February 2010Google Scholar