Effects Of End Loading On The Creep Failure Behaviour Of CrMoV Welds In Main Steam Pipelines
Price
Free (open access)
Transaction
Volume
26
Pages
10
Published
2000
Size
1,041 kb
Paper DOI
10.2495/DM000391
Copyright
WIT Press
Author(s)
T.H. Hyde, W. Sun & A.A. Becker
Abstract
This paper describes an investigation into the effects of end (system) loading on the creep failure behaviour of internally pressurised thick walled pipe welds, using the FE method with simplified axisymmetric models. Steady-state and creep damage analyses were performed for a series of new, service-aged, and repaired welds in main steam pipes in power generation plants. The material properties used were related to CrMoV weldment materials at 640° C. Stress distributions were obtained and failure lives were predicted for each weld situation, under a closed-end condition and with additional axial loading. The rupture stresses showed very little variation across the heat-affected zone (HAZ), in the dominant stress regions, for closed-end loading. However, the variation is more significant when additional axial
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