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

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ScienceDirect

Procedia Structural Integrity 20 (2019) 167–173

1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Reliability of linear main gas pipelines after longer operation in cryolithozone conditions Yakov Mikhailovich Andreev a , Evgeny Savvich Lukin a , Prokopyev Leonid Aleksandrovich a , Aleksandr Ruslanovich Ivanov b, * a Federal Research Centre “The Yakut Scientific Centre of the Siberian Branch of the Russian Academy of Sciences”, Yakutsk, Russia b The Institution of Russian Academy of Sciences the V.P. Larionov’s Institut of Physical-Technical Problems of the North, Siberian Branch of the RAS, Yakutsk, Russia Abstract Ensuring the reliability of gas main pipelines, after long-term operation in a cryolithozone, is a very urgent task. Due to changes in the mechanical properties of metal pipes after their long-term operation, changes in spatial positions relative to design positions in permafrost, accidents and incidents have become more frequent. At the same time, the nature of damage to pipelines of gas pipelines in different regions of Russia is different. In the regions of Russia with high air humidity and soils that freeze to a shallow depth in winter, the onset of defect formation is on the surface of pipes, mainly in the form of corrosion, whereas, in areas where cryolithozone propagates, the onset of formation of defects is in the “body” of the pipe wall and an increase in these defects leads to more disastrous consequences. Also, in areas of distribution of cryolithozone, corrosion damage is rarely observed. The article deals with one of the sections of the linear trunk gas pipeline where the incident occurred in the form of pipeline discharge. The main cause of the release is considered to be the constantly changing topography of this area as a result of periodic thawing of permafrost. The existing regulatory documents on the construction of gas pipelines contain calculations, often referring to the general rules of building mechanics. Thus, the design organization may not sufficiently take into account modern developments in scientific research in the field of cold resistance and operation of gas pipelines in the areas of cryolithozone distribution under conditions of extremely low temperatures. 1st International Conference on Integrity and Lifetime in Extreme Environment (ILEE-2019) Reliability of linear main gas pipelines after longer operation in cryolithozone conditions Yakov Mikhailovich Andreev a , Evgeny Savvich Lukin a , Prokopyev Leonid Aleksandrovich a , Aleksandr Ruslanovich Ivanov b, * a Federal Research Centre “The Yakut Scientifi Centre of the Siberian Bra ch of the Ru si n Academy of Sciences”, Yakutsk, Russia b The Institution of Russian Academy of Sciences the V.P. Larionov’s Institut of Physical-Technical Problems of the North, Siberian Branch of the RAS, Yakutsk, Russia Abstract Ensuring the reli bility of gas main pipelines, after long-term op rati n in a cryolithozone, is a very urgent task. Due to changes in the mechanical properties of metal pipes after th ir long-term operation, changes in spatial positi ns rel tive to design positions in p rmafrost, accidents and incidents hav become more frequent. At the same time, the nature of damage to pipelines of gas pip lines in diff rent regions f Russia is different. In the regions of Russia with high air humidity and soils that fr eze to a shallo depth in winter, the onset of defect formation is the surface of pipes, mainly in the form of corrosion, whereas, in areas wh re cryolithozone propagates, the onset of formation of defects is in the “body” f t e pipe wall and an increase in th se defects leads to more disastrous consequences. Also, in areas of distribution of cryolithozo e, corr sion damage is rarely observed. The article deals with one of the sections of th linear trunk gas pipeline where the incident ccurred in the form f ipeline dischar e. The ain cause of the release is considered to be the constantly changing topogra hy of this area as a result of periodic thawing of permafrost. The existing regulatory documents on the constructi of gas pipelines cont in calculati ns, often referring to the ge eral rules of building mechanics. Thus, the desig organization may not sufficiently take into account modern dev lopments i scientific research in the field of cold resistance and operation of gas pipelines in the areas of cryolithozone distribution under conditions of extremely low temperatures.

© 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: reliability, main gas pipeline, beyond-design position, durability, permafrost, low temperature, acoustic emission control, solid carbon dioxide. Keywords: reliability, main gas pipeline, beyond-design position, durability, permafrost, low temperature, acoustic emission control, solid carbon dioxide.

* Corresponding author. Tel.: +79142869956. E-mail address: spartak01@mail.ru * Correspon ing author. Tel.: +79142869956. 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.2019.12.134