Improving the safety of main oil pipelines based on optimization of electrochemical protection parameters

Cathodic protection of main oil pipeline

“…In addition, the efficiency of electrochemical protection systems (ECPS) is reduced due to the fact that the cathodic protection stations are controlled in most cases by maintaining the specified operating parameters without adapting them to changing load conditions [20][21][22][23]. Under such conditions, it is difficult to establish optimal output modes of cathodic protection plants (CPU), which would provide reliable metal protection throughout the main oil pipeline, taking into account external factors that vary over time (soil resistivity, operation modes of adjacent cathodic protection stations, the presence of wandering currents, DC and AC density, temperature) [24][25][26][27][28].…”

Prediction of transient processes in oil pipelines with the purpose of emergency incident prevention

“…Operation experience of main oil pipelines has shown that in spite of significant development in design, construction and operation of main oil pipeline structures it is impossible to de finitively solve the problem of accidental losses of oil during its transportation occurring when the line as well as technological equipment is depressurized. That happens under individual or simultaneous influence of several of the following factors [3,4]: no or incomplete adherence to specifications at metal rolling enterprises in the process of pipe manufacturing; mistakes made at the stages of oil pipeline design and construction;…”

“…In addition, corrosion can occur with the simultaneous action of the corrosive medium and mechanical stresses in the metal. Corrosive processes in pipelines occur under the influence of ground, stray currents and alternating current of electrified transport [3].…”

“…unsolved aspects of the problems. The analysis of research results concerning causes of main oil pipelines failure [3,11] shows that the share of refusals occurred due to neglecting the rules of technical operation of main oil pipelines ranges from 2 to 7 %. These include refusals due to the personnel's faults in observing the safety rules and wrong management decisions that lead to violation of terms and quality of maintenance and repair.…”