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Metals 2018, 8(5), 346; https://doi.org/10.3390/met8050346

Evaluation of Failure Pressure for Gas Pipelines with Combined Defects

1
Vilpros Pramonė, UAB, Vilniaus g. 11, Izabelinė LT-14200, Lithuania
2
Department of Mechanical and Material Engineering, Faculty of Mechanics, Vilnius Gediminas Technical University, J. Basanavičiaus g. 28, Vilnius LT-03224, Lithuania
3
Department of Mobile Machinery and Railway Transport, Faculty of Transport Engineering, Vilnius Gediminas Technical University, Plytinės g. 27, Vilnius LT-10105, Lithuania
4
Department of Applied Mechanics, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Saulėtekio al. 11, Vilnius LT-10223, Lithuania
5
Department of Industrial Automation, Ternopil National Ivan Pul’uj Technical University, Rus’ka str. 56, Ternopil 46001, Ukraine
*
Author to whom correspondence should be addressed.
Received: 11 March 2018 / Revised: 7 May 2018 / Accepted: 8 May 2018 / Published: 11 May 2018
(This article belongs to the Special Issue Mechanical Behavior of High-Strength Low-Alloy Steels)
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Abstract

The paper presents the study of the influence of mechanical damage on the safe operation of gas transmission pipelines. The main types of pipeline damage with the actual parameters and their influence on the operational parameters are analysed. The damaged fractures of the section of the pipeline Kaunas (Lithuania)–Kaliningrad (Russia) were investigated in the laboratory. The main operational characteristics and the structure of the pipeline’s metal after the period of long-term operation were determined using various research and experimental methods. The influence of the pipeline’s damage was modelled by using the Finite Element Method and the ANSYS code. The predictions of the failure pressure were made, taking into consideration the actual properties of the pipeline’s metal. Techniques including the hardness and microhardness measurement, chemical analysis, the impact strength test, and metallography analysis with an optical microscope, were used in the experimental study. View Full-Text
Keywords: combined defect; gas pipeline; mechanical damage; failure pressure; finite element method combined defect; gas pipeline; mechanical damage; failure pressure; finite element method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Vilkys, T.; Rudzinskas, V.; Prentkovskis, O.; Tretjakovas, J.; Višniakov, N.; Maruschak, P. Evaluation of Failure Pressure for Gas Pipelines with Combined Defects. Metals 2018, 8, 346.

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