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ČSN EN ISO 11295 This document establishes the steps of the overall process of pipeline rehabilitation, comprising: - strategic and tactical activities: a) investigation and condition assessment of the existing pipeline; b) pipeline rehabilitation planning. - operational activities: c) project specification; d) applications of techniques; e) documentation of the design and application process. This document defines general terms of pipeline rehabilitation and establishes the classification of families of renovation and trenchless replacement techniques, with description of their respective features. This document is applicable to underground drains and sewers and underground water and gas supply networks. This document does not apply to: - new construction provided as network extensions; - calculation methods to determine, for each viable technique, the characteristics of lining or replacement pipe material needed to secure the desired performance of the rehabilitated pipeline; - techniques providing non-structural pipe liners; - techniques for repair.