Recognize Damage to Products by Using NDT Testing
Non-Destructive Test or abbreviated as NDT testing is a testing of objects without damaging the object to determine the condition of the material, especially if there is damage or disability. The application of this inspection is carried out to minimize the occurrence of damage to the object being tested.
There are many types of non-destructive tests, all of which are tailored to your needs. We will also provide a complete review of the meaning so that you can understand the term properly. This information can be seen through the following discussion below!
What is NDT Test
Non Destructive Test or NDT testing is a testing and analysis technique by inspection bodies as material for evaluating the properties of components, materials, structures and systems. This test is carried out to detect defects or causes of damage.
This test is carried out carefully so that it will not damage the various original components at all. NDT is also known as Non-Destructive Inspection (NDI) or Non-Destructive Evaluation (NDE).
The methods used also include several methods, including acoustic emission testing or AE, electromagnetic or ET testing, ground penetrating radar, etc. Non Destructive Test is divided into several types, where each type has a different role.
We will discuss these various types in the following discussion. By now, of course, you already understand the outline of what it means. Now, let’s follow us to review NDT testing further through the discussion of the types below.
Types of NDT Test
We have discussed on the various types of Non-Destructive Tests in our discussion of their meaning. Now, let’s follow us to review what these types are in the following explanation:
1. Radiographic Test
Examination using x-rays or gamma rays at this first point can be carried out on all materials, except lead. The application of x-rays can detect defects from the beginning from within the object.
The intensity of radiation from this type of test will adjust to the thickness and density of the material being examined. The advantages of applying radiographic tests in NDT testing are:
- Ability to detect the occurrence of defects on the surface of the weld metal and bog material
- Presents recorded data
- Defects on the film the ratio is 1:1
- Even in difficult positions, this test can be done
Meanwhile, the disadvantages of radiographic tests are:
- Requires an expert with proven certificate of ownership to carry it out
- Costs incurred are more expensive
- Opportunity to leave the dangers of x-ray radiation and gamma rays
The advantages and disadvantages are common in every type of test. The field concerned just adjusts the use to the needs.
2. Magnetic Particle Inspection
This one test is carried out to check for potential defects on the surface or a layer slightly below the surface. The material being examined is a material with high magnetic properties.
One type of NDT testing is carried out to check whether there are magnetic particles left behind so that they can attract various other magnetic objects. Of course, there are advantages of magnetic particle inspection, including:
- Easy to do
- No need to involve experts in its implementation
Meanwhile, the disadvantages of this test are:
- It can only be used on ferromagnetic objects
- There are undetectable defects on objects in the direction of the magnetic field
You can determine whether the advantages and disadvantages can be tolerated or not. All tests are selected based on the least possible risk of damage.
3. Ultrasonic Flaw Detector
This type of test is considered the oldest method among other methods. As a type of NDT testing, ultrasonic flaw detectors have been carried out since 1940 where defects are informed through sound from composites, ceramics, metals, or plastics.
The advantages of this oldest type of test include the following:
- Defect detection is more accurate than other types
- Only need one side of the test object
- Distance information is clearly displayed on the CRT screen
- Simple test specimen preparation
- Can be used in addition to flaw detection
Not only advantages, this type of test also has disadvantages, such as:
- The probe and couplant must be able to touch the surface
- Higher skill and training than other types
- Surface roughness affects inspection results
- Difficulty inspecting thin objects
- Need a reference standard
As the oldest method, this test is used more often than other tests. However, you can consider the advantages and disadvantages first.
4. Vacuum Test
Vacuum test is a form of NDT testing, a method of making the material being inspected vacuum. Its implementation can use tubes or various transparent materials.
For the advantage, there is only one, namely the power supply is easy to obtain. While there are quite a few drawbacks, it is exactly the same as at the point of checking using an ultrasonic flaw detector.
5. Holiday Detector
Last, a holiday detector, meaning a tool used to detect empty gaps in a material. The existence of this empty gap can cause defects in various levels.
The five types of tests above are carried out to find out if there are cracks or damage to the object being tested without damaging it. Sucofindo provides NDT testing services to perform tests on materials used by the company.
For more information about testing and analysis services and mineral mining sector. you can read our article here. If you and your company need further information regarding our services, contact and consult about it here.
