Technical Diagnostics and Non-Destructive Testing, 2026, №01

2026 №01 (04)

DOI of Article 10.37434/tdnk2026.01.05

2026 №01 (01)

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"Tekhnichna Diahnostyka ta Neruinivnyi Kontrol" (Technical Diagnostics and Non-Destructive Testing) #1, 2026, pp. 47-53

Analysis of signal structure in high-density polyethylene pipe inspection using the time-of-flight diffraction technique

S.M. Glabets¹, V.S. Eremenko¹, Yu.V. Kuts^1,2

¹National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute». 37 Beresteysky Ave., 03056, Kyiv, Ukraine. E-mail: .glabets@gmail.com
²Institute of General Power Engineering of the NAS of Ukraine. 172 Antonovycha Str., 03150, Kyiv, Ukraine. E-mail: y.kuts@ukr.net

The article presents the results of experimental studies of the subsurface and bottom signals obtained during the inspection of thick-walled high-density polyethylene (HDPE) pipes using the time-of-flight diffraction (ToFD) method. The experimental signals were obtained using an OmniScan SX ultrasonic flaw detector. Analysis of the signal envelope and phase was performed in the MatLab environment. It is shown that the envelope and frequency of the received signals, in particular the subsurface and bottom ones, differ significantly from the nominal values of the respective characteristics of excitation signals of the piezoelectric transducers, which must be taken into account during inspection and interpretation of the testing results, as well as in the search for and justification of new diagnostic features. 19 Ref., 8 Fig.
Keywords: ultrasonic nondestructive testing, time-of-flight diffraction, welded joint of polyethylene pipes

Received: 09.02.2026
Received in revised form: 27.03.2026
Accepted: 10.04.2026
Posted online: 23.04.2026

References

1. Silk, M.G., Lidington, B.H. (1975) The potential of scattered or diffracted ultrasound in the determination of crack depth. Non-Destructive Testing, 8(3), 146-151. https://doi.org/10.1016/0029-1021(75)90024-9
2. Taghipour, M.H. (2015) Study and evaluation of advanced TOFD method for inspection of polyethylene pipes butt welding. J. of Physical Science and Application, 5(5), 349-355. https://doi.org/10.17265/2159-5348/2015.05.005
3. Charlesworth, J.P., Temple, J.A.G. (2001) Engineering applications of ultrasonic time-of-flight diffraction. 2nd Ed. Baldock: Research Studies Press.
4. Ginzel, E. (2025) CIVA confirmation of frequency dependence of TOFD lateral wave. University of Waterloo. e-Journal of Nondestructive Testing. https://doi.org/10.58286/31565
5. Boháčik, M., Mičian, M., Koňár, R., Hlavatý, I. (2017) Ultrasonic testing of butt weld joint by TOFD technique. Manufacturing Technology, 17(6), 842-847. https://doi.org/10.21062/ujep/x.2017/a/1213-2489/MT/17/6/842
6. Temple, J.A.G. (1984) The amplitude of ultrasonic time-offlight diffraction signals compared with those from a reference reflector. Int. J. of Pressure Vessels and Piping, 16, 145-159. https://doi.org/10.1016/0308-0161(84)90063-2
7. Mayworm, R.C., Alvarenga, A.V., Costa-Félix, R.P.B. (2015) A metrological based realization of time-of-flight diffraction technique. Physics Procedia, 70, 590-593. https://doi.org/10.1016/j.phpro.2015.08.029
8. Nath, S.K., Balasubramaniam, K., Krishnamurthy, C.V., Narayana, B.H. (2010) Reliability assessment of manual ultrasonic time-of-flight diffraction inspection for complex geometry components. NDT & E International, 43(2), 152-162. https://doi.org/10.1016/j.ndteint.2009.10.007
9. Ogilvy, J.A., Temple, J.A.G. (1983) Diffraction of elastic waves by cracks: Application to time-of-flight inspection. Ultrasonics, 21(6), 259-269. https://doi.org/10.1016/0041-624X(83)90058-6
10. Crawford, S.L., Cumblidge, S.E., Doctor, S.R., Hall, T.E., Anderson, M.T. (2008) Preliminary assessment of NDE methods on inspection of HDPE butt fusion piping joints for lack of fusion. Technical Letter Report JCN N6398, Task 2D. Richland, WA: Pacific Northwest National Laboratory. https://doi.org/10.2172/934406
11. Kenzie, B., Speck, J. (2005) Developments in integrity management with TOFD inspection. Inspectioneering J. https://inspectioneering.com/journal/2005-07-01/273/developments-in-integrity-mana
12. DSTU EN 12201-1:2018. Piping systems for water supply, drainage and sewerage under pressure. Polyethylene (PE). Part 1. General provisions. Kyiv, State Enterprise «UkrNDNC» [in Ukrainian].
13. Correia, C. (2017) TOFD examination of HDPE butt weld fusion joints. e-Journal of Nondestructive Testing, 22(6), 1-11. https://www.academia.edu/74628863/TOFD_Examination_of_HDPE_Butt_Weld_Fusion_Joints
14. Pettigrew, I.G. (2014) Advanced ultrasonic inspection of HDPE welds. In: Proceedings of the Offshore Technology Conference Asia. Kuala Lumpur, Malaysia, OTC-25065-MS. https://doi.org/10.4043/25065-MS
15. Qi, G., Li, Y., Ding, N. (2019) Measurement of acoustic basic parameters of polyethylene pipe. IOP Conference Series: Materials Science and Engineering, 677(2), 022050. https://doi.org/10.1088/1757-899X/677/2/022050
16. Ginzel, E. (2025) CIVA confirmation of frequency dependence of TOFD lateral wave. e-Journal of Nondestructive Testing. https://doi.org/10.58286/31565
17. Babak, V., Babak, S., Eremenko, V., Kuts, Y., Myslovych, M., Scherbak, L., Zaporozhets, A. (2021) Models and measures in measurements and monitoring. Cham: Springer. https://doi.org/10.1007/978-3-030-70783-5
18. Babak, V., Babak, S., Eremenko, V., Kuts, Y., Myslovych, M., Scherbak, L. (2023) Application of discrete Hilbert transform to estimate the characteristics of cyclic signals. In: Zaporozhets, A. (ed.) Systems, decision and control in energy IV. Cham: Springer, pp. 93-115. https://doi.org/10.1007/978-3-031-22464-5_5
19. Lazarev, Y.F. (2013) MATLAB Handbook: an electronic textbook for course and diploma design. Kyiv, NTUU «KPI» [in Ukrainian].

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This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Suggested Citation

S.M. Glabets, V.S. Eremenko, Yu.V. Kuts (2026) Analysis of signal structure in high-density polyethylene pipe inspection using the time-of-flight diffraction technique. Technical Diagnostics and Non-Destructive Testing, 01, 47-53. https://doi.org/10.37434/tdnk2026.01.05

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