Characterization of the Accuracy of the MFL Pipeline Inspection Tools

Salama, Mamdouh M.; Nestleroth, Bruce; Maes, Marc A.; Rodríguez, Carlos Fernández; Blumer, Dave

doi:10.1115/omae2012-83934

Cited by 10 publications

(5 citation statements)

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“…MFL is currently one of the most widely used NDT techniques for pipeline inspection, first introduced in 1969, and it can effectively detect metal loss, cracks, weld defects, etc. [55,56]. When the MFL tool moves through the pipeline, the magnetic flux generated by the magnet is coupled to the pipe wall through the iron brush, forming a magnetic circuit between the pipe wall and the tool.…”

Section: Magnetic Flux Leakage (Mfl)mentioning

confidence: 99%

In-Line Inspection (ILI) Techniques for Subsea Pipelines: State-of-the-Art

Zhu,

Chen,

Lin

et al. 2024

JMSE

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Offshore oil and gas resources play a crucial role in supplementing the energy needs of human society. The crisscrossing subsea pipeline network, which serves as vital infrastructure for the storage and transportation of offshore oil and gas, requires regular inspection and maintenance to ensure safe operation and prevent ecological pollution. In-line inspection (ILI) techniques have been widely used in the detection and inspection of potential hazards within the pipeline network. This paper offers an overview of ILI techniques used in subsea pipelines, examining their advantages, limitations, applicable scenarios, and performance. It aims to provide valuable insights for the selection of ILI technologies in engineering and may be beneficial for those involved in pipeline integrity management and planning.

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Section: Magnetic Flux Leakage (Mfl)mentioning

confidence: 99%

In-Line Inspection (ILI) Techniques for Subsea Pipelines: State-of-the-Art

Zhu,

Chen,

Lin

et al. 2024

JMSE

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show abstract

“…The three-axis high-resolution MFL inspection for the volumetric defects (corrosion and scratch) of long-distance transport pipelines has the dimensional accuracy of ±10%, and its confidence level exceeds 90%, so it can satisfy the regular needs of the inspection of volumetric defects in oil and gas pipelines [ 8 , 46 ]. Nevertheless, three-axis high-resolution MFL inspection is not a mature technology for the inspection and sizing of volumetric defects and crack defects in the pipeline girth weld.…”

Section: Oil and Gas Pipeline Girth Weld Defect In-line Inspectionmentioning

confidence: 99%

Literature Review: Theory and Application of In-Line Inspection Technologies for Oil and Gas Pipeline Girth Weld Defection

Feng

Nie

et al. 2016

Sensors

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Girth weld cracking is one of the main failure modes in oil and gas pipelines; girth weld cracking inspection has great economic and social significance for the intrinsic safety of pipelines. This paper introduces the typical girth weld defects of oil and gas pipelines and the common nondestructive testing methods, and systematically generalizes the progress in the studies on technical principles, signal analysis, defect sizing method and inspection reliability, etc., of magnetic flux leakage (MFL) inspection, liquid ultrasonic inspection, electromagnetic acoustic transducer (EMAT) inspection and remote field eddy current (RFDC) inspection for oil and gas pipeline girth weld defects. Additionally, it introduces the new technologies for composite ultrasonic, laser ultrasonic, and magnetostriction inspection, and provides reference for development and application of oil and gas pipeline girth weld defect in-line inspection technology.

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“…Experimental results confirm its efficacy. Salama [ 30 ] examined the quantification of uncertainties in MFL intelligent pigs, predominantly used for pipeline inspection, by conducting a full-scale pull-through test on a 12-inch pipe to assess detection and sizing uncertainties. Pham [ 31 ] studied the sensitivity of MFL measurement to pipeline magnetization, which is crucial for pipeline inspection.…”

Section: Introductionmentioning

confidence: 99%

Development of an In-Pipe Inspection Robot for Large-Diameter Water Pipes

Jeon,

Jung,

Bae

et al. 2024

Sensors

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This paper describes the development of an in-pipe inspection robot system designed for large-diameter water pipes. The robot is equipped with a Magnetic Flux Leakage (MFL) sensor module. The robot system is intended for pipes with diameters ranging from 900 mm to 1200 mm. The structure of the in-pipe inspection robot consists of the front and rear driving parts, with the inspection module located centrally. The robot is powered by 22 motors, including eight wheels with motors positioned at both the bottom and the top for propulsion. To ensure that the robot’s center aligns with that of the pipeline during operation, lifting units have been incorporated. The robot is equipped with cameras and LiDAR sensors at the front and rear to monitor the internal environment of the pipeline. Pipeline inspection is conducted using the MFL inspection modules, and the robot’s driving mechanism is designed to execute spiral maneuvers while maintaining contact with the pipeline surface during rotation. The in-pipe inspection robot is configured with wireless communication modules and batteries, allowing for wireless operation. Following its development, the inspection robot underwent driving experiments in actual pipelines to validate its performance. The field test bed used for these experiments is approximately 1 km in length. Results from the driving experiments on the field test bed confirmed the robot’s ability to navigate various curvatures and obstacles within the pipeline. It is posited that the use of the developed in-pipe inspection robot can reduce economic costs and enhance the safety of inspectors when examining aging pipes.

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Characterization of the Accuracy of the MFL Pipeline Inspection Tools

Cited by 10 publications

References 0 publications

In-Line Inspection (ILI) Techniques for Subsea Pipelines: State-of-the-Art

In-Line Inspection (ILI) Techniques for Subsea Pipelines: State-of-the-Art

Literature Review: Theory and Application of In-Line Inspection Technologies for Oil and Gas Pipeline Girth Weld Defection

Development of an In-Pipe Inspection Robot for Large-Diameter Water Pipes

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