Vallourec S.A. is a multinational manufacturing company headquartered in Meudon, France. Vallourec specializes in hot rolled seamless steel tubes, expandible tubulat technology, automotive parts, and stainless steel, which it provides to energy, construction, automotive, and mechanical industries. Vallourec shares are listed on NYSE Euronext.

As of 2022, Vallourec has 17,000 employees, numerous integrated manufacturing facilities, advanced R&D operations, and a presence in more than 20 countries.

To address growing hydrogen storage needs and support the development of green hydrogen Vallourec has developed a unique hydrogen storage solution, called Delphy. Delphy makes large-scale storage of compressed gaseous hydrogen possible at an unprecedented scale, between 1 to 100 tons, with safety as the main focus. 

Delphy stores compressed hydrogen in underground tube strings with a minimal surface footprint and a modular design adaptable to storage needs.