PSI - Issue 36

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com

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Procedia Structural Integrity 36 (2022) 378–385

© 2022 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 conference Guest Editors Abstract The gas transmission system (GTS) of Ukraine is currently operating under underloading conditions. The utilization rate obtained by gas pipelines productivity/ their capacity proportion is approximately 50 percent. In the following years, this proportion will be decreasing to 30 percent. Therefore, the search for alternative kinds of products aimed at pipelines load increase as well as the search for alternative ways of GTS idle components use has been a very important problem. In particular, some possibilities of using the pipelines taken out of service for the mixture of natural gas and hydrogen transportation have been considered in recent years. As for environmental decarbonization, the problem of hydrogen use for both domestic and industrial needs is getting more and more topical as fossil mineral resources substitution for hydrogen is ecologically safe and energy saving. Nowadays, Ukraine has not only th e considerable resources to generate wind and solar power which can be used whilst receiving “green” hydrogen but also the powerful GTS which is underloaded. Therefore, to increase its load level the Operator GTS of Ukraine has considered any possibilities of some hydrogen transportation (up to 20 percent) in mixture with natural gas. Nevertheless, a number of unsolved problems arise which require a scientific approach, namely: the study of the GTS operating modes while some hydrogen is being admixed, hydrogen impact on mechanical properties of the pipe steel, and determination of the hydrogen loss while it is transmitted by the system whose service life is more than 40 years, etc. Thus, one of the most essential problems for Ukraine is to determine the possibilities of renewable gases (hydrogen, in particular) transportation and storage. The choice of separate GTS objects for the further use of gas-hydrogen mixture transportation in the system or their removal has to be scientifically substantiated. Therefore, a mathematical model has been developed in the paper under consideration to determine and forecast the specified object technical position based on the diagnostic examination, mechanical tests, and stochastic study. Abstract The gas transmission system (GTS) of Ukraine is currently operating under underloading conditions. The utilization rate obtained by gas pipelines productivity/ their capacity proportion is approximately 50 percent. In the following years, this proportion will be decreasi g to 30 percent. Therefore, the search for alternative kinds of products imed at pipeli es load increase as well s the search for alternative ways of GTS idle om onents use h s been a very im orta t problem. In particul r, some ossibilities of using the pipelines taken out of service for the mixture of atural gas and hydrogen transportation have bee onsidered in recent years. As for environmental decarbonization, the problem of hydrogen use for both domestic and industrial needs is getting more and mor to ical as fossil mineral resources substitution for hydrogen is ecologically safe and energy saving. Nowadays, Ukrai e has not only th e considerable resources to generate wind and solar power which can be used whilst receivi g “green” hydrogen but also the powerful GTS which is underloaded. Therefore, to incr ase its load l vel the Oper tor GTS of Ukraine has considered any possibilities of me hydrogen transport tion (up t 20 percent) in mixture with natural gas. N vertheless, a n mber of uns lv d problems arise which requir a sci ntific approa h, namely: the study of the GTS operating modes w ile s me hydrogen is being admixed, hydrogen impact on mecha ical pr perties of the pipe steel, and determination of th hydrogen loss while it is transmitted by the ystem whose s rvice life is more than 40 years, etc. Thus, one of the most essential problems f r Ukraine is to determine the possibiliti s of renewable gases (hydr g n, in particular) transportation and storage. T choice of separate GTS objects for the further use of gas-hydrogen mixture transport tion in t e syst m or their r moval has to be scientifically substantiated. Therefore, a mathematical model has been developed in the paper under consider tion to determine and for cast the specified object tec nical position based on the diagnostic examination, mechanical tests, and stochastic study. 1st Virtual International Conference “In service Damage of Materials: Diagnostics and Prediction” Reliability assurance of gas-hydrogen mixture transportation by gas pipeline system V. Zapukhlyak a , Yu. Melnychenko a , І . Оkipnyi b *, L. Poberezhny a , Ya. Grudz a , N. Drin a , M. Chernetskyy c a Ivano-Frankivsk National Technical University of Oil and Gas, 15 Karpatska St., Ivano-Frankivsk, 76019, Ukraine, 1st Virtual International Conference “In service Damage of Materials: Diagnostics and Prediction” Reliability assurance of gas-hydrogen mixture transportation by gas pipeline system V. Zapukhlyak a , Yu. Melnychenko a , І . Оkipnyi b *, L. Poberezhny a , Ya. Grudz a , N. Drin a , M. Chernetskyy c a Ivano-Frankivsk National Technical University of Oil and Gas, 15 Karpatska St., Ivano-Frankivsk, 76019, Ukraine, b Ternopil Ivan Puluj National Technical University, Ruska 56, Ternopil 46001, Ukraine, c PJSC PVI ZIT "Naftogazbudizolyatsiya " ,14, Ivan Vyhovsky str, Kyi , 04136, Ukraine b Ternopil Ivan Puluj National Technical University, Ruska 56, Ternopil 46001, Ukraine, c PJSC PVI ZIT "Naftogazbudizolyatsiya " ,14, Ivan Vyhovsky str, Kyiv, 04136, Ukraine

* Corresponding author. Tel.: +38-0352-52-41-81; fax: +38-0352-25-49-83. E-mail address: i.okipnyi@gmail.com * Corresponding author. Tel.: +38-0352-52-41-81; fax: +38-0352-25-49-83. E-mail address: i.okipnyi@gmail.com

2452-3216 © 2022 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 conference Guest Editors 10.1016/j.prostr.2022.01.049 2452-3216 © 2022 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 conference Guest Editors 2452-3216 © 2022 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 conference Guest Editors