Theoretical analysis of pipeline with type I dent under the external force

Abstract

As an economical, efficient, and safe material transmission method, pipeline has an irreplaceable role in the petroleum chemical and natural gas industry. There will be a variety of mechanical damage in pipelines due to unknown or known factors, and the dent is the most typical form of mechanical damage. According to the service oil and gas pipeline with type I dent, a simplified calculation model of shell and tube was chosen. The rings and generators in the model were analyzed in the equilibrium state, and the internal pressure was taken into account. Finally, the analytical expression between external force and the indention depth of type I dent was concluded, which can be used to analyze the response of the pressure pipe to the external force, and provides a theoretical guidance for maintaining pipeline in service.