Abstract: Sulfur-containing natural gas production sites often experience internal leakage of valves. Such leakage can lead to the cold venting of sulfur-containing natural gas into the atmosphere through the venting system or cause safety accidents during maintenance and repair operations, posing significant risks to the safe production of enterprises. By analyzing the relationship between the sound waves and ultrasonic signals generated by valve leakage, on-site application of ultrasonic valve leakage detection technology has been carried out. The application results show that the ultrasonic valve leakage detection technology can effectively identify valve leakage and has certain promotion and application value for the timely detection of valve leakage in production sites.

Key words: valve, internal leakage, ultrasonic wave, detection