CNI, le sur-mesure métallique

CNI is your partner for complex and ambitious projects in industry and architecture.
We specialize in boiler making, metalworking, metal structures, and mechanical welding for all your projects.

For over 50 years, CNI has been recognized as a leader in the design and installation of specialized metal products across various sectors, including naval construction, aerospace, offshore, industrial tooling, as well as urban planning and leisure infrastructure.

The company handles large-scale, high-tech "turnkey" projects, managing specific processes in their entirety.

Our highly qualified team provides the best technical solutions for all types of welding (steel, stainless steel, aluminum) and on-site assembly in Loire-Atlantique (44) and across France.