Effect of Operating Degradation in Arctic Conditions on Physical and Mechanical Properties of 09Mn2Si Pipeline Steel

Panin, S. V.; Maruschak, Pavlo; Власов, И. В.; Syromyatnikova, A. S.; Bol'shakov, A. M.; Berto, Filippo; Prentkovskis, Olegas; Ovechkin, B. B.

doi:10.1016/j.proeng.2017.01.117

Cited by 25 publications

(14 citation statements)

References 16 publications

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“…The degradation processes in 09Mn2Si steel of the “Kysyl-Syr-Mastakh-Yakutsk” gas main (Russia, Yakutia) operated in Far North climatic conditions did result in a minor variation in the mechanical properties [12]. In doing so, regardless of the slight increase of the latter during the long-term operation, basic mechanical properties are illustrated by a straight line on the graph, since they did not go beyond the limits recommended by the industrial standards, see Figure 1b.…”

Section: Degradation Processes In Gas Main Steelsmentioning

confidence: 99%

“…A generalized scheme of the gas main steel degradation: ( a ) In moderate climate conditions (Ukraine) [8]; ( b ) in conditions of the Far North (Yakutia, Russia) [12]; KCV —impact toughness; K IC —fracture toughness; σ us —ultimate strength; σ ys —yield stress; HV —hardness; H µ —microhardness; δ —relative elongation; φ— relative narrowing.…”

Section: Figurementioning

confidence: 99%

“…These processes possess a stage pattern, however, they can significantly vary in various climatic zones. In our previous studies, the degradation of pipe steels exploited in Ukraine and Yakutia (Russia) [8,12,13] was investigated. The regularities of their mechanical properties degradation were summarized in a set of schemes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical Properties of Gas Main Steels after Long-Term Operation and Peculiarities of Their Fracture Surface Morphology

et al. 2019

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Regularities of steel structure degradation of the “Novopskov-Aksay-Mozdok” gas main pipelines (Nevinnomysskaya CS) as well as the “Gorky-Center” pipelines (Gavrilovskaya CS) were studied. The revealed peculiarities of their degradation after long-term operation are suggested to be treated as a particular case of the damage accumulation classification (scheme) proposed by prof. H.M. Nykyforchyn. It is shown that the fracture surface consists of sections of ductile separation and localized zones of micro-spalling. The presence of the latter testifies to the hydrogen-induced embrittlement effect. However, the steels under investigation possess sufficiently high levels of the mechanical properties required for their further safe exploitation, both in terms of durability and cracking resistance.

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Section: Degradation Processes In Gas Main Steelsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Mechanical Properties of Gas Main Steels after Long-Term Operation and Peculiarities of Their Fracture Surface Morphology

et al. 2019

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“…The microstructural degradation, revealed through hardness measurements, exerts only slight effects under static tension. It was reported that values of the basic mechanical properties of the steel have not changed when compared with the emergency reserve values (Panin et al, 2017(Panin et al, , 2019. Several studies have investigated the effect of the addition of Zr and Al as deoxidizers on the size, distribution, and composition of inclusions (Rodionova et al, 2005a,b;Li et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Influence of Non-metallic Inclusions on Corrosive Properties of Polar Steel

Sun

2021

Front. Mater.

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Polar steel requires excellent toughness and corrosion resistance for breaking icy surfaces in low-temperature seawater environments. In this study, the effect of inclusions on the corrosion resistance of polar steel was examined. In the experiments conducted, the composition and morphology of the inclusions in steel were controlled using different deoxidation methods during steel refining. The morphology and composition of the corrosion-resistant active inclusions were analyzed using scanning electron microscopy and energy dispersive spectroscopy. The corrosion resistance of polar steel was determined by measuring the saturation current density of the anodic dissolution of steel in a corrosive medium via an electrochemical method. The corrosion resistance under simulated seawater was also investigated under laboratory conditions. It was found that as the ratio of Al/Mg approaches the stoichiometric composition of the spinel (2.3–2.5), the inclusions become less active; as the ratio increases further, the corrosion-resistant activity increases due to the formation of MgAl2O4⋅CaO complexes, leading to an increase in local stress around the inclusions. If steel is deoxidized with Zr–Ti, small Zr–Ti complex oxides form in the steel, providing nucleation particles for the precipitation of spheroidized and uniformly distributed MnS. Therefore, steel deoxidized with Zr–Ti has better seawater corrosion resistance than Al-deoxidized steel.

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“…Erosive wear is one of the factors that reduce the residual life of pipelines. The erosive wear of the pipe wall is especially dangerous for the pipelines that have been operated for more than 35…40 years (Maruschak et al 2013(Maruschak et al , 2014(Maruschak et al , 2016a(Maruschak et al , 2016b(Maruschak et al , 2018Vilkys et al 2018;Poberezhnyi et al 2016;Poberezhny et al 2017;Lytvynenko et al 2018;Panin et al 2017). Therefore, a comprehensive study of the erosive wear of the pipe wall in gas mains is particularly relevant.…”

Section: Introductionmentioning

confidence: 99%

Modeling Computational Fluid Dynamics of Multiphase Flows in Elbow and T-Junction of the Main Gas Pipeline

Doroshenko

Zapukhliak

et al. 2019

Transport

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The research was performed in order to obtain the physical picture of the movement of condensed droplets and solid particles in the flow of natural gas in elbows and T-junctions of the linear part of the main gas pipeline. 3D modeling of the elbow and T-junction was performed in the linear part of the gas main, in particular, in places where a complex movement of multiphase flows occurs and changes its direction. In these places also occur swirls, collisions of discrete phases in the pipeline wall, and erosive wear of the pipe wall. Based on Lagrangian approach (Discrete Phase Model – DPM), methods of computer modeling were developed to simulate multiphase flow movement in the elbow and T-junction of the linear part of the gas main using software package ANSYS Fluent R17.0 Academic. The mathematical model is based on solving the Navier–Stokes equations, and the equations of continuity and discrete phase movement closed with Launder–Sharma (k–e) two-parameter turbulence model with appropriate initial and boundary conditions. In T-junction, we simulated gas movement in the run-pipe, and the passage of the part of flow into the branch. The simulation results were visualized in postprocessor ANSYS Fluent R17.0 Academic and ANSYS CFD-Post R17.0 Academic by building trajectories of the motion of condensed droplets and solid particles in the elbow and T-junction of the linear part of the gas main in the flow of natural gas. The trajectories were painted in colors that match the velocity and diameter of droplets and particles according to the scale of values. After studying the trajectories of discrete phases, the locations of their heavy collision with the pipeline walls were found, as well as the places of turbulence of condensed droplets and solid particles. The velocity of liquid and solid particles was determined, and the impact angles, diameters of condensed droplets and solid particles in the place of collision were found. Such results provide possibilities for a full and comprehensive investigation of erosive wear of the elbow and T-junction of the linear part of the gas main and adjacent sections of the pipeline, and for the assessment of their strength and residual life.

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Effect of Operating Degradation in Arctic Conditions on Physical and Mechanical Properties of 09Mn2Si Pipeline Steel

Cited by 25 publications

References 16 publications

Mechanical Properties of Gas Main Steels after Long-Term Operation and Peculiarities of Their Fracture Surface Morphology

Mechanical Properties of Gas Main Steels after Long-Term Operation and Peculiarities of Their Fracture Surface Morphology

Influence of Non-metallic Inclusions on Corrosive Properties of Polar Steel

Modeling Computational Fluid Dynamics of Multiphase Flows in Elbow and T-Junction of the Main Gas Pipeline

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