As the term implies, non-destructive testing (NDT) is a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component or system without causing damage to said materials. And while the term may seem self-explanatory, people who work in this field have an entire lexicon that they use to communicate with each other. Here are some terms and their meanings as they relate to NDT.
- Discontinuity: This is a lack of continuity or cohesion in a material. Such flaws whether intentional or unintentional can cause an interruption in the physical structure or configuration of a material or component ultimately leading to its failure at a critical moment.
- Eddy Current Testing (ET): ET inspection is based on the interaction between a magnetic field source, a coil, and the electrically conductive material to inspect.
- Flaw: This is an imperfection in a machine part or material that can be either large or small. Not all flaws are worth addressing. It depends upon the magnitude and type of flaw that is involved.
- False indication: This is a machine error that detects a flaw where no flaw exists. As you can probably guess, false indications are not actionable and can be ignored. However, it might be wise to re-examine your equipment if such indications persist during inspections.
- Internal imperfections: Not all imperfections are visible to the naked eye. This is why sophisticated techniques such as immersion ultrasonic testing equipment are needed when inspecting materials and parts.
- Planar discontinuity: This is a discontinuity having two measurable dimensions.
- Non-planar discontinuity: This is a discontinuity with three measurable dimensions
This are just a few of the terms used in the area of non-destructive testing which can become quite specialized. Our company supplies the latest, most sophisticated NDT testing equipment in the world. We keep up-to-date on all developments due to the importance of this growing field. We also know that your asset and public are on the line when machine parts, systems and materials have not been thoroughly inspected.