This European Standard applies to hydraulic dampers and their end mountings used on rail vehicles. The dampers covered in this standard include: - Dampers that control the dynamic behaviour of a vehicle: - Suspensions dampers, (e.g. primary vertical dampers, secondary vertical dampers and secondary lateral dampers); - Yaw dampers; - Roll dampers; - Inter-vehicles dampers. - Dampers that control the dynamic behaviour of mechanical systems: - Pantograph dampers; - Motor dampers, etc. All relevant terminology which is specific to the subject is defined in this European Standard.