Algorithm for Calculating Reliability of Single Linear Section of Steel Underground Pipeline

One of the most widespread technical systems in the world is underground steel pipeline communications (heat pipelines, main and distribution oil and gas pipelines, etc.). Accordingly, reliability assessment of such technical systems and their components is of great theoretical and practical interest. At the modern level of development, reliability calculation has become a mandatory stage in the design and diagnostics (during operation) of any technical systems in ge-neral, and in particular pipeline systems. A reliable calculation, either explicitly or implicitly,  is always based on the model of the object being calculated. It is the adequacy of the model to the real physical relations and processes inside the technical object that determines the accuracy and practical value of calculation methods. It is proposed to consider a single linear section of an underground steel pipeline as a complex technical system of unequal elements from the point of view of reliability – the main element (steel pipe) and auxiliary  protective elements combined into subsystems (blocks). The algorithm for calculating  the reliability of the object is based on the method of  block diagrams, taking into account the influence of the aftereffect  of the failure of an auxiliary element (elements) on the reliability parameters of the main element, which more adequately reflects the specific features of the design and operation of steel pipelines compared with the applied static models. The variants of structural design of a steel underground gas pipeline with a protective insulation coating and with complex corrosion protection (insulation and electrochemical protection) are considered, for which refined formulas are obtained for calculating the main reliability (failure-free) indicators.

1. Tsvetkov V. Ya. (2017) Complex technical systems. Obrazovatelnye Resursy i Tekhnologii = Educational Resources and Technologies, (3), 86–92 (in Russian).

2. Rozanov B. G. (1989) Living cover of the Earth. Moscow, Pedagogika Publ. 128 (in Russian).

3. Hurd, W., Retterer, B. L., Meister, D., Marshik, J. A., Lancaster, Y., McClure, J., Knight, L. J. (1970) Reliability Handbook. Vol. 3. Moscow, Mir Publ. 376 (in Russian).

4. Zinevich A. M. (1984) Scientific and technical support for the reliability of the construction of the linear part of main pipelines. Moscow, Informneftegazstroy Publ. 132 (in Russian).

5. Kats L., Linkovsky Zh. (1970) Some issues in studying the reliability of VNIIEgazprom Moscow, Express-Informatsiya Publ., (23), 15–28 (in Russian).

6. Kharionovsky V. V., Rodin V. P. (1993) Issues of reliability and survivability of main pipelines as linear systems. Voprosy nadezhnosti gazoprovodnykh konstruktsii: sb. nauchnykh trudov [Issues of reliability of gas pipeline structures: Collection of Scientific Papers]. Moscow, All-Union Scientific Research Institute of Natural Gases. 125 (in Russian).

7. Rudachenko A. V., Baykin S. S. (2008) Operational reliability of pipeline systems. Tomsk: Publishing House of Tomsk Polytechnic University. 118 (in Russian).

8. Deyneko S. V. (2011) Ensuring the reliability of oil and gas pipeline transport systems. Moscow, Tekhnika Publ. 176 (in Russian).

9. State Standard 27.002-2015. Reliability in technology. Terms and definitions. Moscow, Standartinform Publ., 2016. 23 (in Russian).

10. Mikhaylov M. I. (2022) Reliability and diagnostics of technological systems. Minsk, Republican Institute for Higher Education. 360 (in Russian).

11. Deryushev L. G., Pham Ha Hai (2014) Standardization of reliability requirements for water supply systems in Vietnam. Vestnik MGSU, (9), 7–21 (in Russian).

12. State Standard 27.301-95. Reliability in technology. Reliability calculation. Basic provisions. Minsk, 1995. 10 (in Russian).

13. State Standard Р 51901.14-2007. Risk management. Reliability block diagram and Boolean methods. Moscow, Standartinform Publ., 2008. 23 (in Russian).

14. Belyaev Yu. K., Bogatyrev V. A., Bolotin V. V. (1985) Reliability of technical systems. Moscow, Radio I Svyaz Publ. 608 (in Russian).

15. Viktorova V. S., Stepanyants A. S. (2014) Models and methods for calculating the reliability of technical systems. Moscow, LENAND Publ. 256 (in Russian).

16. Algin V. B. (2011) Calculation of real machine reliability. Resource mechanics approaches. Mekhanika Mashin, Mekhanizmov i Materialov = Mechanics of Machines, Mechanisms and Materials, (1), 10–20 (in Russian).

17. Barzilovich E. Yu., Belyaev Yu. K., Kashtanov V. A., Kovalenko I. N., Solov'ev A. D., Ushakov I. A. (1983) Questions of mathematical theory of reliability. Moscow, Radio I Svyaz Publ. 376 (in Russian).

18. Polovko А. М., Gurov S. V. (2006) Fundamentals of reliability theory. 2nd Ed. Saint Petersburg, BKhV-Peterburg Publ. 704 (in Russian).

19. Gurov S. V., Utkin L. V. (2017) Reliability of recoverable redundant systems with after-effects failures. Automation and Remote Control, 78, 113–124. https://doi.org/10.1134/S000511791701009X

20. Zhadnov V. V., Polessky S. N. (2006) Determination of reliability indicators for systems with auxiliary elements. Proektirovanie telekommunikatsionnykh i informatsi-onnykh sredstv i sistem: sb. nauch. tr. [Design of Te-lecommunication and Information Means and Systems. Collection of Scientific Papers] Moscow, Moscow Institute of Electronic and Mathematics, 151–158 (in Russian).

21. State Standard 9.602-2016. Unified system of protection against corrosion and aging. Underground structures. General requirements for corrosion protection. Moscow, Standartinform Publ., 2016. 87 (in Russian).

22. State Standard Р 51164-98. Main steel pipelines. General requirements for corrosion protection. Moscow, Gosstandart of Russia, 1998.