This part of ISO 16952 contains sector-specific stipulations for structuring principles and reference designation rules on technical products and technical product documentation of power plants.It applies in combination with ISO/TS 16952-1, IEC/PAS 62400 and VGB B 101 for the classification of systems and objects, and for function-, product- and location-specific designation of technical products and their documentation for power plants.It specifies the designation blocks for the clear identification and localization of the technical products, which are used for their labelling in the plant, for their designation in technical documents and for the designati