1、BRITISH STANDARDBS 2000-512: 2005 BS EN ISO 20764:2003Methods of test for petroleum and its productsPart 512: Petroleum and related products Preparation of a test portion of high-boiling liquids for the determination of water content Nitrogen purge method (Identical with IP 512:2005)The European Sta
2、ndard EN ISO 20764:2003 has the status of a British StandardICS 75.080g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 20764:2003This Briti
3、sh Standard was published under the authority of the Standards Policy and Strategy Committee on 2 December 2003 BSI 20 January 2006ISBN 0 580 43009 XNational forewordThis British Standard is the official English language version of EN ISO 20764:2003. It is identical with ISO 20764:2003.The UK partic
4、ipation in its preparation was entrusted to Technical Committee PTI/13, Petroleum testing and terminology, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.The Energy Institute, under the brand of IP publishes and sell
5、s all parts of BS 2000, and all BS EN petroleum test methods that would be part of BS 2000, both in its annual publication “Standard methods for analysis and testing of petroleum and related products and British Standard 2000 parts” and individually.Further information is available from:Energy Insti
6、tute, 61 New Cavendish Street, London W1G 7AR. Tel: 020 7467 7100. Fax: 020 7255 1472.Cross-referencesThe British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Ind
7、ex”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confe
8、r immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgat
9、e them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii and iii, a blank page, pages 1 to 9, the Annex ZA page, an inside back cover and a back cover.The BSI copyright notice displaye
10、d in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date Comments16065 January 2006 Correction to numbering of standardEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 20764October 2003ICS 75.080English versionPetroleum and related products
11、 - Preparation of a test portion ofhigh-boiling liquids for the determination of water content -Nitrogen purge method (ISO 20764:2003)Ptrole et produits connexes - Prparation dune prisedessai de liquides haut point dbullition en vue dudosage de leau - Mthode par purge lazote (ISO20764:2003)Mineralle
12、rzeugnisse und verwandte Produkte -Herstellung eines Probenteiles von hochsiedendenFlssigkeiten fr die Bestimmung des Wassergehaltes -Verfahren mit Stickstoff-Splung (ISO 20764:2003)This European Standard was approved by CEN on 1 October 2003.CEN members are bound to comply with the CEN/CENELEC Inte
13、rnal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the na
15、tional standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NOR
16、MALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 20764:2003 EI NESO 02:4672003 (E)2ForewordThis document (EN ISO 20764:2003) has b
17、een prepared by Technical Committee ISO/TC 28“Petroleum products and lubricants“ in collaboration with Technical Committee CEN/TC 19“Petroleum products, lubricants and related products“, the secretariat of which is held by NEN.This European Standard shall be given the status of a national standard,
18、either by publication ofan identical text or by endorsement, at the latest by April 2004, and conflicting nationalstandards shall be withdrawn at the latest by April 2004.According to the CEN/CENELEC Internal Regulations, the national standards organizations ofthe following countries are bound to im
19、plement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland andthe United Kingdom.Endorsement noticeThe text of ISO 20764:2003 has b
20、een approved by CEN as EN ISO 20764:2003 without anymodifications.NOTE Normative references to International Standards are listed in Annex ZA (normative).EN ISO 20764:2003Reference numberISO 20764:2003(E)OSI 3002INTERNATIONAL STANDARD ISO20764First edition2003-10-15Petroleum and related products Pre
21、paration of a test portion of high-boiling liquids for the determination of water content Nitrogen purge method Ptrole et produits connexes Prparation dune prise dessai de liquides haut point dbullition en vue du dosage de leau Mthode par purge lazote EN ISO 20764:2003IS:46702 O3002(E) DPlcsid Fremi
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25、 erse.devr lnUeto sswrehise specified, on trap fo this lbupictaion maeb y cudorperro de tuilizi den yna form ro na ybm ynae,s lecetrinoc ro mceinahcla, incliduntohp gcoiypodna gn micrfoilm, wittuoh repmissii now nritign from ietI rehSa Ot tsserdda eh ebolw or ISOs memreb i ydobn the cnuotfo yr ttseu
26、qer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 avleT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o groWe bwww.is.o groii ISO 3002 Allr ihgtsser edevrEN ISO 20764:2003IS:46702 O3002(E) I SO 3002 All irhgts seredevr iiiForeword ISO (the International Organization for S
27、tandardization) 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 ri
28、ght 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 electrotechnical standardization. Internationa
29、l Standards are drafted 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
30、an International Standard 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
31、 20764 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants. EN ISO 20764:2003blankEN ISO 20764:2003INTENRATIONAL TSANDADR IS:46702 O3002(E)I SO 3002 All irhgts seredevr 1Petroleum and related products Preparation of a test portion of high-boiling liquids for the determin
32、ation of water content Nitrogen purge method WARNING The use of this International Standard may involve hazardous materials, operations and equipment. This International Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of t
33、his International Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 1 Scope This International Standard specifies two procedures for the preparation of test portions from petroleum and related products boiling above
34、200 C, which can then be used for the determination of total water content within the range of 3 mg/kg to 1 000 mg/kg. The method is applicable to unused and used lubricating oils, non-aqueous hydraulic fluids and high-boiling solvents. The test portions generated by these procedures are suitable fo
35、r standard Karl Fischer water-content determinations, such as those described in ISO 6296 (see 1 in the Bibliography) and ISO 12937 (see 2 in the Bibliography). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, onl
36、y the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 383:1976, Laboratory glassware Interchangeable conical ground joints ISO 3170:1), Petroleum liquids Manual sampling 3 Principle 3.1 Atmospheric pressure The wate
37、r is driven out of a weighed portion of the material under test by a nitrogen purge at 120 C. It is then condensed in methanol (4.2) held in a titration vessel (5.4) at approximately 77 C. The resulting water/methanol solution is immediately available for the determination of water content by Karl F
38、ischer titration. 3.2 Reduced pressure For used lubricating oils and high-boiling materials with high-water retaining characteristics, the water is driven out of a weighed portion by a nitrogen purge at 60 C under an absolute pressure of 0,30 kPa to 0,65 kPa. It is collected and titrated in the same
39、 manner as the test portion in 3.1. 1) To be published. (Revision of ISO 3170:1988) EN ISO 20764:2003IS:46702 O3002(E) 2 I SO 3002 All irhgts seredevr4 Reagents and materials 4.1 Nitrogen, of pure grade, containing less than 500 mg/kg of oxygen. The source shall be regulated to a low pressure that g
40、ives agitation without vortex at a flow rate of 3 l/h. It shall be dried through a drying agent upstream of the wash-bottle inlet. NOTE The maximum water-content target of the nitrogen is 1 g/l. 4.2 Methanol, of commercial grade, dried to a water content of not more than 100 mg/kg. Dried methanol sh
41、all be continuously protected by a drying tube containing a suitable drying agent. 4.3 Solid carbon dioxide 4.4 Cooling medium: commercial grade of methanol, ethanol or acetone. 5 Apparatus 5.1 General The layout of the extraction apparatus is illustrated in Figure 1, with details of the titration v
42、essel and inserts shown in Figures 2, 3 and 4. The major components are described in 5.2 to 5.5. Ground-glass joints from different sources may have one of two diameter-to-length ratios. For the purposes of this International Standard, either is suitable, and for some applications, the diameter itse
43、lf can be one of two. However, it is critical that the male and female parts of each joint are from the same series to avoid recession or protuberance. NOTE In Europe, ground-glass joints normally come from a series known as “k = 6” as described in ISO 383, whereas in North America, the series gener
44、ally used is “k = 8”. For joints specified in the figures in this International Standard, these result in joints with dimensions of 14,5/23 and 14,5/30, respectively. 5.2 Heating bath, consisting of a liquid bath of sufficient capacity to hold the wash bottle (5.3), and capable of being controlled a
45、t temperatures of 60 C 1 C and 120 C 1 C. 5.3 Wash bottle, made of a borosilicate glass, of inside diameter 55 mm and insert, with a graduation line at 250 ml, as illustrated in Figure 1. 5.4 Titration vessel, consisting of a borosilicate glass three-necked flask as shown in Figure 2, fitted with in
46、serts as shown in Figures 1, 3 and 4. Figure 4 is illustrative only, as the design will depend upon the Karl Fischer detection system used for the final analysis. 5.5 Cooling vessel, consisting of a Dewar flask or similar, of sufficient capacity to hold the titration vessel (5.4) surrounded by cooli
47、ng medium (4.4), and with access to allow the addition of solid carbon dioxide (4.3). A temperature-controlled bath containing cooling medium at 77 C 3 C is suitable. 5.6 Vacuum source, a pump or other source of vacuum, capable of maintaining an absolute pressure of 0,3 kPa to 0,65 kPa for a minimum
48、 period of 90 min. 5.7 Analytical balance, of minimum capacity 500 g, capable of weighing to the nearest 0,01 g. 5.8 Flowmeter, capable of reading the nitrogen flow of 3 l/h 0,3 l/h. EN ISO 20764:2003IS:46702 O3002(E) I SO 3002 All irhgts seredevr 3Dimensions in millimetres Key 1 nitrogen in 10 fill
49、ing tube 2 test portion 11 ground-glass sockets/cones 3 two-way cock B 12 0,1 to 0,2 bore tube 4 vacuum capillary 13 methanol connection 5 one-way cocks A, C, D and E 14 Karl Fischer solution connection 6 graduation line at 250 ml 15 Karl Fischer detector connection 7 heating bath 16 vacuum pump connection 8 riser tube 17 titration vessel 9 graduated wash bottle Figure 1 Layout of apparatus EN ISO 20764:2003IS:46702 O3002(E) 4 I SO 3002 All irhgts seredevrD
