Determination of Flaw Type and Location Using an Expert Module in Ultrasonic Nondestructive Testing for Weld Inspection

AbstractThe possibility for pre-grading of logs throughout the year has been evaluated based on dynamic modulus of elasticity (MOEdynor simplifiedEdyn) by means of frequency-based nondestructive testing (NDTfreq). The challenge is thatEdynis variable in the frozen, partly frozen, and unfrozen states of logs (state of matter). In the unfrozen state, NDTfreqis reliable if the moisture content does not fall below fiber saturation. The state of the matter was tested via temperature measurements of air and log by means of an infrared technique and sensors, and information was evaluated from NDTfreq. The temperature measurements proved to be inefficient for industrial application because of unreliable data and long measurement times, whereas the NDTfreqmeasurements allowed the determination of meaningful damping factors. A sufficient level of predictability for more than 60% of the measurements was found. The log measurements in the partly frozen state are inconclusive becauseEdyndata fluctuate in the presence of both liquid and frozen water. For the completely frozen logs, a correction is introduced as a precaution that avoids an overestimation ofEdynin the unfrozen state.

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Use of Synthetic Flaws to Assess Pipeline Seam Weld Inspection Performance

10.1115/pvp2021-61294 ◽

2021 ◽

Author(s):

Joseph W. Krynicki ◽

Lujian Peng ◽

Gustavo Gonzalez ◽

Neeraj Thirumalai

Keyword(s):

Nondestructive Testing ◽

Cost Effective ◽

Fabrication Technology ◽

Field Validation ◽

Performance Specification ◽

Lack Of Fusion ◽

Naturally Occurring ◽

Weld Inspection ◽

Detection Capabilities ◽

Inspection Performance

Abstract Pipeline seam welds are often inspected using ultrasonic In-Line Inspection (ILI) technologies. The measurement performance specification of an ultrasonic ILI tool is based on simple, planar, machined notches which are very reproducible, but are not representative of the complex flaw morphologies that occur naturally in seams such as hook cracks and tilted lack of fusion flaws. In order to assess ILI performance on naturally occurring flaws, “in-the-ditch” Nondestructive Testing (ITD NDT) is performed to validate a subset of the population of ILI reported features. Due to the limited number, type, and dimensional (height and length) uncertainty of these flaws, the field validation approach has limitations in terms of efficiency and accuracy in determining ILI detection capabilities and sizing performance. Recently, specialized synthetic flaw fabrication technology has been developed and provides complex, natural crack-like morphologies with reliable and reproducible size dimensions. Effective validation spools with flaws (of representative geometries) can be achieved through engineered designs that consider the number, size and shape of manufactured flaws. This enables owners to quickly and reliably assess the performance of both ILI tools and ITD NDT operators. Assessing performance with the synthetic flaw approach provides results that are more comprehensive and cost-effective compared to the typical field validation approach alone. This is because the flaw population is designed rather than randomly selected from excavation data. This paper addresses the design, use and field experience with validation spools. This paper will present the performance of ILI tools and UT examiners based on synthetic flaw qualification exams, and how this supports related ILI and operator validation work.

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Assessment of Air Entrainment in Fresh Cement Paste Using Ultrasonic Nondestructive Testing

Recent Advancement in Conrete Freezing-Thawing (F-T) ◽

10.1520/stp49080s ◽

2010 ◽

pp. 1-1-26 ◽

Cited By ~ 1

Author(s):

Richard M. Kmack ◽

Kimberly E. Kurtis ◽

Laurence J. Jacobs ◽

Jin -Yeon Kim

Keyword(s):

Nondestructive Testing ◽

Cement Paste ◽

Air Entrainment ◽

Ultrasonic Nondestructive Testing

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Weld inspection using real-time radiography Link, R.; Nuding, W.; Wiacker, H.; Busse, H.P. International Advances in Nondestructive Testing, Vol. 14, pp. 143–173 (1989)

NDT & E International ◽

10.1016/0963-8695(90)90646-z ◽

1990 ◽

Vol 23 (3) ◽

pp. 166

Keyword(s):

Nondestructive Testing ◽

Real Time ◽

Weld Inspection

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Acousto-Ultrasonic Technology for Nondestructive Evaluation of Concrete Bridge Members Strengthened by Carbon Fiber–Reinforced Polymer

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198105192800126 ◽

2005 ◽

Vol 1928 (1) ◽

pp. 245-251 ◽

Cited By ~ 1

Author(s):

Mahmut Ekenel ◽

Nestore Galati ◽

John J. Myers ◽

Antonio Nanni ◽

Valery Godínez

Keyword(s):

Carbon Fiber ◽

Nondestructive Testing ◽

Fiber Reinforced Polymer ◽

Carbon Fiber Reinforced Polymer ◽

Ultrasonic Nondestructive Testing ◽

Fiber Reinforced ◽

Reinforced Polymer ◽

Wide Range ◽

Cfrp Sheet ◽

Carbon Fiber Reinforced

Carbon fiber–reinforced polymer (CFRP) composites have been used in a wide range of application areas in bridge rehabilitations because these materials are less affected by corrosive environmental conditions, are known to provide longer life, and require less maintenance. However, the quality control and quality assessment of these new rehabilitation systems should be further improved and standardized. A recent rehabilitation project that used CFRP laminates was done on a bridge in Dallas County, Missouri, by the Missouri Department of Transportation and the Center for Infrastructure Engineering Studies at the University of Missouri–Rolla. The acousto-ultrasonic nondestructive testing technology was performed to detect and image surface defects in the form of delaminations. These were intentionally formed at the CFRP sheet–concrete interface to investigate the ability of this technique. Acousto-ultrasonic nondestructive testing has shown the ability to detect and image the delaminations between CFRP sheet and concrete substrate.

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