Constant Group Velocity Ultrasonic Guided Wave Inspection for Corrosion and Erosion Monitoring in Pipes

Instanes, Geir; Pedersen, Audun; Toppe, Mads; Nagy, Péter B.

doi:10.1063/1.3114119

Cited by 11 publications

(3 citation statements)

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“…Conventional long-range UGW inspection is known to suffer from limited measurement sensitivity. Therefore, there has been growing interest in the use of the constant group velocity method [13], guided wave tomography [14,15], and high order modes [16], trading the inspection area for improved detectability. The constant group velocity method estimates average wall thickness loss using a flexural mode propagating between a pair of guided wave transducers located at a distance of several pipe diameters apart.…”

Section: Introductionmentioning

confidence: 99%

An Inspection Technique for Steel Pipes Wall Condition Using Ultrasonic Guided Helical Waves and a Limited Number of Transducers

et al. 2023

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This research utilizes Ultrasonic Guided Waves (UGW) to inspect corrosion-type defects in steel pipe walls, providing a solution for hard-to-reach areas typically inaccessible by traditional non-destructive testing (NDT) methods. Fundamental helical UGW modes are used, allowing the detection of defects anywhere on the pipe’s circumference using a limited number of transducers and measurements on the upper side of the pipe. Finite element (FE) modeling and experiments investigated generating and receiving UGW helical waves and their propagation through varying corrosion-type defects. Defect detection is based on phase delay differences in the helical wave’s signal amplitude peaks between defective and defect-free regions. Phase delay variations were noted for the different depths and spatial dimensions of the defects. These results highlight the phase delay method’s potential for NDT pipeline inspection.

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Section: Introductionmentioning

confidence: 99%

An Inspection Technique for Steel Pipes Wall Condition Using Ultrasonic Guided Helical Waves and a Limited Number of Transducers

et al. 2023

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“…A large number of researchers have been interested in the application of ultrasonic guided waves for nondestructive inspection of plate and tube-like multilayered structures [3,4,5,6,7,8,9,10]. Guided waves are more and more used for ultrasonic nondestructive testing applications [11].…”

Section: Introductionmentioning

confidence: 99%

Quantitative diagnostics of multilayered composite structures with ultrasonic guided waves

Bunget¹,

Friedersdorf²,

Na³

2015

AIP Conference Proceedings

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“…Current GW long-range screening systems cannot provide accurate estimations of defect depth in the presence of complex morphologies [20,21]. Meanwhile, the constant group velocity method [22,23] provides a medium-range solution over a distance of several pipe diameters for a pitch catch arrangement of a pair of transducers; however, this approach lacks spatially localised information to quantify the maximum defect depth of irregularly shaped defects. In the 1990s, Hutchins et al [24] realised that combining multiple transmissions between transmitters and receivers and tomographic techniques increases the amount of spatially localised information.…”

Section: Figure 13: Conventional Ut Wave Path (Left) and Ultrasonic Gw Path (Right)mentioning

confidence: 99%

Enhancement of guided wave tomography for pipelines via improved transduction and signal deconvolution

Caffoor¹

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I would first and foremost like to thank my supervisor, Assistant Professor Fan Zheng, for his guidance and invaluable discussions. Our weekly meetings have always been insightful, and of all his qualities that I hope to emulate, the two that stand out the most would be his patience and kindness. This thesis would not have been possible without him.Special mentions go out to my peers and seniors in the NDT group at Nanyang Technological University of Singapore (NTU). My utmost appreciation in particular to Dr Yu Xudong, Dr Zuo Peng and Captain Danylo Liesevych. They have helped explain fundamental theory of Guided Wave during my first year and have always made themselves available to orientate me to new equipment or methods of simulation. Their friendship will always be cherished greatly. I would also like to thank Dr Chen Jian, for introducing me to COMSOL and for teaching me methods of modelling PZTs, and Dr Rao Jing for providing reconstruction of defects from our on-site inspections at Jurong Island. This Ph.D would not have been possible without the support from my industry sponsor, Lloyd's Register (LR) and the Economic Development Board of Singapore (EDB). My sincere gratitude to Dr Vynx Lim, the Lead Pipeline Specialist from LR, who has been a haven for discussions on pipelines, whose encouragement and advice have been invaluable and whose experience in the industry is something I hope to attain in my lifetime.Special thanks to the Energy Market Authority of Singapore (EMA) for providing the grant for doing the research on gas pipeline monitoring and SembCorp Gas Ltd for opening their doors to the team from NTU for the monthly on-site inspections.V Finally, and most importantly of all, I would like to thank my parents, Mr. Hamzah Caffoor and Mdm Mariam Homod, for their support and encouragement throughout my Ph.D. I would be remised not to mention my Parents-in-law, Mr. Farid Khan and Mdm.Naeemah Diab, who have supported our little family during the final lap in the Ph.D as well. I am forever indebted to their love and support.To my best friend and wife, Raeesah Khan, my son, Raees Khan Caffoor, and my daughter, Ayla Khan Caffoor, I dedicate this thesis. It will always be us against the world. Love you guys. VI ContentsCONTENTS.

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Constant Group Velocity Ultrasonic Guided Wave Inspection for Corrosion and Erosion Monitoring in Pipes

Cited by 11 publications

References 0 publications

An Inspection Technique for Steel Pipes Wall Condition Using Ultrasonic Guided Helical Waves and a Limited Number of Transducers

An Inspection Technique for Steel Pipes Wall Condition Using Ultrasonic Guided Helical Waves and a Limited Number of Transducers

Quantitative diagnostics of multilayered composite structures with ultrasonic guided waves

Enhancement of guided wave tomography for pipelines via improved transduction and signal deconvolution

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