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The difference between ultrasonic testing and radiographic testing of gas pipelines
Release time:
2024-02-28 00:00
Source:
Fundamentals of 1. Ultrasonic and Radiographic Testing
Gas pipeline is one of the important pipelines for supplying natural gas. In order to ensure the safe operation and prolong the service life of the pipeline, regular inspection of the pipeline becomes very important. Ultrasonic testing and radiographic testing are two common detection methods.
Ultrasonic testing uses the propagation characteristics of ultrasonic waves in materials to detect cracks, corrosion, deformation and other defects in pipelines by recording the propagation time and reflected signals of acoustic waves in different media. Ray detection uses the penetrating ability of radiation to matter, by introducing radioactive isotopes into the pipeline, measuring the signal received after the ray passes through the pipeline, reflecting the structure and condition inside the pipeline.
The difference between 2. ultrasonic testing and radiographic testing
1. Detection principle is different
Ultrasonic testing uses the propagation properties of sound waves and can detect some small defects, but it needs to take into account the influence of factors such as the material and paint of the pipeline, as well as the propagation route of ultrasonic waves in the pipeline.
Ray detection uses the penetration ability of rays, which can detect some hidden defects in the pipeline. However, due to the high radiation risk of rays, special protective measures are needed, and when there are obstacles in the pipeline, the detection accuracy may be reduced.
2. Detection efficiency and cost are different.
Ultrasonic testing is more suitable for the detection of pipeline wall thickness, cracks, deformation and other defects, so the speed is fast, the detection efficiency is high, the cost is relatively low, but the accuracy of the results is affected by the level of testing personnel and the quality of the instrument and other factors.
The accuracy of ray detection is high, and hidden defects that cannot be found by ultrasonic detection can be detected. However, due to the limitations of equipment and safety measures, the detection efficiency is relatively low and the cost is relatively high.
3. choose their own detection method
When considering gas pipeline inspection methods, the following factors need to be considered: the type of defect to be detected, the diameter of the pipeline, whether there are obstacles in the pipeline, the time and cost of inspection, etc. According to the specific situation, the choice of ultrasonic testing or radiographic testing, or a combination of the two, can better ensure the safe operation of the pipeline and extend the service life.
[Conclusion]]
This paper briefly introduces the basic principles and practical applications of ultrasonic testing and radiographic testing of gas pipelines, and analyzes the differences between these two methods and their respective advantages and disadvantages. In practical applications, it is very important to choose a suitable detection method, which can better ensure the safe operation of gas pipelines.
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