In the process of oil and gas ball valves testing, if the tightness of the valve is poor, then the oil and gas pipeline valve in the process of use is prone to leakage. The fluid media generated by this leakage will impact the sealing surface, and the impact process is accompanied by an acoustic signal. In order to timely detect valve leakage, relevant personnel need to collect corresponding elastic waves by installing acoustic emission sensors on the outer wall of the valve body, and then convert these elastic waves into an electrical signal to improve the accuracy of valve leakage detection results.

In practical detection, the advantage of acoustic emission method is that it is convenient to operate and observe the detection results. At the same time, the effective disassembly of the valve can be achieved by using this test method, so as to improve the service performance of the valve. Acoustic emission method has low requirements on the detection environment in specific detection operations, and it is difficult to judge some inflammable, explosive, toxic and harmful objects.