RT - Radiographic Testing
A radiographic test is an inspection method to detect defects inside the specimen by interpreting the image formed on the X-ray film when transmitting radiation such as X-rays or ∂ rays through the specimen.
This method is currently the most widely
used among non-destructive testing methods intended to detect defects.
< Features >
- Able to inspect almost all materials
- Able to retain test results permanently
- Provides high detection performance on welding defects.
- Shows the real state of internal defects as they are.
- Requires safety gear for protection from radiation.
- Only qualified personnel can handle it
UT - Ultrasonic Testing
An ultrasonic test is an inspection method that detects the size and location of a defect in the specimen by interpreting the ultrasonic beam reflected from the defect area when transmitting ultrasonic waves of a high frequency (1MHz to 25MHz) through the specimen.
< Features >
- Reveals the location and size of a defect deep inside the object.
- Able to be used for all ferrous metals and non-ferrous metals
- Inspection results are available in real-time.
- Produces better performance than radiographic tests in terms of the detection of defects on surfaces such as cracks.
- Affected by the competence of the test personnel
- Retention of test results is not easy as only a test report is available for the test result record.
MT - Magnetic Particle Testing
A magnetic particle examination is an inspection method to determine defects by evaluating the magnetic particle indication formed on the defect area when applying magnetic particles to the magnetized specimen.
< Features >
- Can be used for ferromagnetic items (steel or alloy steel).
- Easy to detect defects formed on or near the surface of the specimen.
- The location of discontinuity should be perpendicular to the direction of the magnetic flux for detection.
- Can be applied to a specimen regardless of the size and shape of the specimen.
- Easy to use, and is time and cost effective
PT - Penetrant Testing
A liquid dye penetration inspection is an inspection method to visually detect open defects on the surface of the specimen by observing the shape formed after inserting a penetration agent that contains visible dye or fluorescent materials.
< Features >
- Can be applied to a wide range of materials.
- Features simple principles of use compared to other inspection methods, and is easy to use.
- Inspection on a local area is possible, and interpretation is relatively easy.
- Can’t be used on a rough surface or a porous specimen.
- Access to the surface on which the test is to be performed is required.
- Can only be applied to open discontinuity.
- Limited by the surrounding environment and ambient temperature.
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