[www.staffempire.com]-EN ISO 10497-2010 阀门试验 阀门耐火试验要求　.pdf

EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10497 February 2010 ICS 23.060.01 Supersedes EN ISO 10497:2004English Version Testing of valves-Fire type-testing requirements(ISO 10497:2010)Essais des appareils de robinetterie-Exigences de lessai au feu(ISO 10497:2010)Prfung von Armaturen-Anforderungen an die Typprfung 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 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre:Avenue Marnix 17,B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Ref.No.EN ISO 10497:2010:EEN ISO 10497:2010(E)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of an identical text or by endorsement,at the latest by August 2010,and conflicting national standards shall be withdrawn at the latest by August 2010.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.CEN and/or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.ISO 10497:2010(E)ISO 2010 All rights reserved iii 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)iv ISO 2010 All rights reserved 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.ISO 10497:2010(E)ISO 2010 All rights reserved v 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)ISO 2010 All rights reserved 1 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)2 ISO 2010 All rights reserved 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.ISO 10497:2010(E)ISO 2010 All rights reserved 3 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 downst