1、December 2016 English price group 13No 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!%V1“2595114www.din.deDIN
2、 EN ISO 4126-1Safety devices for protection against excessive pressure Part 1: Safety valves (ISO 41261:2013 + Amd 1:2016);English version EN ISO 41261:2013 + A1:2016,English translation of DIN EN ISO 4126-1:2016-12Sicherheitseinrichtungen gegen unzulssigen berdruck Teil 1: Sicherheitsventile (ISO 4
3、1261:2013 + Amd 1:2016);Englische Fassung EN ISO 41261:2013 + A1:2016,Englische bersetzung von DIN EN ISO 4126-1:2016-12Dispositifs de scurit pour protection contre les pressions excessives Partie 1: Soupapes de sret (ISO 41261:2013 + Amd 1:2016);Version anglaise EN ISO 41261:2013 + A1:2016,Traducti
4、on anglaise de DIN EN ISO 4126-1:2016-12SupersedesDIN EN ISO 41261:201312www.beuth.deDocument comprises 26 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.12.16 DIN EN ISO 4126-1:2016-12 2 A comma is used as the decimal marker.
5、 National foreword This document (EN ISO 4126-1:2013 + 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” (Secretariat: AFNOR, France). The responsible German
6、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 possibility that some of the elements of this document may be the subject of patent ri
7、ghts. 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 !“. Users of this standard are advised to take note of the following: Ever since DIN EN 12828:2003 came into ef
8、fect there has been a lack of information on the German market regarding the applicability and scope of various technical rules in Germany on safety valves used in water-based heating systems. Since December 2002, the German technical rules for steam boilers, the “TRD” rules, have not been further r
9、evised and developed and thus do not reflect the current state of the art. They are also no longer legally binding. The only legally binding regulation in Germany relating to the manufacturing of pressure equipment is European Directive 97/23/EC, the “Pressure Equipment Directive (PED)”, while the B
10、etriebssicherheitsverordnung (BetrSichV) (German Ordinance on industrial safety and health) governs the operation of such equipment. EN ISO 4126-1:2013 only lays down general specifications for safety valves and does not address requirements for specific applications. Because of this, and because th
11、e DIN 4751 series of standards has been replaced by EN 12828, safety valves used in heating systems are not directly covered by any European technical rules. For example, the lack of protective devices (membranes, bellows etc.) as described in TRD 721 can lead to serious damage to the heating system
12、, which can also have safety repercussions. For this reason, particular requirements for safety valves used in heating systems are described in detail in the informative National Annex NA. Amendments This standard differs from DIN EN ISO 4126-1:2013-12 as follows: a) the text in Subclause 7.2.1 “Gen
13、eral requirements” has been revised. Previous editions DIN EN ISO 4126-1: 2004-05, 2013-12 DIN EN ISO 4126-1:2016-12 3 National Annex NA (informative) Classification of safety valves for heating systems a) Safety valves with a response overpressure of 2,5 or 3,0 bar and marked with the letter “H” (a
14、ccording to TRD 721, Clause 7, 08/1997); b) Safety valves marked with the letters D/G/H (in English: S/G/H, Steam/Gas/Hot water, according to TRD 721, Clause 6, 08/1997); c) Safety valves for indirectly heated systems (according to the withdrawn standard DIN 4751-2:1994-10, Subclause 8.1). Safety va
15、lves marked with the letters D/G/H Such safety valves are to meet the following additional requirements: The protective device for the spring and sliding or rotating elements shall be pressure relieved when the safety valve is closed. This protective device shall not have a sealing function for the
16、valve seat at the same time. The spring shall be positioned in a closed cap. The spring cap shall have two ports located at the lowest possible point with a diameter of at least 6 mm each or one port located at the lowest possible point with a diameter of at least 10 mm. The sealing surface of the v
17、alve disc shall be compressible and designed with a metallic support. Sliding and rotating elements as well as springs shall be protected against the mediums effects by means of bellows or a membrane or a similar device made from metal or elastomer. In addition to the requirements of Subclause 7.2.1
18、, when the operating overpressure is below 3 bar, an overpressure in excess of maximal 0,3 bar is admissible. In Germany, instead of marking with “G”, “S” and “L” as specified in 10.1, the letters “D/G/H” are to be used. Safety valves with a response overpressure of 2,5 or 3,0 bar and marked with th
19、e letter “H” Such safety valves shall meet the following additional requirements: The mediums pressure shall be exerted on the valve disc. The protective device for the spring and sliding or rotating elements shall be pressure relieved when the safety valve is closed. The spring cap shall have two p
20、orts with a diameter of at least 6 mm each. The connection between the body and the spring cap shall be able to sustain the expected forces and designed so that after the removal and re-assembly of the spring cap, the set pressure remains unchanged and the protective device is not damaged. The threa
21、ded connection of the outlet shall be at least one nominal size category higher than the threaded connection at the inlet. Safety valves shall be able to reliably prevent a pressure in excess of more than 0,5 bar. When the pressure drops within a range of 0,5 bar, the closing pressure shall be below
22、 the response overpressure. In Germany, instead of marking as specified in 10.1, the letter “H” shall be used. Specifications for the design and dimensions of such safety valves are given in DIN EN 12828:2014-07, Annex E. DIN EN ISO 4126-1:2016-12 4 This page is intentionally blank EUROPEAN STANDARD
23、 NORME EUROPENNE EUROPISCHE NORM EN ISO 4126-1:2013 July 2013 + A1 June 2016 ICS 13.240 English Version Safety devices for protection against excessive pressure Part 1: Safety valves (ISO 4126-1:2013 + Amd 1:2016) Dispositifs de scurit pour protection contre les pressions excessives Partie 1: Soupap
24、es de sret (ISO 4126-1:2013 + Amd 1:2016) Sicherheitseinrichtungen gegen unzulssigen berdruck Teil 1: Sicherheitsventile (ISO 4126-1:2013 + Amd 1:2016) EN ISO 4126-1:2013 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 Inter
25、nal 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-CENELEC Management Centre or to any
26、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-CENELEC Management Centre has the same status as the official ver
27、sions. 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
28、Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United 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 exploitat
29、ion in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4126-1:2013 + A1:2016 EEN ISO 4126-1:2013 + A1:2016 (E) 2 Contents Page European foreword to EN ISO 4126-1:2013 3 !European foreword to EN ISO 4126-1:2013/A1:2016“ 5 1 Scope 6 2 Normative references 6 3 Ter
30、ms and definitions . 6 4 Symbols and units . 9 5 Design 9 5.1 General 9 5.2 Valve end connections 10 5.3 Minimum requirements for springs 11 5.4 Materials 11 6 Production testing . 12 6.1 Purpose 12 6.2 General . 12 6.3 Hydrostatic testing 12 6.4 Pneumatic testing 13 6.5 Adjustment of set or cold di
31、fferential test pressure . 14 6.6 Seat leakage test . 14 7 Type testing 14 7.1 General . 14 7.2 Tests to determine operating characteristics 16 7.3 Tests to determine flow characteristics 17 7.4 Determination of the coefficient of discharge . 19 7.5 Certification of coefficient of discharge . 19 8 D
32、etermination of safety valve performance. 20 9 Sizing of safety valves . 20 10 Marking and sealing 20 10.1 Marking 20 10.2 Sealing of a safety valve . 20 Annex ZA (informative) Relationship between this International Standard and the Essential Requirements of EU Directive 97/23/EC (PED) . 21 Bibliog
33、raphy . 22 DIN EN ISO 4126-1:2016-12 EN ISO 4126-1:2013 + A1:2016 (E) 3 European foreword to EN ISO 4126-1:2013 This document (EN ISO 4126-1:2013) has been prepared by Technical Committee ISO/TC 185 “Safety devices for protection against excessive pressure” in collaboration with Technical Committee
34、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 January 2014, and conflicting national standards shall be withdrawn at the
35、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 any or all such patent rights. This document supersedes EN ISO 4126-1:2004. This document has
36、 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(s), see informative Annex ZA, which is an integral part of this document. According to the CEN-CE
37、NELEC 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 Macedonia, France, Germany, Greece, Hungary,
38、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 4126-1:2013 has been approved by CEN as EN ISO 4126-1:2013 without any modi
39、fication. EN ISO 4126 consists of the following parts, under the general title Safety devices for protection against excessive pressure: Part 1: Safety valves Part 2: Bursting disc safety devices Part 3: Safety valves and bursting disc safety devices in combination Part 4: Pilot operated safety valv
40、es Part 5: Controlled safety pressure relief systems (CSPRS) Part 6: Application, selection and installation of bursting disc safety devices Part 7: Common data DIN EN ISO 4126-1:2016-12 EN ISO 4126-1:2013 + A1:2016 (E) 4 Part 9: Application and installation of safety devices excluding stand-alone b
41、ursting disc safety devicesN1) Part 10: Sizing of safety valves for gas/liquid two-phase flowN1) Part 11: Performance testing1)Part 7 contains 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 prepar
42、ation DIN EN ISO 4126-1:2016-12 EN ISO 4126-1:2013 + A1:2016 (E) 5 !European foreword to EN ISO 4126-1:2013/A1:2016“ !This document (EN ISO 4126-1:2013/A1:2016) has been prepared by Technical Committee ISO/TC 185 “Safety devices for protection against excessive pressure” in collaboration with Techni
43、cal Committee CEN/TC 69 “Industrial valves” the secretariat of which is held by AFNOR. This Amendment to the European Standard EN ISO 4126-1:2013 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 confli
44、cting 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 such patent rights. This docum
45、ent 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 informative Annex ZA, which is an integral part of EN ISO 4126-1:2013. According to the
46、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 Macedonia, France, Germany, Greece, Hun
47、gary, 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 4126-1:2013/Amd 1:2016 has been approved by CEN as EN ISO 4126-1:2013
48、/A1:2016 without any modification.“ DIN EN ISO 4126-1:2016-12 EN ISO 4126-1:2013 + A1:2016 (E) 6 1 Scope This part of ISO 4126 specifies general requirements for safety valves irrespective of the fluid for which they are designed. It is applicable to safety valves having a flow diameter of 4 mm and
49、above which are for use at set pressures of 0,1 bar gauge and above. No limitation is placed on temperature. This is a product standard and is not applicable to applications of safety valves. 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 amen
