A rapid helium mass spectrometry leak detection method is established to respond to problems of low sensitivity and efficiency in detecting leaks in large vessels. The optimized multistage tandem leak detection system improves leak detection sensitivity by increasing the amount of gas entering the analysis chamber. By involving the main pumping system in the detection process, the effective pumping speed is increased, resulting in a significant reduction in system response time. Additionally, the optimal leak detection vacuum required for maximizing the leak velocity indicating gas movement is determined, thereby further decreasing the system’s response time. Our application demonstrates that the optimized leak detection system increases sensitivity by one to two orders of magnitude, reduces system response time by over 90%, and shortens evacuation time by 7 h. Ultimately, the optimized design of the vacuum system developed for large vessels demonstrates greatly improved leak detection efficiency and overall capability.
{"title":"Optimization and testing of a Mass Spectrometer Leak Detection (MSLD) system","authors":"Guoyun Bai, Xindong Hu, X. Liao, Tao Chen, Rongmin Pan, Yanxia Li, Junlan Chang","doi":"10.32548/10.32548/2023.me-04345","DOIUrl":"https://doi.org/10.32548/10.32548/2023.me-04345","url":null,"abstract":"A rapid helium mass spectrometry leak detection method is established to respond to problems of low sensitivity and efficiency in detecting leaks in large vessels. The optimized multistage tandem leak detection system improves leak detection sensitivity by increasing the amount of gas entering the analysis chamber. By involving the main pumping system in the detection process, the effective pumping speed is increased, resulting in a significant reduction in system response time. Additionally, the optimal leak detection vacuum required for maximizing the leak velocity indicating gas movement is determined, thereby further decreasing the system’s response time. Our application demonstrates that the optimized leak detection system increases sensitivity by one to two orders of magnitude, reduces system response time by over 90%, and shortens evacuation time by 7 h. Ultimately, the optimized design of the vacuum system developed for large vessels demonstrates greatly improved leak detection efficiency and overall capability.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"271 ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139013404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nondestructive testing of the adhesive bond properties of a bonded structure is essential in aviation, automotive, and other industries. In this study, a Lamb wave–based quantitative characterization method is proposed to determine the interfacial stiffness of bonded structures. A theoretical model is established, with which the dispersion relationship of Lamb waves in a bonded structure is investigated. Different interfacial states ranging from a perfect bond to a weak bond are simulated, and the numerical results show the sensitivity of Lamb waves to interfacial stiffness. A lateral excitation method is proposed to enhance the excitation of the interfacial sensitive Lamb wave modes, and laser ultrasonic experiments show the enhancement of the Lamb wave signals on aluminum-epoxy-aluminum samples generated by the lateral excitation method. Then, a rapid construction method of inversion objective function is presented to reconstruct the interfacial stiffness coefficient of a bonded structure, and its functionality is validated via finite element simulations. Finally, the interfacial properties of the samples are reconstructed using the inversion scheme.
{"title":"Inverse Determination Of Interfacial Properties of a Bonded Structure Using Lamb Waves Generated By Laser Lateral Excitation","authors":"Tianming Ye, Wenxiang Hu, Tao Chen, Yanxia Li","doi":"10.32548/2023.me-04319","DOIUrl":"https://doi.org/10.32548/2023.me-04319","url":null,"abstract":"Nondestructive testing of the adhesive bond properties of a bonded structure is essential in aviation, automotive, and other industries. In this study, a Lamb wave–based quantitative characterization method is proposed to determine the interfacial stiffness of bonded structures. A theoretical model is established, with which the dispersion relationship of Lamb waves in a bonded structure is investigated. Different interfacial states ranging from a perfect bond to a weak bond are simulated, and the numerical results show the sensitivity of Lamb waves to interfacial stiffness. A lateral excitation method is proposed to enhance the excitation of the interfacial sensitive Lamb wave modes, and laser ultrasonic experiments show the enhancement of the Lamb wave signals on aluminum-epoxy-aluminum samples generated by the lateral excitation method. Then, a rapid construction method of inversion objective function is presented to reconstruct the interfacial stiffness coefficient of a bonded structure, and its functionality is validated via finite element simulations. Finally, the interfacial properties of the samples are reconstructed using the inversion scheme.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"174 2","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138991734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Self-healing properties of super absorbent polymer (SAP) concrete can reduce the harmful effects of concrete cracking in structures. This study examines the self-healing process of mortars with different SAP content under dry and wet conditions through acoustic emission testing (AE) and elastic wave velocity testing. Findings indicate that the SAP mortar healing process has three stages: rapid water absorption, smooth water absorption, and drying. In a dry environment, increasing SAP content enhances AE activity, indicating internal crack self-healing via further hydration of unhydrated cement particles. In a wet environment, AE activity increases with increasing SAP content during the second healing cycle, indicating self-healing of the mortar matrix. These results suggest the use of SAP concrete could potentially mitigate future structural damage.
超强吸水聚合物（SAP）混凝土的自愈合特性可以减少结构中混凝土开裂的有害影响。本研究通过声发射测试（AE）和弹性波速测试，研究了不同 SAP 含量的砂浆在干湿条件下的自愈合过程。研究结果表明，SAP 砂浆的愈合过程分为三个阶段：快速吸水、平稳吸水和干燥。在干燥环境中，SAP 含量的增加会增强声发射活动，这表明内部裂缝会通过未水化水泥颗粒的进一步水化而自我愈合。在潮湿环境中，在第二个愈合周期中，随着 SAP 含量的增加，AE 活性也会增加，这表明砂浆基质具有自愈合能力。这些结果表明，使用 SAP 混凝土有可能减轻未来的结构损坏。
{"title":"Experimental Study On Acoustic Emission Characteristics of SAP Mortar Self-Healing Process","authors":"Nairan Wang, Yan Wang, Yihui Su, Haitao Zhao","doi":"10.32548/2023.me-04359","DOIUrl":"https://doi.org/10.32548/2023.me-04359","url":null,"abstract":"Self-healing properties of super absorbent polymer (SAP) concrete can reduce the harmful effects of concrete cracking in structures. This study examines the self-healing process of mortars with different SAP content under dry and wet conditions through acoustic emission testing (AE) and elastic wave velocity testing. Findings indicate that the SAP mortar healing process has three stages: rapid water absorption, smooth water absorption, and drying. In a dry environment, increasing SAP content enhances AE activity, indicating internal crack self-healing via further hydration of unhydrated cement particles. In a wet environment, AE activity increases with increasing SAP content during the second healing cycle, indicating self-healing of the mortar matrix. These results suggest the use of SAP concrete could potentially mitigate future structural damage.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139304191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Bianconi, M. Filippucci, G. Pelliccia, G. Rossi, T. Tocci, G. Tribbiani, David Correa
The many advantages of additive manufacturing are particularly noticeable in the fabrication of 4D-printed actuators. Through the selection of specific printing properties and materials, hygroscopic wood polymer composites (WPCs) can be produced and their reaction to humidity can be preprogrammed to achieve the greatest deformations in the shortest time. This responsive behavior makes 4D-printed WPCs suitable for architectural applications, where they can act as passive airflow controllers to improve hygrometric conditions in indoor environments. Image analysis methods have been proven to be reliable to select the best combinations of materials and properties for hygroscopic WPCs but, in some cases, they provide only information on the curvature angles and the instrumentation and software can be expensive. This paper presents an optical flow method for tracking the displacements through a free and open-source software. Starting from a time-lapse video of the sample immersed in water, the analysis returns a matrix composed of the 3D displacement values for each pixel in consecutive frames and the velocity of the displacement, with their visual representation. Such image analysis techniques proved to be suitable to assess the different hygro-responsive behavior under water of 4D-printed WPCs through low-cost equipment without altering their configuration.
{"title":"Nondestructive Analysis On 4D-Printed Hygroscopic Actuators Through Optical Flow-Based Displacement Measurements","authors":"F. Bianconi, M. Filippucci, G. Pelliccia, G. Rossi, T. Tocci, G. Tribbiani, David Correa","doi":"10.32548/2023.me-04311","DOIUrl":"https://doi.org/10.32548/2023.me-04311","url":null,"abstract":"The many advantages of additive manufacturing are particularly noticeable in the fabrication of 4D-printed actuators. Through the selection of specific printing properties and materials, hygroscopic wood polymer composites (WPCs) can be produced and their reaction to humidity can be preprogrammed to achieve the greatest deformations in the shortest time. This responsive behavior makes 4D-printed WPCs suitable for architectural applications, where they can act as passive airflow controllers to improve hygrometric conditions in indoor environments. Image analysis methods have been proven to be reliable to select the best combinations of materials and properties for hygroscopic WPCs but, in some cases, they provide only information on the curvature angles and the instrumentation and software can be expensive. This paper presents an optical flow method for tracking the displacements through a free and open-source software. Starting from a time-lapse video of the sample immersed in water, the analysis returns a matrix composed of the 3D displacement values for each pixel in consecutive frames and the velocity of the displacement, with their visual representation. Such image analysis techniques proved to be suitable to assess the different hygro-responsive behavior under water of 4D-printed WPCs through low-cost equipment without altering their configuration.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"63 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139301479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper studies the effect of the transverse stress component of magnetically isotropic ferromagnetic materials on the magnetic Barkhausen noise (MBN) testing signals under planar bidirectional stress states. Based on the logistic distribution function, a model that can be used to describe the effect of the planar bidirectional stress level on MBN characteristic signals is proposed; the formulated model works within the elastic limit of the magnetically isotropic ferromagnetic materials. Then, the characteristics of the proposed regression model are analyzed by computer simulation. Finally, to validate the proposed regression model, the bidirectional stress experimental data extracted from the published paper is used. The results show that there is a high linear correlation between the actual data and the predicted data of the formulated model. Therefore, it can be proved that the proposed planar bidirectional stress regression model based on the logistic distribution function is feasible, applicable, and valuable.
{"title":"Influence of the Transverse Stress Component of Ferromagnetic Materials on MBN Signals Under Bidirectional Stress Conditions","authors":"Di Jingyu","doi":"10.32548/2023.me-04295","DOIUrl":"https://doi.org/10.32548/2023.me-04295","url":null,"abstract":"This paper studies the effect of the transverse stress component of magnetically isotropic ferromagnetic materials on the magnetic Barkhausen noise (MBN) testing signals under planar bidirectional stress states. Based on the logistic distribution function, a model that can be used to describe the effect of the planar bidirectional stress level on MBN characteristic signals is proposed; the formulated model works within the elastic limit of the magnetically isotropic ferromagnetic materials. Then, the characteristics of the proposed regression model are analyzed by computer simulation. Finally, to validate the proposed regression model, the bidirectional stress experimental data extracted from the published paper is used. The results show that there is a high linear correlation between the actual data and the predicted data of the formulated model. Therefore, it can be proved that the proposed planar bidirectional stress regression model based on the logistic distribution function is feasible, applicable, and valuable.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135687907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the past four decades, microwave imaging has experienced a renaissance. This has happened because of new technology development, improved and robust image reconstruction algorithms, expansion of imaging modalities, and operational friendliness, particularly for nondestructive testing (NDT) applications (e.g., high-resolution, real-time, portable systems). Efforts to push the envelope forward continues. This paper provides a brief background on some of the key works that laid the foundation for these advancements. Next, the focus of the paper shifts to the author’s research group’s contributions to the field since the early 1990s to the present day in developing new imaging methodologies and tools specifically for NDT applications. This paper gives a chronology of these specific developments and illustrates how the desire to address NDT needs and requirements have kept these developmental processes moving forward.
{"title":"Microwave Real-Time and High-Resolution Imaging System Development for NDT Applications: A Chronology","authors":"Zoughi Reza","doi":"10.32548/2023.me-04349","DOIUrl":"https://doi.org/10.32548/2023.me-04349","url":null,"abstract":"In the past four decades, microwave imaging has experienced a renaissance. This has happened because of new technology development, improved and robust image reconstruction algorithms, expansion of imaging modalities, and operational friendliness, particularly for nondestructive testing (NDT) applications (e.g., high-resolution, real-time, portable systems). Efforts to push the envelope forward continues. This paper provides a brief background on some of the key works that laid the foundation for these advancements. Next, the focus of the paper shifts to the author’s research group’s contributions to the field since the early 1990s to the present day in developing new imaging methodologies and tools specifically for NDT applications. This paper gives a chronology of these specific developments and illustrates how the desire to address NDT needs and requirements have kept these developmental processes moving forward.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134914330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper studies the effect of the transverse stress component of magnetically isotropic ferromagnetic materials on the magnetic Barkhausen noise (MBN) testing signals under planar bidirectional stress states. Based on the logistic distribution function, a model that can be used to describe the effect of the planar bidirectional stress level on MBN characteristic signals is proposed; the formulated model works within the elastic limit of the magnetically isotropic ferromagnetic materials. Then, the characteristics of the proposed regression model are analyzed by computer simulation. Finally, to validate the proposed regression model, the bidirectional stress experimental data extracted from the published paper is used. The results show that there is a high linear correlation between the actual data and the predicted data of the formulated model. Therefore, it can be proved that the proposed planar bidirectional stress regression model based on the logistic distribution function is feasible, applicable, and valuable.
{"title":"Influence of the Transverse Stress Component of Ferromagnetic Materials on MBN Signals Under Bidirectional Stress Conditions","authors":"Jingyu Di","doi":"10.32548/me-04295","DOIUrl":"https://doi.org/10.32548/me-04295","url":null,"abstract":"This paper studies the effect of the transverse stress component of magnetically isotropic ferromagnetic materials on the magnetic Barkhausen noise (MBN) testing signals under planar bidirectional stress states. Based on the logistic distribution function, a model that can be used to describe the effect of the planar bidirectional stress level on MBN characteristic signals is proposed; the formulated model works within the elastic limit of the magnetically isotropic ferromagnetic materials. Then, the characteristics of the proposed regression model are analyzed by computer simulation. Finally, to validate the proposed regression model, the bidirectional stress experimental data extracted from the published paper is used. The results show that there is a high linear correlation between the actual data and the predicted data of the formulated model. Therefore, it can be proved that the proposed planar bidirectional stress regression model based on the logistic distribution function is feasible, applicable, and valuable.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134914332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lalith Sai Srinivas Pillarisetti, Gangadharan Raju, Anandamurugan Subramanian
Advanced ultrasonic array–based imaging techniques that rely on A-scan data acquired through individual parallel reception of array elements and subsequent post-processing have shown promising performance by generating high-resolution images. An advanced array-based imaging algorithm called sectorial plane wave imaging (SPWI) has been recently proposed with multimode imaging and rapid inspection capabilities. In this work, the efficiency of the SPWI algorithm is demonstrated and compared to the total focusing method (TFM) and plane wave imaging (PWI) algorithms in detecting different types of common weld defects: lack of sidewall fusion, slag, porosity, toe crack, centerline crack, and root crack. The full matrix capture data acquired over each weld defect using a 32-element linear array on an angular wedge configuration is converted to the PWI matrix data to perform SPWI. The corner and indirect mode SPWI inspection results are able to detect all the weld defects with image quality comparable to that of TFM and PWI, but at a higher processing speed due to the slight compromise over reception focusing, making SPWI a viable advanced ultrasonic array–based imaging technique for inspecting welds.
{"title":"Sectorial Plane Wave Imaging for Weld Inspection Studies","authors":"Lalith Sai Srinivas Pillarisetti, Gangadharan Raju, Anandamurugan Subramanian","doi":"10.32548/2023.me-04312","DOIUrl":"https://doi.org/10.32548/2023.me-04312","url":null,"abstract":"Advanced ultrasonic array–based imaging techniques that rely on A-scan data acquired through individual parallel reception of array elements and subsequent post-processing have shown promising performance by generating high-resolution images. An advanced array-based imaging algorithm called sectorial plane wave imaging (SPWI) has been recently proposed with multimode imaging and rapid inspection capabilities. In this work, the efficiency of the SPWI algorithm is demonstrated and compared to the total focusing method (TFM) and plane wave imaging (PWI) algorithms in detecting different types of common weld defects: lack of sidewall fusion, slag, porosity, toe crack, centerline crack, and root crack. The full matrix capture data acquired over each weld defect using a 32-element linear array on an angular wedge configuration is converted to the PWI matrix data to perform SPWI. The corner and indirect mode SPWI inspection results are able to detect all the weld defects with image quality comparable to that of TFM and PWI, but at a higher processing speed due to the slight compromise over reception focusing, making SPWI a viable advanced ultrasonic array–based imaging technique for inspecting welds.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134914331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With over a century of combined nondestructive testing (NDT) experience, the authors of this article would like to pass along some legacy knowledge of the NDT business from the perspective of services, equipment, training, and certification. Over their multi-decade careers, they have held numerous roles in field deployments, sales, marketing, management, mergers and acquisitions, accounting, government relations, and product development. In all cases, they learned that the key to success in NDT was about providing solutions to customer problems. The authors have experienced firsthand the incredible technical and commercial development of the NDT marketplace and desire to share their insights with the readers of Materials Evaluation.
{"title":"Only the Dead Know NDT: Exploring the Critical and Little-Known Nondestructive Testing Business","authors":"Jim Treat, Bruce Pellegrino","doi":"10.32548/2023.me-04365","DOIUrl":"https://doi.org/10.32548/2023.me-04365","url":null,"abstract":"With over a century of combined nondestructive testing (NDT) experience, the authors of this article would like to pass along some legacy knowledge of the NDT business from the perspective of services, equipment, training, and certification. Over their multi-decade careers, they have held numerous roles in field deployments, sales, marketing, management, mergers and acquisitions, accounting, government relations, and product development. In all cases, they learned that the key to success in NDT was about providing solutions to customer problems. The authors have experienced firsthand the incredible technical and commercial development of the NDT marketplace and desire to share their insights with the readers of Materials Evaluation.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"224 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135053942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stephano Mariani, Sebastian Heinlein, Thomas Vogt, Peter Cawley
The performance of a permanently installed guided wave pipe monitoring system over extended periods has been investigated. Other than at a clamped support, the signals obtained in the three installations reported here have been stable to better than 1% (–40 dB) over periods of 12–24 months, even in hostile oil and gas facility environments. The use of baseline subtraction means that the sensitivity to defects is substantially better than that obtained in one-off inspection; in the two site examples reported here, improvements of 7 and 12 dB relative to one-off interpretation of the A-scan signal were obtained, and changes can be flagged automatically. The improvement in sensitivity is even larger at features such as welds and bends, which give significant reflections even in the absence of damage. The permanently installed system combines long-range guided wave monitoring for localized corrosion patches with eight precise thickness measurements around the pipe circumference, making it possible to monitor the general wall loss rate, as well as detect any more severe, localized corrosion. Permanently installed guided wave monitoring systems are therefore found to be a commercially attractive tool for the assessment of current and future piping integrity.
{"title":"Performance of a Guided Wave Pipe Monitoring System Over Extended Periods of Field Operation","authors":"Stephano Mariani, Sebastian Heinlein, Thomas Vogt, Peter Cawley","doi":"10.32548/2023.me-04335","DOIUrl":"https://doi.org/10.32548/2023.me-04335","url":null,"abstract":"The performance of a permanently installed guided wave pipe monitoring system over extended periods has been investigated. Other than at a clamped support, the signals obtained in the three installations reported here have been stable to better than 1% (–40 dB) over periods of 12–24 months, even in hostile oil and gas facility environments. The use of baseline subtraction means that the sensitivity to defects is substantially better than that obtained in one-off inspection; in the two site examples reported here, improvements of 7 and 12 dB relative to one-off interpretation of the A-scan signal were obtained, and changes can be flagged automatically. The improvement in sensitivity is even larger at features such as welds and bends, which give significant reflections even in the absence of damage. The permanently installed system combines long-range guided wave monitoring for localized corrosion patches with eight precise thickness measurements around the pipe circumference, making it possible to monitor the general wall loss rate, as well as detect any more severe, localized corrosion. Permanently installed guided wave monitoring systems are therefore found to be a commercially attractive tool for the assessment of current and future piping integrity.","PeriodicalId":49876,"journal":{"name":"Materials Evaluation","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135053941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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