Assessment of High-Temperature Hydrogen Attack Using Advanced Ultrasonic Array Techniques

Lozev, Mark; Neau, Guillaume; Yu, Liangli; Eason, Thomas J.; Orwig, Steve E.; Collins, Richard Clark; Mammen, P.K.; Reverdy, F.; Lonne, Sébastien; Wassink, Casper; Cence, Hugo; Chew, Joe

doi:10.32548/2020.me-04183

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Even though phased array measurements are included in recommended practices, the TFM method allows one to significantly increase the resolution and to detect cracks at earlier stages. It has been demonstrated that TFM can detect stage 2 HTHA with a crack size of 300 µm [23], while the results obtained in this paper support such statements. On the other hand, the results using TULA probes appear to be quite novel and demonstrate that such a technique can be used with similar confidence as TFM.…”

Section: Discussionsupporting

confidence: 72%

“…Different ultrasonic techniques are frequently used as a primary tool for determining the extent of hydrogen damage, namely, acoustic emission, non-linear ultrasonic testing, Crack Indication Density (CID) method, tri-lateral phased array scanning, advanced veloc-ity ratio (AVR), advanced ultrasonic backscatter technique (AUBT), time of flight diffraction (TOFD), TULA (TOFD ultra low angle) and total focusing method (TFM) [17,[19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Analysis of Ultrasonic NDT Techniques for the Detection and Characterisation of Hydrogen-Induced Cracking

et al. 2022

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The article is devoted to the investigation of ultrasonic inspection techniques suitable for detecting hydrogen-induced cracking (HIC) and a high-temperature hydrogen attack (HTHA), which are of great importance in petrochemical and refinery industries. Four techniques were investigated: total focusing method (TFM), advanced velocity ratio (AVR) measurement, advanced ultrasonic backscatter technique (AUBT) and time of flight diffraction method using ultra low angle ultrasonic transducers (TULA). The experimental investigation has been carried out on two carbon steel samples cut off from a heat exchanger of an oil refinery and potentially affected by HIC. It was shown that the AVR technique did not reveal any damage and was not effective in the case of the investigated samples due to a thin damage zone with respect to the total thickness of the samples. The AUBT method enabled us to indicate and classify the presence of the hydrogen-induced damage; however, it is complicated to use in practise due to the need perform measurements exactly at the same position using two transducers of different frequencies. The method is more suitable for the verification of damage at a particular position, rather than for scanning. Both other methods—TFM and TULA—enabled us to identify the presence of HIC in large areas of samples. The obtained results have been verified using a metallographic analysis of the section cut from the side of the sample. The results of metallographic examinations have been compared with indications observed using above mentioned techniques and a good correspondence was obtained. It was demonstrated, that the TFM method can detect cracks with dimensions close to 200 µm, while larger cracks of 2 mm were observed very evidently using a 7.5 MHz phased array. Overall, the results suggested that the TULA method is the most suitable method for the primary detection of hydrogen-induced cracking, while the TFM is recommended for the precise assessment of the extent of the detected cracking.

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Section: Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Ultrasonic NDT Techniques for the Detection and Characterisation of Hydrogen-Induced Cracking

et al. 2022

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Processing Plants Damage Mechanisms and On-stream Inspection Using Phased Array Corrosion Mapping—A Systematic Review

Lean Tai,

Hameed Sultan,

Shahar

2024

JST

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This review aims to study the process plant damage mechanisms published by previous research, such as general corrosion, localised corrosion, and stress corrosion cracking. This review was conducted by analysing the current application of the common inspection method and technique and focusing on the phased array ultrasonic testing application. In order to further the current study, the review seeks direction on evaluating phased array corrosion mapping techniques to detect corrosion and metal loss during plant operation and minimise the plant’s need for maintenance. This systematic literature review provides a better understanding of the current damage mechanisms and shows the possibility of an extended future study.

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Assessment of High-Temperature Hydrogen Attack Using Advanced Ultrasonic Array Techniques

Cited by 2 publications

References 6 publications

Comparative Analysis of Ultrasonic NDT Techniques for the Detection and Characterisation of Hydrogen-Induced Cracking

Comparative Analysis of Ultrasonic NDT Techniques for the Detection and Characterisation of Hydrogen-Induced Cracking

Processing Plants Damage Mechanisms and On-stream Inspection Using Phased Array Corrosion Mapping—A Systematic Review

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