1、August 2016 English price group 12No 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 23.020.40; 23.080!%XtE“2538134www
2、din.deDIN EN ISO 24490Cryogenic vessels Pumps for cryogenic service (ISO 24490:2016);English version EN ISO 24490:2016,English translation of DIN EN ISO 24490:2016-08Kryo-Behlter Pumpen fr den Kryo-Betrieb (ISO 24490:2016);Englische Fassung EN ISO 24490:2016,Englische bersetzung von DIN EN ISO 2449
3、0:2016-08Rcipients cryogniques Pompes pour service cryognique (ISO 24490:2016);Version anglaise EN ISO 24490:2016,Traduction anglaise de DIN EN ISO 24490:2016-08SupersedesDIN EN 13275:2000-11www.beuth.deDocument comprises 23 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-langua
4、ge original shall be considered authoritative.07.16 DIN EN ISO 24490:2016-08 2 A comma is used as the decimal marker. National foreword This document (EN ISO 24490:2016) has been prepared by Technical Committee ISO/TC 220 “Cryogenic vessels in collaboration with Technical Committee CEN/TC 268 “Cryog
5、enic vessels and specific hydrogen technologies applications” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was DIN-Normenausschuss Druckgasanlagen (DIN Standards Committee Pressurized Gas Installations), Working Committee NA 016-00-05 AA Kryo-Behlter; Spiegel
6、ausschuss zu CEN/TC 268 und ISO/TC 220. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 5198:1987 DIN EN ISO 5198:1999-12 ISO 5199 DIN EN ISO 5199 ISO 6708:1995 DIN EN ISO 6708:1995-09 ISO 9908 DIN ISO 9908 ISO 13709 DIN EN ISO 13709 IS
7、O 21028-1 DIN EN ISO 21028-1 ISO 21028-2 DIN EN ISO 21028-2 Amendments This standard differs from DIN EN 13275:2000-11 as follows: a) ISO 24490 and EN 13275 have been combined into one standard, consolidated and adopted as this document; b) the pressure to be used for hydraulic testing, prototype te
8、sting and production testing has been reduced; c) the document has been editorially revised. Previous editions DIN EN 13275: 2000-11 DIN EN ISO 24490:2016-08 3 National Annex NA (informative) Bibliography DIN EN ISO 5198:1999-12, Centrifugal, mixed flow and axial pumps Code for hydraulic performance
9、 tests Precision class (ISO 5198:1987) DIN EN ISO 5199, Technical specifications for centrifugal pumps Class II DIN EN ISO 6708:1995-09, Pipework components Definition and selection of DN (nominal size) (ISO 6708:1995) DIN ISO 9908, Centrifugal pumps Technical specifications for centrifugal pumps Cl
10、ass III DIN EN ISO 13709, Centrifugal pumps for petroleum, petrochemical and natural gas industries DIN EN ISO 21028-1, Cryogenic vessels Toughness requirements for materials at cryogenic temperature Part 1: Temperatures below -80 degrees C DIN EN ISO 21028-2, Cryogenic vessels Toughness requirement
11、s for materials at cryogenic temperature Part 2: Temperatures between -80 C and -20 C DIN EN ISO 24490:2016-08 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 24490 April 2016 ICS 23.020.40 Supersedes EN 13275:2000English Version Cryogenic vessels - Pumps
12、for cryogenic service(ISO 24490:2016) Rcipients cryogniques - Pompes pour service cryognique (ISO 24490:2016) Kryo-Behlter Pumpen fr den Kryo-Betrieb -(ISO24490:2016) This European Standard was approved by CEN on 15 March 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulation
13、s 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 CEN member. Th
14、is 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 versions. CEN mem
15、bers 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, Poland, Portu
16、gal, 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 exploitation in any fo
17、rm and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 24490:2016 E1 European foreword . 31 Scope . 52 Normative references 53 Terms and definitions . 54 Requirements for pumps . 64.1 General . 64.2 Materials . 64.2.1 General 64.2.2 Mechanical properties at low temperature
18、64.2.3 Corrosion resistance . 74.2.4 Oxygen and oxidizing fluids compatibility 74.2.5 Hydrogen compatibility . 84.3 Design . 84.3.1 Pressure-containing parts . 84.3.2 Performance 84.3.3 Clearances 84.3.4 Prevention of rubbing 84.3.5 Fastenings 84.3.6 Warm bearings 84.3.7 Cold bearings 84.3.8 Bearing
19、 lubrication 94.3.9 Shaft seals 94.3.10 Purging . 94.3.11 Prevention of particle contamination 94.3.12 Specific requirement for flammable liquids . 94.3.13 Protection against over-pressurization 104.3.14 Pump motors 105 Test procedures 105.1 Prototype testing 105.1.1 General. 105.1.2 Design evaluati
20、on . 105.1.3 Performance evaluation 105.1.4 Initial tests 105.1.5 Cryogenic tests 115.2 Production testing . 115.2.1 General. 115.2.2 Hydrostatic pressure test 115.2.3 Mechanical running and performance test 126 Cleanliness . 127 Marking . 12Annex A (informative) Guidance on installation design . 13
21、Annex B (informative) Acceptable materials for construction of centrifugal pumps for liquid oxygen .15Bibliography .19Contents PageDIN EN ISO 24490:2016-08 EN ISO 24490:2016 (E) 2Foreword . 4European foreword This document (EN ISO 24490:2016) has been prepared by Technical Committee ISO/TC 220 “Cryo
22、genic vessels” in collaboration with Technical Committee CEN/TC 268 “Cryogenic vessels and specific hydrogen technologies applications” 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
23、 endorsement, at the latest by October 2016, and conflicting national standards shall be withdrawn at the latest by October 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
24、 identifying any or all such patent rights. This document supersedes EN 13275:2000. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According to the CEN-CENELEC Internal Regulations, the national standards organizations
25、 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, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, N
26、etherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 24490:2016 has been approved by CEN as EN ISO 24490:2016 without any modification. DIN EN ISO 24490:2016-08 EN ISO 24490:2016 (E) 3 Forewor
27、dISO (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 technical committees. Each member body interested in a subject for which a technical
28、 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 with the International Electrotechnical Commission (IEC) on all matters of elec
29、trotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was d
30、rafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). 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
31、 rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not co
32、nstitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe
33、committee responsible for this document is ISO/TC 220, Cryogenic vessels.This second edition cancels and replaces the first edition (ISO 24490:2005), which has been technically revised.DIN EN ISO 24490:2016-08 EN ISO 24490:2016 (E) 4 1 ScopeThis International Standard specifies the minimum requireme
34、nts for the design, manufacture and testing of pumps for cryogenic service.This International Standard is applicable to centrifugal pumps. However, it can be applied to other types of cryogenic pumps (e.g. reciprocating pumps), where applicable.This International Standard also gives guidance on the
35、design of installations (see Annex A).It does not specify requirements for operation or maintenance.NOTE For cryogenic fluids, see ISO 21029-1, ISO 20421-1 and/or ISO 21009-1.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indis
36、pensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5198, Centrifugal, mixed flow and axial pumps Code for hydraulic performance tests Precision gradeISO 21010
37、 Cryogenic vessels Gas/materials compatibilityISO 21028-1, Cryogenic vessels Toughness requirements for materials at cryogenic temperature Part 1: Temperatures below 80 CISO 21028-2, Cryogenic vessels Toughness requirements for materials at cryogenic temperature Part 2: Temperatures between 80 C an
38、d 20 CISO 23208, Cryogenic vessels Cleanliness for cryogenic service3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1nominal sizeDNalphanumeric designation of size for components of a pipework system, which is used for reference purposesNote 1 to
39、 entry: It comprises 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 connections.Note 2 to entry: The number following the letters DN does not represent a measurable value and is not
40、to be used for calculation purposes except where specified in the relevant standard.Note 3 to entry: In those standards which use the DN designation system, any relationship between DN and component dimensions is given, e.g. DN/OD or DN/ID.SOURCE: ISO 6708:1995, 2.1, modifiedDIN EN ISO 24490:2016-08
41、 EN ISO 24490:2016 (E) 5 3.2nominal pressurePNalphanumeric designation used for reference purposes related to a combination of mechanical and dimensional characteristics of a component of a pipework systemNote 1 to entry: It comprises the letters PN followed by a dimensionless number equal to at lea
42、st the maximum allowable pressure in bar.Note 2 to entry: For a pump, PN can be different for inlet and outlet.Note 3 to entry: For Europe, PN equals the design pressure (PS) as defined in the Pressure Equipment Directive (2014/68/EU).3.3specified minimum temperaturelowest temperature for which the
43、pump is specified3.4duty pointperformance point defined by pressure or head and volume or mass flow rate3.5net positive suction headNPSHinlet total head increased by the head (in flowing liquid) corresponding to the atmospheric pressure at the test location and decreased by the sum of the head corre
44、sponding to the vapour pressure of the pump liquid at the inlet temperature and the inlet impeller heightNote 1 to entry: See also ISO 5198:1987, Table 1.4 Requirements for pumps4.1 GeneralCryogenic centrifugal pumps shall comply with appropriate general standards. The appropriate general standard(s
45、) shall be subject to the particular circumstances and applicable regulations and should be agreed between the manufacturer and the purchaser.NOTE Commonly used standards are, e.g. ISO 5199, ISO 13709 (ANSI/API 610) or EN 809.In the event of conflict, the requirements of this International Standard
46、shall take precedence over the general standards.4.2 Materials4.2.1 GeneralMaterials of construction shall be selected taking into consideration that cryogenic pumps operate at low temperature, often in a damp environment, and at times with liquid oxygen or flammable fluids.The minimum requirements
47、given in 4.2.2, 4.2.3 and 4.2.4 shall apply.4.2.2 Mechanical properties at low temperatureMetallic materials which are under stress at low temperature and which exhibit a ductile/brittle transition (such as ferritic steels) shall have minimum toughness values in accordance with ISO 21028-1 or ISO 21
48、028-2 as appropriate.DIN EN ISO 24490:2016-08 EN ISO 24490:2016 (E) 6 Metallic materials which can be shown to have no ductile/brittle transition do not require impact testing.Non-metallic materials are generally used only for seals or heat barriers. If such materials are to be used for structural parts, the stress levels and material impact val
