ISO 21012
(Main)Cryogenic vessels — Hoses
Cryogenic vessels — Hoses
Récipients cryogéniques — Tuyaux flexibles
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FINAL DRAFT
International
Standard
ISO/FDIS 21012
ISO/TC 220
Cryogenic vessels — Hoses
Secretariat: AFNOR
Récipients cryogéniques — Tuyaux flexibles
Voting begins on:
2024-01-03
Voting terminates on:
2024-02-28
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Reference number
ISO/FDIS 21012:2024(en) © ISO 2024
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FINAL DRAFT
ISO/FDIS 21012:2024(en)
International
Standard
ISO/FDIS 21012
ISO/TC 220
Cryogenic vessels — Hoses
Secretariat: AFNOR
Récipients cryogéniques — Tuyaux flexibles
Voting begins on:
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
COPYRIGHT PROTECTED DOCUMENT
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© ISO 2024
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
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Published in Switzerland Reference number
ISO/FDIS 21012:2023(en) © ISO 2023
© ISO 2024 – All rights reserved
ii
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ISO/FDIS 21012:2023(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 .
...
ISO/FDIS 21012:20222024(E)
2022-06-21
2024-01
ISO TC 220
Secretariat: AFNOR
Cryogenic vessels — Hoses
Récipients cryogéniques — Tuyaux
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ISO/FDIS 21012:20222024(E)
© ISO 20222024, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or
utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be
requested from either ISO at the address below or ISO’s member body in the country of the
requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
copyright@iso.org
www.iso.org
2 © ISO 2022 – All rights reserved
ii © ISO 2024 – All rights reserved
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ISO/FDIS 21012:20222024(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 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.
© ISO 2022 – All rights reserved 3
© ISO 2024 – All rights reserved iii
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 21012:2024(E)
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.
It is intended that the hose be designed and tested to satisfy a rated pressure. 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 ed
...
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