Basic principle
Radioactive testing uses rays (such as X-rays or gamma rays) to penetrate and interact with materials, and infer the internal structure and defects of the material through the degree of ray attenuation. When the rays penetrate the pipeline, if there are defects inside the API 5L X52 PSL2, the rays will scatter and absorb in these areas, resulting in a decrease in the intensity of the transmitted rays. By receiving and analyzing these changes through a special detector, an intuitive image can be formed on the screen to show the defects inside the pipeline.
Technical classification
X-ray detection: Suitable for small and medium-sized API 5L X52 PSL2 pipelines. By adjusting the voltage and current of the X-ray source, it can detect pipelines of different thicknesses and obtain high-precision internal defect images.
γ-ray detection: Suitable for large and thick-walled API 5L X52 PSL2 pipelines. Because of its strong penetration, it can effectively detect deep cracks, unfused and other serious defects. Combined with computer image processing technology, it can also realize automatic detection and defect identification.
Inspection steps and key points
Preparation before inspection: Clean the surface of the pipeline, remove contaminants, determine the radiographic specifications, transillumination method, X-ray machine model and other parameters.
Equipment calibration: Ensure the accuracy of X-ray energy and exposure time.
Exposure and imaging: Place the pipeline in the X-ray beam path to form an image.
Darkroom processing: If film imaging is used, film processing is required in a darkroom.
Image analysis: Analyze the image through professional software, identify defects and evaluate them.
Inspection report: Prepare a detailed inspection report, including information such as inspection conditions, results and defect evaluation.
