Vallourec develops hydrogen storage solutions

French pipe manufacturer to collaborate with Geostock

French pipe manufacturer Vallourec will collaborate with Geostock, a company specializing in underground energy storage, to develop infrastructure solutions for the energy transition. This was announced in a statement by Vallourec.

The parties signed a memorandum of understanding in December 2025. They will collaborate on infrastructure for hydrogen storage, carbon capture, utilization, and storage (CCUS).

The companies have complementary product and service offerings. Vallourec’s ready-to-use Delphy system can store up to 100 tons of hydrogen under maximum safety conditions, while Geostock’s rock caverns are ideal for larger capacities (over 500 tons).

“Together, Vallourec and Geostock can meet all green hydrogen storage needs in the value chain,” the press release says.

The companies will also explore synergies in underground design and project execution. For example, Geostock’s expertise in subsoil development can be used to support customers in installation and related engineering work for Vallourec’s Delphy solution.

The parties will exchange experience, research results, and technical solutions for the design of wells suitable for the complex conditions of underground hydrogen storage and carbon injection.

The collaboration is part of Vallourec’s broader strategy to partner with key experts and leading players in the new energy sector.

In September 2025, the UK signed contracts for two pioneering commercial projects for carbon dioxide capture and storage. These involve world-leading carbon capture technology to be deployed at the Padeswood cement plant (Heidelberg Materials) in North Wales and the Protos waste-to-energy plant (Encyclis) in Ellesmere Port in north-west England.