Device and Methods for Measuring of Acoustic Anisotropy and the Residual Stress in the Main Gas Pipelines’ Metal
https://doi.org/10.21122/2220-9506-2019-10-1-42-52
Abstract
One of the main conditions of safe operation of gas pipelines is the use of non-destructive diagnostic methods. Particularly important problem is the earlier operational diagnosis of pipes’ material of main gas pipelines based on the evaluation of the stress-strain state, elastic moduli and properties anisotropy by acoustic methods. The aim of the work is to develop methods for acoustic assessment of the stress-strain state, the elastic moduli and the properties anisotropy of pipeline material and to study these characteristics in different sections of main pipelines using a device based on contactless EMA transducers.
Methods are implemented using specialized equipment (the structurescope SEMA) and non-contact electromagnetic acoustic transducers. As an object of research, we used fragments – the cuttings of gas pipelines with circumferential welds both after fabrication and removed from service with stress corrosion cracking, including ones with corrosion damage and without visible damage.
The method of determining the plane stress-strain state of pipeline elements is based on the phenomenon of acoustoelasticity – the dependence of the propagation velocity of ultrasonic waves on mechanical stresses. The method for determining the elastic characteristics of materials and the anisotropy of their properties is based on the relationship between the velocities of ultrasonic waves and the elastic properties of the medium. Both techniques are implemented by sounding the sample in one section using a longitudinal wave and two shear waves with mutually perpendicular polarization planes coinciding with the main stresses, and measuring their propagation times.
It is shown that the stress state distribution both in the circumferential direction and along the generatrix is uneven which is caused by the peculiarities of samples (presence of a welded joint, stress corrosion cracking, long-term operation). The smallest acoustic anisotropy is observed for the Young's modulus. The anisotropy of the properties of most samples is in the range of 12–14 % for shear modulus, 9–10 % for Young’s modulus, 13–15 % for Poisson’s ratio. For samples with stress corrosion cracking a sharp decrease in the anisotropy coefficient is observed which makes it possible to use the indicated characteristics as informative parameters in detecting stress corrosion cracking.
A feature of the proposed methods is high accuracy, due to the absence of necessity to determine the material density and precision measurement of its thickness, the measurement error of which is significant by known methods.
Keywords: main gas pipeline, elastic moduli, acoustic anisotropy of properties, the biaxial stress-strain state, longitudinal and transversal waves.
Keywords
About the Authors
L. V. VolkovaRussian Federation
Address for correspondence: L.V. Volkova – Kalashnikov Izhevsk State Technical University, Studencheskaya str., 7, Izhevsk 426069, Russia. e-mail: ludmila396@rambler.ru
O. V. Murav’eva
Russian Federation
Studencheskaya str., 7, Izhevsk 426069; Tatiana Baramzinoy str., 34, Izhevsk 426067
V. V. Murav’ev
Russian Federation
Studencheskaya str., 7, Izhevsk 426069; Tatiana Baramzinoy str., 34, Izhevsk 426067
I. V. Buldakova
Russian Federation
Studencheskaya str., 7, Izhevsk 426069
References
1. Melehin O.N., Vjalyh I.L., Lazarev V.L., Zotov D.А., Remizov A.E., Lipovik А.V., Dejneko S.V. [Major gas pipeline automated nonintrusive testing practices using external flaw locator scanners]. Gazovaja promyshlennost' [Gas Industry], 2015, no. S2(724), pp. 44–48 (in Russian).
2. Matvienko A.F., Loskutov V.E., Babkin S.A., Korzunin G.S. The quality control of underground gas pipelines via the electromagnetic and acoustic method. Russian Journal of Nondestructive Testing, 2015, Vol. 51, no. 9, pp. 546–553. DOI: 10.1134/S1061830915090077
3. Duan W., Kanfoud J., Deere M., Mudge P., Gan T.-H. Spectral subtraction and enhancement for torsional waves propagating in coated pipes. NDT & E International, 2018, vol. 100, pp. 55–63. DOI: 10.1016/j.ndteint.2018.08.009
4. Murav’eva O.V., Murashov S.A., Len’kov S.V. Torsional waves excited by electromagnetic-acoustic transducers during guided-wave acoustic inspection of pipelines. Acoustical Physics, 2016, vol. 62, no 1, pp. 117–124. DOI: 10.7868/S032079191506009X
5. Davydov V.V., Myazin N.S., Logunov S.E., Fadeenko V.B. A contactless method for testing inner walls of pipelines. Russian Journal of Nondestructive Testing, 2018, vol. 54, no. 3, pp. 213–221. DOI: 10.1134/S1061830918030051
6. Hyung M.K., Doo-Hyun C. Defects detection of gas pipeline near the welds based on self quotient image and discrete cosine transform. Russian Journal of Nondestructive Testing, 2016, vol. 52, no. 3, pp. 175–183. DOI: 10.1134/S1061830916030049
7. Krasnov A.N. [Forecasting dynamic loads in gas pipelines based on identification methods]. Intellektual'nye sistemy v proizvodstve [Intellectual Systems in Manufacturing], 2017, vol. 15, no. 4, pp. 83–88 (in Russian).
8. Tymchik G.S., Podolian A.A. [Monitoring system data processing algorithm of weld-bonded coupling installation of the main pipelines]. Pribory i metody izmerenij [Devices and Methods of Measurements], 2014, vol. 8, no. 1, pp. 63–67 (in Russian).
9. Basiev K.D., Dzioev K.M., Alborov A.D., Dzutsev T.M. [Influence of elastic strain energy of compressed gas on the development of corrosion and mechanical-corrosion cracks in the main gas pipelines]. Gazovaja promyshlennost' [GAS Industry of Russia], 2018, no. 7(771), pp. 96–100 (in Russian).
10. Gonchar A.V., Mishakin V.V., Klyushnikov V.A., Kurashkin K.V. Variation of elastic characteristics of metastable austenite steel under cycling straining. Technical Physics. The Russian Journal of Applied Physics, 2017, vol. 62, no. 4, pp. 537–541. DOI: 10.1134/S1063784217040089
11. Mishakin V.V., Klyushnikov V.A., Gonchar A.V. Relation between the deformation energy and the Poisson ratio during cyclic loading of austenitic steel. Technical Physics. The Russian Journal of Applied Physics, 2015, vol. 60, no. 5, pp. 665–668. DOI: 10.1134/S1063784215050163
12. Mishakin V.V., Serebryany V.N., Gonchar A.V., Klyushnikov V.A. [Acoustic study of the texture characteristics of 15YuTA construction steel in fatigue failure conditions]. Zavodskaja laboratorija. Diagnostika materialov [Industrial Laboratory], 2018, vol. 84, no. 7, pp. 30–34 (in Russian). DOI: 10.26896/1028-6861-2018-84-7-30-34
13. Murav’eva O.V., Murav’ev V.V. Methodological peculiarities of using shand Lamb waves when assessing the anisotropy of properties of flats. Russian Journal of Nondestructive Testing, 2016, vol. 52, no. 7, pp. 363–369. DOI: 10.1134/S1061830916070056
14. Matyuk V.F., Burak V.A. [Quality testing of heat treatment of medium-carbon steel construction items based on the bipolar pulsed remagnetization]. Pribory i metody izmerenij [Devices and Methods of Measurements], 2014, vol. 8, no. 1, pp. 57–62 (in Russian).
15. Filinov V.V., Kuznetsov A.N., Arakelov P.G. Monitoring stressed state of pipelines by magnetic parameters of metal. Russian Journal of Nondestructive Testing, 2017, vol. 53, no. 1, pp. 51–61. DOI: 10.1134/S1061830917010065
16. Uglov A.L., Khlybov A.A. On the inspection of the stressed state of anisotropic steel pipelines using the acoustoelasticity method. Russian Journal of Nondestructive Testing, 2015, vol. 51, no. 4, pp. 210–216. DOI: 10.1134/S1061830915040087
17. Smirnov A.N., Knyazkov V.L., Abakov N.V., Ozhiganov E.A., Koneva N.A., Popova N.A. Acoustic evaluation of the stress-strained state of welded carbon steel joints after different modes of heat input. Russian Journal of Nondestructive Testing, 2018, vol. 54, no. 1, pp. 37–43. DOI: 10.1134/S1061830918010072
18. Murav’ev V.V., Volkova L.V., Platunov A.V., Buldakova I.V., Gushchina L.V. [Investigations of the structural and strain-stress state of the rails of current production by the acoustic elasticity method]. Vestnik IzhGTU im. M.T. Kalashnikova [Bulletin of Kalashnikov ISTU], 2018, vol. 21, no. 2, pp. 13–23 (in Russian). DOI: 10.22213/2413-1172-2018-2-13-23
19. Babkin S.E. The determination of the Poisson ratio for ferromagnetic materials using the EMA method. Russian Journal of Nondestructive Testing, 2015, vol. 51, no. 5, pp. 303–307. DOI: 10.1134/S1061830915050022
20. Murav’ev V.V., Murav’eva O.V., Volkova L.V. Influence of the mechanical anisotropy of thin steel sheets on the parameters of lamb waves. Steel in Translation, 2016, vol. 46, no. 10, pp. 752–756. DOI: 10.3103/S0967091216100077
21. Strizhak V.A., Pryakhin A.V., Obukhov S.A., Efremov A.B. [The information and measuring system for excitation, detection, registration and processing of signals from electromagnetic-acoustic transducers]. Intellektual'nye sistemy v proizvodstve [Intellectual Systems in Manufacturing], 2011, no. 1(17), pp. 243–250 (in Russian).
22. Nikitina N.E., Kamyshev A.V., Kazachek S.V. Application of the acoustoelasticity phenomenon in studying stress states in technological pipelines. Russian Journal of Nondestructive Testing, 2009, vol. 45, no. 12, pp. 861–866. DOI: 10.1134/S1061830909120043
Review
For citations:
Volkova L.V., Murav’eva O.V., Murav’ev V.V., Buldakova I.V. Device and Methods for Measuring of Acoustic Anisotropy and the Residual Stress in the Main Gas Pipelines’ Metal. Devices and Methods of Measurements. 2019;10(1):42-52. (In Russ.) https://doi.org/10.21122/2220-9506-2019-10-1-42-52