Parallel arrangement of oil pipeline and steady-state high-voltage AC power line

In order to identify the corrosion effects of the steady load current on the pipeline when oil pipeline and AC power lines of different voltage levels are laid in parallel, CDEGS model is established considering the types of power lines, steady-state operating current of power line, and other parameters of the power line and pipeline. It is used to simulate and calculate the AC interference-induced corrosion on the oil pipeline depending on voltage level, parallel length, soil resistivity, parallel spacing and pipeline diameter. The results show that the AC interference suffered by the pipeline increases with the increase of voltage level, parallel length and soil resistivity of the interference source, while it decreases with the increase of parallel spacing and diameter. In order to visually analyze the corrosion on pipeline under AC interference, the AC corrosion risk and corrosion rate are predicted and assessed, and corrosion thickness reduction is used to represent the severity of corrosion. The obtained pattern that high voltage power lines affect the pipeline can provide a reference for reasonable route selection and corrosion prevention design of long-distance pipeline.