Apart from the now well-established 13-channel measuring geometry for PQF mills, which is used for continuous measurement of polygonal wall distributions, the measuring system will be equipped for the first time for VSB with a high-resolution diameter gauge. A total of 18 laser triangulation sensorswill be fitted. This will enable highly accurate detection of out-of-round flaws and profiling of the tube outside diameter. The laser-based measuring technology integrated here for the first time in an IMS tube wall thickness measuring system has already been used successfully for several years at Ovako Steel AB in Hofors, Sweden, as standalone measuring system. The sensor and analysis systems are now being integrated in the IMS measuring system in close cooperation with the company LIMAB.
IMS can therefore simultaneously measure the wall thickness and eccentricity, outside diameter and profile, temperature and length of tubes in a single compact gauge, thereby avoiding the need to install multiple individual systems, which means not only savings in the cost of the overall investment, but also simpler maintenance and upkeep.