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Reliability, Availability and Maintainability Analysis of Steam Turbines Used in an Oil Refinery

[+] Author Affiliations
Anwar Khalil Sheikh, Muhammad Younas

King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

Dahham Matar Al-Anazi

Saudi Aramco, Dhahran, Saudi Arabia

Paper No. PVP2002-1515, pp. 43-52; 10 pages
doi:10.1115/PVP2002-1515
From:
  • ASME 2002 Pressure Vessels and Piping Conference
  • Piping and Component Analysis and Diagnosis
  • Vancouver, BC, Canada, August 5–9, 2002
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4658-X
  • Copyright © 2002 by ASME

abstract

Weibull reliability and maintainability analysis have been used to analyze the time between failures and time to repair data of a group of steam turbines being used in a large oil refinery. Failure history of a set of steam turbines was obtained from the Computerized Maintenance Management System of the plant. Out of 50 steam turbines in operation, 13 are identified as bad actors which have experienced ≥3 failures in five years. The Pareto analysis performed on this set of turbines further narrowed down the 10 most critical (worst performing) turbines. This group of most critical turbines is the primary target for this Weibull reliability and maintainability analysis. The Weibull reliability and maintainability analysis provides an indication of the equipment reliability and maintainability characteristics including their failure rates and repair rates. In addition to the failure and repair data, the associated maintenance cost for this group of turbines was also collected over a period of five years, and the trends in cost increase with respect to time are plotted.

Copyright © 2002 by ASME

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