In wind turbine tower production, the butt joint seams of annular plates represent a critical quality control focus.
If the formed annular plates exhibit significant diameter deviations, assembly gaps of 2–3 mm or even larger may occur during splicing, leaving welding as the only compensation method.

The issue lies in the fact that thicker weld seams result in higher residual stress, making them prone to micro-cracking at stress concentration points during later operation. Clients have observed in the field that some annular plates develop fine cracks around the welds within just 2–3 years, requiring rework.

Therefore, the ability of the forming equipment to control the diameter within a ±1 mm tolerance is key to determining both the welding workload and the service life of the tower. Rather than simply "whether it can roll thick plates," what matters more to clients is: Can the seams close seamlessly? Will additional welding require extra time?