Study on Dynamic Erosion Behavior of 20# Steel of Natural Gas Gathering Pipeline

Abstract

In this paper, a finite element model for the particle-impact target is established for the abrasion erosion failure behavior of 20# steel used in natural gas gathering pipelines. e JC plastic model and failure criterion are used in the model to simulate the failure and damage of the material, and the reliability of the model was verified by comparison with experimental data. e dynamic behavior of particle erosion was studied by using this model. e changes of energy, stress, and morphology at the microscopic level were analyzed. e influence of particle shape, particle size, impact velocity, and impact angle on the erosion rate of 20# steel was obtained. e model is further used to study the influence mechanism of stress interference on erosion damage behavior under multiparticle random drop impact.

CFD-Based Erosion and Corrosion Modeling of a Pipeline with CO2-Containing Gas–Water Two-Phase Flow

“…However, the FAC of a natural gas pipeline is significantly different from liquid-solid two-phase flow corrosion and multiphase flow corrosion. In an actual pipeline transport process, because of the change in the elbow angle, each part of the pipeline exhibits a water hammer phenomenon to different extents, causing a change in the wall shear stress [23][24][25]. Most natural gas pipeline failures occur in these areas.…”