Pipelines are widely used for the transportation of hydrocarbon fluids over millions of miles all over the world. The structures of the pipelines are designed to withstand several environmental loading conditions to ensure safe and reliable distribution from point of production to the shore or distribution depot. However, leaks in pipeline networks are one of the major causes of innumerable losses in pipeline operators and nature. Incidents of pipeline failure can result in serious ecological disasters, human casualties and financial loss. In order to avoid such menace and maintain safe and reliable pipeline infrastructure, substantial research efforts have been devoted to implementing pipeline leak detection and localisation using different approaches. This paper discusses pipeline leakage detection technologies and summarises the state-of-the-art achievements. Different leakage detection and localisation in pipeline systems are reviewed and their strengths and weaknesses are highlighted. Comparative performance analysis is performed to provide a guide in determining which leak detection method is appropriate for particular operating settings. In addition, research gaps and open issues for development of reliable pipeline leakage detection systems are discussed.

Recent Advances in Pipeline Monitoring and Oil Leakage Detection Technologies: Principles and Approaches

Variational mode decomposition provides a feasible method for non-stationary signal analysis, but the method is still not adaptive, which greatly limits the wide application of the method. Therefor...

A new fault diagnosis method based on adaptive spectrum mode extraction

Transient wave-based methods for anomaly detection in fluid pipes: A review

Recursive variational mode extraction and its application in rolling bearing fault diagnosis

An improved variational mode decomposition method based on particle swarm optimization for leak detection of liquid pipelines

Effect of rubber washers on leak location for assembled pressurized liquid pipeline based on negative pressure wave method

Leakages in pipelines can cause serious consequences, such as economic loss, or fire and explosion. Hence, leak detection and location techniques are of crucial importance for pipeline maintenance, safety of industry facilities and environment. A modified transient-based method is proposed in this paper for leak detection and location in a reservoir-pipe-valve (RPV) system. The leak location model is based on the time when a pressure wave propagates from the valve to the leak location and back again. Furthermore, in the leak detection model, the one-dimensional unsteady friction model is introduced into Method of Characteristics (MOC). Then, the governing equations are derived as a ternary system of equations, in which the unknown parameters, especially leak size coefficient, are obtained by analyzing the first transient pressure wave. To validate the method efficiency, both one leak and two leaks situations are taken into consideration in simulation. The simulated results show notable correlations between the model and real leak locations. Additionally, the errors between calculated and actual values of the parameters remain in acceptable ranges. Finally, the developed method is verified by experimental data, and the results demonstrate that it has high accuracy and shows a great performance in leak detection and location.

Leak detection and location in liquid pipelines by analyzing the first transient pressure wave with unsteady friction

The invention relates to a experimental system for scientific research, in particular to a pipeline leakage detecting and positioning experimental system and a detection method thereof, and the system is used for realizing detection and positioning experiments on leakage of long-distance gas conveying pipelines and long-distance liquid conveying pipelines by virtue of different leakage detection methods. The pipeline leakage detecting and positioning experimental system comprises a conveying pipeline, a medium conveying device, a negative-pressure wave detection device and an acoustic emission detection device; the medium conveying device comprises a conveying pipeline, a medium container, a surge tank, a water pump, an oil pump, a water tank outlet flowmeter, a water tank inlet flowmeter, an oil tank outlet flowmeter, an oil tank inlet flowmeter, a nitrogen cylinder outlet valve, a water tank outlet valve and an oil tank outlet valve; a bent part of the conveying pipeline is of a U-shaped pipeline, and the rest part of the conveying pipeline is a straight pipeline section; the negative-pressure detection device comprises a pressure sensor, an electromagnetic flowmeter, a data acquisition card and a computer; the acoustic emission detection device comprises an acoustic emission sensor, a signal preamplifier, an acoustic emission detection instrument and a computer; the acoustic emission detection instrument is used for processing signals, and transmitting the signals to the computer of the acoustic emission detection instrument so as to analyze the signals.

Pipeline leakage detecting and positioning experimental system and detection method thereof

The invention relates to a fire extinguisher device, in particular to a full-size three-phase-jet foam generating device, wherein the full-size three-phase-jet foam generating device can be used not only on site but also in laboratory. The full-size three-phase-jet foam generating device comprises a liquid supplying device, a foam generating device and a jetting device. The liquid supply device is arranged in front of the foam generating device. The liquid supplying device provides foaming liquid through a screw pump. The jetting device is arranged on the back of the foam generating device. The liquid supplying device comprises an engine, a foaming slurry tank, a stirring paddle and the screw pump. The filter screen is arranged at the bottom of the foaming slurry tank. A first valve is arranged on a slurry inlet section below the filter screen. The slurry inlet section is connected with a suction inlet of the screw pump. An exhaust port of the screw pump is connected with the foam generating device. The foam generating device comprises a mixing section, a foam generating section and an outlet section. The front end of the mixing section is connected with the exhaust port of the screw pump. The pipe wall of the front portion of the mixing section is provided with a foaming agent feeding pipe. A second valve is arranged on the upper portion of the foaming agent feeding pipe. An air inlet pipe is arranged on the pipe wall of the front portion of the foam generating section. A third valve is arranged on the air inlet pipe.

Shen Guodong

Papers

An improved variational mode decomposition method based on particle swarm optimization for leak detection of liquid pipelines

Effect of rubber washers on leak location for assembled pressurized liquid pipeline based on negative pressure wave method

Leak detection and location in liquid pipelines by analyzing the first transient pressure wave with unsteady friction

Pipeline leakage detecting and positioning experimental system and detection method thereof

Full-size three-phase-jet foam generating device