NDT Services

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Non-Destructive Testing (NDT)

Non-destructive Testing (NDT), also known as non-destructive examination (NDE), refers to any testing or inspection method that does not permanently damage or destroy the equipment or material being tested. This is opposed to destructive testing, in which the part being tested is rendered inoperable, or destroyed, during the testing process. NDT is an incredibly common and important practice in many industries, including oil & gas, petrochemicals, chemical processing, aerospace, and manufacturing. NDT is frequently used to find discontinuities, flaws, or corrosion in materials. NDT is comprised of a number of different testing methods, most of which rely on either sound or electromagnetic waves to examine materials. AIMMS offers a wide array of NDT applications for turnaround and on-stream inspection activities.


Magnetic Particle Testing (MPT):

Magnetic Particle Testing (MPT) is a non-destructive testing (NDT) process for detecting surface and shallow subsurface discontinuities in ferromagnetic materials such as iron, nickel, cobalt, and some of their alloys. The process puts a magnetic field into the part. The piece can be magnetized by direct or indirect magnetization. Direct magnetization occurs when the electric current is passed through the test object and a magnetic field is formed in the material. Indirect magnetization occurs when no electric current is passed through the test object, but a magnetic field is applied from an outside source. The magnetic lines of force are perpendicular to the direction of the electric current, which may be either alternating current (AC) or some form of direct current (DC) (rectified AC).

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Penetrant Testing (LPT):

Penetrant Testing (PT) – also known as dye penetrant testing – is based on the properties of surface wetting and capillary action, which causes a liquid to rise when confined to a small opening. After applying the penetrant and wiping away the excess, the penetrant that rises to the surface can indicate surface-breaking anomalies. AIMMS’s PT services are widely applicable to identify discontinuities in a variety of assets given its ease of use and minimal equipment requirements. Our technicians perform PT on assets in a variety of industries, with a wide range of shapes, sizes, and materials, including:

  • Metals
  • Composites
  • Glass
  • Ceramics
  • Rubber
  • Plastics
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Ultrasonic Testing (UT):

Ultrasonic Shear wave testing, also known as angle beam inspection, is an ultrasonic testing technique used primarily for weld inspections. Awkward weld geometry and the presence of a weld crown or bead typically require shear wave testing, which entails placing a probe to the side of a weld and generating beams at an angle toward the weld.

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Ultrasonic Thickness Gauging (UTG):

Ultrasonic Thickness Gauging (UTG) is a performing non-destructive method analysis of the local thickness of solid material and is based on the time taken by the ultrasound wave to return to the surface. UTG is frequently used to monitor metal thickness or weld quality in industrial settings such as mining. AIMM’s technicians are equipped with portable UTM probes to reach steel plating insides, tanks, decks, and the superstructure. They can read its thickness by simply touching the steel with the measurement head (transducer). Accuracy is generally assured by first removing visible corrosion scale.

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Eddy Current Testing (ECT):

Eddy-current testing uses electromagnetic induction to detect flaws in conductive materials. It can detect very small cracks in or near the surface of the material. Parts capable of inducing current are put in contact or near a probe that emits electromagnetic currents through the part. The probe also looks for changes in how the current travels through the part. It picks up the changes and shows the irregular flow. This process can detect slight changes in the piece being inspected. The changes may be due to hardness difference, changes in material, or a void or crack in the part. The material surface needs minimal preparation, and physically complex geometries can be investigated. It is also useful for making electrical conductivity and coating thickness measurements.

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Alternating Current Field Measurement (ACFM):

ACFM inspection is an Electro-magnetic inspection technique that introduces an alternating current to detect surface defecting/linear cracks in steel surfaces. AIMMS have quality ACFM inspectors by quality instruments in order to meet the client requirements.

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