Research on Over-Ground Electromagnetic Inspection Technique for Buried Pipelines

Abstract:

Most of pipeline-inspection techniques above ground can only locate the damages of the pipeline anticorrosive coating and give no information regarding the metal loss defects. Based on the detection and analysis of the AC magnetic field around the pipeline, this paper presents an alternative technique, which is able to detect and distinguish the metal loss defects. It turns out that the inspection based on lock-in amplification technique has a higher magnetic induction resolution of 10e-10T. And the analysis of frequency spectrum on magnetic field can be applied to recognize the metal loss defects on buried pipelines effectively.

• Periodical: Applied Mechanics and Materials (Volumes 239-240)
• Pages: 293-300
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.239-240.293
• Online since: December 2012
• Authors: Shuang Hao Lu, Zan Dong Han, Wei Bin Wang, Zhan Jun Feng
• Keywords: Defect Recognition, Low Frequency AC Magnetic Field, Over-Ground Inspection, Weak Magnetic Field Detection

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