EN ISO 10497-2010 阀门试验 阀门耐火试验要求

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1、 EUROPEAN STANDARD NORME EUROP ENNE EUROP ISCHE NORM EN ISO 10497 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 au feu ISO 10497 2010 Pr fung von Armat

2、uren Anforderungen an die Typpr fung 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 st

3、andard 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 lang

4、uage 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 Finla

5、nd 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 EUROP EN DE NORMALISATION EUROP ISCHES KOMITEE F R NORMUNG Ma

6、nagement 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 E EN ISO 10497 2010 E 3 Foreword This document EN ISO 10497 2010 has been prepared by Technical Committee ISO TC 153

7、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 nat

8、ional standards shall be withdrawn at the latest by August 2010 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN and or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

9、 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 Irel

10、and 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 Al

11、l 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 Appara

12、tus 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 follow

13、ing 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 Spec

14、ial 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 t

15、echnical 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 wi

16、th 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 Internatio

17、nal 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 s

18、ubject 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 w

19、hich 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 acc

20、eptability 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 pres

21、sure 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

22、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

23、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 pro

24、cedures 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

25、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 ap

26、plicable 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 cons

27、idered 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 F

28、or 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

29、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 followin

30、g 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 o

31、r 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

32、 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

33、 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

34、 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 designat

35、ion 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

36、 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 identica

37、l 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 am

38、ount 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 manufac

39、turer 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 un

40、idirectional 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 sha

41、ll 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

42、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 count

43、ed 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

44、 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 bo

45、undary 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 o

46、f 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 specifi

47、ed 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 subje

48、ct 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 allowab

49、le 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 th

50、e 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 down