Behavior and damage of a pipe in the presence of a corrosion defect depth of 10% of its thickness and highlighting the weaknesses of the ASME / B31G method

Berrekia, Habib; Benzerga, D.; Haddi, Abdelkader

doi:10.3221/igf-esis.49.58

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…The inclusion that represents the defect is initially assumed to be perfectly spherical [16]. The matrix behaviour subjected to an internal pressure is studied under a pure tension loading [17,18]. Due to the symmetry, only a quarter of body is modelled.…”

Section: Numerical Modelingmentioning

confidence: 99%

Numerical Investigations of Damage Behaviour at the Weld/Base Metal Interface

Talouti

Benzerga

Abdelkader

2022

IJE

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In the present paper, the numerical modelling to predict the interface damage of weld defect in a steel pipeline was studied. This work focused on determination of the maximum operating pressure and the characterisation of mechanical behaviour at a weld-base metal interface. The operating pressure can fluctuate leading to the phenomenon of fatigue and consequently to the failure of pipeline. Experimental investigations were carried out using non-destructive test (NDT) in order to locate and determine size of defects. A bilinear interface decohesion model is used to simulate the damage behaviour considering a stress-relative displacement laws. Numerical simulations based on the finite element method were used to study the influence of size defects and young's moduli ratio on the operating pressure as well as interfacial damage between the weld and base metal. The obtained results showed that the interface damage depending on shape and material properties of defects has an impact on pipeline safety and integrity.

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Section: Numerical Modelingmentioning

confidence: 99%

Numerical Investigations of Damage Behaviour at the Weld/Base Metal Interface

Talouti

Benzerga

Abdelkader

2022

IJE

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“…The dimensions of the structure are: length, radius and thickness. Thus we were able to model the surface defect of the HDPE tube by taking into account the geometry of the defect, the boundary conditions and the mesh [20]. For the simulation, we used the experimental results presented in [19].…”

Section: Numerical Modelingmentioning

confidence: 99%

Repair and rehabilitation of corroded HDPE100 pipe using a new hybrid composite

Regad¹,

Benzerga²,

Berrekia³

et al. 2021

Frattura Ed Integrità Strutturale

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The good management of drinking water begins with a supply network, with a low rate of leakage. Currently, the pipes used in the water transport system are mainly made of polymeric materials, such as HDPE. The corrosion degradation of this type of pipe has received a lot of attention from the drinking water supply companies. It is therefore important to understand the effect of pressure on an HDPE pipe with a surface defect. To answer this problem, we will first study the mechanical behavior at failure of HDPE pipes in the presence of a surface defect using a finite element method. For the rehabilitation of pipe in presence of surface defect, we try to use a new composite. This new laminated composite is reinforced with a natural organic load. It is obtained from a laminated composite woven by incorporating a natural non-polluting organic load (granulates of date cores) which becomes hybrid composite. The new economical hybrid composite material is made of an organic matrix containing methyl methacrylate, a woven reinforcement including a reinforcing glass fiber and a fabric perlon having an absorbing role. The textile reinforcement made up of several folds reinforcing laid out according to the orientations (90, 452, and 0). A numerical simulation with the ANSYS Workbench software is carry out to study the behavior of the HDPE pipe with surface defect and with defect repaired by the new hybrid composite material in the form of rings to consolidate the cracked area of the tube. The numerical results will allow us to decide on a real practical use of the new hybrid composite.

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“…There is quite a significant variation of the theoretical burst pressure between the different semi-empirical models for the same test specimen. This is related to the assumptions of remaining strength function ( ) and flow stress material ( ), which leads to a variation in burst pressure even for the same defect pipe.In most of the semi empirical model the defect width in pipeline is not accounted, however some results found the influence of width on final burst pressure [9,24,34]. In addition to that the complicated geometry of corroded region to represent in analysis is quite complicated and leads in the variation in experimental and theoretical results.…”

Section: Remaining Strength Of Corroded Pipelinesmentioning

confidence: 99%

Prediction of the burst pressure for defective pipelines using different semi-empirical models

Budhe

Barros

2020

Frattura Ed Integrità Strutturale

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The main aim of this work is to predict the theoretical burst pressure of defective pipelines using different semi-empirical models and compare them with the hydrostatic test results. A new methodology was formulated with accounting for a minimum thickness (weakest section of the pipe) over the length of the pipe to predict the most conservative burst pressure. With a simple analytical expression, a reasonable accuracy and more conservative burst pressure can be obtained for any arbitrary defect shapes. A variation of burst pressure was found between theoretical prediction and hydrostatic burst test results with respect to the different semi-empirical models even for the same corroded defects. Different defect geometry shape and pipe material conditions are the possible causes for variation in the burst pressure between the semi-empirical models, so a careful selection of these parameters is necessary. The proposed methodology predicted a more conservative burst pressure for all arbitrary defects shapes and can predict reasonably accurate values if it accounts for the axial stress.

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Behavior and damage of a pipe in the presence of a corrosion defect depth of 10% of its thickness and highlighting the weaknesses of the ASME / B31G method

Cited by 4 publications

References 8 publications

Numerical Investigations of Damage Behaviour at the Weld/Base Metal Interface

Numerical Investigations of Damage Behaviour at the Weld/Base Metal Interface

Repair and rehabilitation of corroded HDPE100 pipe using a new hybrid composite

Prediction of the burst pressure for defective pipelines using different semi-empirical models

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