EN ISO 21922:2021/A1:2024
(Amendment)Refrigerating systems and heat pumps - Valves - Requirements, testing and marking - Amendment 1 (ISO 21922:2021/Amd 1:2024)
Refrigerating systems and heat pumps - Valves - Requirements, testing and marking - Amendment 1 (ISO 21922:2021/Amd 1:2024)
This document specifies safety requirements, certain functional requirements, and marking of valves and other components with similar bodies, hereinafter called valves, for use in refrigerating systems including heat pumps.
This document includes requirements for valves with extension pipes.
This document describes the procedure to be followed when designing valve parts subjected to pressure as well as the criteria to be used in the selection of materials.
This document describes methods by which reduced impact values at low temperatures may be taken into account in a safe manner.
This document applies to the design of bodies and bonnets for pressure relief devices, including bursting disc devices, with respect to pressure containment but it does not apply to any other aspects of the design or application of pressure relief devices.
In addition, this document is applicable to valves with a maximum operating temperature not exceeding 200 °C and a maximum allowable pressure not exceeding 160 bar[1].
[1] 1 bar = 0,1 MPa.
Kälteanlagen und Wärmepumpen - Ventile - Anforderungen, Prüfung und Kennzeichnung - Änderung 1 (ISO 21922:2021/Amd 1:2024)
Dieses Dokument legt die Sicherheitsanforderungen, bestimmte funktionale Anforderungen und die Kennzeichnung von Ventilen und anderen Bauteilen, im Folgenden kurz Ventile genannt, für die Verwendung in Kälteanlagen einschließlich Wärmepumpen fest.
Dieses Dokument enthält Anforderungen für Ventile mit Verlängerungsrohren.
Dieses Dokument beschreibt das Verfahren, das bei der Konstruktion von druckbeanspruchten Ventilen zugrunde zu legen ist, sowie die bei der Auswahl von Werkstoffen für Ventilteile zu berücksichtigenden Kriterien.
Dieses Dokument beschreibt Methoden, nach denen reduzierte Werte für die Kerbschlagarbeit bei niedriger Temperatur auf sichere Art und Weise berücksichtigt werden können.
Dieses Dokument gilt für die Konstruktion von Gehäusen und Oberteilen für Druckentlastungseinrichtungen, einschließlich Berstscheibeneinrichtungen, im Hinblick auf die Druckfestigkeit, sie gilt jedoch nicht für andere Aspekte der Konstruktion oder die Anwendung von Druckentlastungseinrichtungen.
Ferner gilt dieses Dokument für Ventile mit einer maximalen Betriebstemperatur von nicht mehr als 200 °C und einem maximal zulässigen Druck von nicht mehr als 160 bar.
Systèmes de réfrigération et pompes à chaleur - Robinetterie - Exigences, essais et marquage - Amendement 1 (ISO 21922:2021/Amd 1:2024)
Le présent document spécifie les exigences de sécurité, certaines exigences fonctionnelles et le marquage des robinets et autres composants possèdant un corps similaire, ci-après appelés robinets, pour une utilisation dans les systèmes de réfrigération, y compris les pompes à chaleur.
Le présent document comprend des exigences pour les robinets avec des tuyaux d’extension.
Le présent document décrit la procédure à suivre lors de la conception des éléments de robinetterie soumis à une pression ainsi que les critères à utiliser dans le choix des matériaux.
Le présent document décrit des méthodes permettant de prendre en compte en toute sécurité les valeurs de résilience faibles à basse température.
Le présent document s'applique à la conception des corps et des chapeaux des dispositifs limiteurs de pression, y compris les dispositifs à disque de rupture, eu égard au confinement de la pression, mais elle ne s'applique à aucun autre aspect de la conception ou de l'application des dispositifs limiteurs de pression.
En outre, le présent document est applicable aux robinets dont la température maximale de fonctionnement ne dépasse pas 200 °C et dont la pression maximale admissible ne dépasse pas 160 bar[1].
[1] 1 bar = 0,1 MPa.
Hladilni sistemi in toplotne črpalke - Ventili - Zahteve, preskušanje in označevanje - Dopolnilo A1 (ISO 21922:2021/Amd 1:2024)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2025
Hladilni sistemi in toplotne črpalke - Ventili - Zahteve, preskušanje in označevanje
- Dopolnilo A1 (ISO 21922:2021/Amd 1:2024)
Refrigerating systems and heat pumps - Valves - Requirements, testing and marking -
Amendment 1 (ISO 21922:2021/Amd 1:2024)
Kälteanlagen und Wärmepumpen - Ventile - Anforderungen, Prüfung und
Kennzeichnung - Änderung 1 (ISO 21922:2021/Amd 1:2024)
Systèmes de réfrigération et pompes à chaleur - Robinetterie - Exigences, essais et
marquage - Amendement 1 (ISO 21922:2021/Amd 1:2024)
Ta slovenski standard je istoveten z: EN ISO 21922:2021/A1:2024
ICS:
23.060.20 Zapirni ventili (kroglasti in Ball and plug valves
pipe)
27.080 Toplotne črpalke Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 21922:2021/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2024
EUROPÄISCHE NORM
ICS 27.080; 27.200
English Version
Refrigerating systems and heat pumps - Valves -
Requirements, testing and marking - Amendment 1 (ISO
21922:2021/Amd 1:2024)
Systèmes de réfrigération et pompes à chaleur - Kälteanlagen und Wärmepumpen - Ventile -
Robinetterie - Exigences, essais et marquage - Anforderungen, Prüfung und Kennzeichnung -
Amendement 1 (ISO 21922:2021/Amd 1:2024) Änderung 1 (ISO 21922:2021/Amd 1:2024)
This amendment A1 modifies the European Standard EN ISO 21922:2021; it was approved by CEN on 11 November 2024.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant 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 amendment 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 NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
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 21922:2021/A1:2024 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 aimed to be covered . 4
European foreword
This document (EN ISO 21922:2021/A1:2024) has been prepared by Technical Committee ISO/TC 86
"Refrigeration and air-conditioning" in collaboration with Technical Committee CEN/TC 182
“Refrigerating systems, safety and environmental requirements” the secretariat of which is held by DIN.
This Amendment to the European Standard EN ISO 21922:2021 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by June 2025, and
conflicting national standards shall be withdrawn at the latest by June 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 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 21922:2021/Amd 1:2024 has been approved by CEN as EN ISO 21922:2021/A1:2024
without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU aimed to be covered
This European Standard has been prepared under a Commission’s standardization request M/601 to
provide one voluntary means of conforming to essential requirements of Directive 2014/68/EU.
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 and application of the
edition of the normatively referenced standards as given in Table ZA.2 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 Directive 2014/68/EU
Essential Safety Clause(s)/subclause(s) Remarks/Notes
Requirements of Directive of this EN
2014/68/EU
4.3 6.11 Material documentation
3.1.4 6.1.1, 6.4, 6.6, 6.7, D.3.3 Heat treatment
2.2.2 7.3 Design for adequate strength
7.1.2 Annex A.2 Allowable stresses
2.6 7.12 Corrosion
3.1.1 8 Preparation of the component parts
3.2.2, 7.4 9.1 Proof test
3.3 10.2 Marking and labelling
3.4 11 Operating instructions
7.2 Table A.2 Joint coefficients
2.2.3 Annex A, C and D Design for adequate strength by
calculation
2.2.4 Annex B, C and D Design for adequate strength by
experimental method
4.1 a) and 7.5 Annex D Requirements to avoid brittle fracture
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 148-1 ISO 148-1:2016 Metallic materials. EN ISO 148-1:2016
Charpy pendulum
impact test — Part 1:
Test method
ISO 5149-1 ISO 5149- Refrigerating systems None
1:2014+A2:2021 and heat pumps —
For applicable standard
Safety and
edition see column 2
environmental
requirements — Part
1: Definitions,
classification and
selection criteria
ISO/TR 15608 ISO/TR 15608:2017 Welding — Guidelines CEN ISO/TR 15608:2017
for a metallic material
grouping system
EN 12516-2 None Industrial valves — EN 12516-2:2014
Shell design strength
For applicable standard EN 12516-2:2014/A1:2021
— Part 2: Calculation
edition see column 4
method for steel valve
shells
EN 13445-3 None Unfired pressure EN 13445-3:2021
vessels — Part 3:
For applicable standard
Design
edition see column 4
EN 14276-2:2020 None Pressure equipment EN 14276-2:2020
for refrigerating
For applicable standard
systems and heat
edition see column 4
pumps — Part 2:
Piping — General
requirements
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 21922
First edition
Refrigerating systems and heat
2021-08
pumps — Valves — Requirements,
testing and marking
AMENDMENT 1
2024-11
AMENDMENT 1
Systèmes de réfrigération et pompes à chaleur — Robinetterie —
Exigences, essais et marquage
AMENDEMENT 1
Reference number
ISO 21922:2021/Amd.1:2024(en) © ISO 2024
ISO 21922:2021/Amd.1:2024(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
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 21922:2021/Amd.1:2024(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 document 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 86, Refrigeration and air-conditioning,
Subcommittee SC 1, Safety and environmental requirements for refrigerating systems, in collaboration with the
European Committee for Standardization (CEN) Technical Committee CEN/TC 182, Refrigerating systems,
safety and environmental requirements, in accordance with the Agreement on technical cooperation between
ISO and CEN (Vienna Agreement).
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.
iii
ISO 21922:2021/Amd.1:2024(en)
Refrigerating systems and heat pumps — Valves —
Requirements, testing and marking
AMENDMENT 1
Table 1
Replace the K , L and Q rows with the following rows:
VS M
K Flow coefficient of the valve m /h
VS
L Leakage percentage %
Q Valve leakage mass flow rate measured with air kg/h
m
Replace the Q row with the following two rows:
V
Q Valve leakage volume flow rate measured upstream with air m /h
V1
Q Valve leakage volume flow rate measured downstream with air m /h
V2
7.6
Replace the entire subclause 7.6 with the following:
7.6 Seat tightness
7.6.1 General
Subclause 7.6 applies to components where internal seat tightness is a design feature. The seat tightness
shall be classified according to Table 3.
The maximum leakage percentage, L, is calculated as described in 7.6.2. The maximum values of L for a given
seat tightness class are listed in Table 3.
...
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