Long-distance pipeline is economic,efficienta and evvironmentally as a transport . It plays a unique advantage in natural gas and other energy transport . However,due to long distance pipenline transport,mostly along the desert,marshes,deserts or rivers,so artificial inspection is more difficult;and because of the inevitable aging,corrosion and other natural and man-made damage ,the pipeline leakage occur frequently.It not only caused the loss of country ,but also pollution of the environment.So pipeline maintenance, leakage detection and the safe operation has become an important research topic.
The paper is based on actual projects for the background ,it analysis of the research status and predecessots’ work . First analysis the significance of the pipline detection online to the current pipeline leak problem, and domestic and international pipeline inspection technology of the status quo Survey done, including a brief introduction of the more mature now also more frequent use of magnetic flux leakage detection technology, focusing on the wavelet analysis in the pipeline leak detection of the application, and use of MATLAB wavelet analysis tools to channel the pressure signal analysis practice shows that can be achieved using wavelet analysis of the pipeline leak detection and location.
