ECOACCIAIO Srl has completed the construction of two large biogas tanks near Bologna, Italy, using the Nordweld tank erection system to overcome significant site access limitations and improve construction efficiency.
The project involved the construction of two tanks, each measuring 24 metres in diameter and 17 metres in height. The roofs and first shell courses were built using stainless steel 304, while the shell and bottom plates were constructed from carbon steel 273.
According to project details, the development was carried out under highly restricted access conditions, creating logistical and operational challenges during the erection process. Limited workspace around the tanks affected material handling, crew organisation, and the sequencing of construction activities.
To address these challenges, ECOACCIAIO implemented the Nordweld system, which allows the entire tank structure to rotate during construction. This approach enabled sheet feeding and key operations to be performed from a single location, reducing the need for repeated material movement and simplifying site logistics.
The rotating system also helped optimise workflow by improving the use of the available working space, reducing interference with nearby activities, and creating a more structured erection sequence. In addition, the project utilised rotating fixtures, turntables, and a mobile welding station to support circumferential welding operations and improve ergonomics for welding crews.
One of the most technically demanding stages of the project was roof construction, particularly due to the restricted access around the tanks. A rotation system for the shoring tower was introduced to streamline roof assembly and adapt the construction process to the confined site conditions. The solution helped maintain project efficiency without increasing logistical complexity.
The use of the Nordweld system also contributed to improved welding quality by providing stable rotating welding conditions and reducing alignment challenges associated with large cylindrical tank sections. The approach additionally supported safer working conditions and smoother project execution.
Project details included:
* Client: ECOACCIAIO Srl
* Location: Italy
* Number of tanks: 2
* Diameter: 24 metres
* Height: 17 metres
* Roof and first course material: Stainless steel 304
* Shell and bottom plates: Carbon steel 273
The project highlights the growing role of modular and rotation-based tank construction systems in improving efficiency for large industrial structures, particularly in sites with restricted access and complex logistics.
For more information visit www.nordweld.eu
