Non-destructive testing methods or NDT refers to an array of inspection methods that allows the inspectors to test and collect data about the product system or material without permanently changing its components.
NDT methods are testing and analysis methods used by non-destructive testing services in UAE, Dubai to evaluate the properties of any product for differentiating between the characteristics of similar products. NDT tests are also used to know if there are any defects in the products manufactured.
This helps in rectifying the defects in the product and providing the customers with the final products that would satisfy their demands and needs. Further, we are going to discuss different types of NDT tests.
Ultrasonic testing
Ultrasonic testing is a non-destructive testing method that uses ultrasonic sound waves to find the flaws and cracks in the product. It is also used to measure the material's thickness. It can be performed on concrete metal alloys, wood and welding inspection.
The advantages of ultrasonic testing are:
● It provides immediate results.
● It is portable in nature.
● It is safe to work around.
● Automation is possible in ultrasound testing.
● It is easier to look for the cracks if there are any.
The disadvantages of ultrasonic testing are:
● It requires trained operators for performing the test.
● Complex geometry is required in performing the test.
● It needs a special probe to be undertaken during the test.
Radiographic testing
Radiographic testing is used to expose the flaws like internal defects, lack of fusion, corrosion, geometry variation, porosity, inclusions, cracks, density changes, and misaligned parts of the materials through electromagnetic radiation. It uses radiation-sensitive film to show the flaws. The two different kinds of radioactive sources are X-Ray and Gamma-ray.
Advantages of radiographic testing are:
● It helps in scanning the complex geometry present in some materials.
● The testing is portable in nature.
● It helps in maintaining the permanent record of the test.
The disadvantages are:
● It is expensive in nature.
● Only trained operators are needed to perform the test.
● Sometimes it fails to capture the linear defect present in the material.
● There are radioactive hazards that come in handy with these tests.
Liquid Penetrant Testing
The liquid penetrant testing is used to detect the defects open to the surface of parts of the materials. These defects can be cracks, laps, wall leaks, etc.
The advantages of penetrant testing are:
● This test is low cost.
● They are portable in nature.
● The indications that the test gives can be further examined.
The disadvantages include:
● It is not able to detect the defects that are not open to the surface.
● The testing can only be performed after the parts are cleaned thoroughly.
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