Journal of Failure Analysis and Prevention

, Volume 7, Issue 1, pp 6–11 | Cite as

Failure Analysis of Corroded Tube–Tubesheet in an Oxy-chlorination Reactor

Case History

Abstract

After the replacement of a 20-year-old oxy-chlorination reactor, the top tube–tubesheet of the newly installed reactor was seriously corroded and lasted for only 40 days. Samples extracted from the retired and new tube–tubesheet were examined to identify the possible causes for the failures. Due to the corrosion, the sealing design (tube expansion followed by seam weld) in the tube–tubesheet was not a successful methodology to prevent leakage in this chemical process. However, this short-term breakdown is attributed to the operating conditions (operating pressure and service temperature) in this petrochemical refinery, because no major discrepancy existed in the material characterization of the new and retired top tube–tubesheet.

Keywords

Heat-exchanger failure Corrosion Service exposure 

References

  1. 1.
    Seamless nickel and nickel alloy condenser and heat-exchanger tubes. ASTM B 163-98aGoogle Scholar
  2. 2.
    Pressure vessel plates, carbon steel, for moderate- and low temperature service. ASTM A 516/A 516M-90Google Scholar
  3. 3.
    Boiler and Pressure Vessel Code. ASME, Section VIII, Div. IGoogle Scholar
  4. 4.
    Materials and Applications-Part 1, Welding handbook, AWS, 8th ed. (1996)Google Scholar

Copyright information

© ASM International 2007

Authors and Affiliations

  1. 1.Department of Mechanical Engineering Cheng Shiu UniversityNeausong, KaohsiungTaiwan

Personalised recommendations