Performance characteristics of electrically-insulating joints by results of bench testing

Authors: R.M. Gareev (Tatneft OAO, RF, Almrtyevsk), A.R. Rakhmanov, I.A. Sharipov (Oil and Gas Production Department Almetyevneft, RF, Almetyevsk), F.Sh. Shakirov, A.A. Fatkhullin (TatNIPIneft, RF, Bugulma), V.E. Tkacheva (Kazan National Technical University, RF, Kazan)

Key words: internal corrosion, galvanic anode protection, pipeline, electrically-insulating joints.

The paper presents performance characteristics of electrically-insulating joints in the cathodic protection systems of pipelines based on the results of bench testing. It has been offered to use efficiency coefficient of electrically-insulating properties characterizing the amount of protective current that remains once electrically-insulating joints have been installed as the main characteristic of an electrically-insulating joint. It has been shown that the more reliable protection of the pipeline, the more stray current flows through the electrically-insulating joint, i.e. the same electrically-insulating structure would be characterized by different efficiency coefficients (resistance to corrosion) in different cathodic protection systems.


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