EN ISO 28921-2:2017

Industrial valves - Isolating valves for low-temperature applications - Part 2: Type testing (ISO 28921-2:2015)

ISO 28921-2:2015 specifies requirements for the type testing of isolating valves for low-temperature applications to verify the performance of valves at a low temperature from ? 50 °C down to ? 196 °C.
NOTE          Nominal sizes (DN), nominal pipe sizes (NPS), nominal pressure (PN) and Classes are covered in ISO 28921‑1.
ISO 28921-2:2015 does not evaluate valve actuators unless they are integral part of the valve. Valves during testing can be operated manually or an actuator can be used during the testing. The effect of cold gas vapours during testing is taken into consideration in particular if the actuator is mounted directly over the test stand with the cold gases engulfing the actuator.
ISO 28921-2:2015 does not apply to valves for cryogenic services, designed in accordance with ISO 21011, used with cryogenic vessels.

Industriearmaturen - Absperrventile für die Anwendung im Tieftemperaturbereich - Teil 2: Typprüfung (ISO 28921-2:2015)

Dieser Teil der ISO 28921 legt Anforderungen an die Typprüfung von Absperrventilen für Tieftemperaturanwendungen zur Verifikation der Leistungsfähigkeit von Ventilen bei Tieftemperaturen von −50 °C bis −196 °C fest.
ANMERKUNG   Nennweiten (DN), Nennrohrgrößen (NPS), Nenndrücke (PN) und „Classes“ werden durch ISO 28921 1 abgedeckt.
Dieser Teil der ISO 28921 bewertet keine Ventilantriebe, sofern diese nicht ein integraler Bestandteil des Ventils sind. Ventile können während der Prüfung händisch oder per Ventilantrieb betätigt werden. Die Auswirkungen von Kaltgasdämpfen während der Prüfung müssen berücksichtigt werden, insbesondere wenn der Ventilantrieb direkt oberhalb des Prüfstandes montiert ist und das Kaltgas den Ventilantrieb umhüllt.
Dieser Teil der ISO 28921 gilt nicht für Ventile für den kryogenen Betrieb, die in Übereinstimmung mit ISO 21011 für den Einsatz mit Kryo-Behältern ausgelegt sind.

Robinetterie industrielle - Robinets d'isolement pour application à basses températures - Partie 2: Essais de type (ISO 28921-2:2015)

ISO 28921-2:2015 spécifie les exigences relatives aux essais de type des robinets d'isolement pour applications à basses températures afin de vérifier les performances des appareils de robinetterie à une température basse comprise entre − 50 °C et − 196 °C.
NOTE          Les dimensions nominales (DN), les dimensions nominales de la tuyauterie (NPS), la pression nominale (PN) et les Class sont couverts par l'ISO 28921‑1.
ISO 28921-2:2015 n'évalue pas les actionneurs, sauf s'ils font partie intégrante de l'appareil de robinetterie. Pendant les essais, les appareils de robinetterie peuvent être actionnés manuellement ou un actionneur peut être utilisé. Pendant les essais, l'effet des vapeurs de gaz froid est pris en considération, en particulier lorsque l'actionneur est monté directement au-dessus du banc d'essai, les gaz froids enveloppant l'actionneur.
ISO 28921-2:2015 ne s'applique pas aux appareils de robinetterie pour usage cryogénique, conçus conformément à l'ISO 21011, utilisés avec des récipients cryogéniques.

Industrijski ventili - Zapirni ventili za uporabo pri nizki temperaturi - 2. del: Preskušanje tipa (ISO 28921-2:2015)

ISO 28921-2:2015 določa zahteve za preskušanje tipa izolacijskih ventilov za uporabo pri nizkih temperaturah za namene preverjanja učinkovitosti ventilov pri razponu nizke temperature od ? 50 °C do ? 196 °C.
OPOMBA: Nazivne velikosti (DN), nazivne velikosti cevi (NPS), nazivni tlak (PN) in razredi Class so zajeti v standardu ISO 28921 1.
ISO 28921-2:2015 ne predpisuje vrednotenja ventilskih dajalnikov, razen če so sestavni del ventila. Med preskušanjem se lahko ventili upravljajo ročno ali pa se uporablja dajalnik. Učinek hlapov hladnih plinov med preskušanjem je treba upoštevati zlasti, če je dajalnik nameščen neposredno nad preskusnim stojalom, pri čemer ga obdajajo hladni plini.
ISO 28921-2:2015 se ne uporablja za ventile za kriogeno delovanje, zasnovane v skladu s standardom ISO 21011, ki se uporabljajo s kriogenimi posodami.

General Information

• Status: Published
• Publication Date: 14-Feb-2017
• Withdrawal Date: 30-Aug-2017
• ICS: 23.060.01 - Valves in general
• Technical Committee: CEN/TC 69 - Industrial valves
• Drafting Committee: CEN/TC 69 - Industrial valves
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 15-Feb-2017
• Due Date: 04-Mar-2019
• Completion Date: 15-Feb-2017
• Ref Project: SIST EN ISO 28921-2:2017 - Industrial valves - Isolating valves for low-temperature applications - Part 2: Type testing (ISO 28921-2:2015)

Relations

• Replaces: EN 12567:2000 - Industrial valves - Isolating valves for LNG - Specification for suitability and appropriate verification tests
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 28921-2:2017
01-maj-2017
1DGRPHãþD
SIST EN 12567:2001
Industrijski ventili - Zapirni ventili za uporabo pri nizki temperaturi - 2. del:
Preskušanje tipa (ISO 28921-2:2015)
Industrial valves - Isolating valves for low-temperature applications - Part 2: Type testing
(ISO 28921-2:2015)
Robinetterie industrielle - Robinets d'isolement pour application à basses températures -
Partie 2: Essais de type (ISO 28921-2:2015)
Ta slovenski standard je istoveten z: EN ISO 28921-2:2017
ICS:
23.060.01 Ventili na splošno Valves in general
SIST EN ISO 28921-2:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 28921-2:2017

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SIST EN ISO 28921-2:2017


EN ISO 28921-2
EUROPEAN STANDARD

NORME EUROPÉENNE

February 2017
EUROPÄISCHE NORM
ICS 23.060.01 Supersedes EN 12567:2000
English Version

Industrial valves - Isolating valves for low-temperature
applications - Part 2: Type testing (ISO 28921-2:2015)
Robinetterie industrielle - Robinets d'isolement pour Industriearmaturen - Absperrventile für die
application à basses températures - Partie 2: Essais de Anwendung im Niedertemperaturbereich - Teil 2:
type (ISO 28921-2:2015) Typprüfung (ISO 28921-2:2015)
This European Standard was approved by CEN on 10 January 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 28921-2:2017 E
worldwide for CEN national Members.

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SIST EN ISO 28921-2:2017
EN ISO 28921-2:2017 (E)
Contents Page
European foreword . 3

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SIST EN ISO 28921-2:2017
EN ISO 28921-2:2017 (E)
European foreword
The text of ISO 28921-2:2015 has been prepared by Technical Committee ISO/TC 153 “Valves” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 28921-2:2017
by Technical Committee CEN/TC 69 “Industrial valves” the secretariat of which is held by AFNOR.
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 August 2017, and conflicting national standards shall
be withdrawn at the latest by August 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
EN ISO 28921-1 and EN ISO 28921-2 supersede EN 12567:2000.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 28921-2:2015 has been approved by CEN as EN ISO 28921-2:2017 without any
modification.


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SIST EN ISO 28921-2:2017

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SIST EN ISO 28921-2:2017
INTERNATIONAL ISO
STANDARD 289
...