Experimental and numerical analysis of non-contact magnetic detecting signal of girth welds on steel pipelines

He, Guoxi; He, Tengjiao; Liao, Kexi; Deng, Shasha; Chen, Di

doi:10.1016/j.isatra.2021.06.006

Cited by 20 publications

(7 citation statements)

References 31 publications

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“…He et al studied the variation of non-contact magnetic signals in 0.1 m -1.0 m detection height by a hydraulic pressure test. The results indicate that the non-contact magnetic signal exhibits a second-order exponential relationship with the detection height [7]. Xu et al tested the magnetic field strength and gradient in a defective Q345 steel plate sample.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Quantitative Relationship between the Non-contact Magnetic Signal and Detection Height of Ferromagnetic Pipelines

He,

Tang,

Liao

et al. 2024

J. Phys.: Conf. Ser.

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The non-contact magnetic detection technology has good application prospects in the detection of buried steel pipelines. However, the variation of non-contact magnetic signal and measured height is unknown. The application of the technology in pipeline burial inspection is restricted. Therefore, this article conducts non-contact magnetic signal experimental testing on full-size steel pipelines. The collection method, pipe diameter, internal pressure, measurement height, and the non-contact magnetic signal are quantitatively analyzed. And the propagation factor f G was defined to quantify the degree of influence of measurement height on the non-contact magnetic signal. The results indicate that when the measurement height increases from 0.1 m to 2.0 m, the variation amplitude of the magnetic gradient modulus obtained by the parallel acquisition method is the largest, with a change rate of - 0.35. The amplitude and linear rate of change of the propagation factor f G increase with the pipe diameter and internal pressure. The amplitude and linear rate of change of the propagation factor f G increase with the pipe diameter and internal pressure. In the range of pipe diameters from 355.6 mm to 1016 mm, the amplitude of f G variation is 0.53, and the rate of change is 0.26. Furthermore, the amplitude of f G change due to a unit increase in internal pressure is 0.022, with a corresponding rate of change of 0.0114.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Quantitative Relationship between the Non-contact Magnetic Signal and Detection Height of Ferromagnetic Pipelines

He,

Tang,

Liao

et al. 2024

J. Phys.: Conf. Ser.

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“…This model allowed for a quantitative analysis of the three components of magnetic flux density within the weld under varying stress conditions and at different detection heights. [12]. He established a calculation model for the attenuation of spatial magnetic signals in steel pipelines with distance, and formed a magnetic signal correction method at different heights [13].…”

Section: Introductionmentioning

confidence: 99%

Study on the Strengthening Effect of Excitation Magnetic Field on Stress-Induced Magnetic Signal of X80 Steels

He,

Liao,

Liao

et al. 2024

J. Phys.: Conf. Ser.

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Weak magnetic excitation stress detection has good engineering application prospects in the pipeline non-destructive testing field. To obtain the quantitative variation law between the excited stress-induced magnetic signal and the axial stress value of X80 steel, an axial tensile experimental test of X80 steel under weak magnetic excitation is conducted in this paper. The enhancing effect of the excitation magnetic field on the sensitivity of stress-induced magnetic signals has been quantitatively analyzed. The results indicate that the value of normal magnetic flux density B z increases by 24 times when the excitation magnetic field reaches 600 A/m. Within the scope of 400 A/m to 700 A/m, the excitation magnetic field of 400 A/m has the best excitation effect on X80 steel.

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“…Corrosion failure of pipelines has always been a concern in the pipeline transportation industry [1][2][3][4][5]. A total of 25% of natural-gas-gathering pipelines suffered corrosion failure in the past 30 years according to the Pipeline and Hazardous Materials Safety Administration database [6], while 9% of natural-gas-gathering pipelines of the China National Petroleum Corporation experienced corrosion failure [7].…”

Section: Introductionmentioning

confidence: 99%

Localised corrosion failure of an L245N pipeline in a CO₂–O₂–Cl⁻ environment

Leng

Tian

Liao

et al. 2023

Corrosion Engineering, Science and Technology

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Multicomponent thermal fluid flooding has become a widely used and very effective heavy-oil recovery technology, but the harsh CO 2 -O 2 -Cl − environment can lead to serious corrosion perforation failure of the pipeline. Therefore, the influence of O 2 content and main controlling factors on corrosion perforation were investigated through a weight-loss experiment, corrosion defect test, characterization and grey correlation method. The results showed that, with the increase in O 2 content, the general corrosion rate and localized corrosion rate increased. The uneven protection performance of the product after the addition of O 2 was found to be the key cause of localized corrosion. In addition, the synergistic effect of O 2 -Cl − promoted the lateral and longitudinal expansion of pits. The results of the grey correlation showed that the temperature (30-120 °C) had a greater impact on localized corrosion compared with the content of O 2 (0-0.045 MPa) and Cl − (0-16,000 mg/L).

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Experimental and numerical analysis of non-contact magnetic detecting signal of girth welds on steel pipelines

Cited by 20 publications

References 31 publications

Experimental Study on the Quantitative Relationship between the Non-contact Magnetic Signal and Detection Height of Ferromagnetic Pipelines

Experimental Study on the Quantitative Relationship between the Non-contact Magnetic Signal and Detection Height of Ferromagnetic Pipelines

Study on the Strengthening Effect of Excitation Magnetic Field on Stress-Induced Magnetic Signal of X80 Steels

Localised corrosion failure of an L245N pipeline in a CO₂–O₂–Cl⁻ environment

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Experimental and numerical analysis of non-contact magnetic detecting signal of girth welds on steel pipelines

Cited by 20 publications

References 31 publications

Experimental Study on the Quantitative Relationship between the Non-contact Magnetic Signal and Detection Height of Ferromagnetic Pipelines

Experimental Study on the Quantitative Relationship between the Non-contact Magnetic Signal and Detection Height of Ferromagnetic Pipelines

Study on the Strengthening Effect of Excitation Magnetic Field on Stress-Induced Magnetic Signal of X80 Steels

Localised corrosion failure of an L245N pipeline in a CO2–O2–Cl− environment

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Localised corrosion failure of an L245N pipeline in a CO₂–O₂–Cl⁻ environment