THE MAIN GAS PIPELINES MECHANICAL DAMAGE INFLUENCE ON SAFE OPERATION / MAGISTRALINIO DUJOTIEKIO MECHANINIŲ PAŽEIDIMŲ ĮTAKA SAUGIAM EKSPLOATAVIMUI

The influence of mechanical damage of the gas transmission pipelines on safe pipelines operation was researched in the article. The paper presents the main pipelines damage types with actual parameters and influence on operational parameters. The main pipeline Kaunas – Kaliningrad part, which was removed as no longer usable, was analysed. This damaged part was removed and changed to a new part by a responsible company. The hardness measurement and micro hardness measurement, chemical analysis, impact strength test, metallography analysis with an optical microscope were used in experiments. The analysed pipeline part was also regenerated by the computer software ANSYS, which works by the finite elements method. Santrauka  Straipsnyje nagrinėjama magistralinių dujotiekių mechaninių pažeidimų įtaka saugiam jų eksploatavimui. Darbe pateikti pagrindiniai vamzdynų pažeidimo tipai su jiems būdingais bruožais ir įtaka eksploataciniams parametrams. Ištirta magistralinio dujotiekio Kaunas – Kaliningradas dalis, kuri buvo pašalinta, kaip nebetinkama naudojimui. Tyrimams pasitelktas kietumo ir mikrokietumo matavimas, cheminės analizės tyrimas, smūginio tąsumo bandymas. Mikrostruktūros tyrimams naudotas optinis mikroskopas. Tiriamasis objektas buvo atkurtas kompiuterinės programos, veikiančios baigtinių elementų metodu, ANSYS erdvėje. Raktiniai žodžiai: defektas, dujotiekis, įlenkimas, išskaptavimas, liekamasis resursas, mechaniniai pažeidimai, vamzdynas

The Lorraine carboniferous basin (France) as a new target of regional gas resource for the energy transition strategy?

International audienceKnowledge of the nature of the deep-seated geological structures of Europe is a strategic aspect of the energy transition. Indeed, the existence of underground resources as well as geological features able to serve as energy storage sites becomes increasingly important. Natural gas has been classified by the European Union as sustainable investment and current dramatic events underline how energy transition efforts can be jeopardized without secured supply. In such background, the identification of local/regional gas resources is important. In Lorraine (North-East France), the Carboniferous basin play an important resource of coal bed methane (CBM). Currently, new exploration campaigns are being carried out through the research program REGALOR (2018-2023) and new accurate data are offered by La Française de l'Energie. Therefore, new research contributes to a better understanding of the sedimentary pattern and thermal history of the basin. The Lorraine Carboniferous Basin is about 200 km long, 80 km wide. The sedimentary infilling is made up of 8 km of fluvio-lacustrine deposits. The Westphalian strata (315-308 Ma) which host most of the coal deposits are overlain by fluvio-lacustrine series of Stephanian (307-302 Ma) in which coal is far lesser abundant. Carboniferous-Permian strata are buried under a 500 to 1800 m thick Mesozoic cover of 500m to 1800m (Donsimoni, 1981; Izart et al., 2016)

Low defect InGaAs quantum well selectively grown by metal organic chemical vapor deposition on Si(100) 300 mm wafers for next generation non planar devices

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Introducing photonic devices for 40Gbits/s wavelength division multiplexing transceivers on 300-mm SOI wafers using CMOS processes

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Introducing photonic devices for 40Gbits/s wavelength division multiplexing transceivers on 300-mm SOI wafers using CMOS processes

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Gate-last integration on planar FDSOI for low-VTp and low-EOT MOSFETs

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