Study on Remote Magnetic Detection Technology for External Defects of Small-Diameter Pipelines
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 15, Issue 1
Abstract
Nonpiggable multiproduct pipelines lack effective methods for detecting the pipe’s external defects (PEDs). Therefore, a pipeline remote magnetic detection (PRMD) technology for buried small-diameter pipelines was developed, which can achieve trenchless detection of PEDs. In this paper, an external pipe defect remote detection model is established to reveal the features of the three-dimensional magnetic gradient signal of PEDs. The quantitative relationship between the magnetic gradient modulus and defect depth was analyzed, and the influence of some factors was obtained. Furthermore, a PRMD method was established to detect a 3.56-km buried small-diameter multiproduct pipeline. The diagnostic indicator based on the magnetic gradient modulus is proposed to determine damage levels of defective pipes, which was validated by the excavation inspection results. The results show that the magnetic gradient modulus reaches a peak at PEDs. The maximum magnetic gradient modulus has an exponential relationship with the defect depth. Finally, 10 Level II defects and 19 Level III defects were found in the 3.57-km buried pipeline.
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Data Availability Statement
No data, models, or code were generated or used during the study.
Acknowledgments
This work is funded by the National Natural Science Foundation of China (52174062) and the Natural Science Foundation of Sichuan (2023NSFSC0420).
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 15 • Issue 1 • February 2024
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 24, 2022
Accepted: Jun 26, 2023
Published online: Oct 3, 2023
Published in print: Feb 1, 2024
Discussion open until: Mar 3, 2024
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