PSI - Issue 20

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2018) 000–000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 20 (2019) 259–264

1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) The corrosion damage mechanisms of the gas pipelines in the Republic of Sakha (Yakutia) Aytalina Syromyatnikova a , Alexander Bolshakov a , Alexander Ivanov a, *, Anisiy Alexeev a , Konstantin Bolshev a , Yakov Andreev a a V.P. Larionov Institute of the Physical-Technical Problems of the North of the Siberian Branch of the RAS, 677000, Yakutsk, Russian Federation Abstract The article provides examples and analysis of critical damage to a long-term gas pipeline in the Republic of Sakha (Yakutia) resulting from the development of corrosion processes. This is the accident in August 2006 at the gas pipeline branch to the city of Pokrovsk and the accident in December 2018 at the «Taas-Tumus-Yakutsk» gas pipeline. The mechanisms and scenarios of the development of corrosion damage in the permafrost zone are discussed. The studied gas pipeline was put into operation in 1967 and is still in operation. The construction and operation of the gas pipeline in the permafrost zone was of both industrial and experimental nature. Wherein, over 50 years of operation, damage and accidents caused by corrosion processes have occurred extremely rarely. But, taking into account the duration of the development of corrosion processes in the permafrost zone, an increase in the number of damages to the long-running main gas pipeline due to corrosion wear is expected in the near future. The stage of diffuse damage during long-term operation is confirmed by an increase in loss of efficiency due to corrosion damage over the last 25 years of operation of the main gas pipeline. 1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) The corrosion damage mechanisms of the gas pipelines in the Republic of Sakha (Yakutia) Aytalina Syromyatnikova a , Alexander Bolshakov a , Alexander Ivanov a, *, Anisiy Alexeev a , Konstantin Bolshev a , Yakov Andreev a a V.P. Larionov Institute of the Physical-Technical Problems of the North of the Siberian Branch of the RAS, 677000, Yakutsk, Russian Federation Abstract The article provides exampl s and analysis of critical damage to long-term gas pipeline in the Re ublic of Sakha (Yakutia) resulting from the development of corrosion processes. This is the accident in August 2006 at the gas pipeline branch to the city of Pokrovsk and the accident in Dec mber 2018 at the «Taas-Tumus-Yakutsk» gas pipeline. The m chanisms and scen ri s of the development of corrosion damage in the permafrost z e are discussed. The studied g s pipeli as put into operation in 1967 and is still in operation. The construction and operation of the gas pipelin in the p rmafrost zone was of both industrial an perimental nature. Wherein, over 50 years of operation, damage and accidents caused by corrosio processes have occurred extr m ly rar ly. But, taking into account the d ration of the development of corrosion processes in the permafrost zone, an increase in the n mber of damages to the long-running mai gas pipeline due to corrosion wear is expected in the near future. The stage of diffuse damag duri g long-term operation is confirmed by an increase in loss of efficiency due to corrosion damage over the last 25 years of operation of the main gas pipeline.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers

Keywords: corrosion, pipelines, damage, fracture, cryolitozone, steel, degradation, fractography Keywords: corrosion, pipelines, damage, fracture, cryolitozone, steel, degradation, fractography

1. Introduction The Republic of Sakha (Yakutia) is the largest region in Russia, known for its sharply continental extreme 1. Introduction The Republic of Sakha (Yakutia) is the largest region in Russia, known for its sharply continental extreme

* Corresponding author. Tel.: +7-914-100-06-56. E-mail address: spartak01@mail.ru * Correspon ing author. Tel.: +7-914-100-06-56. E-mail address: spartak01@mail.ru

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 2452 3216 © 2019 Th Author(s). Publis d by lsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ILEE-2019 organizers 10.1016/j.prostr.2019.12.149