Defect detection and localization in hydrogen pipelinesusing acoustic emission technique
The structural integrity of hydrogen pipelines is critical for ensuring the safe and efficient transportation of hydrogen as a clean energy carrier. Over time, potential defects such as hydrogen embrittlement-induced cracks, weld defects, and leakages may occur along pipelines stretched across...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | deu |
| Published: |
NDT.net
2025-03-01
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| Series: | e-Journal of Nondestructive Testing |
| Online Access: | https://www.ndt.net/search/docs.php3?id=30855 |
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| Summary: | The structural integrity of hydrogen pipelines is
critical for ensuring the safe and efficient transportation
of hydrogen as a clean energy carrier. Over time, potential
defects such as hydrogen embrittlement-induced cracks, weld
defects, and leakages may occur along pipelines stretched
across long distances. To monitor the health of such
infrastructures in real-time, acoustic emission (AE)
monitoring has emerged as a promising non-destructive
evaluation (NDE) and passive method.
This study investigates the application of AE technique to
detect and localize controlled defects along metal
pipelines. Experiments were conducted on a steel pipe
specimen mounted with AE sensors laid out in a
triangulation array, and a controlled AE source. The AE
signals generated by the source were analysed to identify
characteristic parameters, such as amplitude, frequency,
rise time, counts, and signal duration for early defect
detection. With the sensors laid out in an array
configuration, the AE sources can also be accurately
localised along the pipe walls. Results demonstrate that AE
can effectively in-situ monitor and localise defects in
pipeline, providing valuable insights into the
infrastructure integrity.
Furthermore, triangulation algorithms were employed to
improve defect classification and localization accuracy.
With the accurate localisation of an AE sensor array,
non-destructive testing (NDT) methods can be supplemented
for a more thorough inspection and characterisation of the
localised defect. This work highlights AE testing as a
viable, real-time monitoring tool for enhancing the safety
and reliability of hydrogen pipeline infrastructure.
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| ISSN: | 1435-4934 |