Remaining-limitation Analysis of Strength of in-service Oil Pipelines with Part-Through Slots
Yuan yuan,Xu Yingqiang,Lu Guozhi
(Northwestern Polytechnical University, Xi'an,Shanxi,710072,PR China)

Abstract: Safe and reliable operation of in-service oil pipeline is a significa nt topic which is urgently necessary and attractive for the oil and gas storage-transportation circles all over the world. The remaining-limited strength of oil pipelines with part-through slots is analyzed under axial tension, internal pressure and combined internal pressure with axial tension respectively. The load limitation equation for oil pipelines under combined loads is obtained based on Von.Mises criterion. and verified by elastic-plastic finite element method.
Keywords: oil pipeline, part-through slots, remaining-limited strength.