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The Method of Detecting Weld Seam of Thin-wall Small-diameter Pipe Using Phased Array Ultrasonic Combination Technology

A technology detection, phased array technology, applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, can solve the problems of missed detection and misjudgment, difficult detection, delaying the progress of the project, etc., to achieve the probability of missed evaluation and misjudgment The effect of low, low human factors and high quantitative accuracy

Active Publication Date: 2017-11-03
田国良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Radiographic inspection is characterized by being sensitive to volume-type defects (such as pores), unclear to harmful area-type defects (such as cracks, lack of fusion), and easy to miss inspection. The advantage is that the defect display is intuitive, but there are radiation, Pollution, harmful to the human body, cross-operation cannot be carried out, test results cannot be issued on site, the detection efficiency is low, and the construction schedule is easily affected
[0006] Conventional ultrasonic testing is characterized by being sensitive to dangerous area-type defects, not sensitive to volume-type defects, easy to miss detection, no radiation during the detection process, can issue detection results on site, high detection efficiency, and can carry out cross-operation. The disadvantages are Using single-angle acoustic beam detection, the detection results are not displayed in the form of images, but in the form of A-scans, which is not intuitive, and the stored data cannot be played back dynamically. The technical level of the detection personnel is high, and the detection results are greatly affected by human factors. , Omissions and misjudgments often occur, which affect the quality of the project, especially for thin-walled small-diameter pipe welds with a wall thickness greater than or equal to 3.5mm and less than or equal to 7mm. It is very difficult to use single-angle primary wave and secondary wave detection. Therefore, the welding seams of thin-walled small-diameter pipes in this range are basically inspected by radiographs, which aggravates the inspection task, delays the progress of the project, and makes it difficult to ensure that the project is completed on schedule.

Method used

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  • The Method of Detecting Weld Seam of Thin-wall Small-diameter Pipe Using Phased Array Ultrasonic Combination Technology
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1 is a simulated test piece of a pipe whose specification is Φ32mm×3.5mm. In the butt weld of the simulated test piece, there are defects of incomplete penetration of the root and pores. The butt weld parameters, defect parameters and reference testing standards of the simulated specimens are shown in Table 1.

[0016] Table 1 Z32-T3.5-4 pipe simulated defect test piece and defect design parameters

[0017]

[0018] The phased array ultrasonic combination technology is used to detect the weld seam of thin-walled small-diameter pipes with a wall thickness greater than or equal to 3.5mm and less than or equal to 7mm. On-site testing is carried out, and the test results are evaluated and the process of issuing a test report is completed.

[0019] The phased array ultrasound equipment is an ISONIC-PA-2009 phased array equipment with multiple scanning and three-dimensional image display functions.

[0020] The phased array probe is a special phased array probe f...

Embodiment 2

[0059] Example 2 is a pipe simulation test piece with a specification of Φ42mm×7mm, and there are cracks, unfused grooves and air hole defects in the butt weld of the simulated test piece. The butt weld parameters, defect parameters and reference testing standards of the simulated specimens are shown in Table 2.

[0060] Table 2 Z42-T7-1 pipe simulated defect test piece and defect design parameters

[0061]

[0062] The phased array ultrasonic combination technology is used to detect the weld seam of thin-walled small-diameter pipes with a wall thickness greater than or equal to 3.5mm and less than or equal to 7mm. On-site testing is carried out, and the test results are evaluated and the process of issuing a test report is completed.

[0063] The phased array ultrasound equipment is an ISONIC-PA-2009 phased array equipment with multiple scanning and three-dimensional image display functions.

[0064] The phased array probe is a special phased array probe for small-diamet...

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Abstract

The invention proposes a method for detecting weld seams of thin-walled small-diameter pipes by using phased array ultrasonic combination technology. The phased array ultrasonic combination technology is used to detect the weld seam of thin-walled small-diameter pipes with a wall thickness greater than or equal to 3.5mm and less than or equal to 7mm. On-site testing is carried out, and the test results are evaluated and the process of issuing a test report is completed. The method of the invention is simple and practical to operate, has no radiation, no pollution, high detection efficiency, the detection result is displayed in the form of a three-dimensional image, is intuitive and easy to understand, has high quantitative accuracy, is less affected by human factors, and has low probability of missed evaluation and misjudgment. It is suitable for application as a method for detecting weld seams of thin-walled small-diameter pipes.

Description

technical field [0001] The invention relates to a thin-wall small-diameter pipe weld seam ultrasonic detection process, in particular to a method for detecting thin-wall small-diameter pipe weld seam by using phased array ultrasonic combination technology. Background technique [0002] According to the "National Medium and Long-Term Science and Technology Development Plan (2006-2020)", early warning and rescue of major production accidents in the field of public safety are priority topics. Pressure equipment includes various boilers, pressure vessels and pressure pipes, etc., which are important production equipment and are closely related to national economic production and people's daily life. However, pressure-bearing equipment often has the characteristics of high temperature, high pressure and toxic media. Once an accident occurs, the consequences will be extremely serious. In order to avoid possible quality accidents, a large number of non-destructive testing technolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/06
Inventor 田国良
Owner 田国良