Global seamless pipe giant Vallourec has been chosen by ENGIE’s subsidiary Storengy to provide a complete range of tubular solutions and associated services for the HyPSTER project, the first renewable hydrogen storage project supported by the European Union. The challenges of storing hydrogen in salt caverns are somewhat different from those of storing natural gas. Due to hydrogen’s leak propensity, it is particularly important to install tubular solutions that guarantee tightness and integrity, as well as increased resistance to highly corrosive environments. Vallourec therefore drew on its experience and in-depth knowledge of corrosion in hydrogen environments, as well as its ongoing R&D work on hydrogen, to propose steel grades best suited to Storengy's needs.Based on its long-standing partnership with the Group, both in terms of business and Research & Development, as well as the success of various storage projects already carried out in France, Storengy chose Vallourec, the world leader in premium tubular solutions for the energy markets, to participate in this pilot project. Vallourec has been selected to provide a complete range of tubes, services and VAM 21 connections, tested and validated for hydrogen storage. The European HyPSTER project, supported by the Clean Hydrogen Partnership and coordinated by Storengy, includes seven European partners: Armines-École Polytechnique, INOVYN, ESK, Element Energy, Ineris, Axelera. The project aims to design and operate an industrial demonstrator for the production, underground storage and use of renewable hydrogen. The main idea is to use electricity from renewable energies to produce hydrogen by electrolysis, which is then compressed and stored in an underground reservoir in a salt cavern. This project is located on Storengy's underground natural gas storage site in Etrez in France, which benefits from the presence of salt caverns used for natural gas storage and which can be converted for hydrogen storage.