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Vol.13, No1, 2013, pp.23–27 |
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MODIFICATION OF FAILURE RISK BY THE USE OF HIGH STRENGTH STEELS IN PIPELINES Julien Capelle1, Guy Pluvinage2 1)LaBPS - Ecole Nationale d’Ingénieurs de Metz et Université de Lorraine, Metz, France 2)Fiabilité Mécanique, Conseils Silly sur Nied, France, pluvinage@cegetel.net |
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Abstract The use of new generation of pipe steels with high yield stress increases potentially the risk of brittle fracture. In order to evaluate this risk, safety factors associated with a surface crack and an operating pressure have been evaluated for three pipe steels: X52, X70 and X100. This evaluation has been made using a Failure Assessment Diagram and SINTAP procedure. This analysis has been extended to X120 pipe steel. The use of a Domain Failure Assessment diagram indicates that for this steel a risk of elastic plastic fracture exists. However, for pipe steels X52, X70 and X100, failure occurs potentially by plastic collapse. Keywords: high strength steels, pipeline, failure risk, failure assessment diagram |
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full article (298 kB)
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