RT
Radiographic Testing
Uses X-ray or gamma radiation to reveal internal flaws and structure within a component.
- Method code
- RT
- Materials
- Metals, composites and assemblies
- Product forms
- Welds, castings, composite structures
- Standards
- EN ISO 17636, EN ISO 5579, EN ISO 19232
Radiography passes penetrating radiation through a component to produce an image of what lies inside it, and leaves a permanent record that can be reviewed long after the inspection.
How it works
X-ray or gamma radiation is directed through the part onto film or a digital detector on the far side. How much radiation gets through depends on the thickness and density in its path, so a void, an inclusion or a change in section shows as a change in density on the resulting image. Image quality indicators are placed alongside the work and read on the finished radiograph, so the sensitivity actually achieved is demonstrated rather than assumed.
What it detects
Volumetric discontinuities are its strength: porosity, slag inclusions, shrinkage and lack of penetration in welds, and voids in castings. Cracks are found where they lie favourably to the beam. The method also verifies internal features and assembly, which no other method does as directly.
Typical applications
Weld examination in pressure and structural fabrication, casting inspection, composite structures, and internal assembly and foreign object checks where the component cannot be taken apart.
Sectors this method is used in
Other testing methods
Aircraft on the ground
Rapid Aircraft on Ground response to keep your aircraft safe and your operation moving.
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Magnetic Particle Inspection
Reveals surface and near-surface defects in ferromagnetic parts using magnetic fields and fine particles.
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Dye Penetrant Testing
Highlights surface-breaking flaws on non-porous materials using a penetrating dye and developer.
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Ultrasonic Inspection
Uses high-frequency sound waves to detect internal flaws and measure material thickness.
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Where to next
Approvals
The approvals we hold for NDT inspection on all aircraft types, materials and structures.
Find out moreServices
The full range of non-destructive testing methods we carry out, in the laboratory and on site.
Find out moreIndustries
The sectors we test for, from aerospace to petro-chemical and industrial.
Find out moreContact
Speak to the sales team, or reach any of our offices 24 hours a day for AOG support.
Find out more
Ready when you are
Talk to our inspection team
Tell us what needs inspecting and we will tell you how we would approach it, what it will cost and how quickly we can be there. No obligation, and you speak to an engineer rather than a call centre.
Aircraft on ground? The AOG line is answered around the clock, every day of the year.
