SMT method and structure for radiographic detection of pipe welds

Abstract

The invention discloses a patch method for radiographic detection, in particular to a patch method for radiographic detection of pipe welds. The present invention provides a patch method for segmentally accurate tube weld radiographic detection, comprising the following steps: A, making segmented bands, using the marking on the segmented bands to mark the segmented bands as n sections, where n is the transmission The number of times, the length of each section is L / n, and L is the outer circumference of the steel pipe to be inspected; B. Set the produced segmented belt around the outer circumference of the steel pipe to be inspected, and the segmented belt is arranged next to the weld; C. , Place the penetrometer and various marks on the side of the pipe wall, attach the dark bag box to the weld and cover the section to be inspected, the penetrometer and various marks, so that the inside of the dark bag box The length direction of the film is consistent with the circumferential direction of the welding seam, and the backscattering lead plate is attached to the dark bag box. Segments are marked with segmented bands and markers, so the images generated during multiple transilluminations are more accurately correlated, improving efficiency and improving the quality and accuracy of negatives.

Description

technical field [0001] The invention relates to a patch method for radiographic detection, in particular to a patch method for radiographic detection of pipe welds. In addition, the present invention also relates to a patch structure for radiographic detection, especially a patch structure for radiographic detection of pipe welds. Background technique [0002] In the metal non-destructive testing radiographic flaw detection process, it is a necessary process to attach the intensifying screen, the marking lead, the penetrometer, and the film to the pipe wall, so that the ray passes through the weld after being emitted from the source, and produces potential damage on the film. Finally, through developing, fixing and other processes, the image is clearly displayed, which is convenient for naked eye observation. [0003] After calculating the transillumination parameters, before the transillumination, the conventional method of patching is: 1. Use the clock positioning method,...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of the above method are: 1. When using a tape measure to locate the clock, because the tape measure is elastic and extensible, it is not convenient to locate on the circular weld; 2. When fixing the film with a magnet, consider reducing the backscattering effect. Therefore, try to fix the magnets on the 4 corners of the film as much as possible. Doing so can not guarantee the tightness of the whole film and affects the quality of the film; Power consumption, low efficiency

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