ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The wall thinning due to erosion, corrosion and flow accelerated corrosion is one of criticalissues in nuclear industry. To secure against loss of integrity of pipes with a flaw, ASME CodeSection III and Code Case N-597 etc have been used in design and operating stages, respectively.However, despite of their inherent conservatisms, it may reach unanticipated accidents due todegradation at local region. In this paper, a new evaluation scheme is suggested to estimateload-carrying capacities of wall thinned pipes. At first, computational fluid dynamics analysesemploying steady-state and incompressible flow are carried out to determine pressure distributions inaccordance with conveying fluid. Then, the discriminate pressures are applied as input condition ofstructural finite element analyses to calculate local stresses at the deepest point. A series of combinedanalyses were performed for different fluid flow velocities as well as d/t, Rm/t and l/t ratios. Theefficiency of proposed scheme was proven from comparison with conventional analyses results and itis recommended to consider the fluid structure interaction effect for exact integrity evaluation
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.670.pdf
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