HY-FEN project: the 820 km hydrogen pipeline linking France to Europe

Understanding the HY-FEN project and the European H2Med corridor

HY-FEN is a dedicated hydrogen pipeline project led by NaTran, designed as the French segment of the European H2Med corridor. The infrastructure is meant to connect Fos-sur-Mer, a strategic Mediterranean port entry point, to the German border near Moselle, over a distance of 820 kilometres. This route positions France as a central link in hydrogen circulation between southern and northern Europe.

The geographic scale of the project is considerable: the route crosses five French regions, namely Provence-Alpes-Côte d'Azur, Occitanie, Auvergne-Rhône-Alpes, Bourgogne-Franche-Comté and Grand Est. In total, 512 municipalities are affected by the pipeline's path, which implies extensive local consultation and administrative coordination across multiple territorial levels. This diversity of territories crossed illustrates the logistical and regulatory complexity of an energy infrastructure project of this magnitude.

As part of H2Med, HY-FEN is not purely a national undertaking: it contributes to building a European hydrogen transport network designed to connect production zones, particularly in southern Europe, to the industrial basins of the north, which are heavy consumers of decarbonised energy. This cross-border corridor logic aims to pool investment and secure supply flows between member states.

What uses does this major infrastructure target?

Heavy industry and professional mobility

The priority uses identified for HY-FEN concern first heavy industry, particularly steelmaking, chemicals and refining, sectors where decarbonised hydrogen acts as a direct substitute for fossil energy in production processes. These industries account for a significant share of French and European industrial emissions, which explains their position at the top of the infrastructure's intended beneficiaries. Heavy mobility is also among the targeted uses, with trucks, buses, trains and logistics as concrete outlets for hydrogen available at scale and competitive cost.

Aviation, maritime, and the residential question

Aviation and maritime transport are also concerned, not through direct use of gaseous hydrogen, but via synthetic fuels, or e-fuels, produced from decarbonised hydrogen combined with captured carbon. These e-fuels are seen as an essential decarbonisation pathway for air and sea transport, where direct electrification remains limited by the technical constraints of long-haul flights and maritime freight. HY-FEN could therefore indirectly feed the production chains of these alternative fuels.

It should be clearly stated, however, that no direct residential supply is currently planned in France at this stage of the project. In Italy, by contrast, several pilot projects are exploring hydrogen blending into residential gas networks: Castelfranco Emilia is testing a 5% rate, Sestu in Sardinia is running its own trials, and Torre de' Passeri is experimenting with rates between 10 and 20%. These Italian initiatives provide useful feedback but do not, at this stage, foreshadow a similar direction for the French residential market.

The timeline and the stakes for energy sovereignty

The planned HY-FEN timeline spans several years and follows a classic sequence for a linear infrastructure project of this size. The public consultation phase is scheduled for 2026, followed by technical studies and permitting processes between 2027 and 2029. Pipeline construction work would begin in 2030, with commissioning targeted for 2032, a horizon of nearly a decade between announcement and actual operation.

The stated goal of transporting 2 million tonnes of decarbonised hydrogen per year places HY-FEN among the structuring infrastructures for industrial decarbonisation in Europe. If achieved, such a volume would cover a substantial share of the needs of heavy industries located along the route, while reducing their dependence on imported fossil supplies. This dimension goes beyond climate concerns alone to touch directly on the question of the continent's energy independence.

In a geopolitical context marked by volatile fossil energy markets and the search for more resilient supply chains, a hydrogen corridor linking the Mediterranean to northern Europe represents a strategic asset. It would allow European industries to diversify their energy sourcing and reduce their exposure to imports from outside the continent. The project's long timeframe, with commissioning not expected before 2032, nonetheless underlines that this reinforced energy sovereignty will only be built progressively.

How Heeding supports the transition while infrastructure is being built

With commissioning not expected before 2032, HY-FEN will not meet the immediate supply needs of transport and industry players already engaged in their energy transition today. This is precisely the gap Heeding helps close, through a neutral marketplace that sells no fuel under its own name. Buyers operating in aviation, maritime, road or rail can compare offers from sustainable fuel suppliers, whether hydrogen, e-fuels or biofuels, right now.

While waiting for HY-FEN to come online in 2032, securing sustainable fuel supply now remains the operational priority for industrial and transport buyers.