Pipeline networks are complex systems of ducts used for liquid and gas transportation through long distances. They frequently cross highly populated regions, water supplies or natural reserves. Even small leaks in pipelines can lead to great losses of products and serious damages to the environment before it could be detected. With the purpose to track these leaks, a methodology is proposed for detection of leaks in pipelines based on acoustic method and on analysis of pressure transients generated by leak occurrence. Pressure transients and the sound noise generated by leakage are detected and analysed in a pipeline operating with continuous flow of gas (air) under various operation conditions. The experimental results showed that it is possible to detect leaks in pipelines based on hydraulic transients and on acoustic methods. The acoustic method was decisive for leak detection, since the changes in pressure observed through the pressure transducer was not significant depending on the gas flow rate. The analysis of the signal amplitude for different frequencies shows that the leakage noise signal changes with both leak magnitude and pipeline pressure.
Monitoring pipelines through acoustic method
2009
6 Seiten, 10 Bilder, 5 Quellen
Aufsatz (Konferenz)
Englisch
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