Radiography (RT)
Radiographic Testing involves the use of X-rays or gamma rays to inspect the internal structure of a material. It is effective for detecting internal defects such as voids, inclusions, and cracks.RT is commonly used in industries like aerospace and welding.
RT involves the use of X-rays or gamma rays to inspect the internal structure of a material. It is often used to detect flaws such as cracks, voids, or inclusions.
RADIOGRAPHY (RT) GAMMA
Radiography (RT) is the most used NDT method in detecting volumetric, internal defects in welds and castings. There are two Radiography methods that can be used, X-Ray & Gamma radiography. Both methods can be used in-house in purpose-built radiography bays and on site.
Advantages
• No surface preparations required.
• Permanent record in the form of a radiograph.
• Can be used on most materials.
• No minimum material thickness required.
• No power required. Is more suitable for complex geometries incomparison to X-Ray.
• Portable for onsite operations in comparison to X-Ray. Ability to detect small defects.
What defects/indications can it detect?
• Internal planar defects (such as lack of fusion).
• Cracks
• Volumetric defects (such as slag and porosity).
• Voids and solid inclusions.
• Corrosion or thinning (profile method.
Commonly used to test
• Storage tanks.
• Pipe work.
• Pressure vessels.
• Small metal components.
• Forgings/castings.
• Welds
Limitations
• Can only be used in controlled areas (areas need to be cordoned off with restricted access.
• Can affect other site operations being carried out (for example, other trades cannot be in close proximity).
Alternative inspection methods
• Radiography (RT).
• Phased Array (PA).
• RADIOGRAPHY (RT) X-RAY