The infrastructure contribution of Bulgartransgaz EAD to the SEEHyC Corridor consist of a new 580 km bi-directional H2 transmission infrastructure, developed in 2 phases.

Phase 1 of the project is planned to be commissioned by the end of 2029 and has been included in the 1st List of PCIs/PMIs. It includes about 250 km hydrogen transmission pipelines with DN 1000 spanning between the Bulgarian-Greek border and the region of Sofia, together with 2 compressor stations located near the cities of Petrich and Dupnitsa.

Phase 2 of the project is also planned to be commissioned by the end of 2029 and will be submitted for PCI status. It extends the infrastructure under Phase 1 further into Bulgaria’s interior and towards Romania, featuring a new 330 km pipeline of similar specifications, together with 3 compressor stations. Originating from the Sofia region, particularly Novi Iskar, this segment includes a branch reaching the Romanian border at the future H2 IP Ruse/Giurgiu.

TRANSGAZ plans in the framework of this corridor and the European Hydrogen Backbone a new pipeline stretch from Ruse/Giurgiu at the Bulgarian-Romanian border to Nadlac/Csanadpalota at the Romanian-Hungarian border. This infrastructure section has a length of 580 km with a diameter of DN 800 and through foreseen compressor stations a maximum capacity of 100 GWh/d is technical feasible.

FGSZ’s contribution to the SEEHy Corridor includes a new 399 km long pipeline as well as a compressor station of 32 MW at Csanádpalota. The Hungarian part of the corridor consists of two projects. Under the first project the pipeline starts from the RO/HU border at Csanádpalota and ends at Vecsés. The second part includes the pipeline which starts at Vecsés going towards the HU/SK border at Balassagyarmat, with a branch line that connects the main entry and exit points at the Pannonian hydrogen valley, which appears in the national hydrogen strategy. The main pipeline connecting the RO/HU and HU/SK interconnection points will be built with DN800 pipes, while the branch line will be DN600 pipes. The Hungarian H2 corridor will have a maximum capacity of 100 GWh/day.

The infrastructure contribution of Eustream to the SEEHyC Corridor stretches from Balassagyarmat on the Hungarian-Slovak border to Lanžhot on the Slovak-Czech border. The first section, between the Hungarian-Slovak border and the existing natural gas Compressor Station Veľké Zlievce, will consist of a newly built DN800 pipeline (SK-HU H2 Corridor). This pipeline will be connected to the Slovak Hydrogen Backbone, where the DN1200 section between Compressor Station Veľké Zlievce and Gas Node Plavecký Peter and the DN900 section between Gas Node Plavecký Peter and the Slovak-Czech border (IP Lanžhot) will be repurposed. The 243 km long hydrogen pipeline without compression enables a capacity of 144 GWh per day.

The existing natural gas infrastructure in Slovakia allows further scale-up of H2 transmission capacities via repurposing additional pipelines and building new H2-ready compressor units.

Website: https://www.eustream.sk/en/

The infrastructure contribution of NET4GAS to the SEEHy Corridor stretches from Lanžhot on the Slovak-Czech border to Waidhaus on the Czech-German border by repurposing one gas pipeline out of three of large-diameter parallel systems (DN 1000+). The approx. 400 km long hydrogen pipeline without compression enables a capacity of 144 GWh per day.

The project is part of European and national TYNDP under the name of Czech H2 Backbone South. Development plans – NET4GAS (available only in Czech)

OGE is playing a key role in shaping plans for tomorrow’s hydrogen infrastructure. In this context, OGE and all other German TSOs have submitted the draft application for the hydrogen core network to the Federal Network Agency and the Federal Ministry of Economics and Climate Protection. The total length of the optimized core grid is around 9,700 km and consists mainly of converted natural gas pipelines (approx. 60%). This draft fulfills the goals of a Germany-wide, expandable, efficient and quickly realizable hydrogen infrastructure by the target year 2032, as set out in the proposed Energy Law (EnWG) amendment on the hydrogen core network that is currently under discussion. An infrastructure that enables broad access to hydrogen as an energy carrier or as a raw material forms the basis for the development of a financially viable hydrogen market and is a prerequisite for Germany to be able to fulfil its desired pioneering role in climate protection.

OGE’s part of this network in South Germany includes the repurposed MEGAL infrastructure from the French/German border in Medelsheim to the border of Germany and the Czech Republic in Waidhaus jointly owned and commercially operated by OGE and GRTgaz Deutschland (DN 800 – 1100), as well as the new-built OGE pipeline between Rothenstadt and Forchheim (DN 1000), with a capacity of 144 GWh per day.