1、December 2016 English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 13.240!%V2“2595115www.din.deDIN
2、 EN ISO 4126-5Safety devices for protection against excessive pressure Part 5: Controlled safety pressure relief systems (CSPRS) (ISO 41265:2013 + Amd 1:2016);English version EN ISO 41265:2013 + A1:2016,English translation of DIN EN ISO 4126-5:2016-12Sicherheitseinrichtungen gegen unzulssigen berdru
3、ck Teil 5: Gesteuerte Sicherheitsventile (CSPRS) (ISO 41265:2013 + Amd 1:2016);Englische Fassung EN ISO 41265:2013 + A1:2016,Englische bersetzung von DIN EN ISO 4126-5:2016-12Dispositifs de scurit pour protection contre les pressions excessives Partie 5: Dispositifs de scurit asservis (CSPRS) (ISO 4
4、1265:2013 + Amd 1:2016);Version anglaise EN ISO 41265:2013 + A1:2016,Traduction anglaise de DIN EN ISO 4126-5:2016-12SupersedesDIN EN ISO 41265:201312www.beuth.deDocument comprises 30 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authorita
5、tive.12.16 DIN EN ISO 4126-5:2016-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 4126-5:2013 + A1:2016) has been prepared by Technical Committee ISO/TC 185 “Safety devices for protection against excessive pressure” in collaboration with Technical Committee CEN/TC
6、 69 “Industrial valves” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was DIN-Normenausschuss Armaturen (DIN Standards Committee Valves), Working Committee NA 003-01-10 AA Sicherheitseinrichtungen gegen Druckberschreitungen. Attention is drawn to the possibili
7、ty that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. Amendment A1:2016 has been incorporated in this standard and indicated in the text by tags !“. Amendments This standard diffe
8、rs from DIN EN ISO 4126-5:2013-12 as follows: a) the text in Subclause 7.2.1 “General requirements” has been revised and shortened. Previous editions DIN EN ISO 4126-5: 2004-06, 2013-12 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4126-5:2013 July 2013 + A1 June 2016 ICS 13.240 English V
9、ersion Safety devices for protection against excessive pressure Part 5: Controlled safety pressure relief systems (CSPRS)(ISO 4126-5:2013 + Amd 1:2016) Dispositifs de scurit pour protection contre les pressions excessives Partie 5: Dispositifs de scurit asservis (CSPRS) (ISO 4126-5:2013 + Amd 1:2016
10、) Sicherheitseinrichtungen gegen unzulssigen berdruck Teil 5: Gesteuerte Sicherheitsventile (ISO 4126-5:2013 + Amd 1:2016) EN ISO 4126-5:2013 was approved by CEN on 2012-12-28 and Amendment A1:2016 on 2016-05-19. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipula
11、te 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-CENELEC Management Centre or to any CEN member. This European Sta
12、ndard 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-CENELEC Management Centre has the same status as the official versions. CEN members are the na
13、tional standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Sl
14、ovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any mea
15、ns reserved worldwide for CEN national Members. Ref. No. EN ISO 4126-5:2013 + A1:2016 EEN ISO 4126-5:2013 + A1:2016 (E) 2 Contents Page Foreword to EN ISO 4126-5:2013 4 !European foreword to EN ISO 4126-5:2013/A1:2016“ 6 1 Scope 7 2 Normative references 7 3 Terms and definitions . 7 4 Symbols and un
16、its 13 5 Design . 14 5.1 General . 14 5.2 Valve end connections 16 5.3 Minimum requirements for springs 17 5.4 Materials 17 6 Production testing . 17 6.1 Purpose 17 6.2 General . 17 6.3 Hydrostatic testing 17 6.3.1 Application . 17 6.3.2 Duration 18 6.3.3 Acceptance criteria 18 6.3.4 Safety requirem
17、ents 18 6.4 Pneumatic testing 18 6.4.1 Application and duration of test . 18 6.4.2 Safety requirements 19 6.5 Adjustment of set or cold differential test pressure . 19 6.6 Seat leakage test . 19 6.7 Pressure seals 19 7 Type testing 20 7.1 General . 20 7.1.1 Application . 20 7.1.2 Tests 20 7.1.3 Obje
18、ctives of tests 20 7.1.4 Procedure for testing 21 7.1.5 Results calculated from tests . 21 7.1.6 Design changes 21 7.2 Tests to determine operating characteristics 21 7.2.1 !General Requirements“ 21 7.2.2 Test equipment . 21 7.2.3 CSPRS used in the test programme 21 7.3 Tests to determine flow chara
19、cteristics 22 7.3.1 Test requirements . 22 7.3.2 CSPRS used in the test programme 22 7.3.3 Test procedure 23 7.3.4 Adjustment during test 24 7.3.5 Records and test results 24 7.3.6 Flow test equipment 24 DIN EN ISO 4126-5:2016-12 EN ISO 4126-5:2013 + A1:2016 (E) 3 7.4 Determination of the coefficien
20、t of discharge 24 7.5 Certification of coefficient of discharge 25 7.6 Certification of CSPRS 25 8 Determination of CSPRS performance 25 9 Sizing of CSPRS . 25 10 Marking and sealing 25 10.1 Marking 25 10.1.1 Marking on the shell of the main valve . 25 10.1.2 Marking on an identification plate . 26
21、10.2 Sealing of a CSPRS . 26 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC (PED) 27 Bibliography . 28 DIN EN ISO 4126-5:2016-12 EN ISO 4126-5:2013 + A1:2016 (E) 4 Foreword to EN ISO 4126-5:2013 This document (EN ISO 4126-5:
22、2013) has been prepared by Technical Committee ISO/TC 185 “Safety devices 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 s
23、tandard, either by publication of an identical text or by endorsement, 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 rig
24、hts. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 4126-5:2004. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential re
25、quirements of EU Directive. For relationship with EU Directive, see informative 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: Aust
26、ria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, 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, Swede
27、n, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4126-5:2013 has been approved by CEN as EN ISO 4126-5:2013 without any modification. EN ISO 4126 consists of the following parts, under the general title Safety devices for protection against excessive pressure: Part 1
28、: Safety valves Part 2: Bursting disc safety devices Part 3: Safety valves and bursting disc safety devices in combination Part 4: Pilot operated safety valves Part 5: Controlled safety pressure relief systems (CSPRS) Part 6: Application, selection and installation of bursting disc safety devices Pa
29、rt 7: Common data DIN EN ISO 4126-5:2016-12 EN ISO 4126-5:2013 + A1:2016 (E) 5 Part 9: Application and installation of safety devices excluding stand-alone bursting disc safety devicesN1) Part 10: Sizing of safety valves for gas/liquid two-phase flowN1) Part 11: Performance testing1)Part 7 contains
30、data that are common to more than one of the parts of ISO 4126 to avoid unnecessary repetition. N1) At present only available as ISO standard. 1)Under preparation DIN EN ISO 4126-5:2016-12EN ISO 4126-5:2013 + A1:2016 (E) 6 !European foreword to EN ISO 4126-5:2013/A1:2016“ !This document (EN ISO 4126
31、-5:2013/A1:2016) has been prepared by Technical Committee ISO/TC 185 “Safety devices for protection against excessive pressure” 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 4126-5:201
32、3 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest 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 t
33、his 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 has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential re
34、quirements of EU Directive(s). For relationship with EU Directive, see informative Annex ZA, which is an integral part of EN ISO 4126-5:2013. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standa
35、rd: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spai
36、n, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4126-5:2013/Amd 1:2016 has been approved by CEN as EN ISO 4126-5:2013/A1:2016 without any modification.“ DIN EN ISO 4126-5:2016-12 EN ISO 4126-5:2013 + A1:2016 (E) 7 1 Scope This part of ISO 4126 specifies the
37、requirements for controlled safety pressure relief systems (CSPRS) irrespective of the fluid for which they are designed. It is applicable for main valves having a flow diameter of 4 mm and above which are for use at pressures of 0,1 bar gauge and above. No limitation is placed on temperature. This
38、is a product standard and is not applicable to applications. 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 (
39、including any amendments) applies. ISO 4126-7:2013, Safety devices for protection against excessive pressure Part 7: Common data 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 controlled safety pressure relief system CSPRS system consisting
40、of a main valve in combination with a control unit Note 1 to entry: See Figure 1 for the components of a CSPRS. Note 2 to entry: On reaching the set pressure, the operating forces on the main valve are by means of the control unit automatically applied, released or so reduced that a main valve disch
41、arges a specified quantity of the fluid so as to prevent the predetermined pressure being exceeded. The system is so designed that the main valve re-closes and prevents a further flow of fluid after normal pressure conditions of service have been restored. Note 3 to entry: Specific types of CSPRS ar
42、e installed to protect the downstream system by preventing further fluid input (safety shut-off valve). In this case the closing function shall meet the same requirements as the opening function of the relief valve (see 5.1.5). 3.2 main valve valve consisting of the parts of a CSPRS through which th
43、e discharge capacity is achieved, and the actuator 3.3 relieving principle principle in which a main valve opens when the operating force is released or reduced, and in which the main valve closes when the operating force is re-applied Note 1 to entry: See Figure 2, Type 1. DIN EN ISO 4126-5:2016-12
44、 EN ISO 4126-5:2013 + A1:2016 (E) 8 3.4 loading principle principle in which a main valve opens when the operating force is applied, and in which the main valve closes when the operating force is removed Note 1 to entry: See Figure 2, Type 2. 3.5 control unit unit which establishes the opening and c
45、losing of the main valve Note 1 to entry: The arrangement shall consist of redundant individual control paths in operation (see 5.1.13 and 5.1.15). The individual control path may consist of pressure tapping line, pressure sensor, sensing line, control module and control line see Figures 1 a), 1 b)
46、and 1 c), principle for two control paths. 3.6 pressure tapping line line to the pressure sensor 3.7 sensing line line between the pressure sensor and control module 3.8 control line line between the control module and the main valve 3.9 pressure sensor comparator in which a predetermined adjustable
47、 value of pressure is compared with the actual system pressure Note 1 to entry: On reaching the predetermined pressure, a signal is transmitted to the control unit. The signal to the control unit is removed when the system pressure has been lowered to a predetermined pressure. 3.10 control module mo
48、dule which transforms the signal from the pressure sensor into a force to operate the actuator of the main valve 3.11 closed circuit principle principle characterized by the fact that on failure of the external control energy, the control unit effects the loading or relief of the main valve 3.12 ope
49、n circuit principle principle characterized by the fact that on failure of the external control energy the control unit does not change the loading or relief of the main valve 3.13 operating force force which causes the main valve to operate DIN EN ISO 4126-5:2016-12 EN ISO 4126-5:2013 + A1:2016 (E) 9 3.14 set pressure of a CSPRS predetermined pressure at which a main valve disc under operating conditions commences to open Note 1 to entry: It is t
