This European Standard specifies a system for the classification of techniques for renovation and repair of drains and sewers outside buildings, operated under gravity or pressure, including pipes, connections and manholes. It defines and describes families of techniques and their different generic methods and materials used. This European Standard does not describe specific products. For each technique family it lists relevant existing standards, materials and applications and outlines characteristics including installation aspects, structural and hydraulic capabilities and site impact. Necessary work on the existing pipe prior to renovation and repair is outside the scope of this European Standard. This European Standard provides information needed to determine viable options for identification of the optimal technique with regard to a given set of renovation and repair objectives. NOTE It is the responsibility of the designer to choose and design the renovation and repair systems. It does not specify the calculation methods to determine, for each viable technique, the required amount of lining material needed to secure the desired performance of the renovated pipeline.