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http://dx.doi.org/10.14773/cst.2012.11.6.225

Technical Review on Fitness-for-Service for Buried Pipe by ASME Code Case N-806  

Park, Sang Kyu (KHNP Central Research Institute)
Lee, Yo Seop (KHNP Central Research Institute)
So, Il su (KEPCO E&C Power Engineering Research Institute)
Lim, Bu Taek (KEPCO E&C Power Engineering Research Institute)
Publication Information
Corrosion Science and Technology / v.11, no.6, 2012 , pp. 225-231 More about this Journal
Abstract
Fitness-for-Service is a useful technology to determine replacement timing, next inspection timing or in-service when nuclear power plant's buried pipes are damaged. If is possible for buried pipes to be aged by material loss, cracks and occlusion as operating time goes by. Therefore Fitness-for-Service technology for buried pipe is useful for plant industry to perform replacement and repair. Fitness-for-Service for buried pipe is studied in terms of existing code and standard for Fitness-for-Service and a current developing code case. Fitness-for-Service for buried pipe was performed according to Code Case N-806 developed by ASME (American Society of Mechanical Engineers).
Keywords
buried pipe; fitness for service; soil load; ASME code case N-806; inspection;
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  • Reference
1 Recommendations for an Effective Program to Control the Degradation of Buried and Underground Piping and Tanks, EPRI 1016456, Revision 1 (2010).
2 Industry Guidance for the Development of Inspection Plans for Buried Piping, NEI 09-14 (2011).
3 Pipeline External Corrosion Direct Assessment Methodology, SP0501, NACE (2008).
4 ASME Code Case N-806 Evaluation of Metal Loss in Class 2 and 3 Metallic Piping Buried in a Back-filled Trench, Section XI, Division 1, draft 15 (2012).