Impact of Internal and External Defects on Ultimate Load of Large Diameter X80 Steel Pipelines: An ABAQUS FEA Study

Abstract

This study focuses on the D1016 × 18.4 X80 pipeline segment in the river crossing section of the Myanmar-China natural gas pipeline project, examining its ultimate internal pressure load. To determine this load, both the plastic failure criterion and the double elastic slope criterion are employed. Utilizing the ABAQUS finite element analysis software, the research investigates the impacts of internal and external defect depth, length, and width on the pipeline's ultimate load.