ISO 14617-2:2025

Graphical symbols for diagrams — Part 2: Graphical symbols

This document specifies graphical symbols for diagrams related to industrial components, products and processing. This document constitutes a symbol library, from which users can use the symbols or created symbol examples for use in diagrams (see Tables 1 to 149). General rules and guidance for the preparation and presentation of graphical symbols are given in ISO 14617-1. Application rules for the symbols are shown in normative Annex A. This document does not apply to: — graphical symbols for fluid power objects, see ISO 1219-1 (the collective application standard of the ISO 14617 series); — symbols of measurement and control functions such as mathematical functions and process functions; — graphical symbols for electrotechnical objects, see the IEC 60617 database. Symbols deleted from the previous edition of the ISO 14617 series are summarized in informative Annex B as a reference. The alphabetic index of symbols defined in this document is shown in informative Annex C.

Symboles graphiques pour schémas — Partie 2: Symboles graphiques

General Information

• Status: Published
• Publication Date: 24-Apr-2025
• 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: 6060 - International Standard published
• Start Date: 25-Apr-2025
• Due Date: 02-May-2025
• Completion Date: 25-Apr-2025

Relations

• Revises: ISO 3511-4:1985 - Industrial process measurement control functions and instrumentation — Symbolic representation — Part 4: Basic symbols for process computer, interface, and shared display/control functions
• Effective Date: 07-Jul-2022
• Revises: ISO 14617-10:2002 - Graphical symbols for diagrams — Part 10: Fluid power converters
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-4:2002 - Graphical symbols for diagrams — Part 4: Actuators and related devices
• Effective Date: 06-Jun-2022
• Revises: ISO 3511-1:1977 - Process measurement control functions and instrumentation — Symbolic representation — Part 1: Basic requirements
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-9:2002 - Graphical symbols for diagrams — Part 9: Pumps, compressors and fans
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-15:2002 - Graphical symbols for diagrams — Part 15: Installation diagrams and network maps
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-3:2002 - Graphical symbols for diagrams — Part 3: Connections and related devices
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-7:2002 - Graphical symbols for diagrams — Part 7: Basic mechanical components
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-2:2002 - Graphical symbols for diagrams — Part 2: Symbols having general application
• Effective Date: 06-Jun-2022
• Revises: ISO 3511-2:1984 - Process measurement control functions and instrumentation — Symbolic representation — Part 2: Extension of basic requirements
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-8:2002 - Graphical symbols for diagrams — Part 8: Valves and dampers
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-14:2004 - Graphical symbols for diagrams — Part 14: Devices for transport and handling of material
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-1:2005 - Graphical symbols for diagrams — Part 1: General information and indexes
• Effective Date: 06-Jun-2022
• Revises: ISO 14617-6:2002 - Graphical symbols for diagrams — Part 6: Measurement and control functions
• Effective Date: 06-Jun-2022
• Revises: ISO 3511-3:1984 - Process measurement control functions and instrumentation — Symbolic representation — Part 3: Detailed symbols for instrument interconnection diagrams
• Effective Date: 06-Jun-2022

Standards Content (Sample)

International
Standard
ISO 14617-2
Second edition
Graphical symbols for diagrams —
2025-04
Part 2:
Graphical symbols
Symboles graphiques pour schémas —
Partie 2: Symboles graphiques
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: [phone]
Email: [e-mail]
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Published in Switzerland
ii
Contents
Foreword . ix
Introduction . xi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General application symbols . 2
4.1 Components, devices, functional units, equipment, plants and functions . 2
4.1.1 Basic symbols . 2
4.1.2 Supplementary symbols . 2
4.1.3 Symbol examples . 4
4.2 Variability . 5
4.2.1 Basic symbols . 5
4.2.2 Supplementary symbols . 5
4.2.3 Symbol examples . 5
4.3 Characteristics for force, motion, mass flow, magnetic flow and signals . 6
4.3.1 Basic symbols . 6
4.3.2 Supplementary symbols . 7
4.3.3 Symbol examples . 7
4.4 Directions . 7
4.4.1 Basic symbols . 7
4.4.2 Supplementary symbols . 9
4.4.3 Symbol examples . 10
4.5 Materials . 12
4.5.1 Basic symbols . 12
4.5.2 Supplementary symbols . 12
4.5.3 Symbol examples . 12
4.6 Simplifications . 13
4.6.1 Basic symbols . 13
4.6.2 Supplementary symbols . 13
4.6.3 Symbol examples . 13
4.7 General electrotechnical symbols . 14
4.7.1 Basic symbols . 14
4.7.2 Supplementary symbols . 15
4.7.3 Symbol examples . 15
5 Connections and related devices (fluids). 15
5.1 Connections, general . 15
5.1.1 Basic symbols . 15
5.1.2 Supplementary symbols . 16
5.1.3 Symbol examples . 18
5.2 Connection functional joints . 19
5.2.1 Basic symbols . 19
5.2.2 Supplementary symbols . 19
5.2.3 Symbol examples . 19
5.3 Connection devices . 20
5.3.1 Basic symbols . 20
5.3.2 Supplementary symbols . 22
5.3.3 Symbol examples . 22
5.4 Connection, simplifications . 22
iii
5.4.1 Basic symbols .22
5.4.2 Supplementary symbols .23
5.4.3 Symbol examples .23
5.5 Couplings, quick release couplings .23
5.5.1 Basic symbols .23
5.5.2 Supplementary symbols .23
5.5.3 Symbol examples .23
5.6 Pipeline and duct elements .24
5.6.1 Basic symbols .24
5.6.2 Supplementary symbols .27
5.6.3 Symbol examples .27
5.7 Access chambers, inspection wells .28
5.7.1 Basic symbols .28
5.7.2 Supplementary symbols .29
5.7.3 Symbol examples .29
6 Fluid flow control .29
6.1 General purpose valves .29
6.1.1 Basic symbols .29
6.1.2 Supplementary symbols .30
6.1.3 Symbol examples .32
6.2 Dampers .37
6.2.1 Basic symbols .37
6.2.2 Supplementary symbols .37
6.2.3 Symbol examples .37
6.3 Valves with special functions .38
6.3.1 Basic symbols .38
6.3.2 Supplementary symbols .38
6.3.3 Symbol examples .38
6.4 Taps, showers, etc. .39
6.4.1 Basic symbols .39
6.4.2 Supplementary symbols .40
6.4.3 Symbol examples .40
6.5 Hydrants .40
6.5.1 Basic symbols .40
6.5.2 Supplementary symbols .40
6.5.3 Symbol examples .40
6.6 Safety devices other than valves .41
6.6.1 Basic symbols .41
6.6.2 Supplementary symbols .41
6.6.3 Symbol examples .41
7 Actuators .42
7.1 Basic elements .42
7.1.1 Basic symbols .
...