SIST EN ISO 14456:2024

SLOVENSKI STANDARD
01-oktober-2024
Nadomešča:
SIST EN ISO 14456:2017
SIST EN ISO 14456:2017/A1:2019
Plinske jeklenke - Lastnosti plina in pripadajoči razvrstitveni razredi (FTSC) (ISO
14456:2024)
Gas cylinders - Gas properties and associated classification (FTSC) codes (ISO
14456:2024)
Gasflaschen - Eigenschaften von Gasen und zugehörige Klassifizierungscodes (FTSC)
(ISO 14456:2024)
Bouteilles à gaz - Propriétés des gaz et codes de classification associés (FTSC) (ISO
14456:2024)
Ta slovenski standard je istoveten z: EN ISO 14456:2024
ICS:
23.020.35 Plinske jeklenke Gas cylinders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 14456
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2024
EUROPÄISCHE NORM
ICS 23.020.35 Supersedes EN ISO 14456:2016, EN ISO
14456:2016/A1:2019
English Version
Gas cylinders - Gas properties and associated classification
(FTSC) codes (ISO 14456:2024)
Bouteilles à gaz - Propriétés des gaz et codes de Gasflaschen - Eigenschaften von Gasen und zugehörige
classification associés (FTSC) (ISO 14456:2024) Klassifizierungscodes (FTSC) (ISO 14456:2024)
This European Standard was approved by CEN on 19 April 2024.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14456:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 14456:2024) has been prepared by Technical Committee ISO/TC 58 "Gas
cylinders" in collaboration with Technical Committee CEN/TC 23 “Transportable gas cylinders” the
secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2024, and conflicting national standards
shall be withdrawn at the latest by November 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 14456:2016.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 14456:2024 has been approved by CEN as EN ISO 14456:2024 without any modification.

International
Standard
ISO 14456
Second edition
Gas cylinders — Gas properties and
2024-04
associated classification (FTSC) codes
Bouteilles à gaz — Propriétés des gaz et codes de classification
associés (FTSC)
Reference number
ISO 14456:2024(en) © ISO 2024
ISO 14456:2024(en)
© ISO 2024
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 14456:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Gas properties - Numerical gas code (FTSC) . 2
4.1 General .2
4.2 Fire potential, category I .2
4.3 Acute toxicity, category II .2
4.4 State of the gas (in the cylinder at 15 °C), category III .3
4.5 Corrosiveness, category IV .3
5 List of gases and liquids with the corresponding FTSC codes . 4
5.1 Basic principles and single gases .4
5.2 Assignment of a gas mixture to a group .4
5.3 Tables of compatible groups of gases and liquids .5
Annex A (informative) Chemical and hazard data related to additional proposed FTSC entries . 19
Bibliography .43

iii
ISO 14456:2024(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 58, Gas cylinders, Subcommittee SC 2, Cylinder
fittings, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/
TC 23, Transportable gas cylinders, in accordance with the Agreement on technical cooperation between ISO
and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 14456:2015), which has been technically
revised. It also incorporates the Amendment ISO 14456:2015/Amd.1:2019.
The main changes are as follows:
— corrections to CAS numbers and FTSC codes;
— consequential revisions as a result of a new edition of ISO 5145;
— addition of new FTSC codes for commonly used gases and liquids.
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 14456:2024(en)
Introduction
This document establishes a method of allocating a four-digit code number (FTSC) to any gases and
liquids that are transported under pressure or mixture of gases contained in cylinders. This code number
categorizes the gas, liquids that are transported under pressure or gas mixture in terms of its physical-
chemical properties and/or flammability, toxicity, state of gas, and corrosiveness (see 4.1). FTSC is the
abbreviation of these properties.
The FTSC code enables gases and liquids that are transported under pressure or gas mixtures to be assigned
to one of the 15 “compatible” gas groups.
The properties and the selection criteria are aligned as appropriate with the Globally Harmonized System of
[11]
Classification and Labelling of Chemicals (GHS).

v
International Standard ISO 14456:2024(en)
Gas cylinders — Gas properties and associated classification
(FTSC) codes
1 Scope
This document gives a list of FTSC (fire potential, i.e. “oxidizing power and flammability”, toxicity, state of
the gas, and corrosiveness) codes determined according to the relevant properties of gases and of some
liquids that are transported under pressure.
It does not cover material compatibility with gases which is covered by the ISO 11114 series.
2 Normative references
There are no normative references in this document.
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 following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
gas mixture
combination of different single gases and/or liquids deliberately mixed in specified proportions resulting in
a homogeneous gaseous mixture
[SOURCE: ISO 10286:2021, 3.5.2, modified]
3.2
lique
...