2020 №06 (02) DOI of Article
2020 №06 (04)

Automatic Welding 2020 #06
Avtomaticheskaya Svarka (Automatic Welding), #6, 2020, pp. 17-22

Structural condition and fatigue damageability of welded joints of steam pipelines

V.V. Dmitrik, A.K. Tsaryuk, O.S. Garashchenko, T.O. Sirenko

National Technical University «Kharkiv Polytechnic Institute», 2, Kirpichova Str., 61002, Kharkiv, Ukraine. E-mail: garaslichenko.helena@gmail.com

At present time, a number of HPP power units having operated about 250,000 h. in a relatively stationary operating condition, changed to a maneuver mode. This transition caused a need in the studying damageability of their equipment according to the mechanism of fatigue and, above all, welded joints of steam pipelines of heat-resistant steels, operating under the conditions of creep. A further increase in fatigue damageability causes an increase in the requirements to the initial structure of both the welded joints being produced as well as the parts to be repaired using welding. 14 Ref., 12 Fig.
Keywords: metal damageability; welded joints; fatigue cracks; structural condition; conditions of creep, dislocations

Received: 11.03.2020


1. Dimić, I., Arsić, M., Medjo, B. et al. (2013) Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure. Technical Gazette, 20, 2, 285–290.
2. Lazić, V., Aleksandrović, S., Arsić, D. et al. (2016) The influence of temperature on mechanical properties of the base material and welded joint made of steel S690QL. Metalurgija, 55, 2, 213–216.
3. Katavić, B, Jegdić, B. (2007) Analysis of damages on water boiler shield pipes. Welding and welded structures, 4, 123–130.
4. Khromchenko, F.A. (2002) Residual life of welded joints of steam pipelines. Moscow, Mashinostroenie [in Russian].
5. Trukhnij, A.D., Korzh, D.D., Kochetov, A.A., Rezinskikh, V.F. (1986) Investigation of low-cycle fatigue of steels 34KhM1A and EI415 after long-time operation in steam turbines. Teploenergetika, 3, 32–35 [in Russian].
6. Dityashev, B.D., Popov, A.B. (2007) Complex approach to determination of residual life of steam pipelines of thermal power stations. Ibid., 2, 21-25 [in Russian]. https://doi.org/10.1134/S004060150702005X
7. Dmitrik, V.V., Baumer, V.N. (2007) Carbide phases and damageability of welded joints at long-time operation. Metallofizika. Novejshie Tekhnologii, 2(7), 937-947 [in Russian].
8. Glushko, A.V., Dmitrik, V.V., Sirenko, T.A. (2018) Creep of welded joints of steam pipelines. Ibid., 40(5), 683-700 [in Russian].
9. Lazić, V., Arsić, D., Nikolić et al. (2016) Selection and analysis of material for boiler pipes in a steam plant. Procedia Engineering, 149, 216-223. doi:10.1016/j.proeng.2016.06.659. https://doi.org/10.1016/j.proeng.2016.06.659
10. Ivanova, V.S. (1979) Fracture of metals. Moscow, Mashinostroenie [in Russian].
11. (2003) RD 10-577-03. Model guidelines for inspection of metal and prolongation of the service life of main components of boilers, turbines, and piping systems of thermal power stations. Moscow, NPO Prombezopasnost [in Russian].
12. (1987) МU 34-70-161-87. Guidelines on metallographic analysis and examination of damage causes of steam pipeline welded joints from steels 12Kh1MF and 15Kh1M1F of thermal power stations. Moscow, VTI [in Russian].
13. Dmitrik,V.V., Glushko ,A.V., Tsaryk, A.K. (2019) Rekrystallization in the metal of welding joints of steam trucks. Problems of atomic science and technology, 5 (123), 49–52.
14. Dmitrik, V.V., Sirenko,T.A. (2012) To the mechanism of diffusion of chromium and molybdenum in the metal of welded joints of steam pipelines. The Paton Welding J., 10, 20-24.

Advertising in this issue: