Leak detection and localization of gas pipeline system based on wavelet analysis

Pipelines are one of great important components for gas and petrochemical industries. Normally, they are used to transport gas by hundreds or even thousands of miles. It is a momentous task to keep the gas pipeline under safety operation. Leak detection and localization mechanisms play an important role in the management of a gas pipeline system. In this paper, wavelet transform was used to detect local singularities in the pressure time history due to the presence of a leak. In order to test the performance of the proposed method, a practical test rig has been built. The experiment results showed the accurate and robustness of the proposed leak detection and localization methodology.