Problems in the NDT world: The penetrant inspection method

When discussing a subject like non-destructive testing (NDT) with other professionals who have basically the same qualifications and certifications as yourself, it becomes apparent that the liquid penetrant method of examination is often chosen as the simplest and easiest method for many applications. No matter how simple an NDT application may seem, however, the bottom line is that the desired results of the application reveal the true status of the item under inspection. Therefore, it is very important that the personnel performing any NDT function possess the skills and knowledge of the specific discipline being applied. This article addresses some basic questions concerning liquid penetrant testing. It is the intent of this paper to help NDT personnel obtain a better understanding of the many approaches industry has in developing guidelines for the penetrant discipline.