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 75.080g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, T
3、ue Apr 25 03:25:02 BST 2006, Uncontrolled Copy, (c) BSIBS EN ISO 20764:2003This British 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 lan
4、guage version of EN ISO 20764:2003. It is identical with ISO 20764:2003.The UK participation 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 re
5、quest to its secretary.The Energy Institute, under the brand of IP publishes and sells 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 Sta
6、ndard 2000 parts” and individually.Further information is available from:Energy Institute, 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
7、 BSI Catalogue under the section entitled “International Standards Correspondence Index”, 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 fo
8、r its correct application.Compliance with a British Standard does not of itself confer 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 inte
9、rests informed; monitor related international and European developments and promulgate 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 A
10、nnex ZA page, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date Comments16065 January 2006 Correction to numbering of standardLicensed Copy: Wang Bin, na, Tue Apr 25 0
11、3:25:02 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 20764October 2003ICS 75.080English versionPetroleum and related products - Preparation of a test portion ofhigh-boiling liquids for the determination of water content -Nitrogen purge method (ISO 20764:2
12、003)Ptrole et produits connexes - Prparation dune prisedessai de liquides haut point dbullition en vue dudosage de leau - Mthode par purge lazote (ISO20764:2003)Minerallerzeugnisse und verwandte Produkte -Herstellung eines Probenteiles von hochsiedendenFlssigkeiten fr die Bestimmung des Wassergehalt
13、es -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 Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alt
14、eration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translat
15、ionunder 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 national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland,
16、Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation
17、 in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 20764:2003 ELicensed Copy: Wang Bin, na, Tue Apr 25 03:25:02 BST 2006, Uncontrolled Copy, (c) BSII NESO 02:4672003 (E)2ForewordThis document (EN ISO 20764:2003) has been prepared by Technical Committee ISO/TC 28
18、“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, either by publication ofan identical text or
19、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 implement this European Standard: Austria, Belg
20、ium, 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 been approved by CEN as EN ISO 20764:2003 with
21、out anymodifications.NOTE Normative references to International Standards are listed in Annex ZA (normative).EN ISO 20764:2003Licensed Copy: Wang Bin, na, Tue Apr 25 03:25:02 BST 2006, Uncontrolled Copy, (c) BSIReference numberISO 20764:2003(E)OSI 3002INTERNATIONAL STANDARD ISO20764First edition2003
22、-10-15Petroleum and related products Preparation 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 2
23、0764:2003Licensed Copy: Wang Bin, na, Tue Apr 25 03:25:02 BST 2006, Uncontrolled Copy, (c) BSIIS:46702 O3002(E) DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In ccacnadrow eitA hebods licnesilop gnic,y tihs file mirp eb yatnde iv roweb detu slahl ton ide ebtlnu deess teh typfecaes wih
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28、r edevrEN ISO 20764:2003Licensed Copy: Wang Bin, na, Tue Apr 25 03:25:02 BST 2006, Uncontrolled Copy, (c) BSIIS:46702 O3002(E) I SO 3002 All irhgts seredevr iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies)
29、. 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 represented on that committee. International organizations, governmental and non
30、-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 drafted in accordance with the rules given in the ISO/IEC Directives, Part
31、 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 Standard requires approval by at least 75 % of the member bodies casting
32、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 20764 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants. E
33、N ISO 20764:2003Licensed Copy: Wang Bin, na, Tue Apr 25 03:25:02 BST 2006, Uncontrolled Copy, (c) BSIblankEN ISO 20764:2003Licensed Copy: Wang Bin, na, Tue Apr 25 03:25:02 BST 2006, Uncontrolled Copy, (c) BSIINTENRATIONAL TSANDADR IS:46702 O3002(E)I SO 3002 All irhgts seredevr 1Petroleum and related
34、 products Preparation of a test portion of high-boiling liquids for the determination 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 sa
35、fety problems associated with its use. It is the responsibility of the user of this 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
36、 preparation of test portions from petroleum and related products boiling above 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-b
37、oiling solvents. The test portions generated by these procedures are suitable for 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 a
38、re 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 amendments) applies. ISO 383:1976, Laboratory glassware Interchangeable conical ground joints ISO 3170:1),
39、 Petroleum liquids Manual sampling 3 Principle 3.1 Atmospheric pressure The water 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 so
40、lution is immediately available for the determination of water content by Karl Fischer 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 abs
41、olute pressure of 0,30 kPa to 0,65 kPa. It is collected and titrated in the same manner as the test portion in 3.1. 1) To be published. (Revision of ISO 3170:1988) EN ISO 20764:2003Licensed Copy: Wang Bin, na, Tue Apr 25 03:25:02 BST 2006, Uncontrolled Copy, (c) BSIIS:46702 O3002(E) 2 I SO 3002 All
42、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 gives 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
43、 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 shall be continuously protected by a drying tube containing a suitable drying agent. 4.3 Solid carbon dioxide 4.4 Cooling medium: commerc
44、ial 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 vessel 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 sou
45、rces 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 itself 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
46、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 generally used is “k = 8”. For joints specified in the figures in this International Standard, these result in joints with dimensions of 14,
47、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 at 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 gr
48、aduation 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 inserts as shown in Figures 1, 3 and 4. Figure 4 is illustrative only, as the design will depend upon the Karl Fischer detection system u
49、sed 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 cooling 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 period
