LEAK DETECTION OF SHUT-OFF VALVES OF MAIN GAS
PIPELINES BY ANALYZING THE FREQUENCY SPECTRUM
OF THE ACOUSTIC EMISSION SIGNAL ABOUT A GAS LEAK 

Dmitry S. Boyarkin, Technician designer, Scientific and Production Enterprise "Rubin" (2 Baidukova street, Penza, Russia), E-mail: boyarkyndmytry@gmail.com
Viktor D. Yezhizhansky, Engineer, Scientific and Production Enterprise "Rubin" (2 Baidukova street, Penza, Russia), E-mail: vityastalkerxdxd@gmail.com
Dmitry A. Golushko, Candidate of technical sciences, head of department, Scientific and Production Enterprise "Rubin" (2 Baidukova street, Penza, Russia), E-mail: dmitgoluschko@yandex.ru
Aleksandr Yu. Kirsanov, Head of department, Scientific and Production Enterprise "Rubin" (2 Baidukova street, Penza, Russia), E-mail: malamash@yandex.ru
Aleksey V. Lysenko, Candidate of technical sciences, associate professor, associate professor of the sub-department of radio equipment design and production, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: luysenko_av@bk.ru

Background. Prolonged operation of shut-off valves of main gas pipelines leads to gradual wear of the sealing elements of ball valves and valves and a violation of their tightness. Timely detection of leakage of the shut-off valves at an early stage allows you to keep the equipment in working condition and avoid the consequences caused by large volumes of gas leaks. A study of the parameters of the acoustic emission signal of a gas leak has been conducted, the results of which can be applied in the practical implementation of methods for diagnosing shut-off valves to detect gas leaks in case of violation of its tightness. Materials and methods. A simulation of a gas leak through a shut-off valve on a laboratory bench was carried out to simulate a leak. A description of the laboratory stand and a block diagram of a device for recording and analyzing the spectrum of the acoustic emission signal of a gas leak are given. Results and conclusions. The frequency spectra of the acoustic emission signal of a gas leak, taken on a laboratory stand, at various leakage volumes are presented. The measurement results are analyzed, conclusions are drawn about the criteria for determining the leakproofness of the shut-off valves according to the frequency spectrum of the acoustic emission signal of the leak.

pipeline fittings, shut-off valves, ball valve, gas leak, overflow, maintenance, acoustic emission

Boyarkin D.S., Yezhizhanskiy V.D., Golushko D.A., Kirsanov A.Yu., Lysenko A.V. Leak detection of shut-off valves of main gas pipelines by analyzing the frequency spectrum of the acoustic emission signal about a gas leak. Nadezhnost' i kachestvo slozhnykh sistem = Reliability and quality of complex systems. 2025;(1):95–102. (In Russ.). doi: 10.21685/2307-4205- 2025-1-12