Ayesa Ingeniería has been chosen by Enagás as one of the engineering firms contributing to Spain’s multibillion-euro green hydrogen initiative—a transformative project designed to establish a nationwide hydrogen pipeline network. With a projected investment of more than €3 billion, the initiative aims to distribute green hydrogen across Spain and position the country as a leading European hub for renewable energy.

Ayesa will carry out both basic and detailed engineering for several sections of the new hydrogen pipeline. This phase of work is expected to span two to three years, with construction of the broader network anticipated to be well underway by 2030. The total engineering services for the hydrogen backbone will involve an investment of approximately €60 million. Ayesa plans to handle the majority of its work from its industrial headquarters in Seville.

Although green hydrogen remains an emerging energy source, Ayesa has previous experience in the sector. The company designed an electrolyzer and related infrastructure for the expansion of Repsol’s chemical plant in Sines, Portugal. Ayesa also contributed to a green hydrogen refueling project in northern England. That project included the installation of two electrolyzers, compression systems, storage tanks, refueling stations for various types of vehicles, and tanker equipment to deliver the gas to external clients.

Green hydrogen is produced through the electrolysis of water using electricity from renewable sources and is viewed as a clean substitute for natural gas. Spain’s goal is to become a key player in the global hydrogen economy by establishing a robust domestic distribution network. Enagás, currently responsible for the nation’s gas infrastructure, will manage the new hydrogen system and lead the development of its initial phases.

The first phase includes the creation of two major hydrogen corridors totaling 2,600 kilometers. These pipelines will connect large-scale hydrogen production sites with major industrial consumption zones. The plan includes both new and repurposed underground pipelines, divided into 15 segments across five major corridors:

•             Vía de la Plata Corridor: About 875 kilometers across four sections.

•             Cantabrian Coast Corridor: Roughly 440 kilometers in three sections.

•             Levante Corridor: Approximately 505 kilometers over four sections.

•             Transversal Castilla-La Mancha Corridor: Around 235 kilometers in one section.

•             Ebro Valley Corridor: About 535 kilometers over three sections.

More than 80% of the planned network will follow existing gas infrastructure routes. Approximately 21% of the pipelines will be adapted from current natural gas lines, reflecting a strategic approach to minimize environmental impact and accelerate deployment.