ISO 20560-2:2023

Safety information for the content of piping systems and tanks — Part 2: Tanks

This document specifies a safety information system for tanks made by combining several elements onto a single marking to communicate health and hazard safety information and information in case of an emergency for the purpose of accident prevention. The organization's risk assessment will determine when and where this safety information system for tanks will be used. Possible applications include, but are not limited to: — markings installed on or near fixed above-ground tanks; — markings installed on portable tanks; — markings installed on or near tanks used in production facilities, marine structures and ships; — markings posted on or near interchangeable containers with fixed connection; — markings installed on or near overground elements of underground tanks. This document establishes additional principles to ISO 3864-1 for the purpose of establishing design principles for the display of safety information on tanks typically found in workplaces, industry and other facilities with tanks and containers. It covers safety information for tanks only. It is not intended for use on products. This document does not cover tanks that are moved or transported. It does not apply to the labelling according to the United Nations' Globally harmonized system of classification and labelling of chemicals (GHS). Safety signing of the hazards in an area is not part of this document.

Consignes de sécurité concernant le contenu des tuyauteries et des réservoirs — Partie 2: Réservoirs

General Information

• Status: Published
• Publication Date: 05-Mar-2023
• ICS: 01.080.20 - Graphical symbols for use on specific equipment
• Technical Committee: ISO/TC 145/SC 2 - Safety identification, signs, shapes, symbols and colours
• Drafting Committee: ISO/TC 145/SC 2/WG 6 - Safety identification for the content of piping systems and tanks
• Current Stage: 6060 - International Standard published
• Start Date: 06-Mar-2023
• Due Date: 17-Sep-2022
• Completion Date: 06-Mar-2023

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20560-2
First edition
2023-03
Safety information for the content of
piping systems and tanks —
Part 2:
Tanks
Consignes de sécurité concernant le contenu des tuyauteries et des
réservoirs —
Partie 2: Réservoirs
Reference number
ISO 20560-2:2023(E)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO 20560-2:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 20560-2:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General requirements . 2
5 Elements of safety information systems for tanks . 3
5.1 General . 3
5.2 Content name . 3
5.3 Warning signs and/or GHS pictograms . 4
5.4 Tank identification . 5
5.5 Capacity of the tank . 5
5.6 Surface area of liquid in a tank . . 6
5.7 NFPA diamond. 6
5.8 Hazard identification number (HIN) and UN number . . 7
5.9 Other codes or information . 7
6 Dimensions of the tank marking elements . 7
7 Installation of safety information system for tanks . 7
7.1 General . 7
7.2 Large tanks . 8
7.3 Horizontal tanks . 9
7.4 Overview sign . 10
8 Maintenance, inspection and revision .10
Annex A (informative) Intervention service information.11
Annex B (informative) Basic identification colours .13
Annex C (informative) Examples of safety information systems for tanks .14
Annex D (informative) Distance factor for observing normal to the safety information
system.16
Bibliography .17
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO 20560-2:2023(E)
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.
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).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 145, Graphical symbols, Subcommittee
SC 2, Safety identification, signs, shapes, symbols and colours.
A list of all parts in the ISO 20560 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 20560-2:2023(E)
Introduction
Continuous growth in mobility of labour has resulted in a need to standardize a safety information
system and form a coherent system for non-verbal exchange of information that consists of distinct
elements to identify hazards related to the content of piping systems and tanks. Every element of
the safety information system defined in this document communicates specific information. When
combined on tanks, these elements inform the viewer, in a unique and simplified way, of potential
hazards so accidents can be prevented and an appropriate response to emergency situations can be
efficiently accomplished.
The use of this document is expected to reduce risk by providing a means of improved training and
education to reduce possible confusion for people working with and near tanks in both normal and
emergency situations.
The use of a standardized safety information system does not replace proper work methods,
instructions or accident-prevention training or measures. Education is an essential part of any system
that provides safety information.
NOTE Some countries’ statutory regulations possibly differ in some respect from the requirements given in
this document.
v
© ISO 2023 – All rights reserved

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 20560-2:2023(E)
Safety information for the content of piping systems and
tanks —
Part 2:
Tanks
IMPORTANT — The colours represented in the electronic file of this document can be neither
viewed on screen nor printed as true representations. For the purposes of colour matching, see
ISO 20560-1:2020, Annex A, which provides references from colour order systems.
1 Scope
This document specifies a safety information system for tanks made by combining several elements
onto a single marking to communicate health and hazard safety information and information in case of
an emergency for the purpose of accident prevention.
The organization's risk assessment will determine when and where this safety information system for
tanks will be used. Possible applications include, but are not limited to:
— markings installed on or near fixed above-ground tanks;
— markings installed on portable tanks;
— markings installed on or near tanks used in production facilities, marine structures and ships;
— markings posted on or near interchangeable containers with fixed connection;
— markings installed on or near overground elements of underground tanks.
This document establishes additional principles to ISO 3864-1 for the purpose of establishing design
principles for the display of safety information on tanks typically found in workplaces, industry and
other facilities with tanks and containers. It covers safety information for tanks only. It is not intended
for use on products.
This document does not cover tanks that are moved or transported. It does not apply to the labelling
according to the United Nations' Globally harmonized system of classification and labelling of chemicals
[5]
(GHS).
Safety signing of the hazards in an area is not part of this document.
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 3864-1:2011, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for
safety signs and safety markings
ISO 7010, Graphical symbols — Safety colours and safety signs — Registered safety signs
ISO 20560-1:2020, Safety information for the content of piping systems and tanks — Part 1: Piping systems
1
© ISO 2023 – All rights reserved

---------------------- Page: 6 ----------------------
ISO 20560-2:2023(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 20560-1 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
GHS hazard pictogram
graphical composition defined by the United Nations' Globally harmonized system of classification and
[5]
labelling of chemicals (GHS) that can include a symbol plus other graphic elements, such as a border,
background pattern or colour, intended to convey specific information as given by the GHS
3.2
safe observation distance
minimum observation distance to avoid harm in the event of potentially damaging or emergency
situations
Note 1 to entry: The safe observation distance is determined as part of the risk assessment.
3.3
safety data sheet
SDS
standardized information template for a medium which identifies the medium and contains information
about its potential health, physical and chemical hazards, and emergency and firefighting procedures
3.4
safety information system
series of markings that consistently uses standardized elements to visually communicate information
necessary for reliable recognition, identification and understanding of hazards
3.5
warning sign
safety sign that indicates a specific source of potential harm
[SOURCE: ISO 3864-1:2011, 3.16]
4 General requirements
A safety information system for tanks visually communicates information necessary for the reliable
recognition, identification and understanding of any hazard related to the type and character of the
content of a tank. This safety information system shall be installed on site and near any place that might
require operation, maintenance or manipulation of a tank’s contents, or intervention in the case of an
emergency situation.
This safety information system provides critical information that serves to assist in:
— the correct operation and use of tanks;
— the safe maintenance of the tanks;
— conveying critical information to trained personnel in emergency situations.
The safety information system shall, in a comprehensive and uniform manner, accurately identify the
contents and hazards associated with the contents of tanks in conformity with the contents’ safety data
sheets (SDSs). In some cases, the safety information system shall provide, in an integrated, coherent
visual manner, specific hazard information related to the tank’s contents. Examples of this information
2
  © ISO 2023 – All rights reserved

---------------------- Page: 7 ----------------------
ISO 20560-2:2023(E)
include the exact nature of the substance, temperature, toxicity and the risk of asphyxiation if a release
of the tank’s contents occurs.
The safety information system shall consistently use multiple visual elements to accurately convey its
information, identification and safety signs and GHS hazard pictograms. The information conveyed
by the safety information system shall be consistent with the organization’s risk assessment and its
operation and safety plans.
All elements of a safety information system shall be distinguishable and contrasting from any
neighbouring information and shall be visible from the observation distance intended for safe operation,
intervention or manipulation. When the contents of tanks include hazardous substances (see GHS),
the safety information system shall include distinctive, unambiguous elements and the corresponding
warning signs, GHS hazard pictograms or both.
To avoid confusion, the same safety information system elements shall be consistently used and
installed throughout all of an organization’s tanks, whether it is a single unit, multiple units on the
same site or a multi-plant operation.
The design of the safety informatio
...

ISO/DISFDIS 20560--2:20212022(E)
Date: 2022-06-0910-28
ISO/TC 145/SC 2
Secretariat: DIN
Safety information for the content of piping systems and tanks — Part 2: Tanks

---------------------- Page: 1 ----------------------
ISO/FDIS 20560-2:2022(E)
© ISO 20212022, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
[e-mail]
www.iso.org
ii © ISO 2022 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 20560-2:2022(E)
Contents
Foreword . iv
Introduction. v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General requirements . 2
5 Elements of safety information systems for tanks . 3
5.1 General . 3
5.2 Content name . 4
5.3 Warning signs and/or GHS pictograms . 5
5.4 Tank identification . 6
5.5 Capacity of the tank . 7
5.6 Surface area of liquid in a tank . 7
5.7 NFPA diamond . 8
5.8 Hazard identification number (HIN) and UN number . 9
5.9 Other codes or information . 10
6 Dimensions of the tank marking elements . 10
7 Installation of safety information system for tanks. 10
7.1 General . 10
7.2 Large tanks . 10
7.3 Horizontal tanks . 12
7.4 Multiple tanks . 14
8 Maintenance, inspection and revision . 15
Annex A (informative) Intervention service information . 16
Annex B (informative) Basic identification colours . 19
Annex C (informative) Examples of safety information systems for tanks . 20
Annex D (informative) Distance factor for observing normal to the safety information
system . 26
Bibliography . 28

© ISO 2022 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/FDIS 20560-2:2022(E)
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.
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).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 145, Graphical symbols, Subcommittee
SC 2, Safety identification, signs, shapes, symbols and colours.
A list of all parts in the ISO 20560 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv © ISO 2022 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 20560-2:2022(E)
Introduction
Continuous growth in mobility of labour has resulted in a need to standardize a safety information system
and form a coherent system for non-verbal exchange of information that consists of distinct elements to
identify hazards related to the content of piping systems and tanks. Every element of the safety
information system defined in this document communicates specific information. When combined on
tanks, these elements inform the viewer, in a unique and simplified way, of potential hazards so accidents
can be prevented and an appropriate response to emergency situations can be efficiently accomplished.
The use of this document is expected to reduce risk by providing a means of improved training and
education to reduce possible confusion for people working with and near tanks in both normal and
emergency situations.
The use of a standardized safety information system does not replace proper work methods, instructions
or accident-prevention training or measures. Education is an essential part of any system that provides
safety information.
NOTE Some countries’ statutory regulations could possibly differ in some respect from the requirements given
in this document.
© ISO 2022 – All rights reserved v

---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 20560-2:2022(E)

Safety information for the content of piping systems and tanks —
Part 2: Tanks
IMPORTANT — The colours represented in the electronic file of this document can be neither viewed on
screen nor printed as true representations. For the purposes of colour matching, see ISO 20560-1:2020,
Annex A, which provides references from colour order systems.
1 Scope
This document specifies a safety information system for tanks made by combining several elements onto
a single marking to communicate health and hazard safety information and information in case of an
emergency for the purpose of accident prevention.
The organization's risk assessment will determine when and where this safety information system for
tanks will be used. Possible applications include, but are not limited to:
— markings installed on or near fixed above-ground tanks;
— markings installed on portable tanks;
— markings installed on or near tanks used in production facilities, marine structures and ships;
— markings posted on or near interchangeable containers with fixed connection;
— markings installed on or near overground elements of underground tanks.
This document establishes additional principles to ISO 3864-1 for the purpose of establishing design
principles for the display of safety information on tanks typically found in workplaces, industry and other
facilities with tanks and containers. It covers safety information for tanks only. It is not intended for use
on products.
This document does not cover tanks that are moved or transported. It does not apply to the labelling
according to the United Nations' Globally Harmonized Systemharmonized system of Classification,
[6]
Labellingclassification and Packaginglabelling of Chemicalschemicals (GHS).).
Safety signing of the hazards in an area is not part of this document.
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 3864--1:2011, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for
safety signs and safety markings
ISO 7010, Graphical symbols — Safety colours and safety signs — Registered safety signs
© ISO 2022 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO/FDIS 20560-2:2022(E)
ISO 20560--1:2020, Safety information for the content of piping systems and tanks — Part 1: Piping systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 20560-1 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
GHS hazard pictogram
graphical composition defined by the United NationsNations' Globally Harmonized Systemharmonized
[6]
system of Classification, Labellingclassification and Packaginglabelling of Chemicalschemicals (GHS))
that can include a symbol plus other graphic elements, such as a border, background pattern or colour,
intended to convey specific information as given by the GHS
3.2
safe observation distance
minimum observation distance to avoid harm in the event of potentially damaging or emergency
situations
Note 1 to entry: The safe observation distance is determined as part of the risk assessment.
3.3
safety data sheet
SDS
standardized information template for a medium which identifies the medium and contains information
about its potential health, physical and chemical hazards, and emergency and firefighting procedures
3.4
safety information system
series of markings that consistently uses standardized elements to visually communicate information
necessary for reliable recognition, identification and understanding of hazards
3.5
warning sign
safety sign that indicates a specific source of potential harm
[SOURCE: ISO 3864-1:2011, 3.16]
4 General requirements
A safety information system for tanks visually communicates information necessary for the reliable
recognition, identification and understanding of any hazard related to the type and character of the
content of a tank. This safety information system shall be installed on site and near any place that might
require operation, maintenance, or manipulation of a tank’s contents, or intervention in the case of an
emergency situation.
This safety information system provides critical information that serves to assist in:
2 © ISO 2022 – All rights reserved

---------------------- Page: 7 ----------------------
ISO/FDIS 20560-2:2022(E)
— the correct operation and use of tanks;
— the safe maintenance of the tanks;
— conveying critical information to trained personnel in emergency situations.
The safety information system shall, in a comprehensive and uniform manner, accurately identify the
contents and hazards associated with the contents of tanks in conformity with the contents’ safety data
sheets (SDSs). In some cases, the safety information system shall provide, in an integrated, coherent
visual manner, specific hazard information related to the tank’s contents. Examples of this information
include the exact nature of the substance, temperature, toxicity and the risk of asphyxiation if a release
of the tank’s contents occurs.
The safety information system shall consistently use multiple visual elements to accurately convey its
information, identification and safety signs and GHS hazard pictograms. The information conveyed by the
safety information system shall be consistent with the organization’s risk assessment and its operation
and safety plans.
All elements of a safety information system shall be distinguishable and contrasting from any
neighbouring information and shall be visible from the observation distance intended for safe operation,
intervention or manipulation. When the contents of tanks include hazardous substances (see GHS), the
safety information system shall include distinctive, unambiguous elements and the corresponding
warning signs, GHS hazard pictograms or both.
To avoid confusion, the same safety information system elements shall be consistently used and installed
throughout all of an organization’s tanks, whether it is a single unit, multiple units on the same site or a
multi-plant operation.
The design of the safety information system shall consider and identify the different target audiences (e.g.
workforce and intervention services) under normal operational conditions and emergency conditions.
5 Elements of safety information systems for tanks
5.1 General
The safety information system for tank marking shall consist of the following three key elements:
a) content name;
b) when applicable, warning signs, GHS pictograms or both;
c) when applicable, tank identification.
The safety information system for tanks can include other information, such as:
— capacity of the tank in volume units;
— surface area of liquid in a tank;
— National Fire Protection Association (NFPA) diamond;
— hazard identification number (HIN), also known as the Kemmler code;
— United Nations number of the content (UN number);
— basic identification colour;
© ISO 2022 – All rights reserved 3

---------------------- Page: 8 ----------------------
ISO/FDIS 20560-2:2022(E)
— other codes or information.
See Annex C for examples of different safety information systems for tanks.
5.2 Content name
The tank’s content name shall be displayed in the local language or in multiple languages, see Figure 1.
This text element maybemay be the content name, its chemical formula or numbers in accordance with
national standards. Longer words may be abbreviated using standard approved abbreviations, known by
operators, as found in the organizati
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 20560-2
ISO/TC 145/SC 2
Safety information for the content of
Secretariat: DIN
piping systems and tanks —
Voting begins on:
2022-11-14
Part 2:
Voting terminates on:
Tanks
2023-01-09
Consignes de sécurité concernant le contenu des tuyauteries et des
réservoirs —
Partie 2: Réservoirs
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 20560-2:2022(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2022

---------------------- Page: 1 ----------------------
ISO/FDIS 20560-2:2022(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 20560-2
ISO/TC 145/SC 2
Safety information for the content of
Secretariat: DIN
piping systems and tanks —
Voting begins on:
Part 2:
Voting terminates on:
Tanks
Consignes de sécurité concernant le contenu des tuyauteries et des
réservoirs —
Partie 2: Réservoirs
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 20560-2:2022(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2022 – All rights reserved
NATIONAL REGULATIONS. © ISO 2022

---------------------- Page: 2 ----------------------
ISO/FDIS 20560-2:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General requirements . 2
5 Elements of safety information systems for tanks . 3
5.1 General . 3
5.2 Content name . 3
5.3 Warning signs and/or GHS pictograms . 4
5.4 Tank identification . 5
5.5 Capacity of the tank . 5
5.6 Surface area of liquid in a tank . . 6
5.7 NFPA diamond. 6
5.8 Hazard identification number (HIN) and UN number . . 7
5.9 Other codes or information . 7
6 Dimensions of the tank marking elements . 7
7 Installation of safety information system for tanks . 7
7.1 General . 7
7.2 Large tanks . 8
7.3 Horizontal tanks . 9
7.4 Multiple tanks . 10
8 Maintenance, inspection and revision .10
Annex A (informative) Intervention service information.11
Annex B (informative) Basic identification colours .13
Annex C (informative) Examples of safety information systems for tanks .14
Annex D (informative) Distance factor for observing normal to the safety information
system.16
Bibliography .17
iii
© ISO 2022 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 20560-2:2022(E)
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.
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).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 145, Graphical symbols, Subcommittee
SC 2, Safety identification, signs, shapes, symbols and colours.
A list of all parts in the ISO 20560 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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ISO/FDIS 20560-2:2022(E)
Introduction
Continuous growth in mobility of labour has resulted in a need to standardize a safety information
system and form a coherent system for non-verbal exchange of information that consists of distinct
elements to identify hazards related to the content of piping systems and tanks. Every element of
the safety information system defined in this document communicates specific information. When
combined on tanks, these elements inform the viewer, in a unique and simplified way, of potential
hazards so accidents can be prevented and an appropriate response to emergency situations can be
efficiently accomplished.
The use of this document is expected to reduce risk by providing a means of improved training and
education to reduce possible confusion for people working with and near tanks in both normal and
emergency situations.
The use of a standardized safety information system does not replace proper work methods,
instructions or accident-prevention training or measures. Education is an essential part of any system
that provides safety information.
NOTE Some countries’ statutory regulations possibly differ in some respect from the requirements given in
this document.
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 20560-2:2022(E)
Safety information for the content of piping systems and
tanks —
Part 2:
Tanks
IMPORTANT — The colours represented in the electronic file of this document can be neither
viewed on screen nor printed as true representations. For the purposes of colour matching, see
ISO 20560-1:2020, Annex A, which provides references from colour order systems.
1 Scope
This document specifies a safety information system for tanks made by combining several elements
onto a single marking to communicate health and hazard safety information and information in case of
an emergency for the purpose of accident prevention.
The organization's risk assessment will determine when and where this safety information system for
tanks will be used. Possible applications include, but are not limited to:
— markings installed on or near fixed above-ground tanks;
— markings installed on portable tanks;
— markings installed on or near tanks used in production facilities, marine structures and ships;
— markings posted on or near interchangeable containers with fixed connection;
— markings installed on or near overground elements of underground tanks.
This document establishes additional principles to ISO 3864-1 for the purpose of establishing design
principles for the display of safety information on tanks typically found in workplaces, industry and
other facilities with tanks and containers. It covers safety information for tanks only. It is not intended
for use on products.
This document does not cover tanks that are moved or transported. It does not apply to the labelling
according to the United Nations' Globally harmonized system of classification and labelling of chemicals
[6]
(GHS).
Safety signing of the hazards in an area is not part of this document.
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 3864-1:2011, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for
safety signs and safety markings
ISO 7010, Graphical symbols — Safety colours and safety signs — Registered safety signs
ISO 20560-1:2020, Safety information for the content of piping systems and tanks — Part 1: Piping systems
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ISO/FDIS 20560-2:2022(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 20560-1 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
GHS hazard pictogram
graphical composition defined by the United Nations' Globally harmonized system of classification and
[6]
labelling of chemicals (GHS) that can include a symbol plus other graphic elements, such as a border,
background pattern or colour, intended to convey specific information as given by the GHS
3.2
safe observation distance
minimum observation distance to avoid harm in the event of potentially damaging or emergency
situations
Note 1 to entry: The safe observation distance is determined as part of the risk assessment.
3.3
safety data sheet
SDS
standardized information template for a medium which identifies the medium and contains information
about its potential health, physical and chemical hazards, and emergency and firefighting procedures
3.4
safety information system
series of markings that consistently uses standardized elements to visually communicate information
necessary for reliable recognition, identification and understanding of hazards
3.5
warning sign
safety sign that indicates a specific source of potential harm
[SOURCE: ISO 3864-1:2011, 3.16]
4 General requirements
A safety information system for tanks visually communicates information necessary for the reliable
recognition, identification and understanding of any hazard related to the type and character of the
content of a tank. This safety information system shall be installed on site and near any place that might
require operation, maintenance or manipulation of a tank’s contents, or intervention in the case of an
emergency situation.
This safety information system provides critical information that serves to assist in:
— the correct operation and use of tanks;
— the safe maintenance of the tanks;
— conveying critical information to trained personnel in emergency situations.
The safety information system shall, in a comprehensive and uniform manner, accurately identify the
contents and hazards associated with the contents of tanks in conformity with the contents’ safety data
sheets (SDSs). In some cases, the safety information system shall provide, in an integrated, coherent
visual manner, specific hazard information related to the tank’s contents. Examples of this information
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ISO/FDIS 20560-2:2022(E)
include the exact nature of the substance, temperature, toxicity and the risk of asphyxiation if a release
of the tank’s contents occurs.
The safety information system shall consistently use multiple visual elements to accurately convey its
information, identification and safety signs and GHS hazard pictograms. The information conveyed
by the safety information system shall be consistent with the organization’s risk assessment and its
operation and safety plans.
All elements of a safety information system shall be distinguishable and contrasting from any
neighbouring information and shall be vis
...