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2020 №03 (03) DOI of Article
2020 №03 (05)

Technical Diagnostics and Non-Destructive Testing 2020 #03
Technical Diagnostics and Non-Destructive Testing #3, 2020, pp. 30-36

From the experience of using non-destructive control methods to assess the technical condition of the pipeline emergency section

O.P. Gopkalo1, P.S. Yukhymets2, G.Ya. Bezlyudko3, R.M. Solomacha3, V.O. Nekhotiashchiy1
11G.S. Pisarenko Institute for Problems of Strength of NAS of Ukraine. 2 Timiryazevska Str., 01014, Kyiv, Ukraine. E-mail: ips@ipp.kiev.ua
2E.O. Paton Electric Welding Institute of NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
3LLC «Special Scientific Developments». PO box 12036, 61184, Kharkiv, Ukraine

An example of diagnosing the technical condition of the emergency section of oil storage pipeline by non-destructive methods of control is given. Proceeding from the results of inspection of an emergency section of the pipeline (measurement of hardness, ovality of pipes and coercive force Нс) the characteristics of static strength of metal pipes were determined, and the relative load, structural condition of metal and level of damages were evaluated. Coercytimetric control showed that the level of total maximum stresses obtained first during the installation of the structure, and then after the accident and restoration of the initial position of the individual elements of the pipeline relative to the supports, was less than 30% of the conditional yield strength of metal. This estimate corresponds to the data of calculations of the stress-strain state (SSS) and is consistent with the results of measuring the ovality of the pipes and the absence of local plastic deformations in the most stressed areas. Coercimetric diagnostics revealed differences in the steel grades used in some sections of the pipeline. 7 Ref., 1 Tabl., 9 Fig.
Keywords: stress, strain, load, damage, structuroscope, coercive force

Received: 05.08.2020


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7. Gopkalo, O.P., Bezlyudko, G.Ya., Kotliarenko, A.A. et al. (2020) Diagnosis of damage to ferromagnetic steels during mechanical loading by results of measurements of coercive force. Tekh. Diahnost. ta Neruiniv. Kontrol, 2, 13-21 [in Ukrainian].

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