EN ISO 10497:2010

SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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.

Contents Page
Foreword .3

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.

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
ISO 10497:2010(E)
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ii © ISO 2010 – All rights reserved

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 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

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.

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 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

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 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 o
...