What Is Radiographic Testing (RT)?

Radiographic Testing (RT) is a non-destructive testing method that uses ionizing radiation—such as X-rays or gamma rays—to detect internal defects within a material. This technique works on the principle that radiation passing through a material is absorbed or scattered differently depending on variations in material density. As a result, internal flaws such as cracks, voids, or inclusions can be visualized on film or through a digital detector.

What Are the Standards for RT Testing?

The main international standards used for Radiographic Testing include:

• ISO 17636: The primary international standard that specifies procedures for industrial radiographic inspections.
• ASME Standards (American Society of Mechanical Engineers): Standards covering radiographic examinations of high-pressure vessels and piping systems used across industrial sectors.
• API 1104: The American Petroleum Institute standard for radiographic testing of pipelines used in oil and gas applications.

How Is RT Testing Performed?

Radiographic Testing is generally performed in the following steps:

1. Preparation and Cleaning: The surface of the material to be tested is cleaned of any dirt, oil, or rust to ensure accurate results.
2. Positioning the Radiation Source: The X-ray or gamma-ray source is positioned on one side of the material, and a film or digital detector is placed on the opposite side.
3. Radiation Exposure: Radiation is directed through the material. As it passes through, differences in material density cause variations in absorption or scattering.
4. Image Capture: The transmitted radiation creates an image on the film or digital detector. Defects appear as regions of differing contrast or density.
5. Image Evaluation: The resulting image is analyzed to identify internal flaws such as cracks, voids, or inclusions.
6. Reporting: The findings are compiled into a report that details the type, location, and size of any detected defects.

Where Is RT Testing Used?

Radiographic Testing is widely used in the following industries:

• Oil and Gas Industry: Used to detect internal flaws in pipelines, tanks, and other infrastructure components.
• Aerospace Industry: Applied to aircraft and rocket components to identify internal defects in critical parts.
• Automotive Industry: Used to inspect engines and metal components for hidden defects.
• Energy Sector: Ensures the integrity of materials used in power plants, nuclear reactors, and other critical systems.
• Machinery Manufacturing: Used for detecting weld-related and structural flaws in heavy machinery and components.
• Construction and Infrastructure: Identifies internal cracks and defects in concrete and metal structures.

RT Equipment and Techniques

Radiographic Testing requires specific equipment and techniques, including:

• Radiation Source: X-ray tubes or gamma-ray sources (e.g., Cobalt-60 or Cesium-137) are used to emit ionizing radiation.
• Film or Digital Detector: Used to capture the transmitted radiation and produce an image showing the internal structure of the material.
• Protective Equipment: Specialized protective gear, shields, and radiation barriers are used to protect operators from exposure.
• Radiographic Test Devices: Equipment that enables analysis of images using film or digital systems.
• Software and Analysis Tools: Digital imaging systems utilize advanced software to analyze and interpret results, improving accuracy and defect detection.

Advantages

• Detection of Internal Flaws: RT can identify deep internal cracks, voids, and inclusions that other methods may miss.
• Permanent Records: Radiographic films or digital images serve as long-term records for future reference.
• High Sensitivity: Allows for accurate detection and sizing of internal flaws.
• Non-Destructive Testing: No damage occurs to the material being tested, maintaining its usability.
• Wide Range of Applications: Suitable for various materials and industries.

Disadvantages

• High Cost: The use of X-ray or gamma-ray sources, as well as film and digital detectors, makes RT testing more expensive than other inspection methods.

Contact Us

For more information about Radiographic Testing (RT) or to develop customized inspection solutions, please contact us. Our expert team provides safe and effective testing services to help you quickly identify internal defects in your materials.

Contact us or reach out using the details below:

• Phone: +90 (850) 480 88 10
• Email: info@experte.com.tr
• Address: İçerenköy Mah. Değirmen Yolu Cad. Kutay İş Merkezi D No: 20 İç Kapı No: 11 Ataşehir / Istanbul

Get in touch with us to ensure your testing processes are conducted safely and efficiently!