Non-destructive testing (NDT) is the process that involves three processes, namely the process of inspecting, testing, or evaluating. NDT evaluates materials, components or assemblies to find out about the flaws or differences in characteristics that disable the smooth operation of the part or system. That means when the part is successfully evaluated and passes through flying colors that part of the machinery can still be used.
NDT over Other Destructive Testing
If you compare with another kind of tests, like tests, which are destructive in nature and hence to be done on a limited number of samples, rather than working on the materials, components or assemblies, while they are being used.
The destructive tests are utilized to find out the various physical properties of materials which include the ductility, impact resistance, yield and the tensile strength, find out about the fracture toughness and also the fatigue strength.
But the difference between the destructive and nondestructive kind of testing is NDT testing is more about finding out about the differences and discontinuities in the material characteristics.
The nondestructive tests are nowadays, used in a variety of areas like in-service inspections, fabrications, and manufacturing that not only helps control manufacturing processes but also lowers production costs which can maintain the quality level with ease.
During the construction phase, NDT helps overview the quality of materials and also maintain it, but can aid in some of the processes like during the fabrication and also erection phases. The in-service NDT inspectors inspect the products in use and evaluate it to find out about the integrity which is necessary to maintain their usefulness and their integrity.
It is true that nondestructive testing is also used in the medical field too, but the term “nondestructive testing” is usually not used to describe the medical applications.
NDT Test- The Methods Utilised
Different types of penetrating medium or the equipment which is used to perform that test are denoted different method names.
The different types of NDT methods used currently are,
- Acoustic Emission Testing (AE),
- Ground Penetrating Radar (GPR)
- Electromagnetic Testing (ET),
- Ground Penetrating Radar (GPR),
- Guided Wave Testing (GW),
- Microwave Testing (MT)
- Liquid Penetrant Testing (PT)
- Laser Testing Methods (LM)
- Leak Testing (LT)
- Liquid Penetrant Testing (PT),
- Radiographic Testing (RT)
- Ultrasonic Testing (UT)
- Neutron Radiographic Testing,
- Magnetic Flux Leakage (MFL),
- Thermal/Infrared Testing (IR)
- Visual Testing (VT).
Non-destructive testing professionals use their wide range of expertise in various fields like creative skills, technological and reasoning, to evaluate the materials, structures, and equipment.
The NDT testing professionals bank upon various reliable methods to find the imperfections and find innovative methods which can develop new technology to bring about vast improvements in the field.
Non-destructive testing specialists gather information from different sources regarding the materials in question. This accumulated information is used to decide whether there are any defects in the materials and then to make a decision whether there are proper regulations and standards were maintained when building the equipment and structures.
mation from different sources regarding the materials in question. This accumulated information is used to decide whether there are any defects in the materials and then to make a decision whether there are proper regulations and standards were maintained when building the equipment and structures.
NDT laboratories cater to various industries which include civil, forensic, mechanical, systems, electrical, aerospace and aeronautical engineering, and also medical applications. The two terms nondestructive inspection (NDI) and Nondestructive evaluation (NDE) are often referred to when describing the nondestructive testing methodology.