Vol. 7 № 2, 2017 p 82-86

Pages

Article name, authors, abstract and keyword

82-86

Experience in designing of corrosion protection of underground pipelines at ORS sites

Andrey A. Prokhorov a, Valery V. Radchenko a, Ruslan A. Zhukov a

a Caspian Pipeline Consortium (CPC), JSC, 40, building 4, B. Ordynka Str., Moscow, 119017, Russian Federation

https://doi.org/10.28999/2541-9595-2017-7-2-82-86

Abstract: The article presents the experience in designing of electrochemical corrosion protection (ECCP) at the sites of oil refining stations (ORS) of the Caspian Pipeline Consortium-R (CPC-R), JSC. It is noted that the method that is adopted in Russia for calculation of the protective current in accordance with the minimum current density does not take into account its part that branches off into other grounded metal structures on the site, shielding of the protective current by the grounding system at the ORS, and material of the grounding conductors. This, in its turn, leads to an underestimated value of the design current and, as a result, to insufficient protection of the industrial and auxiliary pipelines at the ORS.
It is concluded that there is a necessity to revise the methods for calculation of the protective current on the ORS sites, clarification of the calculation methods for calculating the soil conductivity at the site with the help of the VES method, as well as the methods for development of recommendations for the joint use of the distributed and concentrated anode groundings and extended EP on the sites.

Keywords: protective current, polarization potential, cathodic protection station, specific conductivity of soil

References:
[1] RD-91.020.00-KTN-234-10. Design standards for electrochemical protection of main pipelines and ORS structures (2010).
[2] GOST R 51164-98. Steel main pipelines. General requirements for protection against corrosion (1998).
[3] Tkachenko V. N. Electrochemical protection of pipeline networks: a textbook. 2nd ed., rev. and ext. Moscow (Russian Federation): Stroyizdat; 2004.
[4] Order of the Ministry of Energy of Russia dated 08.07.2002 No. 204. Rules for electrical installations, 7th edition.
[5] Standard SAES-X-600. Cathodic protection of equipment (2009).
[6] Teletyen I. G., Patryshev N. Y. Features of the electrochemical protection system construction in the presence of grounded structures. Corrosion. Territories of oil and gas. 2014;3:76–77.
[7] Korotyaev A.G. Influence of protective grounding contours on the level of protection and resource of the ectrochemical protection system of site facilities. Corrosion. Territories of oil and gas. 2016;3(35):60-62.
[8] RD 153-39.4-091-01. Instructions for the protection of urban underground pipelines against corrosion (2001).

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