Abstract: Because of the crude oil medium, big diameter, insulating layer and complex constructure, the oil process pipeline couldn’t be inspected rapidly by traditional NDT methods. This article demonstrated the process of experimental Process Pipeline testing in a large oil transport station of SINOPEC and proposed the principle of from distance to contact and from rough screening to exact testing, by using the technologies of Low Frequency Guided Wave, High Frequency Guided Wave, Magnetic Stress, Phased Array, UT C-Scan testing. At last, this article summarized the suitability and limitation of those technologies in Process Pipeline testing.