Gas welding equipment - Safety devices - Part 1: Devices incorporating a flame (flashback) arrestor (ISO 5175-1:2017)

This Part of this European Standard specifies the general requirements and tests for safety devices for fuel gases and oxygen or compressed air incorporating a flame (flashback) arrestor used downstream of manifold, cylinder and (or) pipeline outlet regulators, and upstream of blowpipes for welding, cutting and allied processes. This standard does not specify the location of these devices in the gas system. This standard does not include requirements for safety devices which do not incorporate a flame arrestor which are covered by EN 730-2. This standard does not cover the use of safety devices incorporating flame arrestors for applications with premixed oxy/fuel or air/fuel gas supply systems, for example downstream of gas mixers or a generator to produce hydrogen/oxygen mixture by electrolytic decomposition of water.

Gasschweißgeräte - Sicherheitseinrichtungen - Teil 1: Mit integrierter Flammensperre (ISO 5175-1:2017)

Dieses Dokument enthält die allgemeinen Anforderungen und Prüfungen für Sicherheitseinrichtungen für Brenngase und Sauerstoff oder Druckluft mit integrierter Flammensperre, die abströmseitig von Hauptstellen-, Flaschen- und/oder Leitungsdruckreglern und anströmseitig von Brennern für Schweißen, Schneiden und verwandte Prozesse angewendet werden.
Dieses Dokument macht keine Angaben über die Anordnung der Einrichtungen im Gassystem.
Dieses Dokument gilt nicht für Sicherheitseinrichtungen, die keine integrierte Flammensperre enthalten. Diese werden von ISO 5175-2 abgedeckt.
Dieses Dokument gilt nicht für die Verwendung von Sicherheitseinrichtungen mit integrierter Flammensperre für Anwendungen mit Gasversorgungssystemen für vorgemischte Sauerstoff/Brenngas- oder Luft/Brenngas-Gemische, z. B. abströmseitig von Gasmischern oder Gaserzeugern zur Herstellung von Wasserstoff/Sauerstoff-Gemischen durch elektrolytische Zersetzung von Wasser.

Matériel de soudage au gaz - Dispositifs de sécurité - Partie 1: Dispositifs avec arrêt de flamme (ISO 5175-1:2017)

ISO 5175-1:2017 spécifie les exigences générales et les essais des dispositifs de sécurité pour les gaz combustibles et l'oxygène ou l'air comprimé, avec arrêt de flamme (retour de flamme), utilisés en aval des centrales de détente, des détendeurs pour bouteilles et (ou) canalisations, et en amont des chalumeaux pour le soudage, le coupage et les techniques connexes.
ISO 5175-1:2017 ne spécifie pas la position de ces dispositifs dans la distribution du gaz.
ISO 5175-1:2017 ne s'applique pas aux dispositifs de sécurité sans arrêt de flamme couverts par l'ISO 5175‑2.
ISO 5175-1:2017 ne s'applique pas à l'utilisation de dispositifs de sécurité avec arrêt de flamme destinés à des applications comportant une alimentation de pré-mélange d'oxygène/gaz combustible ou d'air/gaz combustible, par exemple en aval de mélangeurs de gaz, ou d'un générateur prévu pour produire un mélange hydrogène/oxygène par décomposition électrolytique de l'eau.

Oprema za plamensko varjenje - Varnostne naprave - 1. del: Naprave z vgrajeno varovalko proti povratnemu udaru (ISO 5175-1:2017)

Ta del evropskega standarda določa splošne zahteve in preskuse za varnostne naprave za gorivne pline in kisik ali stisnjeni zrak z vgrajeno varovalko proti povratnemu udaru v smeri stran od regulatorjev v razdelilnikih, cilindrih in/ali dovodih cevi ter v smeri proti gorilnikom za varjenje, rezanje in sorodne postopke. Ta standard ne določa položajev teh naprav v plinskem sistemu. Ta standard ne vključuje zahtev za varnostne naprave brez vgrajene varovalke proti povratnemu udaru, ki so zajete v standardu EN 730-2. Ta standard ne zajema uporabe varnostnih naprav z vgrajeno varovalko proti povratnemu udaru s sistemi za dovod predhodno zmešanih plinskih mešanic kisika in goriva ali zraka in goriva, na primer v smeri stran od mešalnikov plina ali generatorja za pridobivanje mešanice vodika in kisika z elektrolitsko razgradnjo vode.

General Information

Status
Published
Public Enquiry End Date
21-Apr-2016
Publication Date
11-Jan-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
08-Jan-2018
Due Date
15-Mar-2018
Completion Date
12-Jan-2018

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 5175-1:2018
01-februar-2018
1DGRPHãþD
SIST EN 730-1:2003
Oprema za plamensko varjenje - Varnostne naprave - 1. del: Naprave z vgrajeno
varovalko proti povratnemu udaru (ISO 5175-1:2017)
Gas welding equipment - Safety devices - Part 1: Devices incorporating a flame
(flashback) arrestor (ISO 5175-1:2017)
Gasschweißgeräte - Sicherheitseinrichtungen - Teil 1: Mit integrierter Flammensperre
(ISO 5175-1:2017)
Matériel de soudage au gaz - Dispositifs de sécurité - Partie 1: Dispositifs avec arrêt de
flamme (ISO 5175-1:2017)
Ta slovenski standard je istoveten z: EN ISO 5175-1:2017
ICS:
25.160.30 Varilna oprema Welding equipment
SIST EN ISO 5175-1:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 5175-1:2018

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SIST EN ISO 5175-1:2018


EN ISO 5175-1
EUROPEAN STANDARD

NORME EUROPÉENNE

November 2017
EUROPÄISCHE NORM
ICS 25.160.30
English Version

Gas welding equipment - Safety devices - Part 1: Devices
incorporating a flame (flashback) arrestor (ISO 5175-
1:2017)
Matériel de soudage au gaz - Dispositifs de sécurité - Gasschweißgeräte - Sicherheitseinrichtungen - Teil 1:
Partie 1: Dispositifs avec arrêt de flamme (ISO 5175- Mit integrierter Flammensperre (ISO 5175-1:2017)
1:2017)
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 5175-1:2017 E
worldwide for CEN national Members.

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SIST EN ISO 5175-1:2018
EN ISO 5175-1:2017 (E)
Contents Page
European foreword . 3
2

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SIST EN ISO 5175-1:2018
EN ISO 5175-1:2017 (E)
European foreword
This document (EN ISO 5175-1:2017) 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 730-1:2002.
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 5175-1:2017 has been approved by CEN as EN ISO 5175-1:2017 without any
modification.

3

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SIST EN ISO 5175-1:2018

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SIST EN ISO 5175-1:2018
INTERNATIONAL ISO
STANDARD 5175-1
Second edition
2017-09
Gas welding equipment — Safety
devices —
Part 1:
Devices incorporating a flame
(flashback) arrestor
Matériel de soudage au gaz — Dispositifs de sécurité —
Partie 1: Dispositifs avec arrêt de flamme
Reference number
ISO 5175-1:2017(E)
©
ISO 2017

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SIST EN ISO 5175-1:2018
ISO 5175-1:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© 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

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SIST EN ISO 5175-1:2018
ISO 5175-1:2017(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design and materials . 4
4.1 Connection . 4
4.2 Materials . 4
5 Requirements . 4
5.1 General . 4
5.2 Gas tightness . 5
5.3 Pressure resistance . 6
5.4 Flame arrestor . 6
5.5 Flame arrestor with non-return valve . 6
5.6 Flame arrestor with temperature-sensitive cut-off valve . 6
5.7 Flame arrestor with pressure-sensitive cut-off valve . 6
5.8 Other multifunctional safety devices . 6
6 Methods for type testing . 6
6.1 General . 6
6.2 Accuracy of pressure and flow measurements . 7
6.3 Test gases . 7
6.4 Gas tightness test . 7
6.5 Pressure resistance test . 7
6.6 Non-return valve test . 7
6.7 Flame arrestor test . 8
6.8 Temperature-sensitive cut-off valve test . 9
6.9 Pressure-sensitive cut-off valve test .10
6.10 Internal leakage test for cut-off valves .10
7 Further tests .10
8 Manufacturer’s instructions .10
9 Marking .11
Annex A (informative) Gas flow measurement .12
Annex B (informative) Third party testing information .14
Annex C (informative) Production tests .15
© ISO 2017 – All rights reserved iii

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SIST EN ISO 5175-1:2018
ISO 5175-1:2017(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 5175-1, together with ISO 5175-2, 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

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SIST EN ISO 5175-1:2018
INTERNATIONAL STANDARD ISO 5175-1:2017(E)
Gas welding equipment — Safety devices —
Part 1:
Devices incorporating a flame (flashback) arrestor
1 Scope
This document specifies the general requirements and tests for safety devices for fuel gases and oxygen
or compressed air incorporating a flame (flashback) arrestor used downstream of manifold, cylinder
and/or pipeline outlet regulators, and upstream of blowpipes for welding, cutting and allied processes.
This document does not specify the location of these devices in the gas system.
This document is not applicable to safety devices not incorporating a flame arrestor, covered by
ISO 5175-2.
This document does not apply to the use of safety devices incorporating flame arrestors for applications
with premixed oxy/fuel or air/fuel gas supply systems, e.g. downstream of gas mixers or a generator to
produce hydrogen/oxygen mixture by electrolytic decomposition of water.
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 554, Standard atmospheres for conditioning and/or testing — Specifications
ISO 5175-2, Gas welding equipment — Safety devices — Part 2: Not incorporating a flame (flashback)
arrestor
ISO 7289, Gas welding equipment — Quick-action couplings with shut-off valves for welding, cutting and
allied processes
ISO 9090, Gas tightness of equipment for gas welding and allied processes
ISO 9539, Gas welding equipment — Materials for equipment used in gas welding, cutting and allied
processes
ISO 10225, Gas welding equipment — Marking for equipment used for gas welding, cutting and allied
processes
ISO 15296, Gas welding equipment —Vocabulary
EN 560, Gas welding equipment — Hose connections for equipment for welding, cutting and allied processes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 15296 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
© ISO 2017 – All rights reserved 1

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SIST EN ISO 5175-1:2018
ISO 5175-1:2017(E)

3.1
flame arrestor
device which arrests a flame front
EXAMPLE The good thermal conductivity, high porosity and small pore size (larger surface) of sintered
metal elements lead to flame quenching. An example is given in Figure 1.

Key
1 normal direction of gas flow
2 e.g. sintered metal element
3 flame
Figure 1 — Flame arrestor (example)
3.2
maximum operating pressure
maximum pressure to which the equipment may be subjected in service
3.3
multifunctional safety device
device that incorporates two or more of the safety functions
EXAMPLE Flame arrestor (3.1) with non-return valve (3.4) and cut-off valve.
Note 1 to entry: The temperature-sensitive cut-off valve (3.6) is normally used in combination with a flame
arrestor as its purpose is to cut-off the gas flow before the temperature at the flame arrestor reaches a point
where flame transmission across the flame arrestor takes place. It is normal for pressure and or temperature cut-
off valves only to be used in combination with flame arrestors. Due to the burning characteristics of hydrogen, it
is recommended that all flame arrestors for hydrogen incorporate a temperature-sensitive cut-off valve.
3.4
non-return valve
device that prevents passage of gas in the direction opposite to the intended flow
EXAMPLE Valve is held open by energy in gas stream and closes when downstream pressure is approximately
equal to or greater than that in normal direction of flow. An example is given in Figure 2.

2 © ISO 2017 – All rights reserved

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SIST EN ISO 5175-1:2018
ISO 5175-1:2017(E)

Key
1 normal direction of gas flow
Figure 2 — Non-return valve (e
...

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