Research on High-Frequency Ultrasonic Guided Waves In-service inspection of Tank Bottom

In the oil, gas and other chemical industries, different degree of damages, such as corrosion, thinning and even perforation often appears on the tank bottom after a long time operation, which affects the safety of production. The artificial blocks simulating the tank edge were inspected by using high-frequency ultrasonic guided waves of mode S0, and influences on testing capacities of high-frequency ultrasonic guided waves in the different conditions were obtained. Based on the experiment, the tank edge plate was detected successfully by means of the large area and in-service rapid inspection, and the tank corrosion defects at the edge of the plate were found. Through artificial blocks contrast experiment and in-service inspection, it is concluded that the corrosion testing of tank edge floor by high-frequency guided waves is feasible.