10.14489/td.2024.06.pp.040-050

2024, 06 June

DOI: 10.14489/td.2024.06.pp.040-050

Zagidulin R. V., Bakiev A. T., Lyapustin K. V.
THE INFLUENCE OF SURFACE EDDY CURRENT PROBE SIGNAL SMOOTHING ON ASSESSING STRESS-CORROSION CRACKS DEPTH IN MAIN GAS PIPELINE
(pp. 40-50)

Abstract. The paper presents the results on the influence of signals smoothing of absolute and differential surface eddy current probes (ECP) above an individual crack and a group of stress-corrosion cracks on the accuracy of estimating the depths of stress-corrosion cracks during eddy current flaw detection of a main gas pipeline (MGP). Mathematical models demonstrate that the degree of signal smoothing of the surface ECP over an individual crack is higher than the degree of smoothing of the ECP signal over a group of stress-corrosion cracks in the MGP. Smoothing results in a decreased resolution of the surface ECP signal. The differential surface ECP is characterized by a higher resolution than the similar absolute surface ECP. The study demonstrates the reduction in amplitude difference between the actual signals of the absolute surface ECP over an individual crack and a group of stress-corrosion cracks, compared to the smoothed signal of the surface ECP. In the estimates of depths in the group of stress-corrosion cracks in MGP, obtained from the amplitude of the actual signal of the absolute surface ECP, where smoothing of the ECP signal is excluded, a significant reduction in the relative error is observed.

Keywords: main gas pipeline, a group of stress-corrosion cracks, stress corrosion crack depth, eddy current flaw detector, eddy current probe, signal amplitude, signal smoothing.

+ - 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, K. V. Lyapustin (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. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Main gas pipelines. Diagnostic examination. Stress-corrosion defects of pipes. (2021). Methodology for assessing R Gazprom 2-2.3-1251‒2021. Saint Petersburg. [in Russian language]
2. Bizyulev A. N., Karabchevskiy V. A., Muzhitskiy V. F., Karpov S. V. (2002). Application of eddy current methods for detecting stress corrosion during the inspection of main gas pipelines in 2000 – 2001. Kontrol'. Diagnostika, (12), 27 ‒ 30. [in Russian language]
3. 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]
4. 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]
5. Fedosenko Yu. K., Shkatov P. N., Efimov A. G. (2011). Eddy current testing: textbook. Moscow: ID «Spektr». (Diagnostika bezopasnosti). [in Russian language]
6. Bizyulev A. N., Muzhitskiy V. F., Zagidulin R. V. (2001). On the influence of the finite dimensions of the transducer on the measurement of the magnetic field of a surface defect. Kontrol'. Diagnostika, (10), 8 ‒ 11. [in Russian language]
7. 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», 459(4).
8. 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», 460(4).
9. 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), 22 ‒ 31. [in Russian language] DOI: 10.14489/td.2022.02.pp.024-033
10. 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]
11. 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», 460(4).
12. Zagidulin R. V., Bakiev A. T. (2023). Determination of the parameters of stress-corrosion cracks of the main gas pipeline based on the results of eddy current control. Kontrol'. Diagnostika, (12), 24 ‒ 34. [in Russian language] DOI: 10.14489/td.2023.12.pp.024-034

+ - Purchase digital version of a single article Click to collapse

This article is available in electronic format (PDF).

The cost of a single article is 500 rubles. (including VAT 20%). After you place an order within a few days, you will receive following documents to your specified e-mail: account on payment and receipt to pay in the bank.

After depositing your payment on our bank account we send you file of the article by e-mail.

To order articles please copy the article doi:

10.14489/td.2024.06.pp.040-050

and fill out the form