10.14489/td.2023.12.pp.024-034

2023, 12 December

DOI: 10.14489/td.2023.12.pp.024-034

Zagidulin R.V., Bakiev A. T.
DETERMINATION OF THE PARAMETERS OF STRESS-CORROSION CRACKS OF THE MAIN GAS PIPELINE BASED ON THE RESULTS OF EDDY CURRENT CONTROL
(pp. 24-34)

Abstract. In order to increase the accuracy of estimating the depth of stress-corrosion cracks in the main gas pipeline from the measured signal of the overhead eddy-current transducer, a mathematical recognition method based on the regularization method is proposed. Analytical expressions are obtained for the smoothing function and the optimal regularization parameter, which makes it possible to obtain stable estimates of the depth of stress-corrosion cracks in the main gas pipeline. In the absence of spatial resolution of a group of stress-corrosion cracks based on the signal of an overhead eddy-current transducer, a mathematical model of a group of cracks with the same depths and a constant interval is proposed. The procedure for determining the values of the parameters used in the regularization parameter of the smoothing functional is described. Based on the analysis of eddy-current transducer signals by the regularization method obtained on artificial models of stress-corrosion cracks in the main gas pipeline, it is shown that the average relative error in estimating the depth of a group of identical cracks does not exceed 8.5 %. It is shown that the estimate of the depth of a continuity defect obtained by recognizing a group of unequal cracks is close to the average value of this parameter established for a group of cracks, while the average relative error in estimating the average depth of a group of unequal cracks does not exceed 8 %.

Keywords: main gas pipeline, metal continuity defect, a group of stress corrosion cracks, crack depth, crack spacing, signal of an eddy-current transducer, mathematical model of the signal.

+ - About the Authors Click to collapse

R.V. Zagidulin (FSBEI HE USPTU, Ufa, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
A. T. Bakiev (Engineering and technical center LLC «Gazprom Transgaz Ufa», Ufa, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Alimov S. V., Arabey A. B., Ryahovskih I. V. et al. (2015). The concept of diagnosing and repairing main gas pipelines in regions with a high predisposition to stress corrosion. Gazovaya promyshlennost', 724, special issue, 10 – 15. [in Russian language]
2. Moskovkina V. N., Zagidulin R. V. (2020). The Statistic Analyze of Stress-Corrosion Cracks on the Main Gas Pipeline Section. IOP Conference Series: Earth and Environmental Science. International Science and Technology Conference “EarthScience”.
3. Zagidulin R. V., Zagidulin T. R., Bakiev T. A., Bakiev A. T. (2021). The Study of Eddy Current Sensors Signals over a Group of Cracks in Metal. IOP Conference Series: Earth and Environmental Science. International Science and Technology Conference “EarthScience”
4. Muzhitskiy V. F., Karabchevskiy V. A., Karpov S. V. (2004). Search and assessment of SCC defects on main gas pipelines using eddy current and other non-destructive testing means during operation and repair. Territoriya neftegaz, (11), 28 – 35. [in Russian language]
5. Muzhitskiy V. F., Karabchevskiy V. A., Karpov S. V. (2005). Ten years of experience in examining stress-corrosion and other surface defects in main gas pipelines. Defektoskopiya, (4), 25 – 33. [in Russian language]
6. Muzhitskiy V. F., Bakunov A. S., Shubochkin A. E., Zagidulin R. V. (2008). Features of eddy current flaw detection of main pipelines. 7th International Conference “Non-destructive testing and technical diagnostics in industry”, 34 – 36. Moscow. [in Russian language]
7. Shubochkin A. E., Efimov A. G. (2011). Experience in operating the VD-90NP eddy current flaw detector for non-destructive testing during major repairs of main gas pipelines. 19th All-Russian Scientific and Technical Conference on Non-Destructive Testing and Technical Diagnostics, 152 – 153. Samara. [in Russian language]
8. Konnov A. V., Kuznetsov A. M., Zagidulin T. R., Zagidulin R. V. (2013). Electromagnetic control of the surface of steel gas pipelines during the process of re-insulation. International scientific and technical conference "Achievements in the physics of non-destructive testing", 182 – 189. Minsk. [in Russian language]
9. Instructions for classifying stress-corrosion defects according to their degree of danger. (2001). Departmental Guidance Document No. VRD 39-1.10-032–2001. Moscow: IRTs Gazprom. [in Russian language]
10. Klyuev V. V. (Ed.), Sosnin F. R., Filinov V. N. et al. (1995). Non-destructive testing and diagnostics: handbook. Moscow: Mashinostroenie. [in Russian language]
11. Bakiev A. T., Zagidulin R. V., Bakiev T. A. (2021). Recognition of a group of stress-corrosion cracks in metal using a signal from an attached absolute eddy current transducer. [in Russian language]
12. Zagidulin R. V., Bakiev A. T., Bakiev T. A. (2022). An empirical method for recognizing a group of stress-corrosion cracks in metal using a signal from an attached eddy current transducer. Izvestiya Tomskogo politekhnicheskogo universiteta. Inzhiniring georesursov, 333(11), 149 – 159. [in Russian language]
13. Zagidulin R. V., Bakiev T. A., Bakiev A. T. (2022). To the recognition of stress-corrosion cracks in metal based on the signal of eddy current transducers. Kontrol'. Diagnostika, 25(2), 24 – 333. [in Russian language] DOI: 10.14489/td.2022.02.pp.024-033
14. Arsenin V. Ya. (1974). Methods of mathematical physics and special functions. Moscow: Nauka. [in Russian language]
15. Gorelik A. L., Skripkin V. A. (1989). Recognition methods. Moscow: Vysshaya shkola. [in Russian language]
16. Zagidulin R. V., Zagidulin T. R., Konnov V. V. (2015). Remote magnetometric control of steel pipeline. Part 2. Kontrol'. Diagnostika, (2), 13 – 24. [in Russian language] DOI: 10.14489/td.2015.02.pp.013-024
17. Zagidulin R. V., Bakiev A. T. (2019). Modeling the signal of an eddy current transducer over stress-corrosion cracks in a main gas pipeline. Modern problems of physics: interuniversity collection of scientific articles dedicated to the 100th anniversary of the opening of the Ufa Physical Institute, 99 – 102. Ufa: RITs BashGU. [in Russian language]
18. Zagidulin R. V., Zagidulin T. R., Bakiev T. A., Bakiev A. T. (2021). Models of Signals of Eddy-Current Transducers above Defects of the Continuity of Metal. IOP Conference Series: Earth and Environmental Science. International Science and Technology Conference “EarthScience”.
19. Non-destructive eddy current testing. Terms and Definitions. (2019). Ru Standard No. GOST R 55611–2013. Moscow: Standartinform. [in Russian language]
20. Fedosenko Yu. K., Shkatov P. N., Efimov A. G. (2011). Eddy current testing. Moscow: ID «Spektr». [in Russian language]

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