A Case of Crude Oil Long-distance Pipeline Testing and Comprehensive Analysis

The outside anti-corrosion integrity test was used to assess a long-distance pipeline of oil purification which had worked for thirty-six years. The results showed that there were many leaking points and parts of pipe were in under-protection. In order to further understand the corrosion and safety situation of pipe body, transient electric magnetic technology was used to inspect the average thickness of pipe body, and physical and chemiscal analyses were used for the old pipe.The results indicated that slight corrosion was observed, both the outside anti-corrosion and effective cathodic protection were very important.