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

A technology for composite materials and submarine pipelines, which is applied in the direction of material analysis, analysis materials, and measuring devices using sound waves/ultrasonic waves/infrasonic waves, which can solve problems such as undetectable, attenuation, and difficulty in ensuring quantitative accuracy, so as to avoid radiation hazards and improve The effect of detecting efficiency and improving laying efficiency

Inactive Publication Date: 2018-12-11
OFFSHORE OIL ENG
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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

Method used

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

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Embodiment Construction

[0025] Such as figure 1 As shown, the selected pipeline size is: 10”x18.9mm, the groove type is: J-shaped groove, the detection material is bimetallic composite material, the material of carbon steel base material 11 is: API 5L X65, and the inner lining layer 5 The thickness is: 3mm stainless steel, the material of the weld filling area is: nickel-based 625, and the metallurgical bonding is used for detection within 100mm of the pipe end. The specific steps of the detection are as follows:

[0026] The first step: if figure 1 As shown, the probe is placed on the upper surface 1 of the weld, and the lower surface 2 of the weld is a non-probe placement surface. According to the form of the weld groove, several weld partitions are respectively set on the weld groove surface 4 (this embodiment It is: the first weld zone 6, the second weld zone 7, the third weld zone 8, the fourth weld zone 9, the fifth weld zone 10), wherein the height of several weld zones is controlled at 1- 3...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/26G01N29/30
CPCG01N29/046G01N29/262G01N29/30
Inventor 陈亮吴员张志宽尤卫宏张天江孙钟姜华陈昌俊常宇张卫东李睿尧张俊杰裴彪胡卫震曹雷徐振
Owner OFFSHORE OIL ENG
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