ISO 23632:2021

Industrial valves — Design validation-testing of valves

Le présent document spécifie les exigences et les critères d’acceptation pour les essais de type, conformes aux conditions de conception, des robinets à tournant sphérique métalliques et robinets à papillon métalliques utilisés pour des services de sectionnement pour toutes les applications industrielles, et sert à valider la conception des produits sur 205 cycles. Le présent document exclut les essais de dispositifs de sécurité, de robinets de régulation, de robinets en matériaux thermoplastiques, et des robinets pour l’alimentation en eau destinée à la consommation humaine et en eaux usées (par exemple la série EN 1074). Le présent document définit la procédure permettant d’étendre la qualification de l’appareil de robinetterie soumis à l’essai à des désignations de dimensions et de pression non soumises à l’essai de la même gamme de produits. Cet essai de type a pour objet de valider la performance de siège pour la relation pression/température précisée par le fabricant, qui figure dans la documentation technique du produit donnée par le fabricant. Cet essai de type vérifie les exigences de couple et le couple de manœuvre maximale admissible (MAST), tels que donnés dans la documentation technique du fabricant. Cet essai de type valide la durabilité de la performance de siège et le couple de manœuvre grâce à des cycles mécaniques et thermiques.

Robinetterie industrielle — Essais de validation de la conception des appareils de robinetterie

General Information

• Status: Published
• Publication Date: 10-May-2021
• ICS: 23.060.01 - Valves in general
• Technical Committee: ISO/TC 153 - Valves
• Drafting Committee: ISO/TC 153 - Valves
• Current Stage: 9092 - International Standard to be revised
• Start Date: 12-May-2025
• Completion Date: 17-May-2025

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 23632
First edition
2021-05
Industrial valves — Design validation-
testing of valves
Robinetterie industrielle - Essais de validation de la conception des
appareils de robinetterie
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Type test . 3
4.1 Test condition . 3
4.1.1 General. 3
4.1.2 Closure test . 3
4.1.3 Torque measurement . 4
4.1.4 Temperature measurement . 4
4.1.5 Test facility and safety rules . 6
4.1.6 Mechanical-cycle classes . 6
4.2 Test description . 7
4.2.1 General. 7
4.2.2 Test temperatures . 7
4.2.3 Closure test . 8
4.2.4 Unseating torque . 8
4.2.5 Maximum allowable stem torque (MAST) . 8
4.2.6 Post-test examination . 8
4.2.7 Qualification . 8
4.3 Test report . 9
5 Extensions of qualification to the product range. 9
Annex A (informative) Report template .12
Bibliography .14
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 153, Valves.
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.
iv © ISO 2021 – All rights reserved

Introduction
The scope of this document is currently limited to ball and butterfly valves.
The objective of this document is to outline the requirements and methods for evaluating the
performance of metallic industrial valves with respect to seat performance and operating torque
capability. Fugitive emission performance was omitted, as it is covered by ISO 15848-1. The number
of cycles (205) is consistent with the number in C01 of ISO 15848-1:2015. It serves to test the accuracy
and dependability of the measurements and capabilities of a valve as published by the manufacturer in
the valve’s technical documentation.
Type validation is the most reliable method to validate a range of valve products, covering many
aspects, such as its design, material selection and manufacturing processes. It will also serve as a guide
for valve selection, allowing customers to compare different valve types, designs and brands.
Several major customers already require type tests, each having their own requirements and
specifications. Introducing a defined International Standard will reduce manufacturer's costs by
decreasing the number of qualifications, as well as decreasing end-user total cost-of-ownership, by
eliminating the possibility of unintentional design flaws.
This validation will improve performance and safety in the plants by enabling any customer to specify
durable type-tested industrial valves.
INTERNATIONAL STANDARD ISO 23632:2021(E)
Industrial valves — Design validation-testing of valves
1 Scope
This document specifies requirements and acceptance criteria for type testing, in compliance with
design conditions, of metallic butterfly and ball valves used for isolating services for all industrial
applications, and serves to validate the product design over 205 cycles.
This document excludes testing for safety devices, control valves, thermoplastics valves, and valves for
water supply for human consumption and sewage (e.g. the EN 1074 series).
This document defines the procedure for extending the qualification of the tested valve to untested
sizes and pressure designations of the same product range.
The purpose of this type test is to validate the seat performance within manufacturer given pressure/
temperature rating, provided by the manufacturer’s technical documentation of the product. This type
test verifies torque requirements and the maximum allowable stem torque (MAST), as given in the
manufacturer's technical documentation. This type test validates the durability of seat performance
and operating torque through mechanical and thermal cycles.
2 Normative references
The following documents are referred to in the text in such a way that some or all their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5208, Industrial valves — Pressure testing of metallic valves
ISO 15848-1, Industrial valves — Measurement, test and qualification procedures for fugitive emissions —
Part 1: Classification system and qualification procedures for type testing of valves
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5208 and ISO 15848-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www. iso. org/o bp
— IEC Electropedia: available at http:// www.e lectropedia. org/
3.1
asymmetric sealed valve
valve with an internal construction, which does not have a plane of symmetry perpendicular to the axis
of the body ends
Note 1 to entry: This is a valve where both seat and sealing elements are not identical.
3.2
bidirectional valve
valve designed for blocking the flow in both downstream and upstream directions
3.3
maximum allowable stem torque
MAST
maximum torque that can be applied to a valve stem or shaft without causing permanent deformation or
mechanical damage to the stem or any other components of the valve that prevent sealing or operation
3.4
minimum allowable temperature
minimum temperature for which the valve is designed
3.5
obturator
movable component of the valve whose position in the fluid flow path permits, restricts or obstructs
the fluid flow
3.6
operating mechanism
mechanism which translates the motion of the manual- or power-operated device to the motion of the
obturator (3.5)
3.7
post-test examination
disassembly, inspection and examination after completion of all the tests
3.8
qualified facility
independent test facility accredited and certified to perform valve type testing
3.9
room temperature
RT
temperature in the range of +5 °C to +40 °C
3.10
seating torque
torque applied to the shaft to move the obturator (3.5) into contact with the seat immediately prior to
the closure test
3.11
seat performance
closure test over a range of mechanical, pressure and temperature cycles
3.12
symmetric sealed valve
valve with an internal construction which has a plane of symmetry perpendicular to the axis of the
body ends
Note 1 to entry: This is a valve where both seat and sealing elements are identical.
3.13
torque measurement
measurement of seating (3.10) and unseating torques (3.14) using calibrated measuring equipment
3.14
unseating torque
torque applied to open the valve against the maximum differential pressure
3.15
design validation testing
protocol where valves are type tested at the maximum rated pressures and design temperature ranges
as specified by the manufacturer
2 © ISO 2021 – All rights reserved

3.16
unidirectional valve
valve designed for blocking the flow in either downstream or upstream direction only
4 Type test
4.1 Test condition
4.1.1 General
The valve manufacturer shall issue a declaration of conformity that the valve to be tested is
representative of the products that are being shipped to customers and is not specially prepared for
this test. The valve to be tested may be externally coated or painted.
This declaration of conformity shall state that the valve components and the assembled valve have
undergone all the manufacturing, assembly and hydrostatic shell test steps of the typical quality control
plan pr
...

INTERNATIONAL ISO
STANDARD 23632
First edition
2021-05
Industrial valves — Design validation-
testing of valves
Robinetterie industrielle - Essais de validation de la conception des
appareils de robinetterie
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Type test . 3
4.1 Test condition . 3
4.1.1 General. 3
4.1.2 Closure test . 3
4.1.3 Torque measurement . 4
4.1.4 Temperature measurement . 4
4.1.5 Test facility and safety rules . 6
4.1.6 Mechanical-cycle classes . 6
4.2 Test description . 7
4.2.1 General. 7
4.2.2 Test temperatures . 7
4.2.3 Closure test . 8
4.2.4 Unseating torque . 8
4.2.5 Maximum allowable stem torque (MAST) . 8
4.2.6 Post-test examination . 8
4.2.7 Qualification . 8
4.3 Test report . 9
5 Extensions of qualification to the product range. 9
Annex A (informative) Report template .12
Bibliography .14
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 153, Valves.
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.
iv © ISO 2021 – All rights reserved

Introduction
The scope of this document is currently limited to ball and butterfly valves.
The objective of this document is to outline the requirements and methods for evaluating the
performance of metallic industrial valves with respect to seat performance and operating torque
capability. Fugitive emission performance was omitted, as it is covered by ISO 15848-1. The number
of cycles (205) is consistent with the number in C01 of ISO 15848-1:2015. It serves to test the accuracy
and dependability of the measurements and capabilities of a valve as published by the manufacturer in
the valve’s technical documentation.
Type validation is the most reliable method to validate a range of valve products, covering many
aspects, such as its design, material selection and manufacturing processes. It will also serve as a guide
for valve selection, allowing customers to compare different valve types, designs and brands.
Several major customers already require type tests, each having their own requirements and
specifications. Introducing a defined International Standard will reduce manufacturer's costs by
decreasing the number of qualifications, as well as decreasing end-user total cost-of-ownership, by
eliminating the possibility of unintentional design flaws.
This validation will improve performance and safety in the plants by enabling any customer to specify
durable type-tested industrial valves.
INTERNATIONAL STANDARD ISO 23632:2021(E)
Industrial valves — Design validation-testing of valves
1 Scope
This document specifies requirements and acceptance criteria for type testing, in compliance with
design conditions, of metallic butterfly and ball valves used for isolating services for all industrial
applications, and serves to validate the product design over 205 cycles.
This document excludes testing for safety devices, control valves, thermoplastics valves, and valves for
water supply for human consumption and sewage (e.g. the EN 1074 series).
This document defines the procedure for extending the qualification of the tested valve to untested
sizes and pressure designations of the same product range.
The purpose of this type test is to validate the seat performance within manufacturer given pressure/
temperature rating, provided by the manufacturer’s technical documentation of the product. This type
test verifies torque requirements and the maximum allowable stem torque (MAST), as given in the
manufacturer's technical documentation. This type test validates the durability of seat performance
and operating torque through mechanical and thermal cycles.
2 Normative references
The following documents are referred to in the text in such a way that some or all their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 5208, Industrial valves — Pressure testing of metallic valves
ISO 15848-1, Industrial valves — Measurement, test and qualification procedures for fugitive emissions —
Part 1: Classification system and qualification procedures for type testing of valves
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5208 and ISO 15848-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www. iso. org/o bp
— IEC Electropedia: available at http:// www.e lectropedia. org/
3.1
asymmetric sealed valve
valve with an internal construction, which does not have a plane of symmetry perpendicular to the axis
of the body ends
Note 1 to entry: This is a valve where both seat and sealing elements are not identical.
3.2
bidirectional valve
valve designed for blocking the flow in both downstream and upstream directions
3.3
maximum allowable stem torque
MAST
maximum torque that can be applied to a valve stem or shaft without causing permanent deformation or
mechanical damage to the stem or any other components of the valve that prevent sealing or operation
3.4
minimum allowable temperature
minimum temperature for which the valve is designed
3.5
obturator
movable component of the valve whose position in the fluid flow path permits, restricts or obstructs
the fluid flow
3.6
operating mechanism
mechanism which translates the motion of the manual- or power-operated device to the motion of the
obturator (3.5)
3.7
post-test examination
disassembly, inspection and examination after completion of all the tests
3.8
qualified facility
independent test facility accredited and certified to perform valve type testing
3.9
room temperature
RT
temperature in the range of +5 °C to +40 °C
3.10
seating torque
torque applied to the shaft to move the obturator (3.5) into contact with the seat immediately prior to
the closure test
3.11
seat performance
closure test over a range of mechanical, pressure and temperature cycles
3.12
symmetric sealed valve
valve with an internal construction which has a plane of symmetry perpendicular to the axis of the
body ends
Note 1 to entry: This is a valve where both seat and sealing elements are identical.
3.13
torque measurement
measurement of seating (3.10) and unseating torques (3.14) using calibrated measuring equipment
3.14
unseating torque
torque applied to open the valve against the maximum differential pressure
3.15
design validation testing
protocol where valves are type tested at the maximum rated pressures and design temperature ranges
as specified by the manufacturer
2 © ISO 2021 – All rights reserved

3.16
unidirectional valve
valve designed for blocking the flow in either downstream or upstream direction only
4 Type test
4.1 Test condition
4.1.1 General
The valve manufacturer shall issue a declaration of conformity that the valve to be tested is
representative of the products that are being shipped to customers and is not specially prepared for
this test. The valve to be tested may be externally coated or painted.
This declaration of conformity shall state that the valve components and the assembled valve have
undergone all the manufacturing, assembly and hydrostatic shell test steps of the typical quality control
plan pr
...

NORME ISO
INTERNATIONALE 23632
Première édition
2021-05
Robinetterie industrielle — Essais
de validation de la conception des
appareils de robinetterie
Industrial valves — Design validation-testing of valves
Numéro de référence
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2021
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: [phone]
E-mail: [e-mail]
Web: www.iso.org
Publié en Suisse
ii
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives .1
3 Termes et définitions . 1
4 Essai de type . 3
4.1 Condition d’essai . 3
4.1.1 Généralités . 3
4.1.2 Essai à la fermeture . 3
4.1.3 Mesurage du couple . 4
4.1.4 Mesurage de la température . 4
4.1.5 Installation d’essai et règles de sécurité . 6
4.1.6 Classes de cycles mécaniques . 6
4.2 Description de l’essai . 7
4.2.1 Généralités . 7
4.2.2 Températures d’essai . 7
4.2.3 Essai à la fermeture . 8
4.2.4 Couple de déblocage . 8
4.2.5 Couple de manœuvre maximale admissible (MAST) . 8
4.2.6 Examen après les essais . 8
4.2.7 Qualification . 9
4.3 Rapport d’essai . 9
5 Extensions de la qualification à la gamme de produits . 9
Annexe A (informative) Modèle de rapport . .12
Bibliographie .14
iii
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes
nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est
en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.
L’ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L’attention est attirée sur le fait que certains des éléments du présent document peuvent faire l’objet de
droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l’élaboration du document sont indiqués dans l’Introduction et/ou dans la liste des déclarations de
brevets reçues par l’ISO (voir www.iso.org/patents).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion
de l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www.iso.org/iso/foreword.html.
Le présent document a été élaboré par le Comité technique ISO/TC 153, Robinetterie.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
iv
Introduction
Le domaine d’application du présent document est actuellement limité aux robinets à tournant
sphérique et aux robinets à papillon.
L’objectif du présent document est de présenter les exigences et les méthodes permettant d’évaluer la
performance d’appareils métalliques de robinetterie industrielle en ce qui concerne la performance de
siège et la capacité de couple de manœuvre. La performance d’émissions fugitives a été omise, puisqu’elle
est couverte par l’ISO 15848-1. Le nombre de cycles (205) est cohérent avec le nombre indiqué en C01 de
l’ISO 15848-1:2015. Il sert à soumettre à l’essai la précision et la fiabilité des mesurages et des capacités
d’un appareil de robinetterie tels que publiés par le fabricant dans la documentation technique de
l’appareil de robinetterie.
La validation de type est la méthode la plus fiable pour valider une gamme de produits d'appareil
de robinetterie, couvrant de nombreux aspects, tels que sa conception, le choix des matériaux et les
procédés de fabrication. Il servira également de guide pour le choix d’appareils de robinetterie,
permettant aux clients de comparer différents types, conceptions et marques d’appareil de robinetterie.
Plusieurs clients majeurs requièrent déjà des essais de type, chacun ayant ses propres exigences et
spécifications. L’introduction d’une Norme internationale définie réduira les coûts du fabricant en
faisant diminuer le nombre de qualifications, et abaissera également le coût de possession total de
l’utilisateur final, en éliminant la possibilité de défauts de conception involontaires.
Cette validation va améliorer la performance et la sécurité dans les usines en permettant à tout client
de spécifier des appareils de robinetterie industriels durables soumis à des essais de type.
v
NORME INTERNATIONALE ISO 23632:2021(F)
Robinetterie industrielle — Essais de validation de la
conception des appareils de robinetterie
1 Domaine d’application
Le présent document spécifie les exigences et les critères d’acceptation pour les essais de type,
conformes aux conditions de conception, des robinets à tournant sphérique métalliques et robinets
à papillon métalliques utilisés pour des services de sectionnement pour toutes les applications
industrielles, et sert à valider la conception des produits sur 205 cycles.
Le présent document exclut les essais de dispositifs de sécurité, de robinets de régulation, de robinets
en matériaux thermoplastiques, et des robinets pour l’alimentation en eau destinée à la consommation
humaine et en eaux usées (par exemple la série EN 1074).
Le présent document définit la procédure permettant d’étendre la qualification de l’appareil de
robinetterie soumis à l’essai à des désignations de dimensions et de pression non soumises à l’essai de
la même gamme de produits.
Cet essai de type a pour objet de valider la performance de siège pour la relation pression/température
précisée par le fabricant, qui figure dans la documentation technique du produit donnée par le fabricant.
Cet essai de type vérifie les exigences de couple et le couple de manœuvre maximale admissible (MAST),
tels que donnés dans la documentation technique du fabricant. Cet essai de type valide la durabilité de
la performance de siège et le couple de manœuvre grâce à des cycles mécaniques et thermiques.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique.
Pour les références non datées, la dernière édition du document de référence s’applique (y compris les
éventuels amendements).
ISO 5208, Robinetterie industrielle — Essais sous pression des appareils de robinetterie métalliques
ISO 15848-1, Robinetterie industrielle — Mesurage, essais et modes opératoires de qualification pour
émissions fugitives — Partie 1: Système de classification et modes opératoires de qualification pour les
essais de type des appareils de robinetterie
3 Termes et définitions
Pour les besoins du présent document, les termes et les définitions de l’ISO 5208 et de l’ISO 15848-1,
ainsi que les suivants s’appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l’adresse https:// www .electropedia .org/
3.1
appareil de robinetterie à éléments d’étanchéité asymétriques
appareil de robinetterie dont la construction interne ne présente pas un plan de symétrie
perpendiculaire à l’axe des extrémités du corps
Note 1 à l'article: Il s’agit d’un appareil de robinetterie dont à la fois le siège et les éléments d’étanchéité ne sont
pas identiques.
3.2
appareil de robinetterie bidirectionnel
appareil de robinetterie conçu pour bloquer le débit à la fois dans les directions aval et amont
3.3
couple de manœuvre maximale admissible
MAST
couple maximal qui peut être appliqué à une tige ou un arbre d’appareil de robinetterie sans soumettre
la tige ou tous autres composants de l’appareil de robinetterie à une déformation permanente ou un
dommage mécanique qui empêche l’étanchéité ou la manœuvre
3.4
température minimale admissible
température minimale pour laquelle l’appareil de robinetterie est conçu
3.5
obturateur
composant mobile de l’appareil de robinetterie dont la position dans l’écoulement du fluide permet,
restreint ou sectionne l’écoulement du fluide
3.6
mécanisme de manœuvre
mécanisme qui transforme le mouvement du dispositif de manœuvre manuel ou motorisé en mouvement
de l’obturateur (3.5)
3.7
examen après les essais
démontage, contrôle et examen après exécution de tous les essais
3.8
installation qualifiée
installation d’essai indépendante accréditée et certifiée pour réaliser des essais de type sur des
appareils de robinetterie
3.9
température ambiante
RT
tempér
...