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Failure Analysis of a High-Pressure Steam Pipeline

[+] Author Affiliations
Jin Shi, Wen Liu, Guoshan Xie

China Special Equipment Inspection and Research Institute, Beijing, China

Kai Zhang

Nanjing University of Technology, Nanjing, China

Guoqing Ye, Wurong Li

Sinopec Luoyang Company, Luoyang, China

Paper No. PVP2015-45890, pp. V01BT01A044; 7 pages
doi:10.1115/PVP2015-45890
From:
  • ASME 2015 Pressure Vessels and Piping Conference
  • Volume 1B: Codes and Standards
  • Boston, Massachusetts, USA, July 19–23, 2015
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5693-2
  • Copyright © 2015 by ASME

abstract

In this paper, a failure analysis was performed on a high-pressure steam pipeline, which was burst after service in a chemical plant for 12 years. The burst field was investigated and the fragments were observed. Microstructures of the pipeline were analyzed by optical microscope (OM) and scanning electron microscope (SEM). The mechanical properties tests, including tensile testing and Charpy V notch impact testing, were performed on specimens removed from the high-pressure steam pipeline. The impact testing results showed that toughness of the material was poor and little resistance against cracking extension. According to further analysis, strain aging was the dominant mechanism of the failure. Some inspection approaches were recommended to prevent similar failures.

Copyright © 2015 by ASME

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