SIST EN ISO 23632:2022
(Main)Industrial valves - Design validation-testing of valves (ISO 23632:2021)
Industrial valves - Design validation-testing of valves (ISO 23632:2021)
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.
Industriearmaturen - Validierungsprüfung der Konstruktion von Armaturen (ISO 23632:2021)
Dieses Dokument legt Anforderungen und Abnahmekriterien für die Typprüfung von metallischen Klappen und Kugelventilen für die Isolierung von Versorgungsleitungen für alle industriellen Anwendungen in Übereinstimmung mit den Gestaltungsbedingungen fest und dient der Validierung der Produktgestaltung über 205 Zyklen.
Dieses Dokument schließt Prüfungen von Sicherheitseinrichtungen, Regelarmaturen, thermoplastischen Armaturen sowie Trinkwasser- und Abwasserarmaturen (z. B. die Normenreihe EN 1074) aus.
Dieses Dokument legt Verfahren für die Erweiterung der Qualifikation der geprüften Armatur auf ungeprüfte Größen und Druckangaben desselben Produktbereichs fest.
Diese Typprüfung dient dazu, die Leistung des Sitzes innerhalb des von dem Hersteller angegebenen Druck-/ Temperaturbemessungsbereichs wie in der technischen Produktdokumentation des Herstellers angegeben zu validieren. Diese Typprüfung verifiziert die Momentanforderungen und das maximal zulässige Drehmoment der Schaftwelle (MAST) wie in der technischen Dokumentation des Herstellers angegeben. Diese Typprüfung validiert die Dauerhaftigkeit der Sitzleistung und des Betätigungsmoments durch mechanische und thermische Zyklen.
Robinetterie industrielle - Essais de validation de la conception des appareils de robinetterie (ISO 23632:2021)
Industrijski ventili - Validacija zasnove in preskušanje ventilov (ISO 23632:2021)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 23632:2022
01-december-2022
Industrijski ventili - Validacija zasnove in preskušanje ventilov (ISO 23632:2021)
Industrial valves - Design validation-testing of valves (ISO 23632:2021)
Industriearmaturen - Validierungsprüfung der Konstruktion von Armaturen (ISO
23632:2021)
Robinetterie industrielle - Essais de validation de la conception des appareils de
robinetterie (ISO 23632:2021)
Ta slovenski standard je istoveten z: EN ISO 23632:2022
ICS:
23.060.01 Ventili na splošno Valves in general
SIST EN ISO 23632:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 23632:2022
---------------------- Page: 2 ----------------------
SIST EN ISO 23632:2022
EN ISO 23632
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 23.060.01
English Version
Industrial valves - Design validation-testing of valves (ISO
23632:2021)
Robinetterie industrielle - Essais de validation de la Industriearmaturen - Validierungsprüfung der
conception des appareils de robinetterie (ISO Konstruktion von Armaturen (ISO 23632:2021)
23632:2021)
This European Standard was approved by CEN on 2 October 2022.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23632:2022 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 23632:2022
EN ISO 23632:2022 (E)
Contents Page
European foreword . 3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 23632:2022
EN ISO 23632:2022 (E)
European foreword
The text of ISO 23632:2021 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 23632:2022 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 April 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 23632:2021 has been approved by CEN as EN ISO 23632:2022 without any modification.
3
---------------------- Page: 5 ----------------------
SIST EN ISO 23632:2022
---------------------- Page: 6 ----------------------
SIST EN ISO 23632:2022
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 23632:2021(E)
©
ISO 2021
---------------------- Page: 7 ----------------------
SIST EN ISO 23632:2022
ISO 23632:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© 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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 23632:2022
ISO 23632:2021(E)
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
© ISO 2021 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 23632:2022
ISO 23632:2021(E)
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
---------------------- Page: 10 ----------------------
SIST EN ISO 23632:2022
ISO 23632:2021(E)
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.
© ISO 2021 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 23632:2022
---------------------- Page: 12 ----------------------
SIST EN ISO 23632:2022
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
© ISO 2021 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 23632:2022
ISO 23632:2021(E)
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
---------------------- Page: 14 ----------------------
SIST EN ISO 23632:2022
ISO 23632:2021(E)
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 provided by the manufacturer.
The allowable seat leakage rates, according to ISO 5208, shall be specified by the valve manufacturer
before the start of the type test.
The test equipment shall be appropriately selected to assure it adheres to the specific type test
...
SLOVENSKI STANDARD
oSIST prEN ISO 23632:2022
01-september-2022
Industrijski ventili - Validacija zasnove in preskušanje ventilov (ISO 23632:2021)
Industrial valves - Design validation-testing of valves (ISO 23632:2021)
Industriearmaturen - Validierungsprüfung der Konstruktion von Armaturen (ISO
23632:2021)
Robinetterie industrielle - Essais de validation de la conception des appareils de
robinetterie (ISO 23632:2021)
Ta slovenski standard je istoveten z: prEN ISO 23632
ICS:
23.060.01 Ventili na splošno Valves in general
oSIST prEN ISO 23632:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 23632:2022
---------------------- Page: 2 ----------------------
oSIST prEN ISO 23632:2022
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 23632:2021(E)
©
ISO 2021
---------------------- Page: 3 ----------------------
oSIST prEN ISO 23632:2022
ISO 23632:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© 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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 23632:2022
ISO 23632:2021(E)
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
© ISO 2021 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 23632:2022
ISO 23632:2021(E)
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
---------------------- Page: 6 ----------------------
oSIST prEN ISO 23632:2022
ISO 23632:2021(E)
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.
© ISO 2021 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 23632:2022
---------------------- Page: 8 ----------------------
oSIST prEN ISO 23632:2022
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
© ISO 2021 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 23632:2022
ISO 23632:2021(E)
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
---------------------- Page: 10 ----------------------
oSIST prEN ISO 23632:2022
ISO 23632:2021(E)
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 provided by the manufacturer.
The allowable seat leakage rates, according to ISO 5208, shall be specified by the valve manufacturer
before the start of the type test.
The test equipment shall be appropriately selected to assure it adheres to the specific type test
operating conditions. This equipment should also be in accordance with the applicable health, safety
and environmental management system.
All measuring instruments shall be calibrated and shall be within their period of validity at the date of
testing.
4.1.2 Closure test
Pressure test for the purpose of validating leakage through a valve’s closure mechanism shall be
measured with dry air or other suitable gas using the mandatory closure test procedure given in
ISO 5208 per the applicable product standard. Over 5 MPa (50 bars), self-ignition risks shall be
considered when testing with dry air.
For a closure test performed at high or low temperature, the temperature of the exiting test gas shall be
measured (before the flowmeter) and verified to be within the calibration range of the flowmeter. For
volume flow measurement it is required to correct that measurement for the effect of temperature, or
to bring the temperature of the exiting test gas within room temperature.
The perfect gas relationship assuming constant pressure shall be used to determine the equivalent flow
rate at room temperature. See ISO 28921-1 for the detailed calculation.
QT×
12
Q = (1)
2
T
1
where
T is the test gas temperature entering the flowmeter, in Kelvin (K);
1
T is 298 K, the standard ambient temperature, in Kelvin (K);
2
3
Q is the test gas flow exiting the flowmeter, in cubic millimetres per second (mm /s);
1
Q is the corrected test gas flow exiting the flowmeter at room temperature, in cubic millimetres
2
3
per second (mm /s).
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oSIST prEN ISO 23632:2022
ISO 23632:2021(E)
Electronic mass flowmeters are not affected by pressure or temperature changes. When such flowmeter
is used, test gas pressure and temperature measurements (as well as correction) at the flowmeter is not
required.
For a closure test performed at high temperature, the test pressure shall be 1,1 × the maximum rated
pressure
...
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