Advanced Materials Research Vol. 1052

Abstract: Gathering pipeline is used for transporting crude gas without purification in natural gas mine, it has short transmission distance, small diameter, pressure changes and other characteristics . In the natural gas gathering and transportation process, the carrying effect of high pressure and high speed gas, water, sand, acidic medium and other untreated impurities could induce flow corrosion in gas pipeline, pipeline components (referred to as the tube), and other ancillary facilities interior. According to the actual failure case of an acidic gas mine pipeline, based on the CO₂ corrosion mechanism, internal flow field analysis of the model and the actual test results, through comparison of numerical results and actual test results, the article gives a research on corrosion location prediction technology in the typical components of natural gas gathering pipeline. The technology has an important significance to guide field inspection, improve the detection efficiency and defect detection rate, and protect the natural gas mine gathering safety.