ISO 81346-12:2018

INTERNATIONAL ISO
STANDARD 81346-12
First edition
2018-05
Industrial systems, installations and
equipment and industrial products —
Structuring principles and reference
designations —
Part 12:
Construction works and building
services
Systèmes industriels, installations et appareils, et produits
industriels — Principes de structurations et désignations de
référence —
Partie 12: Travaux de construction et services bâtiment
Reference number
©
ISO 2018
© ISO 2018
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Published in Switzerland
ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Structuring . 4
4.1 General . 4
4.2 Function-oriented structure . 5
4.3 Product-oriented structure . 5
4.4 Location-oriented structure . 6
4.5 Type-oriented structure. 6
5 Reference designation . 6
5.1 General . 6
5.2 Systems . 7
5.3 Identification of top nodes . 7
5.4 Designation of objects . 8
5.5 Designation of locations .10
5.5.1 General.10
5.5.2 Point of installation .10
5.5.3 Site of installation .11
6 Specific designations .12
6.1 Designation of signals .12
6.2 Designation of terminals .12
6.3 Designation of documents.12
7 Designation of types .12
8 Designations and properties of objects .13
Annex A (normative) Classification letter codes .15
Annex B (informative) Examples of application .23
Annex C (informative) Specific designations .48
Bibliography .49
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
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constitute an endorsement.
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URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 10, Technical product documentation,
Subcommittee SC 10, Process plant documentation, in cooperation with Technical Committee IEC/TC 3,
Information structures and elements, identification and marking principles, documentation and graphical
symbols.
Documents in the 80000 to 89999 range of reference numbers are developed by collaboration between
ISO and IEC.
IEC 81346 consists of the following basic parts, under the general title Industrial systems, installations
and equipment and industrial products — Structuring principles and reference designations:
— Part 1: Basic rules
— Part 2: Classification of objects and codes for classes
A list of all parts in the ISO 81346 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

Introduction
This document considers and supports the planning, erection, utilization and operation of construction
works. The application of a reference designation system for construction works (RDS-CW) may lead
to restructuring and reorientation of these activities and thereby offers the potential for increasing
efficiency and economization. The following advantages of designation systems will become
increasingly important in the future.
— The reference designation system can be applied in several technical fields in the same way and is
not designed only for one. So, technical, structural and constructive objects, for example, can be
treated in the same way – a basis for company-wide synergy effects.
— The reference designation system allows for integrating any kind of systems and components
without changing the once defined designations.
— The reference designation is not bound to a fixed structural pattern. Thus the designation system is
vertically and horizontally expansible, which makes the interpretability in some cases quite complex.
Therefore an exact and computer-interpretable documentation and description is essential.
— The application of different aspects allows for designation of system elements by function, realizing
products or location independently of each other.
— The different aspects in structuring and the possibility of creating relations between objects
represented in these structures offer search and filter criteria and information correlations in a
much greater variety than before.
Users of this document will be able to manage object occurrences and related properties in a more
efficient and consistent way. When implemented, information across various data processing systems
can be handled in an unambiguous way. Other well-known information structures besides the reference
designation structures in this document are:
— organization structures;
— utilization structures;
— cost structures;
— performance structures;
— real estate structures.
These and other structures can be linked to each other, or to the reference-designation-based
structures, so that requirements of flexibility and individuality can be fulfilled.
New three-letter codes are used according to IEC 3/1224A/CD (IEC 81346-2:2009), Table 3.
INTERNATIONAL STANDARD ISO 81346-12:2018(E)
Industrial systems, installations and equipment and
industrial products — Structuring principles and reference
designations —
Part 12:
Construction works and building services
1 Scope
This document establishes rules for structuring of systems and the formulation of reference
designations and provides classes for systems in the field of construction works and building services.
This document also specifies a classification of objects and corresponding letter codes for use in
reference designations of object occurences.
This document is not intended for manufacturers or system-related designations of individuals (e.g.
inventory number or serial number) or for product types (e.g. article number or parts number).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4157-2:1998, Construction drawings — Designation systems — Part 2: Room names and numbers
ISO 15519-1, Specification for diagrams for process industry — Part 1: General rules
IEC 61082-1, Preparation of Documents used in electrotechnology — Part 1: Rules
IEC 81346-1:2009, Industrial systems, installations and equipment and industrial products — Structuring
principles and reference designations — Part 1: Basic rules
IEC 81346-2:2009, Industrial systems, installations and equipment and industrial products — Structuring
principles and reference designations — Part 2: Classification of objects and codes for classes
IEC 61175-1, Industrial systems, installations and equipment and industrial products — Designation of signals
IEC 61355-1:2008, Classification and designation of documents for plants, systems and equipment —
Part 1: Rules and classification tables
IEC 61666, Industrial systems, installations and equipment and industrial products — Identification of
terminals within a system
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the
...