E. L. Karnavsky - JSC «Giprogascentе». E-mail: ekarnavsky@ggc.nnov.ru
V. G. Baranov - Ph.D. (Eng.), Professor, Nizhniy Novgorod State Technical University n.a. R.E. Alekseev. E-mail: irit@nntu.nnov.ru
S. A. Nikulin - Engineer, JSC «Giprogascentе». E-mail: s.nikulin.ggc@gmail.com
V. R. Milov - Dr.Sc. (Eng.), Professor, Head of Department «Electronics and Computer Networks», Nizhniy Novgorod State Technical University n.a. R.E. Alekseev. E-mail: vladimir.milov@gmail.com

To ensure trouble-free operation of trunk pipelines for the claimed life of the applicable series of measures the prevention of corrosion damage is required. Insulating coatings provide primary, passive protection of pipelines against corrosion. Also, gas mains are protected by means of electrochemical protection (cathodic polarization). Electrochemical protection is provided by cathodic protection stations. The basis of electrochemical protection is to shift the potential of the metal pipe towards the negative direction. Measurement of the protective potential of the pipeline route is carried out at the control points. It is necessary to maintain the protective potential within certain limits. The values depend on the potential protective factors: the temperature of the transportable product; resistivity of the soil; the influence of stray currents; pipeline material. System of remote corrosion monitoring allows us to monitor the state of the protected object in extent and time. In the design of the main gas pipelines the scheme of automated control and security management must be implemented. The circuit includes means for collecting information by means of remote control or available means of communication. In the information management system (IMS) corrosion protection the following levels exist: 1) The level of control of cathodic protection stations. 2) The level of linear production departments. It provides automated determination of ECP modes means. Making decisions on the application of accounting regimes made service engineer corrosion protection. 3) Improved management at the top level of gas transport enterprises. It is achieved through the introduction of intelligent decision support system for the chief of department of corrosion protection. The research problem is to develop the principles of functioning of the system allowing us to evaluate the influence of the factors and make a ranking of sites on the degree of hazard, based on the database. Also, based on the database of the situation and the measures taken by the specialists of corrosion protection services, the possibility of the application of expert decision support system, helps professionals identify the problem in the WPF. Thus, the proposed two-tier system to rank sites in order of importance of decision-making for maintenance and repair gives the possibility, to identify the causes of problematic situations, offers a specialist service of corrosion protection are proposes, the possible ways to address them.