The Paton Welding Journal, 2026, №06

2026 №06 (05)

DOI of Article 10.37434/tpwj2026.06.06

2026 №06 (01)

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The Paton Welding Journal, 2026, #6, 49-55 pages

Characteristics of informational signals in ToFD inspection of HDPE pipes

S.M. Hlabets¹, V.S. Eremenko¹, Yu.V. Kuts^1,2

¹National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 37 Prosp. Beresteiskyi, 03056, Kyiv, Ukraine E-mail: s.glabets@gmail.com
²Institute of General Power Engineering of the NASU 172 Antonovycha Str., 03150, Kyiv, Ukraine

Abstract
The article presents the results of analysis of the subsurface and bottom-wall signals obtained during inspection of thick-walled high-density polyethylene (HDPE) pipes using the Time-of-Flight Diffraction (ToFD) method. The experimental signals were acquired using an OmniScan SX ultrasonic flaw detector. Analysis of the signal envelope and instantaneous phase was performed in the MATLAB environment. It is shown that the envelope and frequency of the received signals, particularly the subsurface and backwall signals, differ significantly from the nominal values of the corresponding characteristics of the ultrasonic probe excitation signals. This factors must be taken into account during inspection, interpretation of testing results, and in the search for new diagnostic features.
Keywords: ultrasonic non-destructive testing, time-of-flight diffraction, welded joint of polyethylene pipes

Received: 09.02.2026
Received in revised form: 27.03.2026
Accepted: 26.06.2026

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Suggested Citation

S.M. Hlabets, V.S. Eremenko, Yu.V. Kuts (2026) Characteristics of informational signals in ToFD inspection of HDPE pipes. The Paton Welding J., 06, 49-55. https://doi.org/10.37434/tpwj2026.06.06

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