Non Destructive Testing NDT

The Classic Non-Destructive Testing Methods

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Intended Use of the Various NDT Processes

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Ultrasonic Testing

Ultrasonic testing is used to find material defects such as cracks and inclusions in materials. Ultrasound is often used to inspect welds for voids, root depth, bonding and geometry.

Ultrasonics, can also be used to measure material thickness and detect corrosion

Phased Array (PAUT)

The phased array technique is a special form of ultrasonic testing. Highly sensitive phased arrays guide the high-frequency sound beams through the test specimen. Complex geometries and defect sizes in a wide variety of materials are detected in real time. The advantage is that the test specimen only has to be sonicated from one side in order to detect an internal material defect or to examine a weld seam.

Powerful software is used to evaluate the returned echoes, providing a detailed pseudo three-dimensional representation of the internal structures. The phased array technique is used for highly complex and safety-relevant components such as pipeline welds, aircraft components and automotive components.

Endoscopy / Videoscopy

Highly Flexible or Rigid Endoscopy

With our smallest endoscopes / videoscopes, we can reach places that were previously unobvious. The smallest openings, such as screw holes, serve as access. The probes are highly flexible and arbitrarily maneuverable, as well as insensitive to liquids and heat. The images and films can then be stored and sent digitally.

Suitable for turbines, combustion engines, e-mobility, pipelines, complex CNC components, etc. We certainly have the right equipment with trained professionals for you.

Mobile X-Ray Systems / Radiographic Testing (RT)

Radiographic testing (RT) is an imaging method of non-destructive material testing. Using X-ray sources or gamma sources, material differences such as inclusions, cracks, welds are imaged on film or digital detectors. The analyses comply with DIM and ASTM specifications.

Magnetic Particle Inspecting / Fluxing (MT)

Detection of Cracks near the Surface

For this test, the workpiece must be magnetized. Cracks at or near the surface are detectable.The application of the metal particles occurs during magnetization. The iron particles are dissolved in a fluorescent liquid. The magnetic powder particles are combined with color pigments. The color pigments stand out clearly when irradiated with ultraviolet light. Standardized testing is regulated in EN ISO 3059.

While the classic indentation test is used as a non-destructive method for components of all kinds, the magnetic particle test is only suitable for ferromagnetic components.

Dye Penetrant Testing (PT)

The non-destructive dye penetrant method is suitable for the indication of defects close to the surface, such as cracks, pores and binding defects. The method is standardized in EN 571 and ISO 3452.

A penetrant liquid is applied to the cleaned surface of the test specimen. This liquid penetrates into existing pores or cracks.
After a waiting time, the liquid is rinsed off. The penetrant remains in any cracks. Now a developer is applied. The developer makes the liquid that has penetrated into the cracks visible.

The examination method is mainly used for metallic materials, but is basically suitable for all non-porous materials whose surfaces are free of rust and grease. With its extremely low inspection effort, the dye penetrant method is popular for mobile applications and spontaneous individual examinations. Finally, the method enables the targeted visualization of all material defects, such as cracks, folds or pores, which are openly located in the material surface.

Eddy Current Testing (ET)

Detection of Near-Surface Cracks and Layer Thickness Measurement 

Non-destructive testing for electrically conductive materials. Eddy currents are induced in the material to be tested. The eddy current density is detected by means of a sensor. Damage and impurities change the electrical conductivity of the material and are indicated. Eddy current testing is often used in conjunction with ultrasonic testing, where ultrasonic testing detects defects deeper in the material but cannot detect defects near the surface.
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