Some problems of designing cathodic protection of gas-distributing city systems

The paper represents a general and comparative (for particular examples) cr itical analyses of designing the cathodic protection for branched gas-distr ibution city systems, proceeding from an average protection current density , its experimental values, or the equations for the linear pipe sections. T he limitations of such approaches are revealed, yet the protection current values thus rated can reasonably be used for estimating the current leakage from a gas-distribution system to extraneous underground structures.