The high-pressure hydrogenation cracking unit is the core equipment system in the aromatic hydrocarbon factory, which is subjected simultaneously to the action of hydrogen, high pressure, and high temperature. In this paper, quantitative analysis method of risk-based inspection (RBI) was carried out with a commercially available RBI software. In API 581, the risk situation for each type of equipment in the system was classified into four grades: low-risk grade, medium-risk grade, medium-high-risk grade, and high grade. This is expressed as a risk matrix. The entire risk distribution of 553 equipment and/or piping items of the systems that compose the unit was obtained. The hydrocracking reactors and the reactor effluent air coolers are in the “medium-high-risk” category. Based on the RBI results, an optimum inspection plan was developed by the author to reduce the risk level for the hydrogenation cracking unit. Upon validation of the inspection activity in 2004, it is concluded that the optimum inspection plan was in compliance with the engineering specification of the aromatic hydrocarbon factory.
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April 2009
Technical Briefs
Risk-Based Inspection Analysis for High-Pressure Hydrogenation Cracking Unit
Jian-Ping Zhao
Jian-Ping Zhao
School of Mechanical and Power Engineering,
Nanjing University of Technology
, Nanjing, Jiangsu 210009, China
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Jian-Ping Zhao
School of Mechanical and Power Engineering,
Nanjing University of Technology
, Nanjing, Jiangsu 210009, ChinaJ. Pressure Vessel Technol. Apr 2009, 131(2): 024503 (6 pages)
Published Online: January 27, 2009
Article history
Received:
November 5, 2006
Revised:
January 31, 2008
Published:
January 27, 2009
Citation
Zhao, J. (January 27, 2009). "Risk-Based Inspection Analysis for High-Pressure Hydrogenation Cracking Unit." ASME. J. Pressure Vessel Technol. April 2009; 131(2): 024503. https://doi.org/10.1115/1.3006949
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