EN ISO 21012:2024
(Main)Cryogenic vessels - Hoses (ISO 21012:2024)
Cryogenic vessels - Hoses (ISO 21012:2024)
This document specifies design, construction, type and production testing, and marking requirements for both non-insulated cryogenic flexible hoses and insulated vacuum jacketed hoses used for the transfer of cryogenic fluids within the following range of operating conditions:
— working temperature range: from −270 °C to +65 °C;
— nominal size (DN): from 10 to 100.
End fittings for mounting of any couplings are within the scope of this document, but the couplings are subject to other standards.
Kryo-Behälter - Schlauchleitungen (ISO 21012:2024)
Dieses Dokument legt die Auslegung, den Bau, die Baumuster und Produktionsprüfung sowie Anforderungen hinsichtlich der Kennzeichnung sowohl von nichtisolierten flexiblen Kryo-Schläuchen auch isolierten vakuumummantelten Schläuchen fest, die bei der Übertragung tiefkalter Fluide im folgenden Bereich von Betriebsbedingungen verwendet werden:
- Arbeitstemperaturbereich: von −270 °C bis +65 °C;
- Nennweite (DN): von 10 bis 100.
Anschlussverschraubungen für die Montage von Kupplungen fallen in den Anwendungsbereich dieses Dokuments, die Kupplungen selbst sind jedoch Gegenstand anderer Normen.
Récipients cryogéniques - Tuyaux flexibles (ISO 21012:2024)
Le présent document définit la conception, le type et les tests de production ainsi que les exigences de marquage applicables à la fois aux tuyaux flexibles cryogéniques non isolés et aux tuyaux à double enveloppe sous vide utilisés pour le passage des fluides cryogéniques dans la plage de conditions de fonctionnement suivante :
— plage de température de service : entre − 270 °C et + 65 °C ;
— diamètre nominal (DN) : entre 10 et 100.
Les pièces d’extrémité de montage d’un couplage quelconque relèvent du domaine d’application du présent document ; néanmoins, les couplages sont couverts par d’autres normes.
Kriogene posode - Gibke cevi (ISO 21012:2024)
Ta dokument določa zahteve za načrtovanje, izdelavo, tipsko in proizvodno preskušanje ter zahteve za označevanje neizoliranih kriogenih gibkih cevi in izoliranih vakuumsko oplaščenih cevi, ki se uporabljajo za prenos kriogenih tekočin v naslednjem območju delovanja:
– območje delovne temperature: od −270 °C do +65 °C;
– nazivna velikost (DN): od 10 do 100.
Končni priključki za montažo spojk spadajo na področje uporabe tega dokumenta, za spojke pa veljajo drugi standardi.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2024
Nadomešča:
SIST EN ISO 21012:2019
Kriogene posode - Gibke cevi (ISO 21012:2024)
Cryogenic vessels - Hoses (ISO 21012:2024)
Kryo-Behälter - Schlauchleitungen (ISO 21012:2024)
Récipients cryogéniques - Tuyaux flexibles (ISO 21012:2024)
Ta slovenski standard je istoveten z: EN ISO 21012:2024
ICS:
23.020.40 Proti mrazu odporne posode Cryogenic vessels
(kriogenske posode)
83.140.40 Gumene cevi Hoses
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 21012
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2024
EUROPÄISCHE NORM
ICS 23.020.40; 83.140.40 Supersedes EN ISO 21012:2018
English Version
Cryogenic vessels - Hoses (ISO 21012:2024)
Récipients cryogéniques - Tuyaux flexibles (ISO Kryo-Behälter - Schlauchleitungen (ISO 21012:2024)
21012:2024)
This European Standard was approved by CEN on 29 March 2024.
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, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
E U R OP ÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21012:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU (Pressure Equipment Directive) aimed to be
covered. 4
European foreword
This document (EN ISO 21012:2024) has been prepared by Technical Committee ISO/TC 220
"Cryogenic vessels" in collaboration with Technical Committee CEN/TC 268 “Cryogenic vessels and
specific hydrogen technologies applications” the secretariat of which is held by AFNOR.
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 March 2025, and conflicting national standards shall
be withdrawn at the latest by March 2025.
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 21012:2018.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 21012:2024 has been approved by CEN as EN ISO 21012:2024 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU (Pressure Equipment Directive)
aimed to be covered
This European Standard has been prepared under Commission Implementing Decision C(2024)1241 of
1.3.2024 on a standardisation request to the European Committee for Standardization and the
European Committee for Electrotechnical Standardization as regards pressure equipment and
assemblies in support of Directive 2014/68/EU of the European Parliament and of the Council (M/601)
to provide one voluntary means of conforming to essential requirements of 2014/68/EU (Pressure
equipment Directive).
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive, and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Annex I of Directive
2014/68/EU (Pressure Equipment Directive)
Essential Requirements of Clause(s)/sub-clause(s) Remarks/Notes
Directive 2014/68/EU of this EN
2.2.1 1, 4.1, 4.2, 4.4 Design
2.2.3 4.1, 4.4.1, 5.2.4
2.2.4 5 Clause 5 covers the sample tests
which is representative of the
equipment, except the last
sentence of subclause 5.2.5.
4.1 4.2, 4.4, Table E.1 Table E.1 is based on the
approved European Materials
nomenclature.
When it comes to bending tests,
the test shall be done under
specified operating conditions.
4.2 4.2, Table E.1
4.3 4.2 Clause 4.2 requirement 3) covers
the material conformity.
st
3.2.2 1 paragraph of 5.2.4 Proof test
3.3 7 Marking
Table ZA.2 — Applicable Standards to confer presumption of conformity as described in this
Annex ZA
Reference in International Title Corresponding European
Clause 2 Standard Edition Standard Edition
ISO 7369 ISO 7369:2020 Pipework — Metal hoses and hose EN ISO 7369:2020
assemblies — Vocabulary
ISO 10806 ISO 10806:2003 Pipework — Fittings for EN ISO 10806:2003
corrugated metal hoses
ISO 21010 ISO 21010:2017 Cryogenic vessels — Gas/material EN 1797:2001
compatibility
ISO 21028-1 ISO 21028-1:2016 Cryogenic vessels — Toughness EN ISO 21028-1:2016
requirements for materials at
cryogenic temperature — Part 1:
Temperatures below −80 °C
ISO 23208 ISO 23208:2017 Cryogenic vessels — Cleanliness EN ISO 23208:2019
for cryogenic service
The documents listed in the Column 1 of Table ZA.2, in whole or in part, are normatively referenced in
this document, i.e. are indispensable for its application. The achievement of the presumption of
conformity is subject to the application of the edition of Standards as listed in Column 4 or, if no
European Standard Edition exists, the International Standard Edition given in Column 2 of Table ZA.2.
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
International
Standard
ISO 21012
Third edition
Cryogenic vessels — Hoses
2024-08
Récipients cryogéniques — Tuyaux flexibles
Reference number
ISO 21012:2024(en) © ISO 2024
ISO 21012:2024(en)
© ISO 2024
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 21012:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 2
4.1 Design and construction .2
4.2 Materials .3
4.3 Cleanliness .3
4.4 Mechanical properties .4
4.4.1 Burst pressure .4
4.4.2 Pressure cycles .4
4.4.3 Bending test .4
4.4.4 Resistance to abuse . .4
4.4.5 Low temperature resistance .4
4.4.6 Leak tightness .4
4.4.7 Electrical properties .4
5 Hose sample tests . . 4
5.1 General .4
5.2 Non-destructive tests and inspection.6
5.2.1 Documentation of materials .6
5.2.2 Dimensional check .6
5.2.3 Cleanliness check .6
5.2.4 Pressure test .6
5.2.5 Leak test .6
5.2.6 Crushing test .6
5.3 Destructive tests .7
5.3.1 Hydraulic pressure cycling.7
5.3.2 Rolling bend cycling test .7
5.3.3 Hydraulic bursting test .7
5.3.4 Examination of sectional cut .8
6 Production testing . 8
6.1 General .8
6.2 Pressure test . .8
6.3 Leak test .8
7 Marking . . 8
8 Cleaning . 9
9 Periodic examination . 9
10 Test certificate . 9
Annex A (informative) Typical hose assembly . 10
Annex B (normative) Rolling bend cycling test for metallic hose assemblies and hose assemblies
made of materials with a record of satisfactory use in cryogenic service .11
Annex C (normative) Rolling bend cycling test for hose assemblies constructed from materials
or composites not commonly used in cryogenic service .12
Annex D (informative) Guidelines for periodic examination of transfilling hoses . 14
Annex E (informative) Acceptable materials.15
Bibliography .21
iii
ISO 21012:2024(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 220, Cryogenic vessels. in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 268, Cryogenic vessels, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 21012:2018), which has been technically
revised.
The main changes are as follows:
— Modification of the Scope;
— Modification of the normative references;
— Improvement of the link between requirements of materials (4.2) and addition of a new Annex E for
materials;
— Explanations provided for austenitic stainless steel in pressure test (subclause 5.2.4).
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
International Standard ISO 21012:2024(en)
Cryogenic vessels — Hoses
1 Scope
This document specifies design, construction, type and production testing, and marking requirements for
both non-insulated cryogenic flexible hoses and insulated vacuum jacketed hoses used for the transfer of
cryogenic fluids within the following range of operating conditions:
— working temperature range: from −270 °C to +65 °C;
— nominal size (DN): from 10 to 100.
End fittings for mounting of any couplings are within the scope of this document, but the couplings are
subject to 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 7369, Pipework — Metal hoses and hose assemblies — Vocabulary
ISO 10806, Pipework — Fittings for corrugated metal hoses
ISO 21010, Cryogenic vessels — Gas/material compatibility
ISO 21028-1, Cryogenic vessels — Toughness requirements for materials at cryogenic temperature — Part 1:
Temperatures below -80 degrees °C
ISO 23208, Cryogenic vessels — Cleanliness for cryogenic service
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 7369 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— IEC Electropedia: available at https:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.1
hose
flexible leak-tight inner tube of either corrugated metal, elastomer or plastic
3.2
braid
layer, or layers, of cylindrically woven wires covering the hose (3.1) and permanently attached to the flexible
hose assembly (3.5) end fitting (3.4) with a ferrule, serving the function of restraining the flexible hose
against elongation
ISO 21012:2024(en)
3.3
protection coil
protection cover
outer coil or cover fitted to protect the main hose (3.1) and braid (3.2) against damage and abrasion
3.4
end fitting
fitting (of material compatible with material and product transferred) attached to each end of the hose (3.1)
and braid (3.2) (when fitted)
3.5
hose assembly
hose (3.1) with end fittings (3.5) attached, complete with either braid (3.2) or other covering, or both, ready
for service
3.6
nominal size
DN
alphanumeric designation of size for components of a pipework system, which is used for reference purposes
Note 1 to entry: It comprises the letters DN followed by a dimensionless whole number that is indirectly related to the
physical size, in millimetres, of the bore or outside diameter of the end connections.
[SOURCE: ISO 6708:1995, 2.1, modified — The second part of the definition was moved into a Note 1 to entry.
The original Note 1 to entry was deleted.]
3.7
rated pressure
P
R
(3.1) lowest maximum allowable working pressure (MAWP) of any component of the hose at 20 °C
Note 1 to entry: See also 4.1.
3.8
rated minimum temperature
lowest temperature to which the hose assembly (3.5) is rated by the manufacturer and which is intended to
be used for the transfer
3.9
working temperature range
highest and lowest temperature to which the hose assembly (3.5) is to be subjected
3.10
cyclic life
minimum number of complete cycles which, at the test conditions, the hose assembly (3.5) is designed to
withstand without failure
4 General requirements
4.1 Design and construction
The test pressure used during tests (see Clause 5) shall be greater than or equal to 1,5 × the PR specified. In
addition, the PR shall not be less than the maximum allowable pressure (PS) of the equipment to which it is
to be used. A hose is typically made from corrugated metal, from strip steel. The corrugation may be parallel
or helical. The maximum pressure in service shall be lower than or equal to the (PR), which is stamped on
the hose assembly.
If elastomers or composites are used, additional requirements shall be applied in accordance with 5.3.2.2.
ISO 21012:2024(en)
A braid is commonly fitted over the hose. This generally consists of woven wire in one or two layers
in stainless steel, or a high strength copper alloy. It may have a cover that shall be compatible with the
surroundings and with the conveyed fluid.
The design shall ensure that pressurization, or corrosion, between the inner tube and the outer braid or
sheath is prevented.
End fittings shall be designed as a rigid seal to the ends of a hose to ensure:
— a tight fit to the hose;
— a strong joint between the braid, hose and end fitting to stabilize the hose against elongation at PR.
Fittings for corrugated metal hose assemblies may conform to ISO 10806 or other recognized standards.
An area for marking shall be provided on one of the end fittings or on an attachment.
All joining methods used in corrugated hose assemblies shall be qualified. Manual welds shall be in
accordance with applicable standards.
A typical cryogenic hose assembly is shown in Annex A.
4.2 Materials
All materials shall be compatible with the fluid conveyed and shall be controlled by the manufacturer of the
hose assembly by a specification ensuring control of chemical content and physical properties, and quality at
least equivalent to an internationally recognized standard. Materials for the manufacture of corrugated metal
hose assemblies shall be selected on the basis of their suitability for fabrication, e.g. cold forming and welding
and for the conditions under which they shall be used. In addition, the following requirements shall be met:
— end connections and couplings shall be made of materials compatible with the other materials of the
hose assembly;
— a material is compatible when it does not lead to any violent reaction (e.g. ignition) or any slow reaction
with the conveyed gases, and permeability shall be appropriate for intended use;
— a test certificate providing the chemical content and physical property test results shall be provided
with the hose assembly.
The materials used in a cryogenic hose assembly shall:
a) maintain sufficient ductility at the rated minimum temperature (as specified in ISO 21028-1);
b) be oxygen compatible, if specified for oxygen or nitrous oxide service (as specified in ISO 21010);
c) be solution annealed after formation for any austenitic stainless-steel hoses used in hydrogen service;
d) contain less than 65 % copper, in the alloy as well as the soldering materials, if it is specified for mixtures
containing acetylene.
A list of acceptable materials is given in Annex E (Table E.1 for European materials, Table E.2 for non-
European materials).
4.3 Cleanliness
Hose assemblies specified for all cryogenic fluids shall be cleaned in accordance with ISO 23208 to remove
hydrocarbons, moisture, particles or other contaminations from inside the hose assembly.
ISO 21012:2024(en)
4.4 Mechanical properties
4.4.1 Burst pressure
The burst pressure shall be at least three times the PR at ambient temperature. Failure shall occur only in
the body of the hose and braid and not in their connections. See 5.3.3 for burst test.
4.4.2 Pressure cycles
Hose assemblies shall have a minimum cyclic life of 10 000 cycles when repeatedly pressurized from <1 bar
to their PR in accordance with 5.3.1.
4.4.3 Bending test
Hose assemblies shall have a minimum cyclic life of 10 000 cycles when repeatedly flexed at their PR in
accordance with 5.3.2.
This test is only required if the flexible hose is subject to multiple wide/significant moves when under
pressure.
NOTE Actual life cycle of hose depends on actual operating conditions.
When it comes to bending tests, the test shall be done under specified operating conditions.
4.4.4 Resistance to abuse
Hose assemblies shall withstand a crushing test, simulating a person stepping on the hose assembly, in
accordance with 5.2.6.
Hose assemblies shall have sufficient resistance to visible deterioration of the braid
...
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