Besides point 1-3 below we consider the problem with touching the rings relates to laps of the coated coil slipping on top of each other. This is caused by low friction between laps of the coil for coated material. To improve the build up of coated material the following steps can be taken:Increase tension as far as possible i.e. >18-20N/mm2Check S-roll and final deflector roll are to correct roughness 4-6.3Ra