1、BRITISH STANDARD BS EN ISO 20844:2004 Petroleum and related products Determination of the shear stability of polymer-containing oils using a diesel injector nozzle The European Standard EN ISO 20844:2004 has the status of a British Standard ICS 75.080 BS EN ISO 20844:2004 This British Standard was p
2、ublished under the authority of the Standards Policy and Strategy Committee on 26 April 2004 BSI 26 April 2004 ISBN 0 580 43675 6 National foreword This British Standard is the official English language version of EN ISO 20844:2004. It is identical with ISO 20844:2004. The UK participation in its pr
3、eparation 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. Cross-references The British Standards which implement international or Europe
4、an publications referred to in this document may be found in the 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
5、 the necessary provisions of a contract. Users are responsible for 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
6、 the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the
7、 ISO title page, pages ii to iv, pages 1 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO20844 March2004 ICS75.080 Eng
8、lishversion PetroleumandrelatedproductsDeterminationoftheshear stabilityofpolymercontainingoilsusingadieselinjectornozzle (ISO20844:2004) PtroleetproduitsconnexesDterminationdelastabilit aucisaillementdefluidescontenantdespolymresau moyenduninjecteurpourmoteurdiesel(ISO20844:2004) Minerallerzeugniss
9、eundverwandteProdukte BestimmungderScherstabilittvonpolymerhaltigenlen mitHilfeeinerDieselEinspritzdse(ISO20844:2004) ThisEuropeanStandardwasapprovedbyCENon1March2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusof
10、anationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation under
11、theresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembou
12、rg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansre
13、served worldwideforCENnationalMembers. Ref.No.ENISO20844:2004EINESO02:4482004(E) 2 Foreword Thisdocument(ENISO20844:2004)hasbeenpreparedbyTechnicalCommitteeISO/TC28 “Petroleumproductsandlubricants“incollaborationwithTechnicalCommitteeCEN/TC19 “Petroleumproducts,lubricantsandrelatedproducts“,thesecre
14、tariatofwhichisheldbyNEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbySeptember2004,andconflictingnational standardsshallbewithdrawnatthelatestbySeptember2004. AccordingtotheCEN/CENELECInternalRegulations,thenationals
15、tandardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium, Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary, Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland, Portugal,Slovakia,Slovenia,Spain,Sweden
16、,SwitzerlandandUnitedKingdom. Endorsementnotice ThetextofISO20844:2004hasbeenapprovedbyCENasENISO20844:2004withoutany modifications. ENISO20844:2004 Reference number ISO 20844:2004(E) OSI 4002INTERNATIONAL STANDARD ISO 20844 First edition 2004-03-15 Petroleum and related products Determination of th
17、e shear stability of polymer-containing oils using a diesel injector nozzle Ptrole et produits connexes Dtermination de la stabilit au cisaillement de fluides contenant des polymres au moyen dun injecteur pour moteur diesel ENISO20844:2004IS:44802 O4002(E) DPlcsid Fremia ihTs PDF file mya ctnoian em
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22、 saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o groii ISO 4002 Allr ithgsr esedevrENISO20844:2004IS:44802 O4002(E) I SO 4002 All irthgs ersedevr iiiContents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Terms and defin
23、itions. 1 4 Principle . 2 5 Reagents and materials 2 6 Apparatus. 2 7 Samples and sampling . 3 8 Preparation of test rig. 3 9 Calibration 3 10 Procedure. 4 11 Calculation. 4 12 Expression of results 4 13 Precision 5 14 Test report 5 Annex A (normative) Test rig 6 Bibliography . 9 ENISO20844:2004IS:4
24、4802 O4002(E) iv I SO 4002 All irthgs ersedevrForeword ISO (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 mem
25、ber 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-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International El
26、ectrotechnical Commission (IEC) on all matters of electrotechnical standardization. International 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 ado
27、pted 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 a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of pat
28、ent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20844 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants. ENISO20844:2004INTENRATIONAL TSANDADR IS:44802 O4002(E)I SO 4002 All irthgs ersedevr 1Petroleum and related product
29、s Determination of the shear stability of polymer-containing oils using a diesel injector nozzle 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 wit
30、h 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 a method to assess the resistance to shear stresse
31、s applied to mineral oils, synthetic oils and other fluids containing polymers, when passed through a specified diesel injector nozzle. The shear stability is measured by the change in viscosity of the fluid under test, brought about by the polymer degradation during stress. Under normal circumstanc
32、es, this International Standard is applied to hydraulic fluids of categories HR and HV as defined in ISO 6743-4 (1 in the Bibliography) and specified in ISO 11158 (2 in the Bibliography), but it may also be applied to fire-resistant hydraulic fluids within categories HFA, HFB, HFC and HFD, with modi
33、fied conditions as specified in ISO 12922 (3 in the Bibliography). No formal correlation has been established between the viscosity loss, or the absence of viscosity loss, obtained using the procedures described in this International Standard and that of oils and fluids in actual service. However, i
34、t provides standardized conditions for the evaluation of polymer stability under minimized thermal and oxidative stresses. It is normally used by manufacturers of fluids and additives, and users, as a means of ranking existing and potential formulations. NOTE Changes to properties other than viscosi
35、ty are specified in some specifications, but these are not covered by the procedures specified in this International Standard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For u
36、ndated references, the latest edition of the referenced document (including any amendments) applies. ISO 3104:1994, Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosity ISO 3170:2004, Petroleum liquids Manual sampling 3 Terms and
37、 definitions For the purposes of this document, the following terms and definitions apply. ENISO20844:2004IS:44802 O4002(E) 2 I SO 4002 All irthgs ersedevr3.1 shear stability percentage loss in viscosity at 40 C of an oil or fluid subjected to the mechanical shear stresses specified in this Internat
38、ional Standard NOTE Viscosity measurements at other temperatures may be specified by some users. 3.2 calibration pressure recorded gauge pressure when the specified calibration fluid is within a viscosity loss range of 2,7 mm 2 /s to 3,0 mm 2 /s at 100 C 4 Principle A test portion of the oil or flui
39、d under test is pumped through a diesel injector nozzle by means of a diesel fuel pump, at high pressure to exert shear stresses. After a specified number of passes, the viscosity of the stressed oil or fluid is measured and compared to that of the unstressed oil or fluid. The percentage loss in vis
40、cosity, corrected by a factor to account for the calibration procedure, is the shear stability of the material under test. 5 Reagents and materials 5.1 Calibration fluid, of calibration oil grade RL 34 1) . 5.2 Diesel fuel, of commercial grade, if required for adjustment of the injector nozzle valve
41、 opening pressure (see 8.1). NOTE Precalibrated injector nozzles are normally used. 6 Apparatus 6.1 Test rig The test rig is described in Annex A 2) . It shall be located in a position where the ambient temperature is between 20 C and 25 C, and shall be supplied with a supply of circulating cooling
42、water regulated for flow. 6.2 Viscosity measuring apparatus Viscometers and baths shall conform to ISO 3104. Bath temperatures of at least 40 C and 100 C are required. 1) Reference oil RL 34 may be obtained from Kraft-und Schmierstofftechnik, 6702 Bad Durkheim, Bruchstr 24, Germany. This information
43、 is given for the convenience of users of this International Standard and does not constitute an endorsement by ISO of this product. 2) Test rig components may be obtained from HEA-HMB Elektro-Apparate GmbH, Eidelstedter Weg 255 A, D-25469 Halstenbek, Holstein, Germany. This information is given for
44、 the convenience of users of this International Standard and does not constitute an endorsement by ISO of these products. ENISO20844:2004IS:44802 O4002(E) I SO 4002 All irthgs ersedevr 37 Samples and sampling 7.1 Unless otherwise specified, samples shall be taken in accordance with the procedures sp
45、ecified in ISO 3170 or an equivalent national standard. 7.2 Laboratory samples shall be of a minimum volume of 600 ml, and shall be clear of undissolved water and particulate, which may damage the injector nozzle. Filtration, or removal by centrifuge is allowable. 8 Preparation of test rig 8.1 If a
46、new uncalibrated nozzle is to be used, adjust the diesel injector nozzle, using diesel fuel (5.2) and a nozzle tester, so that the opening pressure under static conditions is 17,5 MPa. If a precalibrated nozzle is used, set the opening pressure to that specified, which shall be between 17,0 MPa and
47、18,0 MPa. 8.2 Adjust the connecting pipe between the lower reservoir and the pump so that the dead volume between the stopcock and the outlet of the nozzle is 20 ml 0,5 ml. 8.3 Connect the cooling water to the cooling vessel and carry out three flushing runs with the material to be tested. Carry out
48、 the first two flushing runs with approximately 50 ml of fluid, and the third with approximately 170 ml. Once the test rig has warmed up during the flushing runs, adjust the cooling water rate to give a constant temperature of between 30 C and 35 C in the fluid in the lower reservoir. 8.4 During the third flushing run, and after a min
