Non-destructive
testing services

Magnetic Particle Testing

Magnetic Particle Testing is a non-destructive testing method used to detect surface and near-surface discontinuities in ferromagnetic materials such as carbon steel, low-alloy steel and cast iron.

During the inspection, the component is magnetised, creating a magnetic field within the material. If a crack or other discontinuity interrupts the magnetic field, a magnetic flux leakage occurs at that location. Magnetic particles are then applied to the test surface, where they gather around the leakage field and form a visible indication of the discontinuity.

Radiographic Testing

Industrial Radiography (RT) is a non-destructive testing method used to examine the internal structure and integrity of components, welds and fabricated structures without causing damage to the material. It uses X-rays or gamma radiation to produce an image of the component, allowing internal discontinuities that cannot be detected through visual inspection to be identified.

During the inspection, radiation is directed through the component onto a radiographic film. Differences in material thickness, density or internal structure affect the amount of radiation reaching the detector, producing an image that can reveal discontinuities such as porosity, slag inclusions, lack of penetration, lack of fusion, cracks and other internal imperfections.

Dye Penetrant Testing

Dye Penetrant Testing, also known as Liquid Penetrant Testing, is a non-destructive testing method used to detect surface-breaking discontinuities in non-porous materials.

During the inspection, the test surface is thoroughly cleaned and prepared, after which a visible or fluorescent penetrant is applied. The penetrant is allowed sufficient time to enter any surface-breaking defects through capillary action. The excess penetrant is then removed from the surface and a developer is applied. The developer draws the trapped penetrant back out of the discontinuity, creating a clear, visible indication of the defect.

Ultrasonic Testing

Ultrasonic Testing uses high-frequency sound waves to inspect materials for internal and surface-breaking discontinuities without causing damage to the component.

During testing, an ultrasonic probe sends sound waves into the material. As the sound waves travel through the component, they are reflected when they encounter interfaces, changes in material structure, or discontinuities. The reflected signals are displayed on an ultrasonic instrument, allowing a qualified technician to assess the location, depth and size of indications.

Ultrasonic Wall Thickness Measurement

Corrosion and erosion do not announce themselves. Wall thickness measurement gives you a grid of real numbers across a vessel, tank or line — and repeated over time, a trend you can plan a shutdown around instead of reacting to a failure.

Readings are taken at referenced locations so the survey can be repeated at the next inspection interval and compared directly against the previous data set.

Hardness Testing

Welding and heat treatment change the material, and hardness is the quickest honest reading of whether that change is inside specification. Excess hardness in the heat-affected zone is a defect waiting for a service load — we take the readings to the relevant hardness scale and compile a detailed report.

Visual Testing

Visual Testing is the oldest and most basic NDT method — and the foundation for all the others. If you cannot see a defect, you often cannot test for it properly with another method.

It is the visual inspection of a surface to find discontinuities: anything that breaks uniformity — cracks, corrosion, misalignment, weld defects, dents, wear, leaks and colour changes. It does not just mean looking with your eyes. It is a formal, codified procedure with lighting, distance and angle requirements.

Where we cannot get direct access, we use tools to bring the image to you — borescopes, for example.

Vacuum Box Testing

Vacuum Box Testing is a leak test for welds, and one of the most common NDT methods for tanks, vessels and floors where you cannot pressurise from the back side. It checks whether a weld is completely leak-tight.

It creates a low-pressure zone on one side of the weld. If there is any hole, crack or lack of fusion, air from the outside is drawn through and you will see it as bubbles.

Principle: atmospheric pressure + soap bubbles = leak detection