Method for detecting incomplete root penetration of butt weld of thick-walled pipe in ferrite
A technology of butt weld and incomplete penetration, which is applied to the analysis of solids, materials, and instruments using sonic/ultrasonic/infrasonic waves. It can solve the problems of cumbersome operation and incomplete application, and achieve the effect of avoiding missed judgments and accurate judgments.
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[0028] The detection method of this embodiment requires a digital ultrasonic detector, which uses a high-frequency transverse wave oblique probe and a high-frequency longitudinal wave straight probe. For on-site installation or in-service butt girth welding, single-sided welding and double-sided forming can only be performed on one side. Qualitative and quantitative detection of incomplete penetration of the root during detection, the specific steps are as follows:
[0029] (1) Adjust the sensitivity parameters of the high-frequency shear-wave oblique probe according to the standard requirements; use the high-frequency shear-wave oblique probe to find the maximum reflection signal at the part of the root weld that exceeds the standard;
[0030] (2) Use a qualified steel ruler to locate the maximum reflection signal at the exceeding standard in the horizontal direction and vertical depth, and record the detection data, the horizontal distance L1, the vertical depth H1, and the d...
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