1、May 2017 English price group 15No 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 23.060.01!%do“2659676www.din.deDIN E
2、N ISO 28921-1Industrial valves Isolating valves for lowtemperature applications Part 1: Design, manufacturing and production testing (ISO 289211:2013);English version EN ISO 289211:2017,English translation of DIN EN ISO 28921-1:2017-05Industriearmaturen Absperrventile fr die Anwendung im Tieftempera
3、turbereich Teil 1: Auslegung, Fertigung und Produktionsprfung (ISO 289211:2013);Englische Fassung EN ISO 289211:2017,Englische bersetzung von DIN EN ISO 28921-1:2017-05Robinetterie industrielle Robinets disolement pour application basses tempratures Partie 1: Conception, essais de fabrication et de
4、production (ISO 289211:2013);Version anglaise EN ISO 289211:2017,Traduction anglaise de DIN EN ISO 28921-1:2017-05Together with DIN EN ISO 289212:201705,supersedesDIN EN 12567:200010www.beuth.deDocument comprises 33 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language origin
5、al shall be considered authoritative.05.17 DIN EN ISO 28921-1:2017-05 2 A comma is used as the decimal marker. National foreword The text of ISO 28921-1:2013 has been prepared by Technical Committee ISO/TC 153 “Valves” and has been taken over as EN ISO 28921-1:2017 by Technical Committee CEN/TC 69 “
6、Industrial valves” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Armaturen (DIN Standards Committee Valves), Working Committee NA 003-01-10 AA “Safety devices for the prevention of excessive pressure”. The DIN Standards corresponding to
7、the International Standards referred to in this document are follows: ISO 3506-1 DIN EN ISO 3506-1 ISO 6708 DIN EN ISO 6708 ISO 10434 DIN EN ISO 10434 ISO 10497 DIN EN ISO 10497 ISO 15761 DIN EN ISO 15761 ISO 17292 DIN EN ISO 17292 Amendments This standard differs from DIN EN 12567:2000-10 as follow
8、s: a) requirements from DIN EN 12567:2000-10 have been brought in line with DIN EN ISO 28921-1 and DIN EN ISO 28921-2; Previous editions DIN EN 12567: 2000-10 DIN EN ISO 28921-1:2017-05 3 National Annex NA (informative) Bibliography DIN EN ISO 3506-1, Mechanical properties of corrosion-resistant sta
9、inless steel fasteners Part 1: Bolts, screws and studs DIN EN ISO 6708, Pipework components Definition and selection of DN (nominal size) DIN EN ISO 10434, Bolted bonnet steel gate valves for the petroleum, petrochemical and allied industries DIN EN ISO 10497, Testing of valves Fire type-testing req
10、uirements DIN EN ISO 15761, Steel gate, glob and check valves for sizes DN 100 and smaller, for the petroleum and natural gas industries DIN EN ISO 17292, Metal ball valves for petroleum, petrochemical and allied industries DIN EN ISO 28921-1:2017-05 4 This page is intentionally left blank EUROPEAN
11、STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 28921-1 February 2017 ICS 23.060.01 Supersedes EN 12567:2000English Version Industrial valves - Isolating valves for low-temperature applications - Part 1: Design, manufacturing and production testing (ISO 28921-1:2013) Robinetterie industrielle - Robi
12、nets disolement pour application basses tempratures - Partie 1: Conception, essais de fabrication et de production (ISO 28921-1:2013) Industriearmaturen - Absperrventile fr die Anwendung im Tieftemperaturbereich - Teil 1: Auslegung, Fertigung, Produktionsprfung (ISO 28921-1:2013) This European Stand
13、ard was approved by CEN on 10 January 2017. 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
14、such national standards may be obtained 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
15、own language and notified to the CEN-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
16、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMIT
17、EE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 28921-1:2017 EEN ISO 28921-1:2017 (E) 2 Contents Page European foreword . 4 Foreword 5 Introduc
18、tion 6 1 Scope 7 2 Normative references 7 3 Terms and definitions . 8 4 Requirements . 9 4.1 Materials . 9 4.1.1 General 9 4.1.2 Metallic materials 10 4.1.3 Internal non-metallic materials 10 4.2 Design . 10 4.2.1 General . 10 4.2.2 Body/bonnet wall thickness 10 4.2.3 Body and bonnet extension 10 4.
19、2.4 Stem . 15 4.2.5 Seats and seating surfaces 15 4.2.6 Provision for internal pressure relief. 15 4.2.7 Operating means 15 4.2.8 Electric continuity and fire-safe design . 16 5 Testing 16 5.1 Production testing with low-temperature test 16 6 Sampling 16 6.1 Lot requirements 16 6.2 Sample size . 17
20、6.3 Lot acceptance . 17 7 Marking, labelling and packaging 17 Annex A (normative) Test procedure for production testing of valves at low temperature . 19 A.1 General . 19 A.2 Test procedures 19 A.2.1 Testing flow chart 19 A.2.2 Ambient temperature test 20 A.2.3 Low-temperature test . 21 A.2.4 Warm-u
21、p procedure and post-test examination 22 A.3 Test temperatures . 22 A.3.1 Ambient temperature . 22 A.3.2 Low temperature 22 A.4 Test pressures . 22 A.4.1 Low-pressure seat test . 22 A.4.2 Incremental high-pressure seat test . 22 A.5 Duration of seat test 22 A.6 Direction of seat test . 23 A.7 Allowa
22、ble seat leakage rates 23 DIN EN ISO 28921-1:2017-05 EN ISO 28921-1:2017 (E) 3 A.8 Test set-up for low-temperature tests 23 A.8.1 Test equipment 23 A.8.2 Cooling of the valve 24 A.8.3 Test gas . 25 A.8.4 Instruments 25 A.9 Flowmeters, flowmeter calibration, seat leak and correction factors 25 A.9.1
23、Flowmeter . 25 A.9.2 Flowmeter calibration 25 A.9.3 Temperature correction 25 A.9.4 Pressure correction . 26 Annex B (informative) Low-temperature test record 27 Bibliography . 29 DIN EN ISO 28921-1:2017-05 European foreword The text of ISO 28921-1:2013 has been prepared by Technical Committee ISO/T
24、C 153 “Valves” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 28921-1:2017 by 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
25、 publication of an identical text or by endorsement, at the latest by August 2017, and conflicting national standards shall be withdrawn at the latest by August 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENE
26、LEC shall not be held responsible for identifying any or all such patent rights. EN ISO 28921-1 and EN ISO 28921-2 supersede EN 12567:2000. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard
27、: 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, Serbia, Slovakia, Slovenia
28、, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 28921-1:2013 has been approved by CEN as EN ISO 28921-1:2017 without any modification. EN ISO 28921-1:2017 (E) DIN EN ISO 28921-1:2017-05 4ForewordISO (the International Organization for Standardization)
29、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 repres
30、ented 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 d
31、rafted 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 S
32、tandard 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 28921-1 was prepare
33、d by Technical Committee ISO/TC 153, Valves, Subcommittee SC 1, Design, manufacture, marking and testing.ISO 28921 consists of the following parts, under the general title Industrial valves Isolating valves for low-temperature applications: Part 1: Design, manufacturing and production testing Part 2
34、: Type testingEN ISO 28921-1:2017 (E) DIN EN ISO 28921-1:2017-05 5 IntroductionThe purpose of this part of ISO 28921 is the establishment of basic requirements and practices for design, fabrication, material selection and production testing of valves used in low-temperature services. The intention i
35、s to provide requirements for design, material selection and valve preparation for valves to be used in low-temperature service.EN ISO 28921-1:2017 (E) DIN EN ISO 28921-1:2017-05 61 ScopeThis part of ISO 28921 specifies requirements for design, dimensions, material, fabrication and production testin
36、g of isolation valves for low-temperature applications.It applies to gate, globe, check, butterfly and ball valves and can be used for other valve types used in low-temperature services.This part of ISO 28921 covers isolation valves for use in cryogenic temperature service where the design low-tempe
37、rature service is 50 C down to 196 C.This part of ISO 28921 does not apply to valves for cryogenic services, designed in accordance with ISO 21011, used with cryogenic vessels.Where the requirements of this part of ISO 28921 vary from those given in the valve product standards, the requirements of t
38、his part of ISO 28921 apply.This part of ISO 28921 covers valves with body, bonnet, bonnet extension or cover made of metallic materials.It covers valves of nominal sizes DN: 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 650; 700; 750; 800; 850; 900,corre
39、sponding to nominal pipe sizes NPS: 3/8; 1/2; 3/4; 1; 11/4; 11/2; 2; 21/2; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 26; 28; 30; 32; 34; 36,and applies to pressure designations: PN 16; 25; 40; 100; 160; 250. Class 150; 300; 600; 800; 900; 1 500.NOTE PN 250 and Class 1 500 in sizes DN 100 and NPS 4
40、are not covered in this part of ISO 28921.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable to its application. For dated references, only the edition cited applies. For undated references, the latest edition of the
41、referenced document (including any amendments) applies.ISO 5208, Industrial valves Pressure testing of metallic valvesISO 5209, General purpose industrial valves MarkingISO 10434, Bolted bonnet steel gate valves for the petroleum, petrochemical and allied industriesISO 10497, Testing of valves Fire
42、type-testing requirementsISO 10631, Metallic butterfly valves for general purposesISO 14313, Petroleum and natural gas industries Pipeline transportation systems Pipeline valvesEN ISO 28921-1:2017 (E) DIN EN ISO 28921-1:2017-05 7 ISO 15761, Steel gate, globe and check valves for sizes DN 100 and sma
43、ller, for the petroleum and natural gas industriesISO 17292, Metal ball valves for petroleum, petrochemical and allied industriesEN 12516-1, Industrial valves Shell design strength Part 1: Tabulation method for steel valve shellsEN 12516-2, Industrial valves Shell design strength Part 2: Calculation
44、 method for steel valve shellsEN 12516-3, Valves Shell design strength Part 3: Experimental methodEN 1515-1, Flanges and their joints Bolting Part 1: Selection of boltingEN 13480-2, Metallic industrial piping Part 2: MaterialsAPI 607, Fire Test for Quarter-turn Valves and Valves Equipped with Nonmet
45、allic SeatsAPI 6FA, Specification for Fire Test for ValvesANSI/ASME B16.34, Valves Flanged, Threaded and Welding EndASME B31.3, Process PipingASME, ASME Boiler and Pressure Vessel Code, Section VIII3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.
46、1nominal sizeDNalphanumeric 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 c
47、onnectionsSOURCE: ISO 6708:1995, definition 2.13.2nominal pressurePNnumerical designation relating to pressure that is a convenient rounded number for reference purposes, and which comprises the letters PN followed by the appropriate reference numberNote 1 to entry: It is intended that all equipment
48、 of the same nominal size (DN) designated by the same PN number shall have compatible mating dimensions.Note 2 to entry: The maximum allowable pressure depends on materials, design and working temperature, and is to be selected from the tables of pressure/temperature ratings given in the appropriate
49、 standards.SOURCE: ISO 7268:1983, Clause 2, modified.3.3NPSalphanumeric 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 connectionsNote 1 to entry: The number following the letters NPS does not represent a measurable value an
