Visual Testing of Materials
Visual Testing (VT) is a basic and cost-effective method of inspection and is used to gain a quick indication of the inspected specimen or asset. It is the process of looking over a piece of equipment using the naked eye to verify the general integrity. No specific tools are needed.
About Visual Testing
Visual Testing is one of the most common NDT methods to perform quality control of a product or component during or after a new construction. After commissioning, visual testing is performed for periodical and non-periodical inspections. Visual testing can be performed in direct mode (with the bare eye) or via an indirect method, by mirrors, cameras and other equipment also called advanced visual testing
As specific tools and equipment are not often needed for visual testing, it is sometimes seen as the easiest NDT method, but it is not. It needs to be performed by trained NDT operators or inspectors with experiences of the object under inspection. Using reference catalogues of the most common defects and failures, helps DEKRA’s visual testing experts to judge the condition of the material. Visual testing is often used in combination with a second volumetric NDT method.
DEKRA’s efficient visual testing methods of materials are used for:
- All stages of manufacturing of materials, welds, castings, products etc.
- Periodical industrial inspections at machine, equipment, engines, turbines, aircrafts etc.
- Periodical and non-periodical industrial inspections at power stations; including boilers, vessels, drums, pipelines etc.
- Periodical and non-periodical industrial inspections in the oil and gas industry, including reactors, pipelines, storage tanks, heat exchangers, etc.
- Periodical and non-periodical industrial inspections in the chemical industry, including pumps, buried pipes and chemical storage
- Public transport, trains, ships, buses and trams
- Buildings and constructions such as bridges, oil platforms and windmills
- Periodical inspection of pressurized equipment and installations