prEN ISO 24664
(Main)Refrigerating systems and heat pumps - Pressure relief devices and their associated piping - Methods for calculation (ISO/DIS 24664:2021)
Refrigerating systems and heat pumps - Pressure relief devices and their associated piping - Methods for calculation (ISO/DIS 24664:2021)
1.1 This Standard describes the calculation of mass flow for sizing pressure relief devices for components of refrigerating systems.
NOTE The term "refrigerating system" used in this Standard includes heat pumps.
1.2 This Standard describes the calculation of discharge capacities for pressure relief valves and other pressure relief devices in refrigerating systems including the necessary data for sizing these when relieving to atmosphere or to components within the system at lower pressure.
1.3 This Standard specifies the requirements for selection of pressure relief devices to prevent excessive pressure due to internal and external heat sources, the sources of increasing pressure (e.g. compressor, heaters, etc.) and thermal expansion of trapped liquid.
1.4 This Standard describes the calculation of the pressure loss in the upstream and downstream line of pressure relief valves and other pressure relief devices and includes the necessary data.
1.5 This Standard refers to other relevant standards in Clause 5.
Kälteanlagen und Wärmepumpen - Druckentlastungseinrichtungen und zugehörige Leitungen - Berechnungsverfahren (ISO/DIS 24664:2021)
1.1 Diese Internationale Norm beschreibt die Berechnung der Massenströme zur Größenbestimmung von Druckentlastungseinrichtungen für Teile von Kälteanlagen.
ANMERKUNG Der in dieser Europäischen Norm verwendete Begriff "Kälteanlage" schließt Wärmepumpen mit ein.
1.2 Diese Internationale Norm beschreibt die Berechnung der Abblaseleistungen von Druckentlastungsventilen und anderen Druckentlastungseinrichtungen in Kälteanlagen einschließlich der hierzu erforderlichen Daten zur Größenbestimmung dieser Einrichtungen, wenn sie ins Freie oder in einen Teil der Kälteanlage mit niedrigerem Druck abblasen.
1.3 Diese Internationale Norm legt die Anforderungen an die Auswahl von Druckentlastungseinrichtungen zur Vermeidung von unzulässigen Drücken, hervorgerufen durch innere und äußere Wärmequellen, Druckerzeuger (z. B. Verdichter, Erhitzer usw.) und die Wärmeausdehnung eingesperrter Flüssigkeit fest.
1.4 Diese Internationale Norm beschreibt die Berechnung des Druckabfalls in den zu und abführenden Leitungen von Druckentlastungsventilen und anderen Druckentlastungseinrichtungen einschließlich der erforderlichen Daten.
Systèmes frigorifiques et pompes à chaleur - Dispositifs de limitation de pression et tuyauteries associées - Méthodes de calcul (ISO/DIS 24664:2021)
Hladilni sistemi in toplotne črpalke - Tlačne varnostne naprave in njihove napeljave - Metode za izračun (ISO/DIS 24664:2021)
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Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 24664:2021
01-junij-2021
Hladilni sistemi in toplotne črpalke - Tlačne varnostne naprave in njihove
napeljave - Metode za izračun (ISO/DIS 24664:2021)
Refrigerating systems and heat pumps - Pressure relief devices and their associated
piping - Methods for calculation (ISO/DIS 24664:2021)
Kälteanlagen und Wärmepumpen - Druckentlastungseinrichtungen und zugehörige
Leitungen - Berechnungsverfahren (ISO/DIS 24664:2021)
Systèmes frigorifiques et pompes à chaleur - Dispositifs de limitation de pression et
tuyauteries associées - Méthodes de calcul (ISO/DIS 24664:2021)
Ta slovenski standard je istoveten z: prEN ISO 24664
ICS:
27.080 Toplotne črpalke Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
oSIST prEN ISO 24664:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 24664:2021
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oSIST prEN ISO 24664:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 24664
ISO/TC 86/SC 1 Secretariat: ANSI
Voting begins on: Voting terminates on:
2021-03-25 2021-06-17
Refrigerating systems and heat pumps — Pressure
relief devices and their associated piping — Methods for
calculation
Systèmes de réfrigeration et pompes à chaleur — Dispositifs de surpression et tuyauteries associèes —
Méthodes de calcul
ICS: 27.200; 27.080
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 24664:2021(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
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oSIST prEN ISO 24664:2021
ISO/DIS 24664:2021 (E)
ISO/DIS 24664:2021(E)
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This document was prepared by the European Committee for Standardization (CEN) Technical
Committee CEN/TC 182, Refrigerating systems, safety and environmental requirements, in collaboration
with ISO Technical Committee ISO/TC 86, Refrigeration and air-conditioning, Subcommittee SC 1, Safety
and environmental requirements for refrigerating systems, 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.
This first edition cancels and replaces EN 13136:2013+A1:2018, which has been technically r
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