Corrosion Risk and Prevention Measures for Drainage Pipeline in East Station of Sulige Gas Field

It was determined that the corrosion form of the drainage elbow in the East station of Sulige gas field was erosion corrosion, according to the corrosion morphology observation, corrosion product detection and field coupon test. Multiphase flow simulation software was used to simulate the distribution characteristics of the medium, wall shear stress and erosion corrosion rate. The simulation results showed that the main influencing factors of erosion corrosion were medium velocity and solid particle content. The inner arc of the elbow was mainly affected by wall shear stress caused by high liquid flow rate, and the outer arc of the elbow was mainly affected by impact wear of solid particles. According to the corrosion risk characteristics of the drainage elbow in the East station of Sulige gas field, it was recommended to use glass fiber reinforced plastic pipe or ceramic lined elbow in high risk locations for corrosion prevention.