FprEN ISO 14903
(Main)Refrigerating systems and heat pumps - Qualification of tightness of components and joints (ISO/DIS 14903:2023)
Refrigerating systems and heat pumps - Qualification of tightness of components and joints (ISO/DIS 14903:2023)
ISO 14903:2017 provides the qualification procedure for type approval of the tightness of hermetically sealed and closed components, joints and parts used in refrigerating systems and heat pumps as described in relevant parts of ISO 5149. The sealed and closed components, joints and parts concerned are, in particular, fittings, bursting discs, flanged or fitted assemblies. The tightness of flexible piping made from non-metallic materials is dealt with in ISO 13971. Metal flexible piping are covered by this document.
The requirements contained in this document are applicable to joints of maximum DN 50 and components of internal volume of maximum 5 l and maximum weight of 50 kg.
ISO 14903:2017 is intended to characterize their tightness stresses met during their operations, following the fitting procedure specified by the manufacturer, and to specify the minimal list of necessary information to be provided by the supplier of a component to the person in charge of carrying out this procedure.
It specifies the level of tightness of the component, as a whole, and its assembly as specified by its manufacturer.
It applies to the hermetically sealed and closed components, joints and parts used in the refrigerating installations, including those with seals, whatever their material and their design are.
ISO 14903:2017 specifies additional requirements for mechanical joints that can be recognized as hermetically sealed joints.
Kälteanlagen und Wärmepumpen - Qualifizierung der Dichtheit der Bauteile und Verbindungen (ISO/FDIS 14903:2024)
Dieses Dokument legt ein Verfahren zur Verfügung zur Qualifizierung der Baumusterprüfung zur Dichtheit von hermetisch dichten und geschlossenen Bauteilen, Verbindungen und Teilen, die in Kälteanlagen und Wärmepumpen, wie in relevanten Teilen der Normenreihe ISO 5149 beschrieben, Anwendung finden, einschließlich der metallischen, flexiblen Rohrleitungen. Es legt den Grad der Dichtheit des Bauteils als Ganzes sowie dessen durch den Hersteller festgelegten Zusammenbau fest. Es legt zusätzliche Anforderungen an mechanische Verbindungen fest, die als hermetisch dichte Verbindungen anerkannt werden können.
Dieses Dokument ist anwendbar für Verbindungen mit höchstens DN 50 und für Bauteile mit einem Innenvolumen von höchstens 5 l und einer Höchstmasse von 50 kg.
Es ist auf die in kältetechnischen Einrichtungen angewendeten hermetisch dichten und geschlossenen Bauteile, Verbindungen und Teile (z. B. Fittings, Berstscheiben, geflanschte oder verbundene Baugruppen) anwendbar, einschließlich der mit Dichtungen versehenen, unabhängig von deren Werkstoff und Auslegung.
Dieses Dokument gilt nicht für die Dichtheit flexibler Rohrleitungen aus nicht-metallischem Material. Dies wird in ISO 13971 behandelt.
Bauteile, die vor dem Veröffentlichungsdatum dieses Dokuments geprüft wurden und ISO 14903:2017 entsprechen, werden als übereinstimmend mit diesem Dokument betrachtet.
Systèmes de réfrigération et pompes à chaleur - Qualification de l'étanchéité des composants et des joints (ISO/DIS 14903:2023)
ISO 14903:2017 fournit les procédures de qualification pour essai de type de l'étanchéité des composants, joints et éléments hermétiquement scellés et fermés, utilisés dans les systèmes de réfrigération et les pompes à chaleur comme décrits dans les parties pertinentes de l'ISO 5149. Les composants, joints et éléments scellés ou fermés sont notamment les raccords, les disques de rupture ou d'éclatement, les assemblages à brides ou à raccords. L'étanchéité des flexibles en matériaux non métalliques est traitée dans l'ISO 13971. Les flexibles métalliques sont couverts par le présent document.
Les exigences du présent document s'appliquent aux joints de DN 50 maximum et aux composants de 5 l maximum et d'un poids maximal de 50 kg.
ISO 14903:2017 est destiné à caractériser leur étanchéité, les contraintes rencontrées pendant leur fonctionnement, en suivant la procédure de montage spécifiée par le fabricant et à spécifier la liste minimale des informations nécessaires à fournir par le fournisseur d'un composant à la personne chargée de mettre en ?uvre cette procédure.
Il spécifie le niveau d'étanchéité du composant, dans son ensemble, ainsi que son assemblage comme spécifié par son fabricant.
Il est applicable aux composants, joints et éléments hermétiquement scellés et fermés utilisés dans les installations frigorifiques, y compris ceux avec joints d'étanchéité, indépendamment de leur matière et de leur conception.
ISO 14903:2017 spécifie des exigences supplémentaires concernant les joints mécaniques susceptibles d'être considérés comme des joints hermétiquement scellés.
Hladilni sistemi in toplotne črpalke - Ocena tesnosti sestavnih delov in spojev (ISO/DIS 14903:2023)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 14903:2023
01-november-2023
Hladilni sistemi in toplotne črpalke - Ocena tesnosti sestavnih delov in spojev
(ISO/DIS 14903:2023)
Refrigerating systems and heat pumps - Qualification of tightness of components and
joints (ISO/DIS 14903:2023)
Kälteanlagen und Wärmepumpen - Qualifizierung der Dichtheit der Bauteile und
Verbindungen (ISO/DIS 14903:2023)
Systèmes de réfrigération et pompes à chaleur - Qualification de l'étanchéité des
composants et des joints (ISO/DIS 14903:2023)
Ta slovenski standard je istoveten z: prEN ISO 14903
ICS:
27.080 Toplotne črpalke Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
oSIST prEN ISO 14903:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN ISO 14903:2023
oSIST prEN ISO 14903:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 14903
ISO/TC 86/SC 1 Secretariat: ANSI
Voting begins on: Voting terminates on:
2023-08-16 2023-11-08
Refrigerating systems and heat pumps — Qualification of
tightness of components and joints
Systèmes de réfrigération et pompes à chaleur — Qualification de l'étanchéité des composants et des joints
ICS: 27.080; 27.200
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
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THEREFORE SUBJECT TO CHANGE AND MAY
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 14903:2023(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 2023
oSIST prEN ISO 14903:2023
ISO/DIS 14903:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 14903
ISO/TC 86/SC 1 Secretariat: ANSI
Voting begins on: Voting terminates on:
Refrigerating systems and heat pumps — Qualification of
tightness of components and joints
Systèmes de réfrigération et pompes à chaleur — Qualification de l'étanchéité des composants et des joints
ICS: 27.080; 27.200
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
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Reference number
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 14903:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
oSIST prEN ISO 14903:2023
ISO/DIS 14903:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols . 3
5 Test requirements . 3
6 Requirements for sealed systems . .8
7 Test procedures . 8
7.1 General . 8
7.2 Sampling . 8
7.3 Test temperature . 8
7.4 Tightness test . 9
7.4.1 General . 9
7.4.2 Tightness level control . 10
7.5 Requirements for joints .12
7.5.1 Test samples . 12
7.5.2 Torque . 12
7.5.3 Reusable joint .12
7.5.4 Requirements for hermetically sealed joints .12
7.6 Pressure-temperature vibration tests (PTV) . 13
7.6.1 General .13
7.6.2 Samples .13
7.6.3 Test equipment and arrangements . 13
7.6.4 Method: Combined pressure-temperature cycle test with a separate
vibration test . 14
7.7 Operation simulation . 18
7.8 Freezing test . 18
7.9 Additional pressure test for hermetically-sealed joints . 20
7.10 Vacuum test . 20
7.11 Compatibility screening test . 20
7.11.1 General .20
7.11.2 Test fluids . . .20
7.11.3 Test specimens . 21
7.11.4 Test setup parameters . 21
7.11.5 Test procedure. 21
7.11.6 Pass/fail criteria for sealing elements . 22
7.12 Fatigue test for hermetically sealed joints . 23
8 Test report .23
9 Information to the user .24
Annex A (informative) Equivalent tightness control levels .25
Bibliography .31
iii
oSIST prEN ISO 14903:2023
ISO/DIS 14903:2023(E)
Foreword
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electrotechnical standardization.
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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
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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 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).
This third edition cancels and replaces the second edition (ISO 14903:2017), which has been technically
revised.
The main changes are as follows:
— update of the test procedure (deletion of previous Meth
...
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