EKO Stahl has successfully installed a Parsytec HTS3 surface inspection system in the
hot strip mill. The main reason for the installation of this system was the growing
demand for the immediate detection of surface defects. Using the system it was possible
to significantly reduce the downgrading in the cold rolling mill because of surface
defects. The benefits of the system are the improved possibilities to investigate the
reasons for surface defects and the early re-routing of non conforming products. As an
example, the procedure used to investigate the emergence of edge shells is presented.