Recommended Practice For ECDA Exhibits Some Confusion

摘要

When pipeline operators set out to choose cathodic protection and coating fault survey tools under the guidance of NACE ECDA RP 0502-2002, they need to be aware that there are some weaknesses and limitations in the recommended practice with respect to its lack of firm emphasis that the data be fault specific and closely correlated with distance for computerized analysis. In its ECDA tool selection matrix, the RP 0502-2002 illustrates confusion as it considers six CP/Coating Survey Methods — Close Interval Survey, DCVG, ACVG, Pearson, Electromagnetic and AC Current Attenuation — and presents a distorted view of the practical application of the methods.