Vallourec, a leading provider of seamless premium tubular solutions, has secured official qualification from certification body DNV for its Delphy vertical gaseous hydrogen storage solution. This milestone, following extensive development and testing processes, heralds a breakthrough for both Vallourec and the hydrogen sector. Delphy, capable of storing 1 to 100 tonnes of hydrogen while occupying minimal ground space, ensures maximum safety and addresses the specific requirements of complex industrial environments. The system, reaching depths of up to 100 meters, serves green hydrogen producers and industries such as synthetic fuel production, ammonia facilities, steelworks, and refineries. The project, initiated in 2022, engaged 30 researchers and experts focusing on precision threading, thermal treatments, and non-destructive testing. Vallourec's demonstrator's inauguration in December 2023 was followed by thorough evaluations to guarantee Delphy's reliability and safety. This DNV qualification validates compliance with the industry's strictest standards. Vallourec has inked agreements with H2V and NextChem Tech for green hydrogen and ammonia projects, with discussions ongoing for 50 projects in France and globally, potentially yielding €2 billion in turnover. The surge in demand for hydrogen storage infrastructure, propelled by European regulations and decarbonization policies, aligns well with Delphy's offerings. The market outlook for hydrogen, especially green hydrogen, witnesses substantial growth, necessitating storage solutions for intermittent production. European mandates emphasizing alignment with renewable electricity further fuel the demand for advanced systems like Delphy. Philippe Guillemot, Vallourec's Chairman and CEO, views Delphy's qualification as a testament to the company's adaptation of industrial expertise to new energy realms, solidifying their role in the hydrogen market and global decarbonization efforts. Santiago Blanco from DNV highlights the pivotal role of Delphy in meeting the projected 188mn-tonne global hydrogen demand by 2050. The certification underlines the necessity for scalable and secure infrastructure to meet escalating industrial requirements. Vallourec's innovative storage solution paves the way for a sustainable and efficient hydrogen storage landscape, positioning the company at the forefront of the energy transition.