Wall thinning caused by the flow of water in power piping systems became a major concern to the nuclear power industries. ASME Code Case N-597-3, “Requirements for Analytical Evaluation of Pipe Wall Thinning,” provides procedures and criteria for Code Class 2 and 3 piping for the evaluation of wall thinning. However, analytical evaluation procedure for Class 1 piping is not provideed in the Code Case. Recent full-scale experiments on locally thinned pipes have supported the development of more contemporary failure strength evaluation methodology for Class 1 piping. These evaluation methodologies are applicable for the loading type of bending, tensile or cyclic bending load. Prior to the failure by bending moment, tensile load or cyclic/seismic load, locally wall thinned pipes shall be considered pressure blow out by the internal pressure itself. This paper introduces the failure of a uniformly thinned cylinder by an internal pressure and describes limitation on wall thinning depth to avoid pressure blow out for Class 1 piping.
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ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
July 23–27, 2006
Vancouver, BC, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4757-8
PROCEEDINGS PAPER
Pressure Blow Out Assessment for Class 1 Piping With Local Wall Thinning
Kunio Hasegawa,
Kunio Hasegawa
Hitachi, Ltd., Hitachi-shi, Ibaraki-ken, Japan
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Katsuyuki Shibata
Katsuyuki Shibata
Japan Atomic Energy Agency, Tokai, Ibaraki-ken, Japan
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Kunio Hasegawa
Hitachi, Ltd., Hitachi-shi, Ibaraki-ken, Japan
Katsuyuki Shibata
Japan Atomic Energy Agency, Tokai, Ibaraki-ken, Japan
Paper No:
PVP2006-ICPVT-11-93122, pp. 759-764; 6 pages
Published Online:
July 23, 2008
Citation
Hasegawa, K, & Shibata, K. "Pressure Blow Out Assessment for Class 1 Piping With Local Wall Thinning." Proceedings of the ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. Volume 6: Materials and Fabrication. Vancouver, BC, Canada. July 23–27, 2006. pp. 759-764. ASME. https://doi.org/10.1115/PVP2006-ICPVT-11-93122
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