EN ISO 21922:2021
(Main)Refrigerating systems and heat pumps - Valves - Requirements, testing and marking (ISO 21922:2021)
Refrigerating systems and heat pumps - Valves - Requirements, testing and marking (ISO 21922:2021)
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 (ISO 21922:2021)
Dieses Dokument legt die Sicherheitsanforderungen, bestimmte funktionale Anforderungen und die Kennzeichnung von Ventilen und anderen Teilen, 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 Verfahren, nach denen reduzierte Werte für die Kerbschlagarbeit bei niedriger Temperatur auf sichere Art und Weise berücksichtigt werden dürfen.
Dieses Dokument ist anwendbar für die Konstruktion von Gehäusen und Oberteilen für Druckentlastungseinrichtungen, einschließlich Berstscheibeneinrichtungen, im Hinblick auf die Druckfestigkeit, es ist jedoch nicht anwendbar für andere Aspekte der Konstruktion oder die Anwendung von Druckentlastungseinrichtungen.
Ferner ist dieses Dokument anwendbar 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 (ISO 21922:2021)
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 (ISO 21922:2021)
Ta evropski standard določa varnostne zahteve, varnostne faktorje, preskusne metode, uporabljene preskusne tlake in označevanje ventilov za hladilne naprave in drugih komponent s podobnim ohišjem (v nadaljevanju: ventili) za uporabo v hladilnih sistemih.
Opisuje postopek, ki ga je treba upoštevati pri konstruiranju delov ventila (z izračunom ali eksperimentalno metodo konstruiranja), izpostavljenih obremenitvam, in merila, ki se uporabljajo pri izbiri materialov.
Standard opisuje metode, s katerimi se lahko na varen način upošteva zmanjšane udarne vrednosti pri nizkih temperaturah.
Ta standard se uporablja pri konstruiranju ohišij in pokrovov za tlačne varnostne naprave, vključno z napravami z razpočnimi membranami, v zvezi s tlačnim skladiščenjem; vendar se ne uporablja za druge vidike konstruiranja ali uporabe tlačnih varnostnih naprav.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2022
Nadomešča:
SIST EN 12284:2004
Hladilni sistemi in toplotne črpalke - Ventili - Zahteve, preskušanje in označevanje
(ISO 21922:2021)
Refrigerating systems and heat pumps - Valves - Requirements, testing and marking
(ISO 21922:2021)
Kälteanlagen und Wärmepumpen - Ventile - Anforderungen, Prüfung und
Kennzeichnung (ISO 21922:2021)
Systèmes de réfrigération et pompes à chaleur - Robinetterie - Exigences, essais et
marquage (ISO 21922:2021)
Ta slovenski standard je istoveten z: EN ISO 21922:2021
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
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2021
EUROPÄISCHE NORM
ICS 27.080; 27.200 Supersedes EN 12284:2003
English Version
Refrigerating systems and heat pumps - Valves -
Requirements, testing and marking (ISO 21922:2021)
Systèmes de réfrigération et pompes à chaleur - Kälteanlagen und Wärmepumpen - Ventile -
Robinetterie - Exigences, essais et marquage (ISO Anforderungen, Prüfung und Kennzeichnung (ISO
21922:2021) 21922:2021)
This European Standard was approved by CEN on 23 May 2021.
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, 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, 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21922:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
safety requirements of Directive 2014/68/EU . 4
European foreword
This document (EN ISO 21922:2021) 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 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 May 2022, and conflicting national standards shall be
withdrawn at the latest by May 2022.
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 12284:2003.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For the relationship with EU Directive(s) / Regulation(s), 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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 21922:2021 has been approved by CEN as EN ISO 21922:2021 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential safety
requirements of Directive 2014/68/EU
This European Standard has been prepared under a Commission’s standardization request “M/071" to
provide one voluntary means of conforming to essential safety requirements of Directive2014/68/EU
on the harmonisation of the laws of the Member States relating to the making available on the market of
pressure equipment.
Once this standard is cited in the Official Journal of the European Union under that Directive
2014/68/EU, 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 safety requirements of that Directive, and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Directive 2014/68/EU
Essential Safety Requirements of Clause(s)/subclause(s) of Remarks/Notes
Directive 2014/68/EU this EN
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
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 21922
First edition
2021-08
Refrigerating systems and heat
pumps — Valves — Requirements,
testing and marking
Systèmes de réfrigération et pompes à chaleur — Robinetterie —
Exigences, essais et marquage
Reference number
ISO 21922:2021(E)
©
ISO 2021
ISO 21922:2021(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
ISO 21922:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 List of symbols . 4
5 General requirements . 6
5.1 Installation and operation . 6
5.2 Components under pressure . 6
5.3 Excessive mechanical stress . 7
5.4 Tightness . 7
5.5 Functioning of hand-operated valves . 7
5.6 Functioning of actuator-operated valves. 7
6 Materials . 7
6.1 General . 7
6.1.1 Using metallic materials . 7
6.1.2 Using non-metallic materials . 7
6.2 Requirements for materials to be used for pressure bearing parts . 8
6.3 Compatibility of connections . 8
6.4 Ductility . 8
6.5 Ageing . 8
6.6 Castings . 8
6.7 Forged and welded components . . 8
6.8 Nuts, bolts and screws . 8
6.9 Spindles . 9
6.10 Glass materials . 9
6.11 Requirements for documentation . 9
6.12 Impact energy KV measurement on sub-sized specimens .10
7 Design .10
7.1 General .10
7.2 Maximum allowable pressure .
...
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