Slide background




ISO 21922:2021

ID 14441 | | Visite: 712 | Documenti ISOPermalink: https://www.certifico.com/id/14441

ISO 21922:2021

ID 14441 | 01.09.2021 / Preview in attachment

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

Introduction

This document is intended to describe the safety requirements, safety factors, test methods, test pressures used, and marking of valves and other components with similar bodies for use in refrigerating systems.

1  Scope

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.
...
add more in attachment

 

03.10.2022 - La norma EN ISO 21922:2021 è armonizzata direttiva PED

 

Con la pubblicazione in GU L 254/58 del 3.10.2022, della Decisione di esecuzione (UE) 2022/1844 della Commissione del 28 settembre 2022 la norma EN ISO 21922:2021 è entrata in regime di armonizzazione.

 

 
Descrizione Livello Dimensione Downloads
Allegato riservato ISO 21922 2021 Preview.pdf
ISO 2021
321 kB 2

Tags: Normazione Norme ISO Abbonati Normazione

Articoli correlati

Ultimi archiviati Normazione

CEI EN IEC 61851 1 2019
Mar 12, 2023 144

CEI EN IEC 61851-1:2019

CEI EN IEC 61851-1:2019 / IEC 2017 Sistema di ricarica conduttiva dei veicoli elettriciParte 1: Prescrizioni generali Classificazione CEI: 69-7Data pubblicazioneE: 2019-09 La presente Norma si applica alle apparecchiature di alimentazione per veicoli elettrici per la ricarica di veicoli elettrici… Leggi tutto
Mar 05, 2023 93

IEC 60884-1:2022

IEC 60884-1:2022 Plugs and socket-outlets for household and similar purposes - Part 1: General requirements DATA PUBBLICAZIONE 2022-08 IEC 60884-1:2022 applies to plugs and fixed or portable socket-outlets for AC only, with or without earthing contact, with a rated voltage greater than 50 V but not… Leggi tutto
Mar 05, 2023 185

CEI 23-57

CEI 23-57 Spine e prese per usi domestici e similariParte 2: Prescrizioni particolari per adattatori Classificazione CEI: 23-57 DATA PUBBLICAZIONE: 2020-08 La presente Norma specifica le prescrizioni particolari per gli adattatori, compresi quelli da viaggio, con tensione nominale superiore a 50 V… Leggi tutto

Più letti Normazione