EN ISO 13338:2022

SLOVENSKI STANDARD
01-november-2022
Nadomešča:
SIST EN ISO 13338:2020
Plinske jeklenke - Plini in zmesi plinov - Določanje korozivnosti plinov in njihovih
zmesi za izbiro izhodnega priključka ventila na jeklenki (ISO 13338:2022)
Gas cylinders - Gases and gas mixtures - Determination of corrosiveness for the
selection of cylinder valve outlet (ISO 13338:2022)
Gasflaschen - Gase und Gasgemische - Bestimmung der Ätzwirkung auf lebendes
Gewebe zur Auswahl von Ventilausgängen (ISO 13338:2022)
Bouteilles à gaz - Gaz et mélanges de gaz - Détermination de la corrosivité pour le choix
des raccords de sortie de robinets (ISO 13338:2022)
Ta slovenski standard je istoveten z: EN ISO 13338:2022
ICS:
23.020.35 Plinske jeklenke Gas cylinders
71.100.20 Industrijski plini Gases for industrial
application
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 13338
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 71.100.20; 23.020.35 Supersedes EN ISO 13338:2020
English Version
Gas cylinders - Gases and gas mixtures - Determination of
corrosiveness for the selection of cylinder valve outlet (ISO
13338:2022)
Bouteilles à gaz - Gaz et mélanges de gaz - Gasflaschen - Gase und Gasgemische - Bestimmung der
Détermination de la corrosivité pour le choix des Ätzwirkung auf lebendes Gewebe zur Auswahl von
raccords de sortie de robinets (ISO 13338:2022) Ventilausgängen (ISO 13338:2022)
This European Standard was approved by CEN on 25 May 2022.

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, Turkey 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13338:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 13338:2022) 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 December 2022, and conflicting national standards
shall be withdrawn at the latest by December 2022.
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 13338:2020.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 13338:2022 has been approved by CEN as EN ISO 13338:2022 without any modification.

INTERNATIONAL ISO
STANDARD 13338
Third edition
2022-05
Gas cylinders — Gases and gas
mixtures — Determination of
corrosiveness for the selection of
cylinder valve outlet
Bouteilles à gaz — Gaz et mélanges de gaz — Détermination de la
corrosivité pour le choix des raccords de sortie de robinets
Reference number
ISO 13338:2022(E)
ISO 13338:2022(E)
© 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.
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 13338:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 1
5 Categories of corrosiveness for pure gases . 2
6 Corrosiveness of gas mixtures — Calculation method. 5
Bibliography . 7
iii
ISO 13338:2022(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 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 third edition cancels and replaces the second edition (ISO 13338:2017), which has been technically
revised. The main changes are as follows:
— the corrosiveness of gases and gases mixtures has been clarified;
— the definition of FTSC codes for corrosiveness gases and gas mixtures has been clarified in Clause 4;
— minor editorial changes have been made in Table 1.
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 13338:2022(E)
Introduction
ISO 5145 specifies the dimensions of different valve outlets for different compatible gas groups. These
compatible gas groups are determined according to practical criteria defined in ISO 14456.
These criteria are based on certain physical, chemical, toxic and corrosive properties of the gases. In
particular, the gas corrosiveness is considered in this document.
The aim of this document is to assign a classification category for each gas that takes into account the
tissue corrosiveness of the gas for skin, eyes and the respiratory tract as well as the potential for a
corrosiveness related acid/base chemical reaction.
For gas mixtures containing corrosive components, a calculation method based on the additivity
[3]
method of the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) is
proposed.
However, for gas mixtures containing corrosive gas components, some valve outlets standards require
the use of the corrosive category regardless of the corrosive gas concentration.
v
INTERNATIONAL STANDARD ISO 13338:2022(E)
Gas cylinders — Gases and gas mixtures — Determination
of corrosiveness for the selection of cylinder valve outlet
1 Scope
This document specifies the following, in order to determine the corrosiveness of gases and gas
mixtures so that a suitable outlet connection can be assigned to each of them:
— for pure gases and some liquids, a complete list indicating their corrosiveness;
— for gas mixtures, a calculation method, in the absence of experimental data, relating to the
corrosiveness of each of their components.
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
tissue corrosiveness
ability of a gas to damage or destroy living tissues (eyes, skin and mucous
membranes)
Note 1 to entry: It corresponds to GHS hazard class “Skin corrosion/irritation” Cat. 1, 1A, 1B or 1C, or to GHS
hazard class “Serious eye damage/eye irritation”, Cat. 1.
3.2
irritant
property of a gas which can cause a temporary reaction to the skin, eyes and mucous membranes
Note 1 to entry: It corresponds to GHS hazard class “Skin corrosion/irritation”, Cat. 2, or to GHS hazard class
“Serious eye damage/eye irritation”, Cat. 2.
4 Classification
Gas cylinder connections should take into account all aspects of corrosiveness as reflected in the
subdivisions of the C code of the FTSC code (which includes tissue corrosiveness and acid/base chemical
reactivity). The subdivisions of the FTSC code are given below and repeated in the footer of Table 1:
— 0: non-corrosive;
— 1: non-halogen acid forming;
— 2: basic;
— 3: halogen acid forming.
ISO 13338:2022(E)
In addition, gases and gas mixtures are classified into the following tissue corrosiveness categories:
— C: corrosive (irreve
...