SIST EN ISO 16964:2020
(Main)Gas cylinders - Flexible hoses assemblies - Specification and testing (ISO 16964:2019)
Gas cylinders - Flexible hoses assemblies - Specification and testing (ISO 16964:2019)
This document provides specification and testing requirements for high pressure flexible hose assemblies intended to be connected to gas cylinders, bundles of cylinders or trailers (battery vehicles), and MEGCs for use when filling and emptying gas at production sites and also for customer use. This document applies to flexible hose assemblies with rated pressures up to 1 000 bar for use in the temperature range of −40 °C to +65 °C.
This document is not applicable to:
— rubber and plastics flexible hose assemblies for welding, cutting and related processes up to 45 MPa (450 bar) for customer use (see ISO 14113);
— high pressure flexible hose assemblies for use with medical gas systems for customer use (see ISO 21969);
— low pressure hose assemblies for use with medical gases for customer use (see ISO 5359);
— rubber and thermoplastic low pressure hose assemblies for welding, cutting and related processes for customer use (see ISO 3821 or ISO 12170);
— flexible hose assemblies for cryogenic applications (see ISO 21012);
— flexible hose assemblies for liquid petroleum gas (LPG).
NOTE Flexible hose assembly designs which pass the type test approval described in this document can have a lower ratio of burst pressure to rated pressure than stated in other standards.
Gasflaschen - Flexible Schlauchleitungen - Spezifikation und Prüfung (ISO 16964:2019)
Dieses Dokument enthält Anforderungen an die Spezifikation und Prüfung von flexiblen Hochdruck-schlauchleitungen für den Anschluss an Gasflaschen, Flaschenbündel oder Anhänger (Batteriefahrzeuge) und MEGC zur Verwendung beim Befüllen mit und Entleeren von Gas an Fertigungsstätten sowie zur Verwendung durch den Kunden. Dieses Dokument gilt für flexible Schlauchleitungen mit Nenndrücken bis 1 000 bar zur Verwendung im Temperaturbereich von −40 °C bis +65 °C.
Dieses Dokument gilt nicht für:
- Gummi- und Kunststoff-Schlauchleitungen zum Schweißen, Schneiden und für verwandte Prozesse bis 45 MPa (450 bar) zur Verwendung durch den Kunden (siehe ISO 14113);
- flexible Hochdruck-Schlauchleitungen zur Verwendung mit Systemen für medizinische Gase durch den Kunden (siehe ISO 21969);
- Niederdruck-Schlauchleitungen zur Verwendung mit medizinischen Gasen durch den Kunden (siehe ISO 5359);
- Niederdruck-Schlauchleitungen aus Gummi und thermoplastischen Kunststoffen zum Schweißen, Schneiden und für verwandte Prozesse zur Verwendung durch den Kunden (siehe ISO 3821 oder ISO 12170);
- flexible Schlauchleitungen für Kryo-Anwendungen (siehe ISO 21012);
- flexible Schlauchleitungen für Flüssiggas (LPG, en: liquefied petroleum gas).
ANMERKUNG Ausführungen von flexiblen Schlauchleitungen, welche die in diesem Dokument beschriebene Prüfung zur Baumusterzulassung bestehen, können ein geringeres Verhältnis von Berstdruck zu Nenndruck aufweisen, als in anderen Normen angegeben.
Bouteilles à gaz - Flexibles - Spécifications et essais (ISO 16964:2019)
Le présent document fournit des spécifications et des exigences d'essai pour les flexibles hautes pressions destinés à être raccordés à des bouteilles à gaz, des cadres de bouteilles ou des remorques (véhicules batteries), et à des CGEM lorsqu'ils sont utilisés pour remplir et vider le gaz sur les sites de production et aussi en cas d'utilisation par le client. Le présent document s'applique aux flexibles avec des pressions nominales allant jusqu'à 1 000 bar destinés à être utilisés dans la plage de températures de −40 °C à +65 °C.
Le présent document n'est pas applicable:
— aux flexibles en caoutchouc et en plastique pour le soudage, le coupage et les techniques connexes allant jusqu'à 45 MPa (450 bar) pour utilisation par le client (voir l'ISO 14113);
— aux flexibles haute pression à utiliser avec des systèmes de gaz médicaux pour utilisation par le client (voir l'ISO 21969);
— aux flexibles basse pression à utiliser avec des gaz médicaux pour utilisation par le client (voir l'ISO 5359);
— aux flexibles basse pression en caoutchouc et en thermoplastique pour le soudage, le coupage et les techniques connexes pour utilisation par le client (voir l'ISO 3821 ou l'ISO 12170);
— aux flexibles pour les applications cryogéniques (voir l'ISO 21012);
— aux flexibles pour le gaz de pétrole liquéfié (GPL).
NOTE Pour les conceptions de flexibles qui satisfont à l'agrément de type décrit dans le présent document, il est possible que le rapport de la pression de rupture sur la pression nominale soit inférieur à celui indiqué dans d'autres normes.
Plinske jeklenke - Gibke cevi in sklopi - Specifikacija in preskušanje (ISO 16964:2019)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 16964:2020
01-julij-2020
Plinske jeklenke - Gibke cevi in sklopi - Specifikacija in preskušanje (ISO
16964:2019)
Gas cylinders - Flexible hoses assemblies - Specification and testing (ISO 16964:2019)
Gasflaschen - Flexible Schlauchleitungen - Spezifikation und Prüfung (ISO 16964:2019)
Bouteilles à gaz - Flexibles - Spécifications et essais (ISO 16964:2019)
Ta slovenski standard je istoveten z: EN ISO 16964:2020
ICS:
23.020.35 Plinske jeklenke Gas cylinders
83.140.40 Gumene cevi Hoses
SIST EN ISO 16964:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 16964:2020
---------------------- Page: 2 ----------------------
SIST EN ISO 16964:2020
EN ISO 16964
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2020
EUROPÄISCHE NORM
ICS 23.020.35; 83.140.40
English Version
Gas cylinders - Flexible hoses assemblies - Specification
and testing (ISO 16964:2019)
Bouteilles à gaz - Flexibles - Spécifications et essais Gasflaschen - Flexible Schlauchleitungen - Spezifikation
(ISO 16964:2019) und Prüfung (ISO 16964:2019)
This European Standard was approved by CEN on 13 April 2020.
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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16964:2020 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 16964:2020
EN ISO 16964:2020 (E)
Contents Page
European foreword . 3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 16964:2020
EN ISO 16964:2020 (E)
European foreword
The text of ISO 16964:2019 has been prepared by Technical Committee ISO/TC 58 "Gas cylinders” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO 16964:2020
by 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 October 2020, and conflicting national standards shall
be withdrawn at the latest by October 2020.
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.
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 16964:2019 has been approved by CEN as EN ISO 16964:2020 without any modification.
3
---------------------- Page: 5 ----------------------
SIST EN ISO 16964:2020
---------------------- Page: 6 ----------------------
SIST EN ISO 16964:2020
INTERNATIONAL ISO
STANDARD 16964
Second edition
2019-01
Gas cylinders — Flexible hoses
assemblies — Specification and testing
Bouteilles à gaz — Flexibles — Spécifications et essais
Reference number
ISO 16964:2019(E)
©
ISO 2019
---------------------- Page: 7 ----------------------
SIST EN ISO 16964:2020
ISO 16964:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 16964:2020
ISO 16964:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Production pressure tests . 2
4.1.1 Strength test . 2
4.1.2 Leak test . 2
4.2 Type tests . 2
4.2.1 General. 2
4.2.2 Burst pressure test (3 samples per type) . 3
4.2.3 Pressure cycle test (3 samples per type) . 3
4.2.4 Oxygen compatibility test (3 samples per type). 4
4.2.5 Acetylene compatibility test (3 samples) . 4
4.2.6 Gas material compatibility . 4
4.2.7 Test of the safety cable (2 samples) . 4
4.2.8 Additional tests . 5
5 Marking . 6
Annex A (informative) Examples of kink test, side impact test and torsion test .7
Bibliography .14
© ISO 2019 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 16964:2020
ISO 16964:2019(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.
This second edition cancels and replaces the first edition (ISO 16964:2015), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Test 1 for the safety cable has been clarified;
— the leak test has been corrected;
— the pressure cycle test has been clarified;
— the test apparatus for the torsion test, as shown in Figures A.6 and A.7 has been clarified.
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 2019 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 16964:2020
ISO 16964:2019(E)
Introduction
Flexible hose assemblies are used to transfer industrial and medical gases into cylinders, bundles,
MEGCs and trailers (battery vehicles), and also to supply such gases to user equipment.
There is a range of existing International Standards to be used for specific applications or hose
construction:
— ISO 14113 which covers hoses made with internal rubber or plastics tubing and used to supply gases
to customers for welding applications;
— ISO 21969 which covers hoses with an internal corrugated metallic liner and used to supply medical
gases to customers;
— ISO 10380 which covers hoses with internal corrugated metallic liner for all applications including
non-industrial and medical gases.
ISO 14113 and ISO 21969 cover only specific customer applications and are intended to be used
accordingly, while ISO 10380 is general in its approach.
The intent of the document is to describe flexible hoses not defined in the specific applications
documents mentioned above.
© ISO 2019 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 16964:2020
---------------------- Page: 12 ----------------------
SIST EN ISO 16964:2020
INTERNATIONAL STANDARD ISO 16964:2019(E)
Gas cylinders — Flexible hoses assemblies — Specification
and testing
1 Scope
This document provides specification and testing requirements for high pressure flexible hose
assemblies intended to be connected to gas cylinders, bundles of cylinders or trailers (battery vehicles),
and MEGCs for use when filling and emptying gas at production sites and also for customer use. This
document applies to flexible hose assemblies with rated pressures up to 1 000 bar for use in the
temperature range of −40 °C to +65 °C.
This document is not applicable to:
— rubber and plastics flexible hose assemblies for welding, cutting and related processes up to 45 MPa
(450 bar) for customer use (see ISO 14113);
— high pressure flexible hose assemblies for use with medical gas systems for customer use (see
ISO 21969);
— low pressure hose assemblies for use with medical gases for customer use (see ISO 5359);
— rubber and thermoplastic low pressure hose assemblies for welding, cutting and related processes
for customer use (see ISO 3821 or ISO 12170);
— flexible hose assemblies for cryogenic applications (see ISO 21012);
— flexible hose assemblies for liquid petroleum gas (LPG).
NOTE Flexible hose assembly designs which pass the type test approval described in this document can
have a lower ratio of burst pressure to rated pressure than stated in other standards.
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 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
ISO 10286, Gas cylinders — Terminology
ISO 10380, Pipework — Corrugated metal hoses and hose assemblies
ISO 14113:2013, Gas welding equipment — Rubber and plastics hose and hose assemblies for use with
industrial gases up to 450 bar (45 MPa)
ISO 21969:2009, High-pressure flexible connections for use with medical gas systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10286 and the following 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
© ISO 2019 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 16964:2020
ISO 16964:2019(E)
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
rated pressure
PR
pressure of a hose assembly equal to 1,25 PW, PW being the working pressure of the cylinder as defined
in ISO 10286
Note 1 to entry: National and international design codes for pressure systems can specify a higher value of rated
pressure.
Note 2 to entry: When cylinders are used (e.g. during filling or product withdrawal), the gas temperature can be
higher than 15 °C. This is the reason why the rated pressure is higher than the cylinder working pressure.
3.2
burst pressure
highest pressure reached in a flexible hose assembly during a burst test
4 Requirements
4.1 Production pressure tests
4.1.1 Strength test
Each flexible hose assembly shall first be subjected to a strength test using oil-free water at a pressure
at least equal to 1,5 times the rated pressure, PR, for a minimum of 3 min. There shall be no visible
sign of leakage, permanent deformation or other sign of failure. Where hydraulic testing would result
in unacceptable contamination of the flexible hose assembly, the hydraulic test may be replaced by
a pneumatic test using a compatible medium such as dry oil-free air or nitrogen. Appropriate safety
measures shall be taken to protect personnel and equipment during testing.
4.1.2 Leak test
Each hose or hose assembly shall be tested for leakage, e.g. by total immersion in water for 3 min at
ambient temperature, at a test pressure equal to the PR, except for acetylene where the test pressure
shall be no less than 300 bar.
Hose or hose assemblies to be used with hydrogen or helium shall be tested with helium. Hose or hose
assemblies to be used with other gases shall be tested with a compatible medium such as dry oil-free
air or nitrogen.
3
The leak rate shall be less than 15 cm /h.
4.2 Type tests
4.2.1 General
All test samples shall be manufactured to the same design, material specification and from the same
batch of raw material. Records of the tests performed are to be retained by the flexible hose assembly
manufacturer.
To carry out the tests described in this document, it is recommended that the nominal length of hose
between end fittings be 1 000 mm unless otherwise specified.
Before being type tested, all sample flexible hose assemblies shall be subjected to production pressure
tests as specified in 4.1.
For hoses to be used in hydrogen or helium service, the leak test in 4.1.2 shall be carried out using helium.
2 © ISO 2019 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 16964:2020
ISO 16964:2019(E)
Tests shall be performed at ambient temperature.
4.2.2 Burst pressure test (3 samples per type)
The flexible hose assembly complete with safety cable and clamps (if applicable), is to be hydraulically
pressurized until burst occurs. The pressurization rate shall be adjusted at the beginning of the test to
be approximately constant and to reach the burst pressure in not less than 1 min.
For specific applications, hold steps may be required before final burst pressure is reached.
The burst pressure of the flexible hoses assemblies shall not be less than 3 × PR for a value of PR less
than 480 bar and [(2 × PR) + 480] bar for a value of PR greater than or equal to 480 bar.
NOTE For acetylene service, hose with a higher burst pressure can be necessary in order to pass the
decomposition test desc
...
SLOVENSKI STANDARD
oSIST prEN ISO 16964:2020
01-januar-2020
Plinske jeklenke - Gibljive cevi in sklopi - Specifikacija in preskušanje (ISO
16964:2019)
Gas cylinders - Flexible hoses assemblies - Specification and testing (ISO 16964:2019)
Gasflaschen - Flexible Schlauchleitungen - Spezifikation und Prüfung (ISO 16964:2019)
Bouteilles à gaz - Flexibles - Spécifications et essais (ISO 16964:2019)
Ta slovenski standard je istoveten z: prEN ISO 16964
ICS:
23.020.35 Plinske jeklenke Gas cylinders
83.140.40 Gumene cevi Hoses
oSIST prEN ISO 16964:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 16964:2020
---------------------- Page: 2 ----------------------
oSIST prEN ISO 16964:2020
INTERNATIONAL ISO
STANDARD 16964
Second edition
2019-01
Gas cylinders — Flexible hoses
assemblies — Specification and testing
Bouteilles à gaz — Flexibles — Spécifications et essais
Reference number
ISO 16964:2019(E)
©
ISO 2019
---------------------- Page: 3 ----------------------
oSIST prEN ISO 16964:2020
ISO 16964:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 16964:2020
ISO 16964:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Production pressure tests . 2
4.1.1 Strength test . 2
4.1.2 Leak test . 2
4.2 Type tests . 2
4.2.1 General. 2
4.2.2 Burst pressure test (3 samples per type) . 3
4.2.3 Pressure cycle test (3 samples per type) . 3
4.2.4 Oxygen compatibility test (3 samples per type). 4
4.2.5 Acetylene compatibility test (3 samples) . 4
4.2.6 Gas material compatibility . 4
4.2.7 Test of the safety cable (2 samples) . 4
4.2.8 Additional tests . 5
5 Marking . 6
Annex A (informative) Examples of kink test, side impact test and torsion test .7
Bibliography .14
© ISO 2019 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 16964:2020
ISO 16964:2019(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.
This second edition cancels and replaces the first edition (ISO 16964:2015), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Test 1 for the safety cable has been clarified;
— the leak test has been corrected;
— the pressure cycle test has been clarified;
— the test apparatus for the torsion test, as shown in Figures A.6 and A.7 has been clarified.
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 2019 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 16964:2020
ISO 16964:2019(E)
Introduction
Flexible hose assemblies are used to transfer industrial and medical gases into cylinders, bundles,
MEGCs and trailers (battery vehicles), and also to supply such gases to user equipment.
There is a range of existing International Standards to be used for specific applications or hose
construction:
— ISO 14113 which covers hoses made with internal rubber or plastics tubing and used to supply gases
to customers for welding applications;
— ISO 21969 which covers hoses with an internal corrugated metallic liner and used to supply medical
gases to customers;
— ISO 10380 which covers hoses with internal corrugated metallic liner for all applications including
non-industrial and medical gases.
ISO 14113 and ISO 21969 cover only specific customer applications and are intended to be used
accordingly, while ISO 10380 is general in its approach.
The intent of the document is to describe flexible hoses not defined in the specific applications
documents mentioned above.
© ISO 2019 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 16964:2020
---------------------- Page: 8 ----------------------
oSIST prEN ISO 16964:2020
INTERNATIONAL STANDARD ISO 16964:2019(E)
Gas cylinders — Flexible hoses assemblies — Specification
and testing
1 Scope
This document provides specification and testing requirements for high pressure flexible hose
assemblies intended to be connected to gas cylinders, bundles of cylinders or trailers (battery vehicles),
and MEGCs for use when filling and emptying gas at production sites and also for customer use. This
document applies to flexible hose assemblies with rated pressures up to 1 000 bar for use in the
temperature range of −40 °C to +65 °C.
This document is not applicable to:
— rubber and plastics flexible hose assemblies for welding, cutting and related processes up to 45 MPa
(450 bar) for customer use (see ISO 14113);
— high pressure flexible hose assemblies for use with medical gas systems for customer use (see
ISO 21969);
— low pressure hose assemblies for use with medical gases for customer use (see ISO 5359);
— rubber and thermoplastic low pressure hose assemblies for welding, cutting and related processes
for customer use (see ISO 3821 or ISO 12170);
— flexible hose assemblies for cryogenic applications (see ISO 21012);
— flexible hose assemblies for liquid petroleum gas (LPG).
NOTE Flexible hose assembly designs which pass the type test approval described in this document can
have a lower ratio of burst pressure to rated pressure than stated in other standards.
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 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
ISO 10286, Gas cylinders — Terminology
ISO 10380, Pipework — Corrugated metal hoses and hose assemblies
ISO 14113:2013, Gas welding equipment — Rubber and plastics hose and hose assemblies for use with
industrial gases up to 450 bar (45 MPa)
ISO 21969:2009, High-pressure flexible connections for use with medical gas systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10286 and the following 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
© ISO 2019 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 16964:2020
ISO 16964:2019(E)
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
rated pressure
PR
pressure of a hose assembly equal to 1,25 PW, PW being the working pressure of the cylinder as defined
in ISO 10286
Note 1 to entry: National and international design codes for pressure systems can specify a higher value of rated
pressure.
Note 2 to entry: When cylinders are used (e.g. during filling or product withdrawal), the gas temperature can be
higher than 15 °C. This is the reason why the rated pressure is higher than the cylinder working pressure.
3.2
burst pressure
highest pressure reached in a flexible hose assembly during a burst test
4 Requirements
4.1 Production pressure tests
4.1.1 Strength test
Each flexible hose assembly shall first be subjected to a strength test using oil-free water at a pressure
at least equal to 1,5 times the rated pressure, PR, for a minimum of 3 min. There shall be no visible
sign of leakage, permanent deformation or other sign of failure. Where hydraulic testing would result
in unacceptable contamination of the flexible hose assembly, the hydraulic test may be replaced by
a pneumatic test using a compatible medium such as dry oil-free air or nitrogen. Appropriate safety
measures shall be taken to protect personnel and equipment during testing.
4.1.2 Leak test
Each hose or hose assembly shall be tested for leakage, e.g. by total immersion in water for 3 min at
ambient temperature, at a test pressure equal to the PR, except for acetylene where the test pressure
shall be no less than 300 bar.
Hose or hose assemblies to be used with hydrogen or helium shall be tested with helium. Hose or hose
assemblies to be used with other gases shall be tested with a compatible medium such as dry oil-free
air or nitrogen.
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The leak rate shall be less than 15 cm /h.
4.2 Type tests
4.2.1 General
All test samples shall be manufactured to the same design, material specification and from the same
batch of raw material. Records of the tests performed are to be retained by the flexible hose assembly
manufacturer.
To carry out the tests described in this document, it is recommended that the nominal length of hose
between end fittings be 1 000 mm unless otherwise specified.
Before being type tested, all sample flexible hose assemblies shall be subjected to production pressure
tests as specified in 4.1.
For hoses to be used in hydrogen or helium service, the leak test in 4.1.2 shall be carried out using helium.
2 © ISO 2019 – All rights reserved
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oSIST prEN ISO 16964:2020
ISO 16964:2019(E)
Tests shall be performed at ambient temperature.
4.2.2 Burst pressure test (3 samples per type)
The flexible hose assembly complete with safety cable and clamps (if applicable), is to be hydraulically
pressurized until burst occurs. The pressurization rate shall be adjusted at the beginning of the test to
be approximately constant and to reach the burst pressure in not less than 1 min.
For specific applications, hold steps may be required before final burst pressure is reached.
The burst pressure of the flexible hoses assemblies shall not be less than 3 × PR for a value of PR less
than 480 bar and [(2 × PR) + 480] bar for a value of PR greater than or equal to 480 bar.
NOTE For acetylene service, hose with a higher burst pressure can be necessary in order to pass the
decomposition test described in 4.2.5 for acetylene flexible hose assemblies. The minimum burst pressure for
this type of hose is generally given by the hose manufacturer.
4.2.3 Pressure cycle test (3 samples per type)
4.2.3.1 General
The flexible hose assembly complete with safety cable and clamps (if applicable) shall be submitted to a
hydraulic pressurization endurance test from a nominal atmospheric pressure (5 bar maximum) to PR
at a frequency of no more than 30 cycles per minute.
A pressure cycle consists of a pressure increase starting from a pressure not more than 5 bar to PR and
a pressure decrease from PR back to the start condition.
This endurance test shall not apply to acetylene flexible hose assemblies because the construction
of these hoses is designed to resist extremely high pressure and stress compared to acetylene’s low
working pressure PW.
4.2.3.2 General requirement
It shall be checked that the entire flexible hose assembly is exposed to a pressure cycle where:
— the maximum pressure is PR; and
— the minimum of each pressure cycle is no more than 5 bar.
The flexible hose assemblies shall not burst or show any visible leak during the test:
— Category A: 5 000 pressure cycles for flexible hose assemblies dedicated to non-filling applications
such as customer installations. This applies to flexible hose assemblies with metallic and non-
metallic liners.
— Category B: 50 000 pressure cycles for flexible hose assemblies with non-metallic liners dedicated
to filling centres.
Due to expansion of the hose during the test, the hydraulic pressure can fall. However, the hydraulic
pressure shall never fall below PR.
Care should be taken to avoid hose bending during testing as this can reduce the cycle life. The position
of the hose during the cycle test should be recorded (e.g. pictures).
4.2.3.3 Specific requirements for metallic hoses used in filling centres
The pressure cycle test shall be p
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