FprEN ISO 21011
(Main)Cryogenic vessels - Valves for cryogenic service (ISO/FDIS 21011:2023)
Cryogenic vessels - Valves for cryogenic service (ISO/FDIS 21011:2023)
This document specifies the requirements for the design, manufacture and testing of valves for a rated
temperature of -40 °C and below (cryogenic service), i.e. for operation with cryogenic fluids in addition
to operation at temperatures from ambient to cryogenic.
It applies to all types of cryogenic valves, including vacuum jacketed cryogenic valves up to size DN
200. This document can be used as guidance for larger size valves. This document is not applicable to
pressure relief valves covered by ISO 21013-1.
Kryo-Behälter - Ventile für den Kryo-Betrieb (ISO/FDIS 21011:2023)
Dieses Dokument legt die Anforderungen an die Konstruktion, Herstellung und Prüfung von Absperr-armaturen bei einer Bemessungstemperatur von −40 °C und darunter (Kryo-Betrieb) fest, d. h. für den Betrieb mit tiefkalten Fluiden zusätzlich zum Betrieb bei Umgebungstemperaturen bis zu tiefkühlen Temperaturen.
Dieses Dokument gilt für alle Arten von tiefkalten Absperrarmaturen, einschließlich vakuum-isolierten tiefkalten Absperrarmaturen mit Nennweiten bis DN 200.
Dieses Dokument kann als Anleitung für Absperrarmaturen mit größeren Nennweiten angewendet werden.
Dieses Dokument gilt nicht für in ISO 21013 1 enthaltene Druck-Ablass-Einrichtungen.
Récipients cryogéniques - Robinets pour usage cryogénique (ISO/FDIS 21011:2023)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 21011:2021
01-maj-2021
Kriogene posode - Ventili za kriogeno območje (ISO/DIS 21011:2021)
Cryogenic vessels - Valves for cryogenic service (ISO/DIS 21011:2021)
Kryo-Behälter - Ventile für den Kryo-Betrieb (ISO/DIS 21011:2021)
Récipients cryogéniques - Robinets pour usage cryogénique (ISO/DIS 21011:2021)
Ta slovenski standard je istoveten z: prEN ISO 21011
ICS:
23.020.40 Proti mrazu odporne posode Cryogenic vessels
(kriogenske posode)
23.060.01 Ventili na splošno Valves in general
oSIST prEN ISO 21011:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN ISO 21011:2021
oSIST prEN ISO 21011:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21011
ISO/TC 220 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2021-03-22 2021-06-14
Cryogenic vessels — Valves for cryogenic service
ICS: 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
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 21011:2021(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 21011:2021
ISO/DIS 21011:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2021 – All rights reserved
oSIST prEN ISO 21011:2021
ISO/DIS 21011:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 4
4.1 Materials . 4
4.1.1 General. 4
4.1.2 Metallic materials . 4
4.1.3 Non-metallic materials . 4
4.1.4 Corrosion resistance . 4
4.1.5 Gas material compatibility . 5
4.2 Design . 5
4.2.1 General. 5
4.2.2 Packing gland . 6
4.2.3 Operating positions . 6
4.2.4 Cavities . 6
4.2.5 Valve bonnet . 6
4.2.6 Securing of gland extension . 6
4.2.7 Seat . 6
4.2.8 Stem securement . 6
4.2.9 Torque . 7
4.2.10 Electric continuity and explosion proofness . 7
4.2.11 Fire resistance . 7
5 Testing . 7
5.1 Type approval . 7
5.1.1 Verification of the design . 7
5.1.2 Model number . 7
5.1.3 Type approval tests. 7
5.2 Production tests . 9
5.3 Test report . 9
6 Cleanliness . 9
7 Marking . 9
7.1 Marking on the body of the valve . 9
7.2 Marking on an identification plate .10
Annex A (informative) Recommended methods for leak tightness testing of cryogenic valves .11
Annex B (informative) Thermal shock test for valves used in LNG service .13
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU (Pressure Equipment Directive) aimed to
be covered . .14
Bibliography .15
oSIST prEN ISO 21011:2021
ISO/DIS 21011:2021(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
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,
This second edition cancels and replaces the first edition (ISO 21011:2008), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Update of the scope;
— Clarification of the use of pressure units;
— Revision of the type approval tests;
— Revision of Clause 7 Marking.
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 21011:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 21011:2021(E)
Cryogenic vessels — Valves for cryogenic service
1 Scope
This document specifies the requirements for the design, manufacture and testing of valves for a rated
temperature of −40 °C and below (cryogenic service), i.e. for operation with cryogenic fluids in addition
to operation at temperatures from ambient to cryogenic.
It applies to all types of cryogenic valves, including vacuum jacketed cryogenic valves up to size DN
200. This document can be used as guidance for larger size valves. This document is not applicable to
pressure relief valves covered by ISO 21013-1.
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 5208:2015, Industrial valves — Pressure testing of metallic valves
ISO 10434:2020, Bolted bonnet steel gate valves for the petroleum, petrochemical and allied industries
ISO 10497:2010, Testing of valves — Fire type-testing requirements
ISO 15761:2020, Steel gate, globe and check valves for sizes DN 100 and smaller, for the petroleum and
natural gas industries
ISO 17292:2015, Metal ball valves for petroleum, petrochemical and allied industries
ISO 21010:2017, Cryogenic vessels — Gas/material compatibility
ISO 21028-1:2016, Cryogenic vessels — Toughness requirements for materials at cryogenic temperature —
Part 1: Temperatures below -80 degrees C
ISO 21028-2:2018, Cryogenic vessels — Toughness requirements for materials at cryogenic temperature —
Part 2: Temperatures between -80 degrees C and -20 degrees C
ISO 23208:2017, Cryogenic vessels — Cleanliness for cryogenic service
3 Terms and definitions
For the purposes of this document, the following terms an
...
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