Rope Access NDT Services

DM NDT is a pioneer in the use of alternative access solutions across a range of industries to enable operational work at-height. Our full scope of access services include rope access inspection and maintenance, rope access NDT Services and training sessions.

DM NDT can support with any needs in oil & petrochemicals industry, marine and offshore services and commercial sectors.

More about DM NDT

What is Conventional NDT?

Conventional methods of non-destructive testing (NDT) are used in a variety of industry sectors, including oil and gas, renewables, rail, construction and fabrication, shipbuilding, steel production, biochemical, theme parks and fairgrounds.

The methods used for conventional NDT include visual testing, penetrant testing, magnetic testing, ultrasonic testing, radiographic testing and eddy current testing. None of the materials under test are harmed during these procedures.

UT – Ultrasonic Testing (UTM / UT Flaw / High Temp UT)

Ultrasonic testing (UT) is the propagation of ultrasonic waves into a material or test object to detect internal faults or describe materials. Materials on which this testing is done includes steel, other metal and alloys, concrete, wood and other composites. It is widely used in steel and aluminium construction, oil & gas metallurgy, manufacturing, aerospace, automotive, marine and other transportation sectors.

MT – Magnetic Particle Testing

Magnetic Particle Testing (MPT) is the process for detecting surface and shallow subsurface discontinuities in ferromagnetic materials by putting a magnetic field into the part. Magnetic lines of force are perpendicular to the electric current’s direction. The presence of a surface or subsurface discontinuity in the material allows magnetic flux to leak and therefore be detected when wet or dry ferrous particles are applied to the surface

PT – Penetrant Testing

Liquid Penetrant Testing (LPT) is used to inspect non-porous materials for surface-breaking faults in metals, plastics, or ceramics. It detects casting, forging, and welding flaws such as hairline cracks, surface porosity, leaks, and fatigue cracks. LPT is based upon capillary action, where low surface tension fluid penetrates clean and dry surface-breaking discontinuities.

CRT – Conventional Radiography Testin

Conventional Radiography Testing (CRT) is a technique that uses either x-rays or gamma rays to study the inside structure of a component. It is frequently used to inspect machinery like pressure vessels and valves, find faults and weld repairs. It uses a sensitive film that reacts to the emitted radiation to capture an image of the part being tested. This image can then be examined for evidence of damage or flaws.

ET – Eddy Current Testing

The most common use for eddy current testing is to inspect tubes and surfaces. It is a very sensitive testing technique that can detect the smallest imperfections or cracks in a surface or just below it. It uses the principle of electromagnetic induction to detect flaws in conductive materials. An excitation coil carrying current is placed in proximity to the component to be inspected

VI – Visual Inspection

Our technicians visually detect, locate and assess discontinuities or defects that appear on the surface of material under test.

Holiday Testing

Holiday testing is a non-destructive test method applied on protective coatings to detect unacceptable discontinuities such as pinholes and voids. The test involves checking an electric circuit to see if current flows to complete the circuit.

Hardness Testing

Hardness is a characteristic of a material which is defined as the resistance to indentation, and is determined by measuring the permanent depth of the indentation. When using a fixed force (load) and a given indenter, the smaller the indentation, the harder the material. Indentation hardness value is obtained by measuring the depth or the area of the indentation. It is used to check material characteristics and functionality like wear resistance, toughness, and resistance to impact.

PMI – Positive Material Identification

Positive Material Identification (PMI) is a fast method for verifying the chemical composition of metals and alloys. It can be used to verify that supplied materials conform to the proper standards and specifications.

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