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
1G.S. Pisarenko Institute for Problems of Strength of NAS of Ukraine. 2 Timiryazevska Str., 01014, Kyiv, Ukraine.
E.O. Paton Electric Welding Institute of NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
LLC «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.
stress, strain, load, damage, structuroscope, coercive force
1. Lepesh, G.V. (2015) Modern methods and means for diagnostics
of equipment of engineering systems of buildings
and facilities. Tekhniko-Tekhnologicheskie Problemy Servisa,
4(34), 3–8 [in Russian].
2. Lepesh, G.V. (2015) Diagnostics and comprehensive servicing
of engineering technical systems and equipment of buildings
and facilities. Ibid., 5(35), 6–16 [in Russian].
3. GOST 8732-78: Seamless hot-deformed steel pipes. Range
of sizes [in Russian].
4. ТU 14-3-377: Steel pipes welded straight-seam for the main
gas and oil pipelines. Specifications [in Russian].
5. Software package ASTRA-MAGISTR - 2011 (version 201010).
Automated computation of the main pipelines for static and
cyclic strength, seismic impact, vibration strength and unsteady
dynamic processes in keeping with the requirements
of SNiP 2.05.06-85 norms [in Russian].
6. (1990) Strength of welded joints under alternating loads. Ed.
by V.I. Trufyakov. PWI. Kiev, Naukova Dumka.
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
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