Effect of 3D random pitting defects on the collapse pressure of pipe — Part I: Experiment

Wang, Huakun; Yu, Yang; Yu, Jianxing; Duan, Jing-hui; Zhang, Yu; Li, Zhenmian; Wang, Caimei

doi:10.1016/j.tws.2018.04.015

Cited by 76 publications

(20 citation statements)

References 50 publications

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“…Both ends of the pipe are sealed with the flange which is connected to the pressure vessel and hydraulic cylinder with bolts before the buckling test. The pressure vessel is then filled with water and pressurized with a hydraulic pump, which pumps very slowly into the vessel (maximum pressurization speed 2 MPa/s) to achieve quasi-static conditions and avoid strain rate effects [44][45][46][47]. The pressure in the vessel is monitored by a pressure sensor, and the collapse pressure is defined as the peak value before the pressure in the facility suddenly drops when instability of the pipe occurs.…”

Section: Resultsmentioning

confidence: 99%

“…The measuring range of RA7320 is 2.3 m, with the point repeatability accuracy of 0.03 mm and the spatial length accuracy of 0.042 mm. For more information about the device and measuring scheme, refer to the authors' previous work [43,44].…”

Section: Geometric Features Of Pipesmentioning

confidence: 99%

“…mm and the spatial length accuracy of 0.042 mm. For more information about the device and measuring scheme, refer to the authors' previous work [43,44].…”

Section: Geometric Features Of Pipesmentioning

confidence: 99%

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Local Buckling Characteristics of Stainless-Steel Polypropylene Deep-Sea Sandwich Pipe under Axial Tension and External Pressure

Chen

et al. 2021

Energies

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In this paper, the effects of different loading paths of axial tension and external pressure on the collapse pressure of sandwich tubes are studied by experiments and finite element models. The difference of the two loading paths is investigated. Eight experiments were carried out to study the influence of different loading paths on pipeline collapse pressure under the same geometric and material parameters. Parameterization studies have been carried out, and the results are in good agreement with the experimental results. The test and finite element results show that the loading path of external pressure first and then the axial tension (P→T) is more dangerous; the collapse pressure of the sandwich pipe is smaller than the other. Through parametric analysis, the influence of the axial tension and the diameter-to-thickness ratio of the inner and outer pipe on the collapse pressure under different loading paths are studied.

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Section: Resultsmentioning

confidence: 99%

Section: Geometric Features Of Pipesmentioning

confidence: 99%

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Local Buckling Characteristics of Stainless-Steel Polypropylene Deep-Sea Sandwich Pipe under Axial Tension and External Pressure

Chen

et al. 2021

Energies

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“…Wang et al [27] established random corrosion model of steels plates, in which pitting pits were cylindrical, and evaluated the effect of random pitting on galvanized structural steel. In the study of the collapse pressure of cylindrical cabins with random pitting corrosion, Wang et al [28,29] established a model of randomly corroded cylindrical cabins to study the effect of pitting pits on rupture pressure of deep-sea pipeline under external pressure. The cylindrical cabin with random pitting corrosion can be built by this modeling method, but the spherical cabin with random pitting corrosion cannot be built.…”

Section: Numerical Model Of Spherical Electronic Cabins With Local Ra...mentioning

confidence: 99%

Strength Prediction of Spherical Electronic Cabins with Pitting Corrosion

Wang

Zhu

et al. 2022

Metals

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In this paper, strength prediction of spherical electronic cabins with pitting corrosion under external pressure was investigated. The finite element model of a spherical electronic cabin with random pitting was established using self-written code. The effects of the pitting distribution shape, pitting morphology and size on the ultimate buckling load were numerically studied. In addition, the analytical formula for predicting the ultimate load of spherical cabin with random pitting corrosion was proposed and verified by experiments. This study can be used by engineering designers for relevant design and evaluation basis and provides a reference for the development of a new design code for the buckling stability of spherical cabins with pitting corrosion.

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“…In the deep-sea environment, external pressure is the main factor causing corrosion and local buckling in steel pipelines [19,20]. Fan et al [21] studied the instability mechanism of submarine steel pipelines through external pressure tests on full-scale and reducedscale steel pipelines by considering the effects of initial ovality and pitting corrosion defects.…”

Section: Introductionmentioning

confidence: 99%

Buckling Analysis of Corroded Pipelines under Combined Axial Force and External Pressure

Chen

2022

Metals

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Affected by a complex environment, corrosion is a common defect in steel pipelines. Moreover, steel pipelines are subjected to large axial forces during their installation and operation. Corroded deep-sea steel pipelines are prone to local buckling under complex loads. Therefore, in view of this problem, the collapse response of corroded steel pipelines under the combined axial force and external pressure is analyzed in detail. First, a formula for evaluating the collapse pressure of corroded steel pipelines under external pressure and axial force is proposed. Then, the factors affecting the collapse pressure of the steel pipeline are parameterized by using the finite element method. The accuracy of the finite element model is proved by collapse tests of the corroded steel pipeline. As shown in finite element results, the diameter-to-thickness ratio, initial ovality and corrosion defect size have significant effects on the buckling response of a steel pipeline. The collapse pressure of the steel pipeline decreases as the axial force increases. Finally, based on the finite element simulation results, the parameter variables in the evaluation formula are obtained.

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Effect of 3D random pitting defects on the collapse pressure of pipe — Part I: Experiment

Cited by 76 publications

References 50 publications

Local Buckling Characteristics of Stainless-Steel Polypropylene Deep-Sea Sandwich Pipe under Axial Tension and External Pressure

Local Buckling Characteristics of Stainless-Steel Polypropylene Deep-Sea Sandwich Pipe under Axial Tension and External Pressure

Strength Prediction of Spherical Electronic Cabins with Pitting Corrosion

Buckling Analysis of Corroded Pipelines under Combined Axial Force and External Pressure

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