PREDICTION OF THE FAILURE PRESSURE OF CORRODED PIPELINES SUBJECTED TO A LONGITUDINAL COMPRESSIVE FORCE SUPERIMPOSED TO THE PRESSURE LOADING

摘要

Several methods for the assessment of corroded pipelines subjected to internal pressure loading are currently available, for example, the ASME B31G method, the RSTRENG 0.85dL method, the DNV RP-F101 method for single defects (Part B) and the RPA method. These methods do not take into account the effect of a longitudinal compressive force on the corroded pipeline failure pressure.rnWhen the corroded pipeline is subjected to a longitudinal compressive force superimposed to the pressure loading its failure pressure may be reduced.rnFor a buried pipeline the most common source of a longitudinal compressive force is a temperature loading.rnA ground movement may also produce a longitudinal compressive force in the pipeline.rnIn this paper a new method, named RPA-PLLC, is developed. This method is a modified version of the RPA method and can take into account the effect of a longitudinal compressive force on the corroded pipeline failure pressure.