PSI - Issue 33

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDir ct Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

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ScienceDirect

Procedia Structural Integrity 33 (2021) 646–651

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo Abstract Hydrogen will play a significant role in a decarbonised energy system in the coming decades. Extensive infrastructure exists for distribution of natural gas and it is an obvious step to assess it to be used for supply hydrogen or mixtures with natural gas. The durability and integrity issues in existing natural gas distribution steel pipelines associated with hydrogen embrittlement of steel at transporting hydrogen or mixtures natural gas with hydrogen are considered. Two mechanisms of steel hydrogenation from pipe internal surface are taken into account, namely, as a result of electrochemical corrosion due to presence of moisture in transported gas, and molecular hydrogen dissociation. Dissipated microdamaging in the bulk of the pipe wall is distinguished as the main factor of manifestation of hydrogen embrittlement of steel and its durability loss, increasing a risk of structural integrity violation. A sensitivity of some physico-mechanical properties of pipeline steels to hydrogen degradation is analysed. Some technological solutions are considered which should accompany experimental research on the assessment of the pipe serviceability at supply hydrogen or mixtures natural gas with hydrogen, including long-term exposing of pre-loaded specimens in hydrogen or hydrogen natural gas mixture. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo Keywords: natural gas distribution network; hydrogen transportation; pipeline steel; hydrogen embrittlement; dissipated microdamaging IGF26 - 26th International Conference on Fracture and Structural Integrity Pipeline durability and integrity issues at hydrogen transport via natural gas distribution network Hryhoriy Nykyforchyn a, *, Leonid Unigovskyi b , Olha Zvirko a , Oleksandr Tsyrulnyk a , Halyna Krechkovska a a Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5, Naukova St., 79060 Lviv, Ukrain b Naftogazbudinformatyka Ltd., 5-B, Kudriavskyi Descent, office 208, 04053 Kyiv, Ukraine Abstract Hydrogen will play a significant role in a decarbonised energy system in the coming decades. Extensive infrastructure exists for distribution of natur l gas and i is an obvious step to assess it to b used for supply hydrogen or mixtures with na al ga . The urabili y and i teg ity is ues in existing nat ral gas distribution ste l pipelines associate with hydrogen mbrittlement of steel at transporting hydro en or mixtur s natural gas with hydrogen are considered. Two mechanisms of ste l hydrogenatio from pipe internal surface are taken into accoun , n mely, as a result of electr chemical corr sion due to presenc of moisture n transported gas, and mole ul r hydrogen dissocia io . Dissipated microdamaging in the bulk of the pip wall is distinguished as the m in fac or of m ifestation of hydrogen embrit lement of s el and its durability loss, increasing a risk of structural integri y violation. A sensitivity of some physico-m chanical properties of pipeline stee s to hydrog n de r dation is analysed. Some technol gical olutions are c nsidered which s ould acc mpany experime tal r search on th ass ssment of the pipe serviceability at supply hydrogen o mixtures natural ga with hydr gen, including lo g-te m exposi g of pre-load d specimens in hydrogen or hydrogen natural gas mixture. © 2021 The Au hors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-revi w under responsibility of th scientifi committee of the IGF ExCo K ywords: natur l gas distribution net ork; hydrogen transportation; pipeli e steel; hydrogen embrittlement; dissipated microdamaging IGF26 - 26th International Conference on Fracture and Structural Integrity Pipeline durability and integrity issues at hydrogen transport via natural gas distribution network Hryhoriy Nykyforchyn a, *, Leonid Unigovskyi b , Olha Zvirko a , Oleksandr Tsyrulnyk a , Halyna Krechkovska a a Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5, Naukova St., 79060 Lviv, Ukraine b Naftogazbudinformatyka Ltd., 5-B, Kudriavskyi Descent, office 208, 04053 Kyiv, Ukraine

* Corresponding author. Tel.: +380 322 294213; fax: +380 322 649427. E-mail address: hnykyforchyn@gmail.com * Corresponding author. Tel.: +380 322 294213; fax: +380 322 649427. E-mail address: hnykyforchyn@gmail.com

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo 2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-revi w under responsibility of the scientifi committee of the IGF ExCo

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo 10.1016/j.prostr.2021.10.071