A report on 10-years’ operating experience with rectifiers for cathodic protection of a 10-inch crude oil pipe line in the Texas-Gulf Coast area. This paper describes design of the system, including a 2300 volt overhead distribution line which was constructed parallel and adjacent to the pipe line, performance data on rectifiers which are placed three per mile of pipe line protected, experience with ground beds, current requirements to maintain protection, bonding procedures with parallel and/or crossing foreign structures, and leak frequency.

An economic study is made of the system based upon investment charges, operating and maintenance costs, and actual power costs.

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