ISO 14617-1:2005

Graphical symbols for diagrams — Part 1: General information and indexes

ISO 14617-1:2005 serves as an introduction to all the other parts of ISO 14617. In particular, it gives information on the creation and use of registration numbers for identifying graphical symbols used in diagrams, rules for the presentation and application of these symbols, and examples of their use and application. It includes three indexes: an alphabetic index and an index of registration numbers -- both concerned uniquely with ISO 14617-2 to ISO 14617-12 -- and an index of cross-references to related items found in other International Standards.

Symboles graphiques pour schémas — Partie 1: Informations générales et index

General Information

• Status: Published
• Publication Date: 28-Jul-2005
• ICS: 01.080.30 - Graphical symbols for use on mechanical engineering and construction drawings, diagrams, plans, maps and in relevant technical product documentation
• Technical Committee: ISO/TC 10/SC 10 - Process plant documentation
• Drafting Committee: ISO/TC 10/SC 10 - Process plant documentation
• Current Stage: 9599 - Withdrawal of International Standard
• Due Date: 14-Mar-2025
• Completion Date: 14-Mar-2025

Relations

• Consolidated By: ISO 28706-4:2016 - Vitreous and porcelain enamels — Determination of resistance to chemical corrosion — Part 4: Determination of resistance to chemical corrosion by alkaline liquids using a cylindrical vessel
• Effective Date: 06-Jun-2022
• Revised: ISO 14617-1:2025 - Graphical symbols for diagrams — Part 1: General rules
• Effective Date: 24-Sep-2022
• Revised: ISO 14617-2 - Graphical symbols for diagrams — Part 2: Graphical symbols
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-1:2002 - Graphical symbols for diagrams — Part 1: General information and indexes
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 14617-1
Second edition
2005-07-15
Graphical symbols for diagrams —
Part 1:
General information and indexes
Symboles graphiques pour schémas —
Partie 1: Informations générales et index

Reference number
©
ISO 2005
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2005
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2005 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Arrangement of ISO 14617.2
5 Registration numbers.3
6 Presentation of graphical symbols.4
7 Application rules and examples.5
8 Use of graphical symbols .5
9 Lettering.5
10 Indexes.6
Annex A (informative) Alphabetical index .7
Annex B (informative) Index of graphical symbol registration numbers .34
Annex C (informative) Cross-reference index .41
Bibliography .55

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 organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 14617-1 was prepared by Technical Committee ISO/TC 10, Technical product documentation,
Subcommittee SC 10, Process plant documentation and tpd-symbols.
This second edition cancels and replaces the first edition (ISO 14617-1:2002), of which it constitutes a minor
revision.
ISO 14617 consists of the following parts, under the general title Graphical symbols for diagrams:
 Part 1: General information and indexes
 Part 2: Symbols having general application
 Part 3: Connections and related devices
 Part 4: Actuators and related devices
 Part 5: Measurement and control devices
 Part 6: Measurement and control functions
 Part 7: Basic mechanical components
 Part 8: Valves and dampers
 Part 9: Pumps, compressors and fans
 Part 10: Fluid power converters
 Part 11: Devices for heat transfer and heat engines
 Part 12: Devices for separating, purification and mixing
 Part 13: Devices for material processing
 Part 14: Devices for transport and handling of material
 Part 15: Installation diagrams and network maps
iv © ISO 2005 – All rights reserved

Introduction
The purpose of ISO 14617 in its final form is the creation of a library of harmonized graphical symbols for
diagrams used in technical applications. This work has been, and will be, performed in close cooperation
between ISO and IEC. The ultimate result is intended to be published as a standard common to ISO and IEC,
which their technical committees responsible for specific application fields can use in preparing International
Standards and manuals.
INTERNATIONAL STANDARD ISO 14617-1:2005(E)

Graphical symbols for diagrams —
Part 1:
General information and indexes
1 Scope
This part of ISO 14617 serves as an introduction to all the other parts. In particular, it gives information on the
creation and use of registration numbers for identifying graphical symbols used in diagrams, rules for the
presentation and application of these symbols, and examples of their use and application. It includes three
indexes: an alphabetical index and an index of registration numbers — both concerned uniquely with
ISO 14617 — and an index of cross-references to related items found in other International Standards.
For the fundamental rules of creation and application of graphical symbols in diagrams, see ISO 81714-1.
2 Normative references
The following referenced documents are indispensable for the application 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 81714-1:1999, Design of graphical symbols for use in the technical documentation of products — Part 1:
Basic rules
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE The list has been restricted to terms whose meaning is not obvious and which have not been defined
elsewhere in an International Standard, or which have been defined in various ways in different standards. In preparing
these definitions, ISO and IEC standards on terminology have been consulted; see the references in parentheses.
However, most of the definitions in those standards were prepared by different technical committees within a restricted
scope. This means that many terms so defined have to be given more general or neutral definitions when applied in the
context of graphical symbols.
3.1
function
activity proper to anything, mode of action by which it fulfils its purpose
EXAMPLE To measure, to control, to indicate.
3.2
product
thing produced by natural process or manufacture; result
EXAMPLE An element, a component or a device.
3.3
component
constituent part of equipment that cannot be physically divided into smaller parts without losing its character
[IEC 60050-131]
3.4
device
assembly of components to perform a required function
EXAMPLE An actuating device, a centrifuge.
[IEC 60050-151]
3.5
element
part of a component
EXAMPLE A filter element in a filter, a contact in an electromechanical relay.
3.6
graphical symbol
visually perceptible figure used to transmit information independently of language
[ISO 81714-1]
3.7
terminal line
line of a graphical symbol ending at a connect node
NOTE A connect node is a location on a graphical symbol intended for connection (ISO 81714-1).
[ISO 81714-1]
3.8
connecting line
graphical symbol representing a functional connection, a mechanical link, a pipeline, a duct, or an electric
connection
[IEC 61082-1]
4 Arrangement of ISO 14617
4.1 Domains of application
The complete ISO 14617 is to consist of a number of other parts in addition to those listed in the Foreword.
Among the parts under preparation are ISO 14617-13, concerned with graphical symbols for material
processing, and ISO 14617-14, concerned with the symbols representing devices for transport and handling of
material.
This part of ISO 14617 is an introduction to all the other parts. ISO 14617-2 to ISO 14617-6 cover graphical
symbols for use in most technical fields. ISO 14617-7 to ISO 14617-12 cover those for use in all fields except
the electrotechnical. ISO 14617-15 comprises graphical symbols for use in installation diagrams and on
network maps for pipelines, ducts and electric connections.
2 © ISO 2005 – All rights reserved

4.2 Subdivision of parts
Each part of ISO 14617 is divided into clauses that each deal with graphical symbols for a particular group of
generic products or functions. When appropriate, clauses are given subclauses, as follows using the example
of Clause 7 from ISO 14617-2:
Clause 7 Directions
Subclause 7.1 Symbols of basic nature
Subclause 7.2 Application rules for the symbols in 7.1
Subclause 7.3 Symbols giving supplementary information
Subclause 7.4 Application rules for the symbols in 7.3
Subclause 7.5 Application examples
Where certain subclauses are further subdivided, this has been done along the following lines. Take, for
example, 4.3 in ISO 14617-2:
Subclause 4.3 Symbols giving supplementary information
Subclause 4.3.1 Input and output labels
Subclause 4.3.2 General functions
Subclause 4.3.3 Mathematical operations
Subclause 4.3.4 Change of discrete state at specified values of a characteristic quantity
Subclause 4.3.5 Logic negation, logic inversion, inputs and outputs for auxiliary power supply
When a cross-reference is made to a particular graphical symbol or application rule or application example, its
location is given within parentheses after the registration number of the symbol, rule or example.
EXAMPLE 1 “See R101 (4.2.1)” directs the reader to application rule R101, located in subclause 4.2.1.
When cross-referencing to another part, the part number is also included.
EXAMPLE 2 A cross-reference to symbol 142 in ISO 14617-2 is given as “See 142 (2-4.3.2.28)”.
5 Registration numbers
IMPORTANT — A direct relationship does not necessarily exist between graphical symbols,
application rules and application examples using registration numbers that share the same numerals.
For example, while graphical symbol 101 correlates to both application rule R101 and application
example X101, it correlates as well to application examples X102 to X114; whereas symbol 114, to take
just one other example, is unrelated to R114 and X114.
5.1 Graphical symbol
Each graphical symbol is assigned a unique registration number. In principle, this number is arbitrarily chosen.
No information can be derived from it. The registration number will remain unchanged throughout the lifetime
of the corresponding graphical symbol, including in future revisions of this publication. If a graphical symbol is
changed in the future, the registration number shall be supplemented with one or more characters. If the
graphical symbol is substantially changed, it shall instead be given a new registration number.
5.2 Application rule
Each application rule has a registration number in the same way as the graphical symbols, except that the
registration number starts with the letter R (e.g. R101).
5.3 Application example
Each application example has a registration number in the same way as the graphical symbols, except that
the registration number starts with the letter X (e.g. X101).
6 Presentation of graphical symbols
6.1 General
ISO 14617 establishes graphical symbols to be used in diagrams such as overview diagrams, flow diagrams
and circuit diagrams.
6.2 Graphical symbols of same shape but different meaning
Graphical symbols having the same shape but different meanings have different registration numbers. This
implies that it is possible to distinguish between same-shape graphical symbols in a CAD (computer-aided
design) system, provided that each s
...