Structural Degradation of the Welded Joint of the Gas Main after a Long-Term Operation in Sub-Acid Soil

All-Russian research-to-practice conference "Ecology and safety in the technosphere"

生态环境科学

Maruschak, P.O.^1 ; Bishchak, R.T.^2 ; Maruschak, O.V.^2 ; Panin, S.V.^3,4

Ternopil National Ivan pul'Uj Technical University, Ruska 56 str., Ternopil

46001, Ukraine^1

Ivano-Frankivsk National Technical University of Oil and Gas, Karpatska 15 str., Ivano-Frankivsk

76000, Ukraine^2

Institute of Strength Physics and Materials Sciences SB RAS, Tomsk

634021, Russia^3

National Research Tomsk Polytechnic University, 30, Lenin Avenue, Tomsk

634050, Russia^4

关键词: Acid soils;    Defect accumulation;    Gas mains;    Mechanical degradation;    Operating time;    Structural degradation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/115/1/012046/pdf
DOI  :  10.1088/1755-1315/115/1/012046

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The authors investigated the main regularities in the structural and mechanical degradation of steel and a welded joint of the "Soyuz" gas main in operation. It is established that the defect accumulation kinetics in welds are determined both by technological disruptions in their manufacture and by hydrogenation of the weld during a long operating time. A weakening of the mechanical properties of the weld after a prolonged operation is shown, which in some cases led to the appearance of cracks and fracture of the gas main.