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dnaSRPS EN IEC 81346-1:2021

Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 1: Basic rules

General information

50.60     Jan 14, 2022



European Norm

01.110     29.020     29.02  


This part of IEC 81346, published jointly by IEC and ISO, establishes general principles for the structuring of systems including structuring of the information about systems.
Based on these principles, rules and guidance are given for the formulation of unambiguous reference designations for objects in any system.
The reference designation identifies objects for the purpose of creation and retrieval of information about an object, and where realized about its corresponding component.
A reference designation labelled at a component is the key to find information about that object among different kinds of documents.
The principles are general and are applicable to all technical areas (for example mechanical engineering, electrical engineering, construction engineering, process engineering). They can be used for systems based on different technologies or for systems combining several technologies.
This document is also a horizontal publication intended for use by technical committees in preparation of publications related to reference designations in accordance with the principles laid down in IEC Guide 108.

Life cycle


dnaSRPS EN IEC 81346-1:2021
50.60 Close of voting. Proof returned by secretariat
Jan 14, 2022

Related project

Adopted from EN IEC 81346-1:2022

Adopted from IEC 81346-1:2022 ED2 IDENTICAL