EN ISO 15615:2013

SLOVENSKI STANDARD
01-julij-2013
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SIST EN ISO 15615:2003
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Gas welding equipment - Acetylene manifold systems for welding, cutting and allied
processes - Safety requirements in high-pressure devices (ISO 15615:2013)
Gasschweißgeräte - Acetylenflaschen-Batterieanlagen für Schweißen, Schneiden und
verwandte Prozesse - Sicherheitsanforderungen für Hochdruckeinrichtungen (ISO
15615:2013)
Matériel de soudage aux gaz - Centrales de détente pour la distribution d'acétylène pour
le soudage, le coupage et les techniques connexes - Exigences de sécurité pour les
dispositifs haute pression (ISO 15615:2013)
Ta slovenski standard je istoveten z: EN ISO 15615:2013
ICS:
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 15615
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2013
ICS 25.160.30 Supersedes EN ISO 15615:2002
English Version
Gas welding equipment - Acetylene manifold systems for
welding, cutting and allied processes - Safety requirements in
high-pressure devices (ISO 15615:2013)
Matériel de soudage aux gaz - Centrales de détente pour la Gasschweißgeräte - Acetylenflaschen-Batterieanlagen für
distribution d'acétylène pour le soudage, le coupage et les Schweißen, Schneiden und verwandte Prozesse -
techniques connexes - Exigences de sécurité pour les Sicherheitsanforderungen für Hochdruckeinrichtungen (ISO
dispositifs haute pression (ISO 15615:2013) 15615:2013)
This European Standard was approved by CEN on 9 February 2013.

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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15615:2013: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 15615:2013) has been prepared by Technical Committee ISO/TC 44 "Welding and
allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding” 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 October 2013, and conflicting national standards shall be withdrawn at
the latest by October 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 15615:2002.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 15615:2013 has been approved by CEN as EN ISO 15615:2013 without any modification.

INTERNATIONAL ISO
STANDARD 15615
Second edition
2013-04-15
Gas welding equipment — Acetylene
manifold systems for welding,
cutting and allied processes — Safety
requirements in high-pressure devices
Matériel de soudage aux gaz — Centrales de détente pour la
distribution d’acétylène pour le soudage, le coupage et les techniques
connexes — Exigences de sécurité pour les dispositifs haute pression
Reference number
ISO 15615:2013(E)
©
ISO 2013
ISO 15615:2013(E)
© ISO 2013
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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 15615:2013(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design . 2
5 Requirements . 2
5.1 General . 2
5.2 General requirements . 2
5.3 Additional requirements to be met by specific types of device . 3
6 Type tests . 4
6.1 General . 4
6.2 Reference values and accuracy of instruments . 4
6.3 Test gases . 5
6.4 Acetylene decomposition test . 5
6.5 Pressure resistance test . 6
6.6 Non-return valve test . 6
6.7 Endurance test . 7
6.8 Trip pressure test for automatic pressure-actuated shut-off valves . 8
6.9 Internal gas leakage test . 9
7 Manufacturer’s instructions . 9
8 Marking . 9
Annex A (normative) Summary of tests .10
Bibliography .16
ISO 15615:2013(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 15615 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 8, Equipment for gas welding, cutting and allied processes.
This second edition cancels and replaces the first edition (ISO 15615:2002), which has been
technically revised.
Requests for official interpretations of any aspect of this International Standard 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 2013 – All rights reserved

INTERNATIONAL STANDARD ISO 15615:2013(E)
Gas welding equipment — Acetylene manifold systems
for welding, cutting and allied processes — Safety
requirements in high-pressure devices
1 Scope
This International Standard establishes the general specifications, requirements and tests for devices
located on the high-pressure side of acetylene manifold systems as defined in ISO 14114. It does not
cover the high-pressure piping, flexible hoses and the regulator.
NOTE The terms “upstream” and “downstream” refer to the normal direction of gas flow in the device.
2 Normative references
The following referenced documents are indispensable for the application 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 2503:2009, Gas welding equipment — Pressure regulators and pressure regulators with flow-metering
devices for gas cylinders used in welding, cutting and allied processes up to 300 bar (30 MPa)
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 10297, Gas cylinders — Cylinder valves — Specification and type testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
non-return valve
device which prevents passage of gas in the direction opposite to flow
[ISO 15296:2004]
3.2
manual quick-acting shut-off valve
manually activated device to quickly stop the gas flow
[ISO 15296:2004]
3.3
automatic quick-acting shut-off device
self-acting device which closes quickly, e.g. when triggered by an acetylene explosion in the high-
pressure manifold pipework
[ISO 15296:2004]
3.4
remotely actuated shut-off valve
quick-acting shut-off valve which quickly stops the gas flow when remotely triggered
ISO 15615:2013(E)
3.5
automatic pressure-actuated shut-off valve
device which automatically stops the gas supply to the regulator when the downstream pressure rises
above the maximum operating pressure
3.6
three-way valve
device which allows gas flow from one side of the high-pressure manifold to enter the regulator while
isolating flow from the second side
Note 1 to entry: Its position can be reversed so that gas flows from the second side while the first side is isolated.
It prevents simultaneous flow from both sides.
3.7
stop valve
device to prevent, when closed, the flow of gas
3.8
multifunctional safety device
device which incorporates two or more of the safety functions
[ISO 15296:2004]
3.9
pressure gauge
device which shows the actual pressure of the assembly (digital or analogue readouts) (e.g. used in the
high-pressure line of manifold systems or in pressure regulators for manifold systems.)
4 Design
Components within the devices should be designed to remain at the same electrostatic potential as the
body of the device during operation. All metal components in contact with gas should be electrically
continuous to prevent static electricity discharges.
5 Requirements
5.1 General
The general requirements (see 5.2) apply to all the devices defined in Clause 3. The multifunctional
safety devices shall meet the general and additional requirements corresponding to each function.
5.2 General requirements
5.2.1 Materials
Materials used for devices shall be in accordance with ISO 9539.
5.2.2 External gas tightness
The general requirements on external gas tightness shall be in accordance with ISO 9090 at all times,
before and after the tests.
2 © ISO 2013 – All rights reserved

ISO 15615:2013(E)
5.2.3 Internal gas tightness
Where internal gas tightness is required in this International Standard, the leakage rate shall not exceed
3 2
50 cm /h for devices with a connection internal bore (diameter) less than 11 mm, or less than 0,41d for
larger diameters. See 6.9 for test details.
2 3
NOTE The expression 0,41d gives the value of the flow in cm /h when d is the internal bore (diameter),
in mm, of the largest connection in the device.
5.2.4 Internal gas tightness after decomposition test
Where internal gas tightness is required after acetylene decomposition, the leakage rate shall not exceed
50 l/h. See 6.9 for test details.
5.2.5 Pressure resistance
The housings of the devices shall withstand a pressure of 31,5 MPa (315 bar) for 5 min without any observed
leakage. After pressurization, there shall be no visible permanent deformation. See 6.5 for test details.
5.2.6 Acetylene decomposition
After the device has been tested with decomposition at 2,5 MPa initial pressure in accordance with 6.4,
there shall be no visible permanent deformation of the device. No escape of gas shall occur during the
test. Destruction of inner parts is permitted.
5.3 Additional requirements to be met by specific types of device
5.3.1 Non-return valve
Non-return valves shall not allow the reverse flow of gas greater than 150 cm /h (0,15 l/h) when tested
in accordance with 6.6.1 and 6.6.2, both before and after the 2 000-cycle fatigue test (see 6.6.3).
This requirement does not apply to the non-return valve after it has been subjected to the acetylene
decomposition test.
5.3.2 Manual quick-acting shut-off valve
The decomposition test shall be carried out in the open position. Manual quick-acting shut-off valves
shall meet the requirements of 5.2.3 before and after the endurance test (see 6.7). In the case of turn-
acting valves, they shall not require more than half of a turn to close. See 6.7 for endurance test details.
For valves with handwheels, the closing torque applied for the decomposition test shall be the endurance
test torque as defined in the endurance test for cylinder valves in ISO 10297.
5.3.3 Automatic quick-acting shut-off device
Automatic quick-acting shut-off devices shall be triggered by an acetylene decomposition at 0,6 MPa
(6 bar) and 2,5 MPa (25 bar). After tripping by acetylene decomposition, the internal gas leakage shall
meet the requirements of 5.2.4.
5.3.4 Remotely actuated shut-off valve
Remotely actuated shut-off valves shall be triggered by an acetylene decomposition at 0,6 MPa (6 bar)
and 2,5 MPa (25 bar). Remotely actuated shut-off valves shall meet the requirements of 5.2.3 before the
decomposition test (see 6.4) and after the endurance test. See 6.7 for endurance test details.
ISO 15615:2013(E)
5.3.5 Automatic pressure-actuated shut-off valve
Automatic pressure-actuated shut-off valves shall be triggered (stop gas flow on high-pressure side)
at a pressure on the low-pressure signal port between 0,16 MPa and 0,20 MPa (1,6 bar and 2,0 bar) at
both 0,1 MPa and 2,5 MPa (1 bar and 25 bar) on the high-pressure side. When triggered, the interna
...