海底管道无损检测技术的评定中，检测技术的检出能力由检测数据与缺欠的实际特征对比来确定，缺欠的实际特征只能通过破坏性试验获得。主要根据DNVGL （挪威船级社）等标准的要求，结合在类似项目中获得的经验，对海底管道无损检测技术评定破坏性试验的工序及关键技术进行了研究，内容包括缺欠的定位及标记、缺欠的机加工工序、切片的处理、缺欠的测量方法等，并形成了一套比较成熟的技术流程，对海底管道无损检测技术评定的破坏性试验具有较强的指导意义。

The detection ability of a non-destructive testing method shall be obtained by comparing NDT data and imperfection true parameter derived from destructive tests. By a combination of DNVGL standard and application in subsea pipeline project, destructive tests and key techniques are researched in this article which contains positioning and marking on test piece of imperfection, machining process, slice disposal, imperfection measurement, etc., and this developed procedure has practical and instructional significance of destructive test in NDT method qualification in subsea pipeline project.