Determination of the stressed state of main pipelines in the zones of circular welds

Osadchuk, V. A.; Banakhevych, Yu. V.; Ivanchuk, O. O.

doi:10.1007/s11003-006-0078-5

Cited by 6 publications

(6 citation statements)

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“…The obtained results of the study were processed using the calculation-experimental method [21], taking into account the refined methodology [25].…”

Section: Procedurs and Resultsmentioning

confidence: 99%

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Estimation of residual stresses for multi-layer circumferential welds of oil and gas pipelines

Kychma¹,

Predko²

2019

Diagnostyka

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The article presents results of investigation of residual stresses for multi-layer circumferential welds of oil and gas pipelines. The research was carried out on a designed and manufactured testing equipment for the experimental determination of the stress state parameters in the zone of multi-layer welded joints of pipe segments with the external diameter of 1020 mm and the wall thicknesses of 9.5 mm, of 14 mm, and of 22 mm which were made of carbon steels of different quality (13G1S, 13G1SU, 17G1S and 17G1SU). Determination of residual stresses in the zone of multi-layered circumferential welds of pipe segments was carried out by means of the method by the electronic speckle-interferometry and by the method of magnetoelasticity. On the basic of analysis of the obtained graphic dependences, the recommendations for engineering practice are suggested.

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“…The obtained results of the study were processed using the calculation-experimental method [21], taking into account the refined methodology [25].…”

Section: Procedurs and Resultsmentioning

confidence: 99%

“…Theoretical foundations of the calculationexperimental method for determining the residual technological stresses in welds are considered in [21]. The peculiarities of the application of the calculation-experimental method for the determination of the stress-strain state of welded joints using the electromagnetic method are given in [22].…”

Section: Introductionmentioning

confidence: 99%

Estimation of residual stresses for multi-layer circumferential welds of oil and gas pipelines

Kychma¹,

Predko²

2019

Diagnostyka

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“…actual situation in the terrain, etc. [30]. In general, the described procedure can be characterized as a component of the pipeline integrity management system [31].…”

Section: All Defectsmentioning

confidence: 99%

Defects identification of the main gas pipelines

Banakhevych

2019

jhpe

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This paper describes a typical case of diagnosing and determining the causes of the formating of longitudinal cracks on the outer surface of the pipe, analyzes the current state of diagnosis of main gas pipelines. There is shown the importance of timely and correct response to diagnostic results. There is considered the experience in carrying out measures to optimize the repair processes of main gas pipelines by clearly establishing the timing of both evaluating the results of internal pipe diagnostics and the formating of repair plans, substantiating the criteria for choosing defects for repair and establishing a unified approach to theprocess, including technical documentation.

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“…The formulation and solution of the inverse problems is based on the so-called conventional-plastic strain hypothesis [ 21 , 22 ] implying the base material of a solid to be elastic, while the expected zone of residual stress distribution exhibits specific elastic–plastic behavior so that the total strain can be represented in the following form: where is the total strain tensor, is the tensor of elastic strains occurring within the entire solid, and denotes the tensor of incompatible strain [ 23 ] distributed within the area affected by the impacts causing the residual stress–strain state. This approach has been efficiently employed for the analysis of residual stresses due to welding residual strains in infinite layers with rectilinear and circular welds [ 24 , 25 ], butt-welded cylindrical vessels [ 26 , 27 ], and rectangular plates [ 28 ]. Special attention in the latter paper was given to the end effects in the butt-welded rectangular plate by performing the exact analysis based on the direct integration method [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Axisymmetric residual stresses in a solid cylinder of finite length

Postolaki

Tokovyy

2022

J Eng Math

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A solution technique is presented for the determination of residual stresses in a finite-length solid cylinder subject to non-uniform axisymmetric distributions of incompatible residual strains. The problem is reduced to the sequential solving of three individual problems: a problem on the determination of residual stresses in an infinitely long cylinder (the basic state) and two auxiliary problems for evaluating the stresses induced by the end-face effects (the disturbed states). The variational method of homogeneous solutions is implemented in order to determine the disturbed states within the framework of two latter problems. The solution technique is verified numerically for typical distribution profiles of incompatible strains depending on both the radial and axial coordinates. The approach can be used to evaluate residual stresses in a solid cylinder of finite length due to the intense thermal treatment.

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Determination of the stressed state of main pipelines in the zones of circular welds

Cited by 6 publications

References 0 publications

Estimation of residual stresses for multi-layer circumferential welds of oil and gas pipelines

Estimation of residual stresses for multi-layer circumferential welds of oil and gas pipelines

Defects identification of the main gas pipelines

Axisymmetric residual stresses in a solid cylinder of finite length

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