X-Ray Radiography

Decibel NDE Inspections & Training Institute

21 Dec 201701:43

Summary

TLDRThis video script outlines the process of radiography testing, a method using ionizing radiation like X-rays to create images of objects. An examiner marks the weld area, sets up the X-ray equipment, and operates it remotely to avoid exposure. The X-rays penetrate the material, creating an image on film or a plate, which is then processed and analyzed to assess the object's quality and compliance with standards.

Takeaways

📸 Radiography testing uses ionizing radiation to create images of objects.
🔎 X-rays are a common type of radiation used for radiography.
📏 A measuring tape is used to mark the weld for inspection, making it visible on the x-ray.
🎞️ Film or imaging plates are mounted on the object to capture the radiographic image.
🚫 The examiner leaves the area and operates the x-ray device remotely to avoid radiation exposure.
⚙️ The x-ray machine's voltage, current, and duration are adjusted based on the material and wall thickness.
🔬 X-rays penetrate the material, creating an image on the film or imaging plate.
🔍 The image is processed to reveal details that the examiner can interpret.
👀 The examiner's experience is crucial for interpreting the image and assessing the object's quality.
🏗️ The process helps determine if the inspected object meets the required standards.

Q & A

What is radiography testing?
-Radiography testing is a non-destructive testing method that uses ionizing radiation, such as gamma rays or X-rays, to create images of an object's internal structure on various viewing media.
How is the weld marked for inspection in radiography testing?
-The examiner marks the weld to be inspected with a measuring tape, making it visible on the X-ray so that the exact location of possible irregularities can be determined.
What is the purpose of mounting the film on the object?
-The film is mounted on the object to capture the radiographic image produced by the X-rays passing through the material.
Why does the examiner leave the area during the irradiation process?
-The examiner leaves the area and operates the device remotely to avoid exposure to the ionizing radiation.
What safety measures are taken during radiography testing?
-The examiner closes the lead door and operates the device remotely to protect themselves from radiation exposure.
How does the examiner adjust the X-ray machine settings?
-The examiner adjusts the voltage, current, and duration of the X-ray exposure depending on the material being investigated and the wall thickness of the object.
What happens during the irradiation process?
-During irradiation, X-rays pass through the material and generate a radiographic image on the film or imaging plate.
What is the role of the imaging plate in radiography testing?
-The imaging plate captures the radiographic image produced by the X-rays, similar to how film does, and is used for digital radiography.
How is the quality of the inspected object determined after processing the image?
-The processed image is interpreted by the examiner, who uses their experience to determine the quality of the inspected object and whether it meets the required standards.
What are the potential irregularities that radiography testing can reveal?
-Radiography testing can reveal internal irregularities such as cracks, voids, inclusions, and other defects that are not visible from the surface.
Why is it important for the examiner to have a trained eye when interpreting the radiographic images?
-A trained eye is crucial for accurately interpreting radiographic images to identify and assess the severity of any defects, ensuring the safety and integrity of the inspected object.

Outlines

00:00

📸 Radiography Testing Process

The paragraph describes the process of radiography testing, which uses ionizing radiation like gamma rays or X-rays to create images of objects. The examiner marks the weld to be inspected with a measuring tape, ensuring it's visible on the X-ray for identifying irregularities. The film is placed on the object, and the X-ray tube is carefully set up. The examiner then leaves the area, closes the lead door, and operates the device remotely to avoid radiation exposure. They adjust the voltage, current, and duration based on the material being investigated and its wall thickness. After irradiation, the X-rays pass through the material and create an image on the film or imaging plate. Once processed, the examiner interprets the image to determine the quality of the inspected object and whether it meets standards.

Mindmap

Keywords

💡Radiography testing

Radiography testing is a non-destructive testing technique that uses ionizing radiation to visualize the internal structure of an object. In the context of the video, it is used to inspect welds for irregularities. The process involves exposing the object to X-rays or gamma rays, which then create an image on a viewing medium. This technique is crucial for quality control in industries such as construction and aerospace.

💡Ionizing radiation

Ionizing radiation is a type of electromagnetic radiation that carries enough energy to ionize atoms or molecules, meaning it can remove tightly bound electrons. This is exemplified in the video by the use of X-rays for radiography testing. Ionizing radiation is powerful enough to penetrate various materials and is used in medical imaging and industrial testing.

💡Gamma rays

Gamma rays are a form of ionizing radiation that originates from atomic nuclei and are characterized by very short wavelength and high energy. In radiography testing, gamma rays could be used instead of X-rays for imaging, as they can penetrate denser materials. The script mentions gamma rays as a potential source of ionizing radiation for radiography.

💡X-rays

X-rays are a form of electromagnetic radiation with a wavelength shorter than that of visible light but longer than gamma rays. They are used in the video to create images of the internal structure of objects, specifically welds. X-rays are widely used in medical imaging and industrial radiography due to their ability to penetrate and reveal the internal structure of materials.

💡Measuring tape

A measuring tape is a tool used to measure distances or lengths. In the video, it is used to mark the weld that needs to be inspected, ensuring that the exact location of the weld is visible on the X-ray image. This tool is essential for accurately locating and assessing the weld's quality.

💡Film

In the context of radiography testing, film refers to the imaging medium on which the X-ray image is captured. The film is sensitive to the radiation and, once exposed, captures the internal details of the object. In the video, the film is mounted on the object to be inspected, and after exposure to X-rays, it is processed to reveal the radiographic image.

💡Imaging plate

An imaging plate is a digital alternative to traditional X-ray film. It is used to capture radiographic images and can be read by a scanner to produce a digital image. The script implies the use of either film or an imaging plate to capture the radiographic image, which is then processed to assess the object's quality.

💡Voltage

Voltage is the electric potential difference that drives the flow of electric charge. In the video, adjusting the voltage is part of setting up the X-ray tube for radiography testing. The voltage determines the energy of the X-rays produced, which is crucial for penetrating the material being tested and obtaining a clear image.

💡Current

Current refers to the flow of electric charge in a circuit. In the context of radiography testing, adjusting the current affects the intensity of the X-ray beam. The current, along with the voltage, determines the exposure settings necessary for capturing a clear radiographic image of the object.

💡Duration

Duration refers to the length of time for which a process or activity continues. In the video, the duration of irradiation is an important parameter that the examiner adjusts based on the material being tested and its thickness. Longer durations can result in more exposure, potentially providing clearer images but also requiring careful management to avoid overexposure.

💡Irradiation

Irradiation is the process of exposing an object to radiation. In the video, irradiation is the step where the object is exposed to X-rays to create a radiographic image. This process is critical for non-destructive testing, as it allows for the inspection of the object's internal structure without causing damage.

💡Interpretation

Interpretation in this context refers to the analysis and understanding of the radiographic image by the examiner. After the image is processed, the examiner uses their expertise to interpret the image and determine the quality of the inspected object. This step is crucial for assessing whether the weld or object meets the required standards.

Highlights

Radiography testing uses ionizing radiation for imaging objects.

Gamma rays or X-rays are utilized for radiography.

The examiner marks the weld for inspection with a measuring tape.

Markings are visible on the X-ray to identify irregularities.

Film is mounted on the object for capturing the X-ray image.

X-ray tube setup is crucial for accurate imaging.

The examiner operates the X-ray device remotely to avoid radiation.

Lead door is used to protect the examiner from radiation.

Voltage, current, and duration are adjusted based on material and wall thickness.

Irradiation process involves X-rays passing through the material.

Radiographic image is generated on film or imaging plate.

Processing of the film is necessary to interpret the image.

Examiner's experience is key to interpreting the radiographic image.

The image determines the quality of the inspected object.

Standards are assessed based on the radiographic image.

Music is used to indicate transitions in the process.

Remote operation of the X-ray device enhances safety.

The use of lead door and remote operation minimizes radiation exposure.

Adjusting the X-ray parameters is critical for accurate imaging.

The radiographic image provides insights into the object's integrity.

The process concludes with the assessment of the object against standards.