Failure Analysis of Fire Tube Sleeve of Heater Treater
- 193 Downloads
The fire tube sleeve of a Heater Treater that was installed in an Oil and Gas processing unit ruptured after a service life of around 15 years. The detailed failure analysis was undertaken on this failed Incoloy 800 (UNS N08800) fire tube sleeve to ascertain the causes and mechanism of failure. The various studies indicated that the exposure of the sleeve to excessive temperature resulted in internal oxidation corrosion and caused of the failure. Additionally, Incoloy 800 is susceptible to sensitization in the temperature range of 540–1095 °C which did occur and resulted in intercrystalline cracks causing grains to fall out of the metal leading to a thickness reduction. The main causes of failure were overheating and the resulting microstructural evolution and recommendations to prevent such failures in future are presented.
KeywordsHigh temperature corrosion Failure analysis Heater Treater Fire tube sleeve Incoloy 800
The authors are thankful to the ONGC management for providing the necessary infrastructure for carrying out the analysis and its gracious approval for publication of this article.
- 1.Institute of Oil & Gas Production Technology, Oil and Natural gas Corporation Ltd.: Technical Manual for Production Operations (Internal Company Document), pp. 279–285. Institute of Oil & Gas Production Technology, Oil and Natural gas Corporation Ltd., Panvel, Navi-Mumbai, India (1992)Google Scholar
- 2.Special Metal Corporation: Special Metals Publication Number SMC-046. Special Metal Corporation, USA (2003)Google Scholar
- 3.ASTM International: Standard Specification for Nickel–Iron–Chromium Alloy Plate, Sheet, and Strip. ASTM Standard Specification B 409-01. ASTM International, USA (2002)Google Scholar
- 4.American Society of Metals: Metallography and Microstructure. In: Metals Handbook, vol. 9, 9th edn, pp. 309–316. American Society of Metals, Metals Park, OH, USA (1988)Google Scholar
- 5.Powell, G.W., Mahmoud, S.E.: Failure Analysis and Prevention. In: Metals Handbook, vol. 11, 9th edn, 266 pp. American Society of Metals, Metals Park, OH, USA (1988)Google Scholar
- 6.American Society of Metals: Corrosion. In: Metals Handbook, vol. 13, 9th edn, pp. 97–100. American Society of Metals, Metals Park, OH, USA (1989)Google Scholar
- 7.Chawla, S.L., Gupta, R.K.: Material Selection for Corrosion Control, pp. 12, 143. ASM International, Materials Park, OH, USA (1997)Google Scholar