First Interim Report of Technical Unit Committee T-4B On Corrosion of Cable Sheaths. Pipe-Type Cable Corrosion Protection Practices In the Utilities Industry: Compiled by Task Group T-4B-4 on Protection of Pipe-Type Cables^*

Data received in reply to a questionnaire is compiled on the actual field practices of utilities operating pipe-type cables. The data cover more than 90 percent of this type of cable in operation at the time the survey was made. The prinicpal data are tabulated, giving reports by seventeen operators on field practices. The subjects covered include size and kind of pipe, coating materials, holiday testing, potential surveys, cathodic protection, coating resistance measurements, rates of coating resistance depreciation, bonding, stray current measurements, shunts, surveys, voltages and magnitudes of cathodic protection currents and other information.