EN ISO 21012:2018

Cryogenic vessels - Hoses (ISO 21012:2018)

ISO 21012:2018 specifies design, construction, type and production testing, and marking requirements for non-insulated cryogenic flexible hoses used for the transfer of cryogenic fluids within the following range of operating conditions:
-      working temperature: 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.
ISO 21012:2018 is intended that the hose be designed and tested to satisfy the generally accepted rated pressure i.e. at least PR 40. Hoses may be then selected with a PR equal to or greater than the maximum allowable pressure (PS) of the equipment to which it is to be used.

Kryo-Behälter - Schlauchleitungen (ISO 21012:2018)

Dieses Dokument legt die Auslegung, den Bau, die Baumuster  und Produktionsprüfung sowie Anforderungen hinsichtlich der Kennzeichnung von nichtisolierten tiefkalten flexiblen Schläuchen fest, die bei der Übertragung tiefkalter Fluide im folgenden Bereich von Betriebs¬bedingungen 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.
Es ist vorgesehen, dass der Schlauch so ausgelegt und geprüft wird, dass sie dem allgemein anerkannten Nenndruck entspricht, d. h. mindestens PN 40. Die Schläuche dürfen dann für einen Nenndruck PN ausgewählt werden, der gleich oder größer ist als der höchstzulässige Druck (PS) der Einrichtung, in der sie angewendet werden.

Récipients cryogéniques - Tuyaux flexibles (ISO 21012:2018)

L'ISO 21012:2018 définit la conception, le type et les tests de production ainsi que les exigences de marquage applicables aux tuyaux flexibles cryogéniques non isolés utilisés pour le passage des fluides cryogéniques dans la plage de conditions de fonctionnement suivante:
-      température de service: entre − 270 °C et + 65 °C;
-      diamètre nominal (DN): entre 10 et 100.
Les pièces d'extrémité de montage d'un accouplement quelconque relèvent du domaine d'application de l'ISO 21012:2018; néanmoins, les accouplements sont couverts par d'autres normes.
Le tuyau doit être conçu et soumis à essai de façon à respecter la pression nominale communément acceptée, c'est-à-dire PN 40 au minimum. Les tuyaux peuvent être ensuite sélectionnés avec une pression nominale (PN) supérieure ou égale à la pression maximale admissible (PS) de l'équipement à laquelle il doit être utilisé.

Kriogene posode - Gibke cevi (ISO 21012:2018)

Ta standard podaja zahteve za projektiranje, konstrukcijo, tipsko in proizvodno preskušanje ter zahteve za označevanje za neizolirane kriogene gibke cevi, ki se uporabljajo za prenos kriogenih tekočin v naslednjem razponu delovnih pogojev: – delovna temperatura: od - 270 °C do + 65 °C ; – največji nazivni tlak: 80 barov; – nazivna velikost (DN): od 10 do 100. Končni priključki za montažo kakršnih koli spojk sodijo v področje uporabe tega standarda, vendar pa za spojke veljajo drugi standardi. Cev naj bi bila oblikovana in preizkušena, tako da ustreza splošno sprejetemu nazivnemu tlaku npr. PN 40. Nato se lahko izbere cevi, ki imajo PN enak ali večji od največjega dovoljenega tlaka (PS) opreme, s katero se uporabljajo.

General Information

• Status: Withdrawn
• Publication Date: 11-Dec-2018
• Withdrawal Date: 13-Apr-2025
• ICS: 23.020.40 - Cryogenic vessels
• ICS: 83.140.40 - Hoses
• Technical Committee: CEN/TC 268 - Cryogenic vessels
• Drafting Committee: CEN/TC 268/WG 2 - Compatibility, insulation, accessories
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 25-Sep-2024
• Completion Date: 14-Apr-2025
• Directive: 2008/68/EC - Directve 2008/68/EC of the European Parliament and of the council of 24 September 2008 on the inland transport of the dangerous goods
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Mandate: M/086 - Mandate to CEN for standardization in the field of transport of dangerous goods
• Ref Project: SIST EN ISO 21012:2019 - Cryogenic vessels - Hoses (ISO 21012:2018)

Relations

• Replaces: EN 12434:2000/AC:2001 - Cryogenic vessels - Cryogenic flexible hoses
• Effective Date: 19-Dec-2018
• Replaces: EN 12434:2000 - Cryogenic vessels - Cryogenic flexible hoses
• Effective Date: 19-Dec-2018
• Replaced By: EN ISO 21012:2024 - Cryogenic vessels - Hoses (ISO 21012:2024)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2019
1DGRPHãþD
SIST EN 12434:2001
SIST EN 12434:2001/AC:2002
Kriogene posode - Gibke cevi (ISO 21012:2018)
Cryogenic vessels - Hoses (ISO 21012:2018)
Kryo-Behälter - Schlauchleitungen (ISO 21012:2018)
Récipients cryogéniques - Tuyaux flexibles (ISO 21012:2018)
Ta slovenski standard je istoveten z: EN ISO 21012:2018
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
December 2018
EUROPÄISCHE NORM
ICS 23.020.40; 83.140.40 Supersedes EN 12434:2000
English Version
Cryogenic vessels - Hoses (ISO 21012:2018)
R?ipients cryog?iques - Tuyaux flexibles (ISO Kryo-Beh?ter - Schlauchleitungen (ISO 21012:2018)
21012:2018)
This European Standard was approved by CEN on 15 November 2018.

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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21012:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the Essential
requirements of EU Directive 2014/68/EU (Pressure equipment Directive) aimed to
be covered . 4
European foreword
This document (EN ISO 21012:2018) 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 June 2019, and conflicting national standards shall be
withdrawn at the latest by June 2019.
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 12434:2000.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For the relationship with EU Directive(s) see informative Annex ZA, which is an integral part of this
document.
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 21012:2018 has been approved by CEN as EN ISO 21012:2018 without any modification.

Annex ZA
(informative)
Relationship between this European Standard and the Essential
requirements of EU Directive 2014/68/EU (Pressure equipment Directive)
aimed to be covered
This European Standard has been prepared under a Commission’s standardization request M/071 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 Clause(s)/sub- Remarks/Notes
of Directive clause(s) of this
2014/68/EU EN
2.2.1 4.1 Design
4 4.2 Materials
1.1 4.3 Cleanliness
2.2.3 (b) 4.4 Mechanical properties
2.2.4 5 Hose sample test
3.2.2 6.2 Proof test
3.3 7 Marking
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 ISO
STANDARD 21012
Second edition
2018-03
Cryogenic vessels — Hoses
Récipients cryogéniques — Tuyaux flexibles
Reference number
ISO 21012:2018(E)
©
ISO 2018
ISO 21012:2018(E)
© ISO 2018
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.
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Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 21012:2018(E)
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 (optional, upon request of purchaser) . 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 . 7
6 Production testing . 8
6.1 General . 8
6.2 Pressure test . 8
6.3 Leak test . 8
7 Marking . 8
8 Cleaning . 8
9 Periodic examination . 8
10 Test certificate . 9
Annex A (informative) Typical hose assembly .10
Annex B (informative) 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 (informative) Rolling bend cycling test for hose assemblies constructed from
materials or composites not commonly used in cryogenic service .13
Annex D (informative) Guidelines for periodic examination of transfilling hoses .15
ISO 21012:2018(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 ISO/TC 220, Cryogenic vessels.
This second edition cancels and replaces the first edition (ISO 21012:2006), which has been technically
revised.
This edition includes the following significant changes with respect to the previous edition:
— Subclause 4.2: Added “any austenitic stainless steel hoses shall be annealed after formation for
hydrogen service.”;
— Subclause 4.4.3: Replaced shall with should;
— Subclause 4.4.3: Replaced 50 000 cycles with 10 000 cycles;
— Subclause 4.4.3: Added “This test is only required if the flexible hose is subject to multiple
wide/significant moves when under pressure.”;
— Subclause 5.3.2.1: Replaced 50 000 cycles with 10 000 cycles;
— Subclause 5.3.2.2: Replaced 50 000 cycles with 10 000 cycles;
— Annex B: Changed from Normative to Informative;
— Annex C: Changed from Normative to Informative;
— Annex C: Changed last sentence in second last paragraph to “Sufficient liquid nitrogen shall be used
to ensure the flexible hose assembly reaches liquid nitrogen temperature.”.
iv © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 21012:2018(E)
Cryogenic vessels — Hoses
1 Scope
This document specifies design, construction, type and production testing, and marking requirements
for non-insulated cryogenic flexible hoses used for the transfer of cryogenic fluids within the following
range of operating conditions:
— working temperature: 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.
It is intended that the hose be designed and tested to satisfy the generally accepted rated pressure i.e.
at least PR 40. Hoses may be then selected with a PR equal to or greater than the maximum allowable
pressure (PS) of the equipment to which it is to be used.
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/materials compatibility
ISO 21028-1, Cryogenic vessels — Toughness requirements for materials at cryogenic temperature —
Part 1: Temperatures below −80 °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 terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// 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 and permanently attached to the flexible
hose assembly end fittings, serving th
...