NF EN ISO 21922

NF EN ISO 21922

November 2021
Standard Current

Refrigerating systems and heat pumps - Valves - Requirements, testing and marking

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.

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Main informations

Collections

National standards and national normative documents

Publication date

November 2021

Number of pages

110 p.

Reference

NF EN ISO 21922

ICS Codes

23.060.20   Ball and plug valves
27.080   Heat pumps
27.200   Refrigerating technology

Classification index

E35-408

Print number

1

International kinship

ISO 21922:2021

European kinship

EN ISO 21922:2021
Sumary
Refrigerating systems and heat pumps - Valves - Requirements, testing and marking

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.

Replaced standards (1)
NF EN 12284
April 2004
Standard Cancelled
Refrigerating systems and heat pumps - Valves - Requirements, testing and marking

Dans la série des normes relatives aux systèmes de réfrigération et pompes à chaleur, le présent document spécifie les exigences de sécurité, les coefficients de sécurité, les méthodes d'essai, les pressions d'essai utilisées, ainsi que le marquage des robinets frigorifiques et des autres composants possédant un corps similaire, destinés à être utilisées dans les systèmes de réfrigération. Le présent document vient à l'appui des exigences essentielles de la Directive 97/23/CE concernant les équipements sous pression.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Liste des symboles
  • 5 Exigences générales
  • 6 Matériaux
  • 7 Conception
  • 8 Procédures de fabrication appropriées
  • 9 Essais de production
  • 10 Marquage et informations complémentaires
  • 11 Documentation
  • Annexe A (normative) Procédure de conception d'un robinet par calcul
  • Annexe B (normative) Méthode de conception expérimentale des robinets
  • Annexe C (normative) Détermination de la pression admissible à la température maximale de fonctionnement
  • Annexe D (normative) Détermination de la pression admissible à la température minimale de fonctionnement (exigences permettant de prévenir toute rupture fragile)
  • Annexe H (normative) Détermination des catégories pour les robinets
  • Annexe J (normative) Exigences supplémentaires - Indicateurs et voyants
  • Annexe K (normative) Procédure d'essai de compatibilité
  • Annexe M (normative) Méthode de dimensionnement de l'organe de manoeuvre des robinets
  • Annexe E (informative) Compilation des caractéristiques des matériaux fréquemment utilisés
  • Annexe F (informative) Justification des méthodes individuelles
  • Annexe G (normative) Vérification de la résistance à la pression des assemblages de robinet
  • Annexe I (informative) SystèmeDN
  • Annexe L (informative) Fissuration par corrosion sous contrainte
  • Annexe ZA (informative) Relation entre la présente Norme européenne et les exigences essentielles concernées de la Directive 2014/68/UE
  • Bibliographie
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