Radiographic Testing (RT) Services
Radiographic Testing uses X-rays or gamma rays to create images of a component's internal structure, revealing hidden defects.
What is Radiographic Testing?
Radiographic Testing (RT) uses penetrating radiation (X-rays or gamma rays) to examine the internal structure of materials and components. Radiation passes through the test object and is captured on film or digital detector, producing an image that reveals internal discontinuities such as voids, porosity, cracks, and inclusions. RT provides a permanent record of the inspection and is considered the definitive method for weld quality verification.
How RT Works
Radiation penetrates through the test material
Density differences cause varying absorption rates
Film or digital detectors capture transmitted radiation
Image contrast reveals internal discontinuities
Applications of Radiographic Testing
Advantages
- Provides permanent visual record
- Can inspect complex internal geometries
- Less operator-dependent than UT
- Detects volumetric defects effectively
- Applicable to most materials
Limitations
- Radiation safety concerns require exclusion zones
- Two-sided access typically required
- Poor for detecting planar defects parallel to beam
- Film processing time (conventional)
- Equipment can be expensive
Applicable Standards & Codes
Industries Using RT
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Other NDT Methods
Ultrasonic Testing uses high-frequency sound waves to detect internal flaws, measure material thickness, and characterize material properties.
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