EN ISO 5175-2:2017

SLOVENSKI STANDARD
01-februar-2018
1DGRPHãþD
SIST EN 730-2:2003
Oprema za plamensko varjenje - Varnostne naprave - 2. del: Naprave brez vgrajene
varovalke proti povratnemu udaru (ISO 5175-2:2017)
Gas welding equipment - Safety devices - Part 2: Not incorporating a flame (flashback)
arrestor (ISO 5175-2:2017)
Gasschweißgeräte - Sicherheitseinrichtungen - Teil 2: Ohne integrierte Flammensperre
(ISO 5175-2:2017)
Matériel de soudage au gaz - Dispositifs de sécurité - Partie 2: Sans arrêt de flamme
(ISO 5175-2:2017)
Ta slovenski standard je istoveten z: EN ISO 5175-2:2017
ICS:
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 5175-2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2017
EUROPÄISCHE NORM
ICS 25.160.30 Supersedes EN 730-2:2002
English Version
Gas welding equipment - Safety devices - Part 2: Not
incorporating a flame (flashback) arrestor (ISO 5175-
2:2017)
Matériel de soudage au gaz - Dispositifs de sécurité - Gasschweißgeräte - Sicherheitseinrichtungen - Teil 2:
Partie 2: Sans arrêt de flamme (ISO 5175-2:2017) Ohne integrierte Flammensperre (ISO 5175-2:2017)
This European Standard was approved by CEN on 20 November 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5175-2:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 5175-2:2017) has been prepared by Technical Committee ISO/TC 44 “Welding
and allied processes” in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” the secretariat of which is held by DIN.
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 May 2018, and conflicting national standards shall be
withdrawn at the latest by May 2018.
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 730-2:2002.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 5175-2:2017 has been approved by CEN as EN ISO 5175-2:2017 without any
modification.
INTERNATIONAL ISO
STANDARD 5175-2
First edition
2017-09
Gas welding equipment — Safety
devices —
Part 2:
Devices not incorporating a flame
(flashback) arrestor
Matériel de soudage au gaz — Dispositifs de sécurité —
Partie 2: Dispositifs sans arrêt de flamme
Reference number
ISO 5175-2:2017(E)
©
ISO 2017
ISO 5175-2:2017(E)
© ISO 2017, 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
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

ISO 5175-2:2017(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design and materials . 3
4.1 Connections . 3
4.2 Materials . 3
5 Requirements . 4
5.1 General . 4
5.2 Gas tightness . 4
5.3 Pressure resistance . 4
5.4 Non-return valve . 4
5.5 Pressure relief valves . 5
5.6 Excess flow cut-off valves . 5
5.7 Flashback resistance . 5
6 Methods for type testing . 5
6.1 General . 5
6.2 Accuracy of pressure and flow measurements . 5
6.3 Test gases . 5
6.4 Gas tightness test . 6
6.5 Pressure resistance test . 6
6.6 Non-return valve test . 6
6.7 Pressure relief valves . 6
6.8 Excess flow cut-off valve . 6
6.9 Internal leakage test for cut-off valves . 7
7 Manufacturer’s instructions . 7
8 Marking . 7
Annex A (informative) Gas flow measurement . 9
Annex B (informative) Third party testing information .11
ISO 5175-2:2017(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 on 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 the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes,
Subcommittee SC 8, Equipment for gas welding, cutting and allied processes.
This first edition of ISO 5175-2, together with ISO 5175-1, cancels and replaces ISO 5175:1987, which has
been technically revised. It also incorporates the Amendment ISO 5175:1987/Amd 1:2015.
A list of all parts in the ISO 5175 series can be found on the ISO website.
Requests for official interpretations of any aspect of this document should be directed to the Secretariat
of ISO/TC 44/SC 8 via your national standards body. A complete listing of these bodies can be found at
www.iso.org.
iv © ISO 2017 – All rights reserved

INTERNATIONAL STANDARD ISO 5175-2:2017(E)
Gas welding equipment — Safety devices —
Part 2:
Devices not incorporating a flame (flashback) arrestor
1 Scope
This document specifi
...