SIST EN ISO 21012:2024

SLOVENSKI STANDARD
oSIST prEN ISO 21012:2021
01-november-2021
Kriogene posode - Gibke cevi (ISO/DIS 21012:2021)
Cryogenic vessels - Hoses (ISO/DIS 21012:2021)
Kryo-Behälter - Schlauchleitungen (ISO/DIS 21012:2021)
Récipients cryogéniques - Tuyaux flexibles (ISO/DIS 21012:2021)
Ta slovenski standard je istoveten z: prEN ISO 21012
ICS:
23.020.40 Proti mrazu odporne posode Cryogenic vessels
(kriogenske posode)
83.140.40 Gumene cevi Hoses
oSIST prEN ISO 21012:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 21012:2021
oSIST prEN ISO 21012:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21012
ISO/TC 220 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2021-09-17 2021-12-10
Cryogenic vessels — Hoses
Récipients cryogéniques — Tuyaux flexibles
ICS: 83.140.40; 23.020.40
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
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WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 21012:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021

oSIST prEN ISO 21012:2021
ISO/DIS 21012:2021(E)
© ISO 2021
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ii © ISO 2021 – All rights reserved

oSIST prEN ISO 21012:2021
ISO/DIS 21012:2021(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 . 8
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 . 9
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
Annex E (informative) Acceptable materials .16
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU (Pressure Equipment Directive) aimed to
be covered . .21
oSIST prEN ISO 21012:2021
ISO/DIS 21012:2021(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
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on the ISO list of patent declarations received (see www .iso .org/ patents).
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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, 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 21012:2021), which has been technically
revised.
This edition includes the following significant changes with respect to the previous edition:
— Modification of the scope
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 2021 – All rights reserved

oSIST prEN ISO 21012:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 21012:2021(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 a rated pressure. Hoses may be t
...