Abstract
Pipeline leakage and corrosion are two serious threats to pipeline safety operation. Therefore, to ensure the safety operation of long-distance pipeline, it is of great significance to conduct pipeline monitoring. Since hoop strain is an effective indicator to reflect the inner pressure fluctuation and the wall thickness reduction of the pipeline, a method of monitoring leakage and corrosion simultaneously was proposed based on hoop strain measurement. In order to test the hoop strain variation, this paper introduces a fiber Bragg grating (FBG) strain hoop sensor. To verify the monitoring method and the performance of this FBG strain sensor, a pipeline leakage simulation experiment and corrosion simulation experiment were conducted on an actual pipeline and a polyvinyl chloride (PVC) pipe model, respectively. The experimental results demonstrate that the pipeline leakage and corrosion can be detected by the FBG hoop strain sensor. The FBG strain hoop sensor is a promising device in pipeline safety monitoring.
Highlights
Pipeline is an important means to transport oil and gas through long distance [1,2]
The numerical analytical results show a linear variation of the variation of the hoop strain with a regression coefficient over 0.999, which demonstrates that the hoop hoop strain with a regression coefficient over 0.999, which demonstrates that the hoop strain is in strain is in inverse proportion to the wall thickness of pipeline strictly
A method, based on hoop strain measurement, waswas proposed to detect pipeline corrosion andand based on hoop strain measurement, proposed to detect pipeline corrosion leakage simultaneously
Summary
The outer diameter and the wall thickness of the pipeline length of of 600 m The outer diameter and the wall thickness of the pipeline length are mm and mm, respectively. The pipeline leakage was by the are mm and mm, respectively. The pipeline leakage was simulated simulated by opening opening the existing existing are 219 mm and 6 mm, respectively. The pipeline leakage was simulated by opening the existing valves valves
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