SIST EN ISO 10497:2004

Testing of valves - Fire type-testing requirements (ISO 10497:2004)

This standard specifies the requirements for fire testing and describes a test method for establishing the pressure-containing capabilities of a valve pressurized during and after the fire test.

Prüfung von Armaturen - Anforderungen an die Typprüfung auf Feuersicherheit (ISO 10497:2004)

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 Teil 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.
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 10497:2004)

Preskušanje ventilov - Zahteve za protipožarno preskušanje

General Information

• Status: Withdrawn
• Publication Date: 31-Oct-2004
• Withdrawal Date: 21-Sep-2011
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 23.060.01 - Valves in general
• Technical Committee: IHPV - Hydraulics and pneumatics
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 22-Sep-2011
• Due Date: 15-Oct-2011
• Completion Date: 22-Sep-2011
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: EN ISO 10497:2004 - Testing of valves - Fire type-testing requirements (ISO 10497:2004)

Relations

• Replaced By: SIST EN ISO 10497:2011 - Testing of valves - Fire type-testing requirements (ISO 10497:2010)
• Effective Date: 01-Nov-2011
• Replaced By: SIST EN ISO 10497:2011 - Testing of valves - Fire type-testing requirements (ISO 10497:2010)
• Effective Date: 08-Jun-2022
• Replaces: SIST ISO 10497:2000 - Testing of valves -- Fire type-testing requirements
• Effective Date: 01-Nov-2004

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 10497:2004
01-november-2004
Preskušanje ventilov - Zahteve za protipožarno preskušanje
Testing of valves - Fire type-testing requirements (ISO 10497:2004)
Prüfung von Armaturen - Anforderungen an die Typprüfung auf Feuersicherheit (ISO
10497:2004)
Essais des appareils de robinetterie - Exigences de l'essai au feu (ISO 10497:2004)
Ta slovenski standard je istoveten z: EN ISO 10497:2004
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 10497:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10497:2004

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SIST EN ISO 10497:2004
EUROPEAN STANDARD
EN ISO 10497
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2004
ICS 23.060.01

English version
Testing of valves - Fire type-testing requirements (ISO
10497:2004)
Essais des appareils de robinetterie - Exigences de l'essai Prüfung von Armaturen - Anforderungen an die Typprüfung
au feu (ISO 10497:2004) auf Feuersicherheit (ISO 10497:2004)
This European Standard was approved by CEN on 14 August 2004.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10497:2004: E
worldwide for CEN national Members.

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SIST EN ISO 10497:2004

EN ISO 10497:2004 (E)





Foreword


This document (EN ISO 10497:2004) 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 February 2005, and conflicting national
standards shall be withdrawn at the latest by February 2005.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.


Endorsement notice

The text of ISO 10497:2004 has been approved by CEN as EN ISO 10497:2004 without any
modifications.

2

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SIST EN ISO 10497:2004


INTERNATIONAL ISO
STANDARD 10497
Second edition
2004-08-15

Testing of valves — Fire type-testing
requirements
Essais des appareils de robinetterie — Exigences de l'essai au feu




Reference number
ISO 10497:2004(E)
©
ISO 2004

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SIST EN ISO 10497:2004
ISO 10497:2004(E)
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Published in Switzerland

ii © ISO 2004 – All rights reserved

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SIST EN ISO 10497:2004
ISO 10497:2004(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. 2
5 Fire test method . 3
5.1 General warning . 3
5.2 Principle . 3
5.3 Apparatus. 3
5.3.1 General. 3
5.3.2 Specific apparatus . 4
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. 10
6.5 Operability. 11
6.6 External leakage following operational test.11
6.7 Test report. 11
7 Qualification of other valves by representative size, pressure rating and materials of
construction . 12
7.1 General. 12
7.2 Materials of construction . 13
7.3 Qualification of valves by nominal size . 13
7.4 Qualification of valves by pressure rating . 14
7.5 Special marking. 15
Bibliography . 16

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SIST EN ISO 10497:2004
ISO 10497:2004(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 second edition cancels and replaces the first edition (ISO 10497:1992), which has been technically
revised.
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SIST EN ISO 10497:2004
ISO 10497:2004(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 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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SIST EN ISO 10497:2004

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SIST EN ISO 10497:2004
INTERNATIONAL STANDARD ISO 10497:2004(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 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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SIST EN ISO 10497:2004
ISO 10497:2004(E)
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).
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
2 © ISO 2004 – All rights reserved

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SIST EN ISO 10497:2004
ISO 10497:2004(E)
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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SIST EN ISO 10497:2004
ISO 10497:2004(E)
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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SIST EN ISO 10497:2004
ISO 10497:2004(E)
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.
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 (18).
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
(13) 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
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SIST EN ISO 10497:2004
ISO 10497:2004(E)
Dimensions in millimetres

a)  Pump as pressure source
Figure 1 — Recommended systems
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SIST EN ISO 10497:2004
ISO 10497:2004(E)
Dimensions in millimetres

b)  Compressed gas as pressure source
Key
1 pressure source
2 pressure regulator and relief
3 vessel for water
4 calibrated sight gauge
5 water supply
6 shut-off valve
7 pressure gauge
8 piping arranged to provide vapour trap (see 5.3.2)
9 enclosure for test
10 test valve mounted horizontally with stem in horizontal position (see 5.6.1)
11 fuel gas supply and burners
12 calorimeter cubes (see 5.3.2)
13 flame environment and body thermocouples (see 5.3.2)
14 pressure gauge and relief valve (see 5.3.2)
15 shut-off valve
16 vent valve
17 condenser
18 container (see 5.3.2)
19 check valve
20 slope
21 clearance: 150 mm
Figure 1 — Recommended systems (continued)
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SIST EN ISO 10497:2004
ISO 10497:2004(E)
Dimensions in millimetres

Key
...