Detection method of double-metal composite material seabed pipeline circumferential welding seam phased array partitioning method

Abstract

The invention provides a detection method of a double-metal composite material seabed pipeline circumferential welding seam phased array partitioning method. The detection method comprises the following detection steps: 1: placing a probe on a weld welding seam; 2: setting a plurality of reflection bodies on a groove and setting upper and lower time difference diffraction reflection bodies on inner and outer surfaces in the center of the welding seam respectively; 3: setting a plurality of groups of phased array probe covering region probes and a plurality of groups of creeping wave probe covering regions; carrying out monitoring detection on opening defects of upper and lower surfaces; 4: setting two display strip shapes; calibrating on a calibration test block and mounting a scanning device on the calibration test block; carrying out sensitivity calibration on each partitioned zone; 5: carrying out dynamic calibration on the calibration test block and detecting the welding seam; and6: carrying out comprehensive evaluation on the quality of the welding seam. According to the detection method provided by the invention, the difficulty of transverse wave detection of a composite material is overcome and defects with different types of each position are effectively detected; and the field detection efficiency and the detection quantitative precision of welding the seabed pipelinewelding seam are greatly improved and the quality of the welding seam is controlled.

Description

technical field [0001] The invention relates to a detection method of a submarine pipeline, in particular to a detection method of a phased array detection method of a subsea pipeline butt girth weld based on a bimetallic composite material of a partition method. It belongs to the field of marine engineering construction. Background technique [0002] For a long time, the traditional radiographic inspection process has been used in the detection of bimetallic composite submarine pipelines, which is not only inefficient, but also has potential hazards such as radiation pollution. [0003] At present, the subsea pipeline phased array (AUT) detection process for carbon steel materials has been widely used, and the technology and equipment are very mature. If the phased array detection method is used to inspect the butt weld of the bimetal composite submarine pipeline, the inspection efficiency will be at least double that of the traditional ray inspection, and it is very envir...

AI Technical Summary

Problems solved by technology

However, due to the coarse grains of the bimetallic composite material, the anisotropy of the material, and the serious attenuation, the conventional shear wave cannot obtain a good signal-to-noise ratio, and even cannot be detected; if the longitudinal wave test is used, the longitudinal wave cannot be used Secondary wave detection has a large blind area, so it is impossible to achieve full coverage of weld seam detection, and the quantitative accuracy is difficult to guarantee

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