In order to develop a long range nondestructive testing technology to detect flaws in city gas pipelines, the dispersion curves for the pipe were calculated by Matlab program. Ultrasonic guided waves were generated in city gas pipeline using MsSR 2020 equipment. The magnetostrictive sensor (MsS) technology was developed by Southwest Research Institute for generation ultrasonic guided waves. In this study, we investigated suitability for long range inspection of city gas pipes in Korea [KS D 3631] using MsS guided waves technique. The dispersion curves obtained from the method were calculated by Matlab program. In order to determine an ideal inspection frequency for detecting various flaws in the city gas pipes, we analyzed signals acquired in each frequencies (32 kHz, 64 kHz, 128 kHz, and 256 kHz) at the end of them. From the results, it was identified that the circumferential flaw in them could suitably be detected at 64 kHz and 128 kHz.
Long range inspection of city gas pipeline using ultrasonic guided waves
Weitbereichsprüfung von Stadtgasleitungen mittels geführter Ultraschallwellen
2006
5 Seiten, 10 Bilder, 2 Tabellen, 12 Quellen
Aufsatz (Konferenz)
Englisch
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