Consistency Analysis of Burst Pressure in Corroded Pipelines

Due to the influence of the working environment and transport medium, corrosion defects inevitably occur on the inner and outer walls of the pipelines. Authors have often studied the effect of internal and external corrosion defects on pipe burst pressure based on finite element method and experimental data, respectively. It is not clear whether single-point internal corrosion defects and single- point external corrosion defects are consistent in burst pressure of pipelines. For this reason, this paper establishes the internal and external corrosion defect model of the pipe with the same geometry and material properties based on finite element method. In addition, the burst pressures of pipelines with internal corrosion defects are compared with that with external corrosion defects. Finally, a burst pressure equation is proposed for the pipelines with internal corrosion defects and external corrosion defects. It was found that the burst pressure of the pipelines with internal and external corrosion defects was consistent. It provides a new idea for the establishment of a unified model to predict the burst strength of corroded pipelines.