1、Safety devices for protectionagainst excessive pressurePart 7: Common dataBS EN ISO 4126-7:2013+A1:2016(ISO 4126-7:2013)BSI Standards PublicationBS EN ISO 4126-7:2013+A1:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 4126-7:2013+A1:2016. It supersedes
2、BS EN ISO 4126-7:2013 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to ISO text carry the number of the ISO amendment. For example, text altered by ISO amendment 1 is indicated by g1g2.The UK participation
3、 in its preparation was entrusted by Technical Committee PSE/18, Industrial valves, steam traps, actuators and safety devices against excessive pressure, to Subcommittee PSE/18/6, Industrial valves, steam traps, actuators and safety devices against excessive pressure - Safety devices against excessi
4、ve pressure.A list of organizations represented on this subcommittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Publish
5、ed by BSI Standards Limited 2016ISBN 978 0 580 92388 3ICS 13.240Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2013.Amendments/corrigenda issued since p
6、ublicationDate Text affected31 July 2016 Implementation of ISO amendment 1:2016 with CEN endorsement A1:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4126-7 July 2013 ICS 13.240 Supersedes EN ISO 4126-7:2004English Version Safety devices for protection against excessive pressure - Par
7、t 7: Common data (ISO 4126-7:2013) Dispositifs de scurit pour protection contre les pressions excessives - Partie 7: Donnes communes (ISO 4126-7:2013) Sicherheitseinrichtungen gegen unzulssigen berdruck - Teil 7: Allgemeine Daten (ISO 4126-7:2013) This European Standard was approved by CEN on 25 Apr
8、il 2013. 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 obta
9、ined on application to the CEN-CENELEC 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 CE
10、N-CENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland
11、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Mar
12、nix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4126-7:2013: EEN ISO 4126-7:2013+A1June 2016ForewordThis document (EN ISO 4126-7:2013) has been prepared by Technical Committee ISO/TC 185 “Safety dev
13、ices for protection against excessive pressure“ in collaboration with the 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,
14、 at the latest by January 2014, and conflicting national standards shall be withdrawn at the latest by January 2014.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 a
15、ny or all such patent rights.This document supersedes EN ISO 4126-7:2004.This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive.For relationship with EU Directive, see inform
16、ative Annex ZA, which is an integral part of this document.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,
17、Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of
18、 ISO 4126-7:2013 has been approved by CEN as EN ISO 4126-7:2013 without any modification.iiBS EN ISO 4126-7:2013+A1:2016g8g17g3g12g22g18g3g886g883g884g888g487g889g483g884g882g883g885g938g4g883g483g884g882g883g888g3g525g8g526iiiBS EN ISO 4126-7:2013+A1:2016g8g17g3g12g22g18g3g886g883g884g888g487g889g4
19、83g884g882g883g885g938g4g883g483g884g882g883g888g3g525g8g526g9g145g148g135g153g145g148g134g3g150g145g3g131g143g135g144g134g143g135g144g150g3g4g883This document (EN ISO 4126-7:2013/A1:2016) has been prepared by Technical Committee ISO/TC 185 “Safety devices for protection against excessive pressure“
20、in collaboration with Technical Committee CEN/TC 69 “Industrial valves” the secretariat of which is held by AFNOR. This Amendment to the European Standard EN ISO 4126-7:2013 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest
21、by December 2016, and conflicting national standards shall be withdrawn at the latest by December 2016. 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 su
22、ch patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive, see informative Annex ZA, which is an integral part of EN ISO
23、 4126-7:2013. 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, Former Yugoslav Republic of Macedoni
24、a, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4126-7:2013/Amd 1:2016 has been approv
25、ed by CEN as EN ISO 4126-7:2013/A1:2016 without any modification. 4Annex ZA(informative)Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC (PED)This European Standard has been prepared under a mandate given to CEN by the European Commission and the Eu
26、ropean Free Trade Association to provide one means of conforming to Essential Requirements of the New Approach Directive 97/23/EC (PED).Once EN ISO 4126-7 is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one
27、 Member State, compliance with the normative clauses of EN ISO 4126-7 confers, within the limits of the scope of EN ISO 4126-7, a presumption of conformity with the corresponding Essential Requirements of that Directive and associated EFTA regulations.Table ZA.1 Correspondence between this European
28、Standard and Directive 97/23/EC (PED)Sub-clauses of this ENEssential Requirements of Directive 97/23/EC (PED)Essential Requirements Annex I of PED5 and 6 Pressure Limitations 2.11.1WARNING Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of EN I
29、SO 4126-7.ivBS EN ISO 4126-7:2013+A1:2016g8g17g3g12g22g18g3g886g883g884g888g487g889g483g884g882g883g885g938g4g883g483g884g882g883g888g3g525g8g526BS EN ISO 4126-7:2013ISO 4126-7:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 1g885g3 g23g135g148g143g1
30、49g3g131g144g134g3g134g135g976g139g144g139g150g139g145g144g149 . 14 Symbols and units . 35 Determination of safety valve performance 4g887g484g883g3 g7g135g150g135g148g143g139g144g131g150g139g145g144g3g145g136g3g133g145g135g136g976g139g133g139g135g144g150g3g145g136g3g134g139g149g133g138g131g148g137g
31、135 . 4g887g484g884g3 g6g148g139g150g139g133g131g142g3g131g144g134g3g149g151g132g133g148g139g150g139g133g131g142g3g976g142g145g153 . 4g887g484g885g3 g7g139g149g133g138g131g148g137g135g3g133g131g146g131g133g139g150g155g3g131g150g3g133g148g139g150g139g133g131g142g3g976g142g145g153 . 4g887g484g886g3 g7
32、g139g149g133g138g131g148g137g135g3g133g131g146g131g133g139g150g155g3g136g145g148g3g131g144g155g3g137g131g149g3g131g150g3g149g151g132g133g148g139g150g139g133g131g142g3g976g142g145g153 5g887g484g887g3 g7g139g149g133g138g131g148g137g135g3g133g131g146g131g133g139g150g155g3g136g145g148g3g144g145g144g486g
33、976g142g131g149g138g139g144g137g3g142g139g147g151g139g134g3g131g149g3g150g138g135g3g150g135g149g150g3g143g135g134g139g151g143g3g139g144g3g150g138g135g3g150g151g148g132g151g142g135g144g150g3g156g145g144g135g3g153g138g135g148g135g3g150g138g135g3g21g135g155g144g145g142g134g149g3g144g151g143g132g135g148
34、g3Re is equal to or greater than 80 000 56 Sizing of safety valves 6g888g484g883g3 g10g135g144g135g148g131g142 . 66.2 Valves for gas or vapour relief . 6g888g484g885g3 g6g131g142g133g151g142g131g150g139g145g144g3g145g136g3g133g131g146g131g133g139g150g155 67 Thermodynamic properties . 87.1 Steam data
35、. 87.2 Value of C as a function of k 8g889g484g885g3 g23g138g135g145g148g135g150g139g133g131g142g3g133g131g146g131g133g139g150g155g3g133g145g148g148g135g133g150g139g145g144g3g136g131g133g150g145g148g149g3g136g145g148g3g149g151g132g486g133g148g139g150g139g133g131g142g3g976g142g145g153g3g523Kb) . 8g88
36、9g484g886g3 g8g149g150g139g143g131g150g139g144g137g3g133g138g131g148g150g3g136g145g148g3g133g145g143g146g148g135g149g149g139g132g139g142g139g150g155g3g136g131g133g150g145g148g481g3Z .19g889g484g887g3 g6g131g146g131g133g139g150g155g3g133g145g148g148g135g133g150g139g145g144g3g136g131g133g150g145g148g3
37、g136g145g148g3g152g139g149g133g145g149g139g150g155g481g3g14v.217.6 Properties of gases 228 Minimum requirements for helical compression springs 23g890g484g883g3 g10g135g144g135g148g131g142 238.2 Materials 238.3 Marking 238.4 Dimensions 248.5 Spring plates/buttons 24g890g484g888g3 g12g144g149g146g135
38、g133g150g139g145g144g481g3g150g135g149g150g139g144g137g3g131g144g134g3g150g145g142g135g148g131g144g133g135g149 249 Minimum requirements for safety valve disc springs 27g891g484g883g3 g10g135g144g135g148g131g142 279.2 Materials 279.3 Marking 279.4 Dimensions 27g891g484g887g3 g12g144g149g146g135g133g1
39、50g139g145g144g481g3g150g135g149g150g139g144g137g3g131g144g134g3g150g145g142g135g148g131g144g133g135g149 27Annex A (informative) Examples of capacity calculations for various media 28Bibliography .33BS EN ISO 4126-7:2013+A1:2016g12g22g18g3g886g883g884g888g487g889g483g884g882g883g885g938g4g883g483g88
40、4g882g883g888g525g8g526v ISO 2013 All rights r edviBS EN ISO 4126-7:2013ISO 4126-7:2013(E)Forewordg12g22g18g3g523g150g138g135g3g12g144g150g135g148g144g131g150g139g145g144g131g142g3g18g148g137g131g144g139g156g131g150g139g145g144g3g136g145g148g3g22g150g131g144g134g131g148g134g139g156g131g150g139g145g1
41、44g524g3g139g149g3g131g3g153g145g148g142g134g153g139g134g135g3g136g135g134g135g148g131g150g139g145g144g3g145g136g3g144g131g150g139g145g144g131g142g3g149g150g131g144g134g131g148g134g149g3g132g145g134g139g135g149g3g523g12g22g18g3g143g135g143g132g135g148g3g132g145g134g139g135g149g524g484g3g23g138g135g3
42、g153g145g148g141g3g145g136g3g146g148g135g146g131g148g139g144g137g3g12g144g150g135g148g144g131g150g139g145g144g131g142g3g22g150g131g144g134g131g148g134g149g3g139g149g3g144g145g148g143g131g142g142g155g3g133g131g148g148g139g135g134g3g145g151g150g3g150g138g148g145g151g137g138g3 g12g22g18g3 g150g135g133g
43、138g144g139g133g131g142g3 g133g145g143g143g139g150g150g135g135g149g484g3 g8g131g133g138g3 g143g135g143g132g135g148g3 g132g145g134g155g3 g139g144g150g135g148g135g149g150g135g134g3 g139g144g3 g131g3 g149g151g132g140g135g133g150g3 g136g145g148g3 g153g138g139g133g138g3 g131g3 g150g135g133g138g144g139g13
44、3g131g142g3committee has been established has the right to be represented on that committee. International g145g148g137g131g144g139g156g131g150g139g145g144g149g481g3 g137g145g152g135g148g144g143g135g144g150g131g142g3 g131g144g134g3 g144g145g144g486g137g145g152g135g148g144g143g135g144g150g131g142g481
45、g3 g139g144g3 g142g139g131g139g149g145g144g3 g153g139g150g138g3 g12g22g18g481g3 g131g142g149g145g3 g150g131g141g135g3 g146g131g148g150g3 g139g144g3 g150g138g135g3 g153g145g148g141g484g3g12g22g18g3 g133g145g142g142g131g132g145g148g131g150g135g149g3 g133g142g145g149g135g142g155g3 g153g139g150g138g3 g1
46、50g138g135g3 g12g144g150g135g148g144g131g150g139g145g144g131g142g3 g8g142g135g133g150g148g145g150g135g133g138g144g139g133g131g142g3 g6g145g143g143g139g149g149g139g145g144g3 g523g12g8g6g524g3 g145g144g3 g131g142g142g3 g143g131g150g150g135g148g149g3 g145g136g3g135g142g135g133g150g148g145g150g135g133g1
47、38g144g139g133g131g142g3g149g150g131g144g134g131g148g134g139g156g131g150g139g145g144g484g12g144g150g135g148g144g131g150g139g145g144g131g142g3g22g150g131g144g134g131g148g134g149g3g131g148g135g3g134g148g131g136g150g135g134g3g139g144g3g131g133g133g145g148g134g131g144g133g135g3g153g139g150g138g3g150g138
48、g135g3g148g151g142g135g149g3g137g139g152g135g144g3g139g144g3g150g138g135g3g12g22g18g512g12g8g6g3g7g139g148g135g133g150g139g152g135g149g481g3g19g131g148g150g3g884g484The main task of technical committees is to prepare International Standards. Draft International g22g150g131g144g134g131g148g134g149g3
49、g131g134g145g146g150g135g134g3 g132g155g3 g150g138g135g3 g150g135g133g138g144g139g133g131g142g3 g133g145g143g143g139g150g150g135g135g149g3 g131g148g135g3 g133g139g148g133g151g142g131g150g135g134g3 g150g145g3 g150g138g135g3 g143g135g143g132g135g148g3 g132g145g134g139g135g149g3 g136g145g148g3 g152g145g150g139g144g137g484g3g19g151g132g142g139g133g131g150g139g145g144g3 g131g149g3 g131g144g3 g12g144g150g135g148g144g131g150g139g145g144g131g142g3 g22g150g131g144g134g131g148g134g3 g148g135g147g151g139g148g135g149g3 g131g146g146g148g145g152g131g142g3 g132g155g3 g131g150g3 g1
