Press Release VALLOUREC OBTAINS THE QUALIFICATION OF ITS HYDROGEN STORAGE SOLUTION AND LAUNCHES COMMERCIALIZATION Meudon (France), June 5, 2025 – Vallourec, a world leader in premium seamless tubular solutions, announces the official qualification of Delphy, its vertical gaseous hydrogen storage solution, by DNV. A world first, Delphy enables the storage of 1 to 100 tons of hydrogen under maximum safety conditions. Thanks to its minimal footprint, this vertical system - extending up to 100 meters undergroun ...