Impact Toughness of the Gas Main Steel after Long-Term Operation under Extreme North Conditions

2019 ◽  
Vol 2019 (4) ◽  
pp. 484-486
Author(s):  
A. M. Bol’shakov ◽  
A. V. Burnashev
Keyword(s):  
Impact Toughness ◽  
Term Operation ◽  
Gas Main ◽  
Extreme North

Physical metallurgy conditions for retaining the load-carrying ability of the gas-main pipeline metal during long-term operation

2009 ◽  
Vol 2009 (4) ◽  
pp. 314-321 ◽  
Author(s):  
M. M. Kantor ◽  
V. N. Voronin ◽  
V. A. Bozhenov ◽  
V. G. Antonov ◽  
Yu. M. Sharygin
Keyword(s):  
Physical Metallurgy ◽  
Main Pipeline ◽  
Term Operation ◽  
Gas Main ◽  
Gas Main Pipeline ◽  
Load Carrying

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

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 491 ◽  
Author(s):  
Volodymyr Hutsaylyuk ◽  
Pavlo Maruschak ◽  
Ihor Konovalenko ◽  
Sergey Panin ◽  
Roman Bishchak ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Surface ◽  
Damage Accumulation ◽  
Classification Scheme ◽  
Steel Structure ◽  
Term Operation ◽  
Gas Main ◽  
Structure Degradation ◽  
Main Pipelines

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.

scholarly journals Influence of long-term operation on structure, fatigue durability and impact toughness of 09Mn2Si pipe steel

2017 ◽  
Vol 5 ◽  
pp. 401-408
Author(s):  
S.V. Panin ◽  
I.V. Vlasov ◽  
P.O. Marushchak ◽  
A.V. Eremin ◽  
A.V. Byakov ◽  
...  
Keyword(s):  
Impact Toughness ◽  
Pipe Steel ◽  
Term Operation ◽  
Fatigue Durability

scholarly journals Condition evaluation of steel X65 in one of the sections of “Soyuz” gas main after long-term operation

2018 ◽  
Vol 62 (3) ◽  
pp. 78-82 ◽  
Author(s):  
P. Maruschak ◽  
R. Bishchak ◽  
O. Maruschak ◽  
D. Draganovská ◽  
A. Pylypenko
Keyword(s):  
Environmental Factors ◽  
Pipe Steel ◽  
Pipe Wall ◽  
Structural Degradation ◽  
Term Operation ◽  
Gas Main ◽  
Condition Evaluation ◽  
Deformation And Fracture ◽  
Fracture Processes

Abstract The basic regularities in deformation and fracture of pipe steel X65 are revealed by testing specimens from the pipe fragment cut during the repair of the “Soyuz” gas main after 30 years of operation. It is shown that the pipe steel slightly changes its properties when the gas main is operated under the influence of working stresses and environmental factors. Structural degradation and micro-defects accumulated in the pipe wall were scattered, indicating that the material retains sufficient plasticity that allows it to resist fracture processes and the nucleation of macrocracks.

scholarly journals The corrosion damage mechanisms of the gas pipelines in the Republic of Sakha (Yakutia)

2019 ◽  
Vol 121 ◽  
pp. 03002
Author(s):  
Alexander Ivanov ◽  
Konstantin Bolshev ◽  
Alexander Bolshakov ◽  
Aytalina Syromyatnikova ◽  
Anisiy Alexeev ◽  
...  
Keyword(s):  
Corrosion Damage ◽  
Main Pipeline ◽  
Working Capacity ◽  
Term Operation ◽  
Long Period ◽  
Gas Main ◽  
Gas Main Pipeline ◽  
The Republic ◽  
Near Future

The article provides examples of critical damage to a long-running gas pipeline on the territory of the Republic of Sakha (Yakutia), which arose as a result of the development of corrosion processes, discusses the mechanisms and scenarios for the development of corrosion damage in the cryolithozone conditions. Considering the processes and mechanisms, they continue for a long period of time., an increase in the number of damages to a gas main pipeline due to corrosive degradation is expected in the near future. The stage of diffuse damage during long-term operation is confirmed by the increasing loss of working capacity due to corrosion damage in the last 25 years of the pipeline operation.

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