Making method for simulated hole defects of nuclear safety three-level HDPE pipeline

The invention relates to the technical field of detection and evaluation authentication, and provides a making method for simulated hole defects of a nuclear safety three-level HDPE pipeline. The method comprises the steps of S1, selecting a test pipeline, and acquiring a backfilling amount L at a pipeline defect after the test pipeline is welded; S2, selecting a simulated pipeline, and marking out a plurality of positions used for making the simulated hole defects on the simulated pipeline; S3, drilling the marked positions to obtain simulated holes, wherein the depth of each simulated hole is larger than the backfilling amount L; and S4, mutually welding one ends, with the simulated holes, of two simulated pipelines, or welding one end, with the simulated holes, of the simulated pipelinewith a normal pipeline to form a simulated joint with the hole defects. When an ultrasonic nondestructive detection method is adopted, the sizes and positions of the hole defects in the simulated joint can be accurately dete