Application of the combined scheme of cathodic protection of long-term maintained underground gas pipelines

Issue 4(54) 2009
Pages 23-26
Aginey R.V., Kuz’bozhev A.S., Severinova L.N., Shishkin I.V.

At long-term operation of underground pipelines there is a decrease of transition resistance of a coating that results in the change of modes of operation of cathodic protection. On separate sites, the pipe metal protection criteria have not been provided. In work application of the combined circuit of protection which provides installation of the allocated anodes is offered. The circuit of the device for regulation of “pipe - ground” potential is offered.