Sample pipe for verifying testing capability of erosion resistant layer detector, and verifying method

The invention discloses a sample pipe for verifying the testing capability of an erosion resistant layer detector, and a verifying method. A pipeline comprises a metal pipe and an erosion resistant layer, wherein the surface of the metal pipe is coated with the erosion resistant layer; a plurality of kinds of defect lines are distributed on the pipeline and comprise erosion resistant layer thinning, erosion resistant layer damage and erosion resistant layer stripping; the diameter of the pipeline is 500-1016mm, the length of the pipeline is more than or equal to 50m; a probe ring is arranged on the pipeline; the pipeline is externally connected with a circuit which is in a cathodic protection mode. The verifying method comprises the following steps: recording the defect lines on the sample pipe to form a database, burying the sample pipe underground, testing the sample pipe by adopting to-be-verified devices according to corresponding testing methods, and performing contrastive analysis between testing results and parameters pre-stored in the database so as to judge whether the testing capability of the to-be-verified devices meets the standards. The sample pipe and the method can be used for repeatedly verifying the testing capability of a plurality of kinds of erosion resistant layer detectors, so that the accuracy of the detectors can be improved, and further the relatively reliable guarantee can be provided for safe use of the pipeline.