NDT Courses

SANDE offers various Non Destructive Testing (NDT) training courses covering the 6 main NDT methods and techniques. In-house training or training can be arranged dependent on method, venue and numbers of candidates.

Magnetic Particle Testing

Magnetic fields are introduced into a ferromagnetic material. If there are any surface or sub-surface flaws in the material, magnetic flux leakage fields are generated by these flaws. The flux leakage fields may be detected with the use of ferromagnetic particles when attracted to the flux leakage site. Flux leakage fields may also be found by the use of special (Hall effect) sensors.

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Liquid Penetrant Testing

This method relies on its ability to detect surface breaking flaws. The surface of the component/unit is prepared carefully and thoroughly, then a strongly coloured liquid is applied to the surface after which the excess is removed from the surface and a developer, which acts as a blotter, is applied and draws trapped penetrant back onto the material surface. Flaws are then revealed as red or fluorescent stains on a contrasting background.

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Ultrasonic Examination

Mechanical sound energy pulses are passed into the material and if there are any flaws in the material they act as reflectors. The energy then bounces off these reflectors and is returned to the instrument as an echo. Electronic images are then displayed on a monitor.

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Radiographic Examination

Short wave radiation energy, namely x-rays or gamma rays are passed through the material under inspection. The energy which passes through the material is captured on a receptor (x-ray film or viewing screen). After due processing the shadow picture on the film is viewed and evaluated.

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Eddy Current Testing

Circulating electrical currents are induced in conductive materials. Any flaws in the material will cause a disruption in the flow of these eddy currents which may be sensed by a coil and displayed on a monitoring device.

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Visual Inspection

Visual inspection is a common method of NDT and quality control, data acquisition, and data analysis. Visual Inspection can used in inspection of raw materials, maintenance of facilities and in service equipment using raw human senses such as vision, touch and/or any non-specialized and specialized inspection equipment under the appropriate lighting conditions.

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Radiation Safety Course and Exam

The Industrial Radiation Safety course covers the principles and physics of the Radiographic method including equipment and techniques.

The course also covers the basic requirements for protection of people against exposure to radiation and for safety of radiation sources, either producing X rays or Gamma rays.

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Limited Ultrasonic Inspection Level II

Ultrasonic thickness gauging is a method of performing non-destructive measurement (gauging) of the local thickness of a solid element (typically made of metal.

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Limited Radiographic Inspection Level II

In addition to producing high quality radiographs, the radiographer must also be skilled in radiographic interpretation.

Interpretation of radiographs takes place in three basic steps: (1) detection, (2) interpretation, and (3) evaluation.

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