SIST EN ISO 10497:2011
(Main)Testing of valves - Fire type-testing requirements (ISO 10497:2010)
Testing of valves - Fire type-testing requirements (ISO 10497:2010)
This International Standard specifies fire type-testing requirements and a fire type-test method for confirming the pressure-containing capability of a valve under pressure during and after the fire test. It is not applicable to the testing requirements for valve actuators other than manually operated gear boxes or similar mechanisms when these form part of the normal valve assembly. Other types of valve actuators (e.g. electrical, pneumatic or hydraulic) can need special protection to operate in the environment considered in this valve test, and the fire testing of such actuators is outside the scope of this International Standard. Fire test certificates of valves previously tested according to previous editions of ISO 10497 and to similar internationally recognized fire test standards are also acceptable.
Prüfung von Armaturen - Anforderungen an die Typprüfung auf Feuersicherheit (ISO 10497:2010)
Diese Internationale Norm legt Anforderungen an die Typprüfung auf Feuersicherheit und das zugehörige
Verfahren zum Nachweis der Druckfestigkeit einer Armatur fest, die während und nach der Feuersicherheitsprüfung
mit Druck beaufschlagt wird. Sie enthält keine Prüfanforderungen an Stellantriebe, ausgenommen
handbetätigte Schaltgetriebe oder ähnliche Mechanismen, wenn diese Teile der Standardausführung sind.
Andere Stellantriebe (z. B. elektrische, pneumatische oder hydraulische) müssen eventuell für diese Armaturenprüfung
mit einem besonderen Schutz versehen werden und die Prüfung der Feuersicherheit solcher
Antriebe liegt nicht im Anwendungsbereich dieser Norm.
Bescheinigungen über die Prüfung auf Feuersicherheit von Armaturen, die nach früheren Ausgaben der
ISO 10497 und ähnlichen, international anerkannten Feuersicherheitsprüfnormen geprüft wurden, sind ebenfalls
annehmbar.
ANMERKUNG Für die Anwendung dieser Internationalen Norm sind die Begriffe „Typprüfung auf Feuersicherheit“ und
„Feuersicherheitsprüfung“ gleichbedeutend.
Essais des appareils de robinetterie - Exigences de l'essai au feu (ISO 10497:2010)
L'ISO 10497:2010 spécifie les exigences d'un essai type au feu et une méthode d'essai type au feu permettant d'établir la capacité de tenue en pression d'un appareil de robinetterie sous pression pendant et après l'exécution de l'essai au feu. Elle ne traite pas des conditions d'essai des actionneurs des appareils de robinetterie autres que des réducteurs manuels ou autres mécanismes du même type liés à l'appareil normalement assemblé. D'autres types d'actionneurs (par exemple électriques, pneumatiques ou hydrauliques) peuvent, compte tenu des conditions du présent essai, nécessiter des protections particulières, et leur contrôle sort du cadre de l'ISO 10497:2010.
Preskušanje ventilov - Zahteve za protipožarno preskušanje (ISO 10497:2010)
Ta mednarodni standard določa zahteve za protipožarno preskušanje in metodo za protipožarno preskušanje za potrditev tlačne zmogljivosti ventila pod tlakom med protipožarnim preskušanjem in po njem. Ne velja za preskusne zahteve za pogone za ventile, ki niso ročno upravljani menjalniki ali podobni mehanizmi, kadar so ti del normalnega sestava ventilov. Druge vrste pogonov za ventile (npr. električni, pnevmatični ali hidravlični) lahko potrebujejo posebno zaščito za delovanje v okolju, obravnavanem pri tem preskusu ventilov, in protipožarno preskušanje takih pogonov je zunaj obsega uporabe tega mednarodnega standarda. Sprejemljivi so tudi certifikati protipožarnega preskušanja ventilov, ki so bili predhodno preskušani v skladu s prejšnjimi izdajami ISO 10497 in podobnimi mednarodno priznanimi standardi protipožarnega preskušanja.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 10497:2011
01-november-2011
1DGRPHãþD
SIST EN ISO 10497:2004
Preskušanje ventilov - Zahteve za protipožarno preskušanje (ISO 10497:2010)
Testing of valves - Fire type-testing requirements (ISO 10497:2010)
Prüfung von Armaturen - Anforderungen an die Typprüfung auf Feuersicherheit (ISO
10497:2010)
Essais des appareils de robinetterie - Exigences de l'essai au feu (ISO 10497:2010)
Ta slovenski standard je istoveten z: EN ISO 10497:2010
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
23.060.01 Ventili na splošno Valves in general
SIST EN ISO 10497:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 10497:2011
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SIST EN ISO 10497:2011
EUROPEAN STANDARD
EN ISO 10497
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2010
ICS 23.060.01 Supersedes EN ISO 10497:2004
English Version
Testing of valves - Fire type-testing requirements (ISO
10497:2010)
Essais des appareils de robinetterie - Exigences de l'essai Prüfung von Armaturen - Anforderungen an die Typprüfung
au feu (ISO 10497:2010) auf Feuersicherheit (ISO 10497:2010)
This European Standard was approved by CEN on 26 January 2010.
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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10497:2010: E
worldwide for CEN national Members.
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SIST EN ISO 10497:2011
EN ISO 10497:2010 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 10497:2011
EN ISO 10497:2010 (E)
Foreword
This document (EN ISO 10497:2010) has been prepared by Technical Committee ISO/TC 153 "Valves" in
collaboration with 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 2010, and conflicting national standards shall be withdrawn at
the latest by August 2010.
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.
This document supersedes EN ISO 10497:2004.
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 10497:2010 has been approved by CEN as a EN ISO 10497:2010 without any modification.
3
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SIST EN ISO 10497:2011
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SIST EN ISO 10497:2011
INTERNATIONAL ISO
STANDARD 10497
Third edition
2010-02-15
Testing of valves — Fire type-testing
requirements
Essais des appareils de robinetterie — Exigences de l'essai au feu
Reference number
ISO 10497:2010(E)
©
ISO 2010
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SIST EN ISO 10497:2011
ISO 10497:2010(E)
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All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
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Published in Switzerland
ii © ISO 2010 – All rights reserved
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SIST EN ISO 10497:2011
ISO 10497:2010(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Test conditions .2
4.1 Direction and conditions for valves to be tested .2
4.2 Pressure relief provision .3
5 Fire test method.3
5.1 General warning .3
5.2 Principle.3
5.3 Apparatus.3
5.4 Test fluid.4
5.5 Test fuel.4
5.6 Procedure.4
6 Performance.10
6.1 General .10
6.2 Through-seat leakage during burn period.10
6.3 External leakage during burn and cool-down periods .10
6.4 Low-pressure test through-seat leakage after cool-down .11
6.5 Operability.11
6.6 External leakage following operational test .11
6.7 Test report.12
7 Qualification of other valves by representative size, pressure rating and materials of
construction.13
7.1 General .13
7.2 Materials of construction.13
7.3 Qualification of valves by nominal size .14
7.4 Qualification of valves by pressure rating.14
7.5 Special marking .14
Bibliography.16
© ISO 2010 – All rights reserved iii
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SIST EN ISO 10497:2011
ISO 10497:2010(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 10497 was prepared by Technical Committee ISO/TC 153, Valves, Subcommittee SC 1, Design,
manufacture, marking and testing.
This third edition cancels and replaces the second edition (ISO 10497:2004), which has been technically
revised.
iv © ISO 2010 – All rights reserved
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SIST EN ISO 10497:2011
ISO 10497:2010(E)
Introduction
This International Standard covers the requirements and method for evaluating the performance of valves
when they are exposed to defined fire conditions. The performance requirements establish limits of
acceptability of a valve, regardless of size or pressure rating. The burn period has been established to
represent the maximum time required to extinguish most fires. Fires of longer duration are considered to be of
major magnitude, with consequences greater than those anticipated in the test.
The test pressure during the burn is set at 0,2 MPa (2 bar) for soft-seated valves rated PN 10, PN 16, PN 25
and PN 40, Class 150 and Class 300, to better simulate the conditions that would be expected in a process
plant when a fire is detected and pumps are shut down. In this case, the source of pressure in the system is
the hydrostatic head resulting from liquid levels in towers and vessels. This situation is approximated by this
lower test pressure.
In production facilities, valves are typically of a higher rating and the pressure source is not easily reduced
when a fire is detected. Therefore, for all other valves, the test pressure during the burn is set at a higher
value to better simulate the expected service conditions in these facilities.
Use of this International Standard assumes that the execution of its provisions is entrusted to appropriately
qualified and experienced personnel, because it calls for procedures that can be injurious to health, if
adequate precautions are not taken. This International Standard refers only to technical suitability and does
not absolve the user from legal obligations relating to health and safety at any stage of the procedure.
© ISO 2010 – All rights reserved v
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SIST EN ISO 10497:2011
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SIST EN ISO 10497:2011
INTERNATIONAL STANDARD ISO 10497:2010(E)
Testing of valves — Fire type-testing requirements
1 Scope
This International Standard specifies fire type-testing requirements and a fire type-test method for confirming
the pressure-containing capability of a valve under pressure during and after the fire test. It is not applicable to
the testing requirements for valve actuators other than manually operated gear boxes or similar mechanisms
when these form part of the normal valve assembly. Other types of valve actuators (e.g. electrical, pneumatic
or hydraulic) can need special protection to operate in the environment considered in this valve test, and the
fire testing of such actuators is outside the scope of this International Standard.
Fire test certificates of valves previously tested according to previous editions of ISO 10497 and to similar
internationally recognized fire test standards are also acceptable.
NOTE For the purposes of this International Standard, the terms “fire type-test” and “fire test” are synonymous.
2 Normative references
The following referenced documents are indispensable for the application 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 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
IEC 60584-2, Thermocouples — Part 2: Tolerances
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
nominal size
DN
alphanumeric designation of size for components of a pipework system, which is used for reference purposes,
comprising the letters DN followed by a dimensionless whole number which is indirectly related to the physical
size, in millimetres, of the bore or outside diameter of the end connections
NOTE Adapted from ISO 6708:—, definition 2.1.
3.2
nominal pressure
PN
numerical designation relating to pressure which is a convenient rounded number for reference purposes, and
which comprises the letters PN followed by the appropriate reference number
NOTE 1 It is intended that all equipment of the same nominal size (DN) designated by the same PN number have
compatible mating dimensions.
© ISO 2010 – All rights reserved 1
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SIST EN ISO 10497:2011
ISO 10497:2010(E)
NOTE 2 The maximum allowable pressure depends on materials, design and working temperatures, and is selected
from the tables of pressure/temperature ratings given in the appropriate standards.
NOTE 3 Adapted from ISO 7268:—, Clause 2.1.
3.3
NPS
alphanumeric designation of size for components of a pipework system, which is used for reference purposes,
and which comprises the letters NPS followed by a dimensionless number indirectly related to the physical
size of the bore or outside diameter of the end connections
NOTE The number following the letters NPS does not represent a measurable value and is not intended to be used
for calculation purposes except where specified in the relevant standard.
3.4
class
alphanumeric designation used for reference purposes related to a combination of mechanical and
dimensional characteristics of a component of a pipework system, which comprises the word “Class” followed
by a dimensionless whole number
NOTE The number following the word “Class” does not represent a measurable value and is not intended to be used
for calculation purposes except where specified in the relevant standard.
3.5
symmetric seated valve
valve with an internal construction, which has a plane of symmetry perpendicular to the axis of the body ends
NOTE This is a valve where both seat and sealing elements are identical.
3.6
asymmetric seated valve
valve with an internal construction, which has no plane of symmetry perpendicular to the axis of the body ends
NOTE This is a valve with a single seat offset from the shaft centreline.
3.7
soft seat
soft seal
seat or sealing element made from, or including, a significant amount of thermoplastic or elastomeric material
4 Test conditions
4.1 Direction and conditions for valves to be tested
4.1.1 Symmetric seated valves intended by the manufacturer for bi-directional installation shall be tested in
one direction only.
4.1.2 Asymmetric seated valves intended by the manufacturer for bi-directional installation shall be tested
by carrying out the burn test procedure twice, once in each direction of the potential installation.
The same valve may be refurbished and re-tested, or another, identical, valve may be tested in the other
direction.
4.1.3 Valves intended solely for unidirectional installation shall be clearly and permanently marked as such,
and shall be tested in the stated direction of installation.
2 © ISO 2010 – All rights reserved
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SIST EN ISO 10497:2011
ISO 10497:2010(E)
4.1.4 If the valve being tested is fitted with a gearbox or other such manual device, only that particular
assembly shall qualify. If a valve can be supplied with or without a gearbox, testing with a gearbox fitted shall
qualify valves without a gearbox, but not the converse.
4.1.5 Valves (and gearboxes) shall not be protected with insulation material of any form during testing,
except where such protection is part of the design of the component(s).
4.2 Pressure relief provision
If the valve under test incorporates a pressure relief device as part of its standard design and if this device
activates during the fire test, the test shall be continued and any leakage to atmosphere from the device shall
be measured and counted as external leakage. If the design is such that the device vents to the downstream
side of the valve, any leakage shall be counted as through-seat leakage (see 5.6.11 and 5.6.13).
However, the test shall be stopped if the system pressure relief device described in 5.3.2.8 activates.
5 Fire test method
5.1 General warning
Fire testing of valves is potentially hazardous and it is essential that the safety of personnel be given prime
consideration. Given the nature of the fire test and the possibility of weaknesses in the design of the test valve
and test equipment, hazardous rupture of the pressure boundary could occur. Adequate shields in the area of
the test enclosure and other appropriate means for the protection of personnel are necessary.
5.2 Principle
A closed valve, completely filled with water under pressure, is completely enveloped in flames with an
environmental temperature in the region of the valve of 750 °C to 1 000 °C for a period of 30 min. The
objective is to completely envelop the valve in flames to assure that the seat and sealing areas are exposed to
the high burn temperature. The intensity of the heat input shall be monitored using thermocouples and
calorimeter cubes as specified in 5.6.7 and 5.6.8. During this period the internal and external leakage is
recorded. After cool-down from the fire test, the valve is hydrostatically tested to assess the pressure-
containing capability of the valve shell, seats and seals.
5.3 Apparatus
5.3.1 General
The test equipment shall not subject the valve to externally applied stress affecting the results of the test.
Schematic diagrams of recommended systems for fire type-testing of valves are given in Figure 1.
Potential pipework-to-valve end connection joint leakage is not evaluated as part of the test and is not
included in the allowable external leakage (see 6.3 and 6.6). For the purposes of this test, it may be necessary
to modify these joints to eliminate leakage.
The test equipment shall be designed such that if the nominal diameter of the pipework situated immediately
upstream of the test valve is larger than DN 25 or one-half the DN of the test valve, the pipework shall be
enveloped in flames for a minimum distance of 150 mm from the test valve. The diameter of the upstream
pipework shall be sufficient to deliver a flow rate in excess of the maximum allowable leak rate for the size of
the valve being tested.
The pipework downstream of the test valve shall be at least DN 15 and shall be inclined such that the
downstream side is fully drained.
© ISO 2010 – All rights reserved 3
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SIST EN ISO 10497:2011
ISO 10497:2010(E)
The flame source shall be at least 150 mm minimum away from the valve or any calorimeters, and should
have sufficient capacity to completely envelop the valve in flames.
The enclosure containing the valve shall provide a horizontal clearance of a minimum of 150 mm between any
part of the test valve and the enclosure, and the height of the enclosure above the top of the test valve shall
be a minimum of 150 mm.
5.3.2 Specific apparatus
5.3.2.1 Vapour trap, to minimize the cooling effect of the upstream liquid. See Figure 1 (7).
NOTE In 5.3.2 and 5.6, the numbered items in parentheses refer to the item numbers for the apparatus in Figure 1.
5.3.2.2 Industrial pressure measurement devices having a full-scale reading of between 1,5 and 4
times the pressure being measured. The accuracy of each test device used at any point on the scale shall be
within 3 % of its maximum scale value for readings taken both up and down the scale, with either increasing or
decreasing pressure. See Figure 1 (6, 12).
5.3.2.3 Calorimeter cubes, of carbon steel in accordance with the design and dimensions shown in
Figure 2, with a thermocouple of the accuracy specified in 5.3.2.4, located in the centre of each cube.
Calorimeter cubes shall be scale-free before exposure to the fire environment.
5.3.2.4 Flame environment and valve body thermocouples, of an accuracy at least equal to tolerance
class 2 for type B or tolerance class 3 for other types, as specified in IEC 60584-2. See Figure 1 (11).
5.3.2.5 Containers, of a size suitable for collecting the water leaked from the valve under test. See
Figure 1 (16).
5.3.2.6 Calibrated sight gauge, or device for measuring the water used during the test. See
Figure 1 (4).
5.3.2.7 Calibrated device for measuring the leakage water collected during the test.
5.3.2.8 Pressure relief provision, incorporated in the system, consisting of a pressure relief valve to
relieve the test valve centre cavity pressure to the atmosphere, to protect against potential rupture of the
valve, if it is designed such that liquid can be trapped in the cavity. See Figure 1 (12).
The pressure relief valve setting shall be
⎯ either that determined by the valve manufacturer from data obtained by hydrostatic pressure testing of
valves of the same size and type as the fire-tested valve, or
⎯ when pressure test data are not available, a setting not greater than 1,5 times the maximum allowable
pressure at 20 °C.
5.4 Test fluid
The test fluid used shall be water.
5.5 Test fuel
The test fuel shall be gaseous.
5.6 Procedure
NOTE The numbered items in parentheses refer to the item numbers for the apparatus in Figure 1.
4 © ISO 2010 – All rights reserved
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SIST EN ISO 10497:2011
ISO 10497:2010(E)
5.6.1 Mount the test valve in the test apparatus such that the stem and bore of the valve are in the
horizontal position. Mount a valve that operates in only one direction (unidirectional) in their normal operating
position.
Locate the flame environment, body thermocouples and calorimeter cubes in the positions shown in Figures 3
and 4, as appropriate.
For soft-seated valves up to DN 100 or NPS 4 and pressure ratings up to PN 40, Class 300, use two flame
environment thermocouples, two body thermocouples and two calorimeter cubes as shown in Figure 3.
For all other valves, use two flame environment thermocouples and two calorimeter cubes as shown in
Figure 4. For valves DN 200 or NPS 8 and larger, use a third calorimeter cube as shown in Figure 4.
5.6.2 With the test valve in the partially open position, open the water supply valve, the shut-off valve (5),
the vent valves (14) and the shut-off valve (13) to flood the system and purge the air. When the system is
completely filled with water, close the shut-off valve (13), the vent valves (14) and the water supply valve.
Pressurize the system with water to a test pressure of 1,4 times the maximum allowable pressure at 20 °C;
1)
the actual test pressure may be rounded up to the next highest bar . Check for leaks in the test apparatus
and eliminate as necessary. Release the pressure, close the test valve and open the shut-off valve (13).
5.6.3 If the valve under test is of the upstream sealing type, determine the volume of water that is trapped
between the upstream seat seal and the downstream seat seal when the valve is closed. Record this volume.
It is assumed that, during the fire type-test, this volume of water would flow through the valve and pass the
downstream seat seal to be collected in the container (16). Since this volume has not actually leaked through
the upstream seat seal, it is deducted from the total volume collected in the downstream container when
determining the through-seat leakage (see 5.6.11).
5.6.4 Pressurize the system to one or the other of the following pressures, as appropriate:
a) for soft-seated valves rated PN 10, PN 16, PN 25 and PN 40, Class 150 and Class 300, the low test
pressure at 0,2 MPa (2 bar);
b) for all other valves, the high test pressure at 75 % of the maximum allowable seat pressure at 20 °C.
Tolerance on all test pressures is ± 10 %.
Maintain this test pressure during the burn and cool-down periods, momentary pressure losses of up to 50 %
of the test pressure being permitted provided that the pressure recovers within 2 min and the cumulative
duration is less than 2 min.
5.6.5 Record the reading on the calibrated sight gauge or device (4). Empty the container (16).
5.6.6 Adjust the test system, excluding the test valve, during the test period to maintain the temperatures
and pressures required.
5.6.7 Open the fuel supply, establish a fire and monitor the flame environment temperature throughout the
+5
burn period of 30 min. Check that the average temperature of the two flame environment thermocouples
0
(11) reaches 750 °C within 2 min from the start of the burn period, i.e. from ignition of the burners. Maintain
the average temperature between 750 °C and 1 000 °C, with no reading less than 700 °C for the remainder of
the burn period of 30 min.
5 2
1) 1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm .
© ISO 2010 – All rights reserved 5
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SIST EN ISO 10497:2011
ISO 10497:2010(E)
Dimensions in millimetres
a) Pump as pressure source
Figure 1 — Recommended systems (continued)
6 © ISO 2010 – All
...
SLOVENSKI STANDARD
oSIST prEN ISO 10497:2008
01-september-2008
Preskušanje ventilov - Zahteve za protipožarno preskušanje (ISO/DIS 10497:2008)
Testing of valves - Fire type-testing requirements (ISO/DIS 10497:2008)
Prüfung von Armaturen - Anforderungen an die Typprüfung auf Feuersicherheit (ISO/DIS
10497:2008)
Essais des appareils de robinetterie - Exigences de l'essai au feu (ISO/DIS 10497:2008)
Ta slovenski standard je istoveten z: prEN ISO 10497
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
23.060.01 Ventili na splošno Valves in general
oSIST prEN ISO 10497:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 10497:2008
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oSIST prEN ISO 10497:2008
EUROPEAN STANDARD
DRAFT
prEN ISO 10497
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2008
ICS 13.220.40; 23.060.01 Will supersede EN ISO 10497:2004
English Version
Testing of valves - Fire type-testing requirements (ISO/DIS
10497:2008)
Essais des appareils de robinetterie - Exigences de l'essai
au feu (ISO/DIS 10497:2008)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 69.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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.
: This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
Warning
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 10497:2008: E
worldwide for CEN national Members.
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oSIST prEN ISO 10497:2008
prEN ISO 10497:2008 (E)
Contents Page
Foreword.3
2
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oSIST prEN ISO 10497:2008
prEN ISO 10497:2008 (E)
Foreword
This document (prEN ISO 10497:2008) has been prepared by Technical Committee ISO/TC 153 "Valves" in
collaboration with Technical Committee CEN/TC 69 “Industrial valves” the secretariat of which is held by
AFNOR.
This document is currently submitted to the parallel Enquiry.
This document will supersede EN ISO 10497:2004.
Endorsement notice
The text of ISO/DIS 10497:2008 has been approved by CEN as a prEN ISO 10497:2008 without any
modification.
3
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oSIST prEN ISO 10497:2008
DRAFT INTERNATIONAL STANDARD ISO/DIS 10497
ISO/TC 153/SC 1 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2008-04-10 2008-09-10
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Testing of valves — Fire type-testing requirements
Essais des appareils de robinetterie — Exigences de l'essai au feu
[Revision of second edition (ISO 10497:2004)]
ICS 23.060.01
ISO/CEN PARALLEL ENQUIRY
The CEN Secretary-General has advised the ISO Secretary-General that this ISO/DIS covers a subject
of interest to European standardization. In accordance with the ISO-lead mode of collaboration as
defined in the Vienna Agreement, consultation on this ISO/DIS has the same effect for CEN
members as would a CEN enquiry on a draft European Standard. Should this draft be accepted, a
final draft, established on the basis of comments received, will be submitted to a parallel two-month FDIS
vote in ISO and formal vote in CEN.
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED 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 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 NATIONAL REGULATIONS.
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.
©
International Organization for Standardization, 2008
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ISO/DIS 10497
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Contents Page
Foreword.iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Test conditions.2
4.1 Direction and conditions for valves to be tested .2
4.2 Pressure relief provision.3
5 Fire test method.3
5.1 General warning.3
5.2 Principle.3
5.3 Apparatus.3
5.4 Test fluid.4
5.5 Test fuel.4
5.6 Procedure.4
6 Performance.11
6.1 General.11
6.2 Through-seat leakage during burn period .11
6.3 External leakage during burn and cool-down periods.11
6.4 Low pressure test through-seat leakage after cool-down.12
6.5 Operability.12
6.6 External leakage following operational test.12
6.7 Test report.13
7 Qualification of other valves by representative size, pressure rating and materials of
construction .14
7.1 General.14
7.2 Materials of construction .14
7.3 Qualification of valves by nominal size.15
7.4 Qualification of valves by pressure rating .15
7.5 Special marking.16
Bibliography.17
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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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 10497 was prepared by Technical Committee ISO/TC 153, Valves, Subcommittee SC 1, and by
Technical Committee CEN/TC 69, Industrial valves in collaboration.
This third edition cancels and replaces the second edition (ISO 10497:2004) which has been technically
revised.
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Introduction
This International Standard covers the requirements and method for evaluating the performance of valves
when they are exposed to defined fire conditions. The performance requirements establish limits of
acceptability of a valve, regardless of size or pressure rating. The burn period has been established to
represent the maximum time required to extinguish most fires. Fires of longer duration are considered to be of
major magnitude with consequences greater than those anticipated in the test.
The test pressure during the burn is set at 0,2 MPa (2 bar) for soft-seated valves rated PN 16, PN 25 and
PN 40, Class 150 and Class 300, to better simulate the conditions that would be expected in a process plant
when a fire is detected and pumps are shut down. In this case, the source of pressure in the system is the
hydrostatic head resulting from liquid levels in towers and vessels. This situation is approximated by this lower
test pressure.
In production facilities, valves are typically of a higher rating and the pressure source is not easily reduced
when a fire is detected. Therefore, for all other valves, the test pressure during the burn is set at a higher
value to better simulate the expected service conditions in these facilities.
Use of this International Standard assumes that the execution of its provisions is entrusted to appropriately
qualified and experienced personnel, because it calls for procedures that may be injurious to health if
adequate precautions are not taken. This International Standard refers only to technical suitability and does
not absolve the user from legal obligations relating to health and safety at any stage of the procedure.
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oSIST prEN ISO 10497:2008
DRAFT INTERNATIONAL STANDARD ISO/DIS 10497
Testing of valves — Fire type-testing requirements
1 Scope
This International Standard specifies fire type-testing requirements and a fire type-test method for confirming
the pressure-containing capability of a valve under pressure during and after the fire test. It does not cover the
testing requirements for valve actuators other than manually operated gear boxes or similar mechanisms
when these form part of the normal valve assembly. Other types of valve actuators (e.g. electrical, pneumatic
or hydraulic) may need special protection to operate in the environment considered in this valve test, and the
fire testing of such actuators is outside the scope of this International Standard.
NOTE For the purposes of this International Standard, the terms “fire type-test” and “fire test” are synonymous.
2 Normative references
The following referenced documents are indispensable for the application 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 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
IEC 60584-2, Thermocouples — Part 2: Tolerances
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
nominal size
DN
alphanumeric designation of size for components of a pipework system, which is used for reference purposes,
comprising the letters DN followed by a dimensionless whole number which is indirectly related to the physical
size, in millimetres, of the bore or outside diameter of the end connections
[ISO 6708:1995, definition 2.1]
3.2
nominal pressure
PN
numerical designation relating to pressure which is a convenient rounded number for reference purposes, and
which comprises the letters PN followed by the appropriate reference number
NOTE 1 It is intended that all equipment of the same nominal size (DN) designated by the same PN number have
compatible mating dimensions.
NOTE 2 The maximum allowable working pressure depends on materials, design and working temperatures, and is to
be selected from the tables of pressure/temperature ratings given in the appropriate standards.
NOTE 3 Adapted from ISO 7268:1983, Clause 2.
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3.3
NPS
alphanumeric designation of size for components of a pipework system, which is used for reference purposes,
and which comprises the letters NPS followed by a dimensionless number indirectly related to the physical
size of the bore or outside diameter of the end connections
NOTE The number following the letters NPS does not represent a measurable value and is not intended to be used
for calculation purposes except where specified in the relevant standard.
3.4
Class
alphanumeric designation used for reference purposes related to a combination of mechanical and
dimensional characteristics of a component of a pipework system, which comprises the word “Class” followed
by a dimensionless whole number
NOTE The number following the word Class does not represent a measurable value and is not intended to be used
for calculation purposes except where specified in the relevant standard.
3.5
symmetric seated valve
valve with an internal construction which has a plane of symmetry perpendicular to the axis of the body ends
NOTE This is a valve where both seat sealing elements are identical.
3.6
asymmetric seated valve
valve with an internal construction which has no plane of symmetry perpendicular to the axis of the body ends
NOTE This is a valve with a single seat offset from the shaft centreline.
4 Test conditions
4.1 Direction and conditions for valves to be tested
4.1.1 Symmetric seated valves intended by the manufacturer for bi-directional installation shall be tested in
one direction only.
4.1.2 Asymmetric seated valves intended by the manufacturer for bi-directional installation shall be tested
by carrying out the burn test procedure twice, once in each direction of the potential installation.
The same valve may be refurbished and re-tested, or another, identical, valve may be tested in the other
direction.
4.1.3 Valves intended solely for unidirectional installation shall be clearly and permanently marked as such
and shall be tested in the stated direction of installation.
4.1.4 If the valve being tested is fitted with a gearbox or other such manual device, then only that particular
assembly shall qualify. If a valve can be supplied with or without a gearbox, testing with a gearbox fitted shall
qualify valves without a gearbox but not the converse.
4.1.5 Valves (and gearboxes) shall not be protected with insulation material of any form during testing,
except where such protection is part of the design of the component(s).
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4.2 Pressure relief provision
If the valve under test incorporates a pressure relief device as part of its standard design and if this device
activates during the fire test, then the test shall be continued and any leakage to atmosphere from the device
shall be measured and counted as external leakage. If the design is such that the device vents to the
downstream side of the valve, then any leakage shall be counted as through-seat leakage (see 5.6.11 and
5.6.13).
However, the test shall be stopped if the system pressure relief device described in 5.3.2.8 activates.
5 Fire test method
5.1 General warning
Fire testing of valves is potentially hazardous and it is essential that the safety of personnel be given prime
consideration. Given the nature of the fire test and the possibility of weaknesses in the design of the test valve
and test equipment, hazardous rupture of the pressure boundary could occur. Adequate shields in the area of
the test enclosure and other appropriate means for the protection of personnel are necessary.
5.2 Principle
A closed valve completely filled with water under pressure is completely enveloped in flames with an
environmental temperature in the region of the valve of 750 °C to 1 000 °C for a period of 30 min. The
objective is to completely envelop the valve in flames to assure that the seat and sealing areas are exposed to
the high burn temperature. The intensity of the heat input shall be monitored using thermocouples and
calorimeter cubes as specified in 5.6.7 and 5.6.8. During this period the internal and external leakage is
recorded. After cool-down from the fire test, the valve is hydrostatically tested to assess the pressure-
containing capability of the valve shell, seats and seals.
5.3 Apparatus
5.3.1 General
The test equipment shall not subject the valve to externally applied stress affecting the results of the test.
Schematic diagrams of recommended systems for fire type-testing of valves are given in Figure 1.
Potential pipework-to-valve end connection joint leakage is not evaluated as part of the test and is not
included in the allowable external leakage (see 6.3 and 6.6). For the purposes of this test, it may be necessary
to modify these joints to eliminate leakage.
The test equipment shall be designed so that if the nominal diameter of the pipework situated immediately
upstream of the test valve is larger than DN 25 or one-half the DN of the test valve, the pipework shall be
enveloped in flames for a minimum distance of 150 mm from the test valve. The diameter of the upstream
pipework shall be sufficient to deliver a flow rate in excess of the maximum allowable leak rate for the size of
valve being tested.
The pipework downstream of the test valve shall be at least DN 15 and shall be inclined so that the
downstream side is fully drained.
The flame source shall be at least 150 mm minimum away from the valve or any calorimeters, and should
have sufficient capacity to completely envelop the valve in flames.
The enclosure containing the valve shall provide a horizontal clearance of a minimum of 150 mm between any
part of the test valve and the enclosure, and the height of the enclosure above the top of the test valve shall
be a minimum of 150 mm.
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5.3.2 Specific apparatus
5.3.2.1 Vapour trap to minimise the cooling effect of the upstream liquid. See Figure 1, (8).
5.3.2.2 Industrial pressure measurement devices having a full-scale reading of between 1,5 and 4
times the pressure being measured. The accuracy of each test device used at any point on the scale shall be
within 3 % of its maximum scale value for readings taken both up and down the scale with either increasing or
decreasing pressure. See Figure 1, (7), (14).
5.3.2.3 Calorimeter cubes made of carbon steel in accordance with the design and dimensions shown
in Figure 2, with a thermocouple of the accuracy specified in 5.3.2.4, located in the centre of each cube.
Calorimeter cubes shall be scale-free before exposure to the fire environment.
5.3.2.4 Flame environment and valve body thermocouples of an accuracy at least equal to tolerance
class 2 for type B or tolerance class 3 for other types as specified in IEC 60584-2. See Figure 1, (13).
5.3.2.5 Containers of a size suitable for collecting the water leaked from the valve under test. See
Figure 1, (18).
5.3.2.6 Calibrated sight gauge or device for measuring the water used during the test. See Figure 1,
(4).
5.3.2.7 Calibrated device for measuring the leakage water collected during the test.
5.3.2.8 Pressure relief provision, incorporated in the system, consisting of a pressure relief valve to
relieve the test valve centre cavity pressure to the atmosphere, to protect against potential rupture of the valve
if it is designed such that liquid can be trapped in the cavity. See Figure 1, (14).
The pressure relief valve setting shall be
either that determined by the valve manufacturer from data obtained by hydrostatic pressure testing of
valves of the same size and type as the fire-tested valve, or
when pressure test data is not available, a setting not greater than 1,5 times the maximum permissible
working pressure at 20 °C.
5.4 Test fluid
The test fluid used shall be water.
5.5 Test fuel
The test fuel shall be gaseous.
5.6 Procedure
NOTE The numbered items in parentheses refer to the apparatus of Figure 1.
5.6.1 Mount the test valve in the test apparatus so that the stem and bore of the valve are in the horizontal
position. Mount a valve that operates in only one direction (unidirectional) in their normal operating position.
Locate the flame environment, body thermocouples and calorimeter cubes in the positions shown in Figures 3
and 4, as appropriate.
For soft-seated valves up to DN 100 or NPS 4 and pressure ratings up to PN 40, Class 300, use two flame
environment thermocouples, two body thermocouples and calorimeter cubes as shown in Figure 3.
For all other valves, use two flame environment thermocouples and two calorimeter cubes as shown in
Figure 4. For valves DN 200 or NPS 8 and larger, use a third calorimeter cubes as shown in Figure 4.
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5.6.2 With the test valve in the partially open position, open the water supply valve (5), the shut-off
valve (6), the vent valves (16) and the shut-off valve (15) to flood the system and purge the air. When the
system is completely filled with water, close the shut-off valve (15), the vent valves (16) and the water supply
valve (5). Pressurize the system with water to a test pressure of 1,4 times the maximum permissible working
1)
pressure at 20 °C — the actual test pressure may be rounded up to the next highest bar . Check for leaks in
the test apparatus and eliminate as necessary. Release the pressure, close the test valve and open the shut-
off valve (15).
5.6.3 If the valve under test is of the upstream sealing type, determine the volume of water that is trapped
between the upstream seat seal and the downstream seat seal when the valve is closed. Record this volume.
It is assumed that, during the fire type-test, this volume of water will flow through the valve and pass the
downstream seat seal to be collected in the container (18). Since this volume has not actually leaked through
the upstream seat seal, it is deducted from the total volume collected in the downstream container when
determining the through-seat leakage (see 5.6.11).
5.6.4 Pressurize the system to one or the other of the following pressures, as appropriate:
a) for soft-seated valves rated PN 10, PN 16, PN 25 and PN 40, Class 150 and Class 300, the low test
pressure at 0,2 MPa (2 bar);
b) for all other valves, the high test pressure at 75 % of the maximum permissible seat working pressure at
20 °C.
Tolerance on all test pressures is ± 10 %.
Maintain this test pressure during the burn and cool-down periods, momentary pressure losses of up to 50 %
of the test pressure being permitted provided that the pressure recovers with
...
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