1、December 2015 English price group 11No 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 75.080!%Jw“2398459www.din.deDIN
2、 EN ISO 20844Petroleum and related products Determination of the shear stability of polymer-containing oils using a diesel injector nozzle (ISO 20844:2015);English version EN ISO 20844:2015,English translation of DIN EN ISO 20844:2015-12Minerallerzeugnisse und verwandte Produkte Bestimmung der Scher
3、stabilitt von polymerhaltigen len mit Hilfe einer Diesel-Einspritzdse (ISO 20844:2015);Englische Fassung EN ISO 20844:2015,Englische bersetzung von DIN EN ISO 20844:2015-12Ptrole et produits connexes Dtermination de la stabilit au cisaillement de fluides contenant des polymres au moyen dun injecteur
4、 pour moteur diesel (ISO 20844:2015);Version anglaise EN ISO 20844:2015,Traduction anglaise de DIN EN ISO 20844:2015-12SupersedesDIN EN ISO 20844:2004-07www.beuth.deDocument comprises 18 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered author
5、itative.01.16DIN EN ISO 20844:2015-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 20844:2015) has been prepared by Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin” (Secretariat
6、: NEN, Netherlands). International Standard ISO 20844:2015, on which this document is based, has been prepared by Technical Committee ISO/TC 28 “Petroleum products and related products of synthetic or biological origin (Secretariat: NEN, Niederlande). ”The responsible German body involved in its pre
7、paration was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-06-61 AA Prfung von Schmierlen, sonstigen len und Paraffinen of the Fachausschuss Minerall- und Brennstoffnormung. Attention is drawn to the possibility that some of the elements of
8、this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. The DIN Standards corresponding to the International Standards referred to in Clause 2 of this standard are as follows: ISO 3104 DIN EN ISO 3104 ISO 3170 DIN
9、 EN ISO 3170 ISO 4113 DIN ISO 4113 Amendments This standard differs from DIN EN ISO 20844:2004- 7 as follows: 0a) the standard has been aligned with CEC L-14-93; b) the requirements concerning reagents have been updated as the former reference fluid is no longer available (see Clause 5); c) a requir
10、ement on minimum test volume availability has been introduced (see 7.2); d) the preparation of the test rig has been improved (see Clause 8 and Annex A); e) the referencing has been improved (see Clause 9). Previous editions DIN EN ISO 20844: 2004-07 DIN EN ISO 20844:2015-12 3 National Annex NA (inf
11、ormative) Bibliography DIN EN ISO 3104, Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosity DIN EN ISO 3170, Petroleum liquids Manual sampling DIN ISO 4113, Road vehicles Calibration fluid for diesel injection equipment DIN EN I
12、SO 20844:2015-12 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 20844 September 2015 ICS 75.080 Supersedes EN ISO 20844:2004English Version Petroleum and related products - Determination of the shear stability of polymer-containing oils using a diesel inj
13、ector nozzle (ISO 20844:2015) Ptrole et produits connexes - Dtermination de la stabilit au cisaillement de fluides contenant des polymres au moyen dun injecteur pour moteur diesel (ISO 20844:2015) Minerallerzeugnisse und verwandte Produkte - Bestimmung der Scherstabilitt von polymerhaltigen len mit
14、Hilfe einer Diesel-Einspritzdse This European Standard was approved by CEN on 22 August 2015. 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-dat
15、e lists and bibliographical references concerning 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
16、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 members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Form
17、er Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT E
18、UROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 20844:2015 E(ISO 20844:2015) Foreword .1 Scope .2 Norm
19、ative references 3 Terms and definitions .4 Principle 5 Reagents and materials .6 Apparatus .6.1 Test rig 6.2 Viscosity measuring apparatus .7 Samples and sampling 8 Preparation of test rig .9 Referencing 10 Procedure.11 Calculation 12 Expression of results 13 Precision .13.1 General .13.2 Repeatabi
20、lity .13.3 Reproducibility 14 Test report Annex A (normative) Test rig Bibliography .14Contents PageEuropean foreword . 3 .EN ISO 20844:2015 (E) 2455566666678899999101011DIN EN ISO 20844:2015-12 European foreword This document (EN ISO 20844:2015) has been prepared by Technical Committee ISO/TC 28 Pe
21、troleum products and related products of synthetic or biological origin” in collaboration with Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin” the secretariat of which is held by NEN. This European Standard shall
22、 be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2016, and conflicting national standards shall be withdrawn at the latest by March 2016. Attention is drawn to the possibility that some of the elements of this document
23、may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 20844:2004. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Associa
24、tion. According to the CEN-CENELEC Internal Regulations, the national standards organizations 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, Franc
25、e, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 20844:2015 has been approved by CEN as EN ISO
26、20844:2015 without any modification. EN ISO 20844:2015 (E) 3DIN EN ISO 20844:2015-12 “ForewordISO (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 thr
27、ough 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-governmental, in liaison with ISO, also take part in the work. ISO collabo
28、rates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical 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
29、criteria needed for the different types of ISO documents should be noted. This document was drafted 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 subje
30、ct of patent rights. ISO shall not be held responsible for identifying any or all such patent 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
31、 name used in this document is information given for the convenience of users and does not constitute 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 Tech
32、nical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 28, Petroleum products and related products of synthetic or biological origin.ISO Technical Committee ISO/TC 28 acknowledges permission granted by Co-ordinat
33、ing European Council to reproduce selected parts of CEC Test Method L-14-93.This second edition cancels and replaces the first edition (ISO 20844:2004), which has been technically revised with the following changes: correction of deficiencies of the former standard and alignment with CEC L-14-93 hav
34、e been introduced; the requirements concerning reagents (Clause 5) has been updated as the former reference fluid is no longer available; a requirement on minimum test volume availability (7.2) has been introduced based on field experience; the preparation of the test rig (Clause 8 and Annex A) and
35、subsequently the referencing (Clause 9) have been improved and technically revised.EN ISO 20844:2015 (E) 4DIN EN ISO 20844:2015-12 WARNING The use of this International Standard may involve hazardous materials, operations and equipment. This International Standard does not purport to address all of
36、the safety 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 ScopeThis International Standard specifies a method to assess
37、 the resistance to shear stresses 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
38、 stress. Under normal circumstances, this International Standard is applied to hydraulic fluids of categories HR and HV as defined in ISO 6743-41and specified in ISO 111582, but it may also be applied to fire-resistant hydraulic fluids within categories HFA, HFB, HFC, and HFD, with modified conditio
39、ns as specified in ISO 129223.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, it provides standardized conditions fo
40、r 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 viscosity are specified in some specification
41、s, but these are not covered by the procedures specified in this International Standard.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For
42、 undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3104, Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosityISO 3170, Petroleum liquids Manual samplingISO 4113, Road vehicle
43、s Calibration fluids for diesel injection equipment3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1shear stabilitymechanically-induced viscosity shear loss at 40 C of a fluid, expressed as percentageNote 1 to entry: Viscosity measurements at oth
44、er temperatures may be specified by some users.EN ISO 20844:2015 (E) 5DIN EN ISO 20844:2015-12 3.2referencing pressurerecorded gauge pressure when the shear loss in kinematic viscosity at 100 C of CEC Reference Fluid RL 233 is within the range 2,70 mm2s1to 2,90 mm2s14 PrincipleA test portion of the
45、oil or fluid 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
46、loss in viscosity, corrected by a factor to account for the calibration procedure, is the shear stability of the material under test.5 Reagents and materials5.1 Reference fluid, CEC Reference Fluid RL 2331).5.2 Diesel injection calibration fluid, satisfying the requirements of ISO 4113 for static ad
47、justment of the nozzle opening pressure if required.NOTE Injector nozzles are conventionally supplied in an un-referenced condition.6 Apparatus6.1 Test rigThe test rig is described in Annex A2). It shall be located in a position where the ambient temperature is between 20 C and 25 C, and shall be su
48、pplied with a supply of circulating cooling water regulated for flow.6.2 Viscosity measuring apparatusViscometers and baths shall conform to ISO 3104. Bath temperatures of at least 40 C and 100 C are required.7 Samples and sampling7.1 Unless otherwise specified, samples shall be taken in accordance
49、with the procedures specified in ISO 3170 or an equivalent National standard.7.2 A minimum volume of 600 ml of the sample to be tested shall be available. The sample shall be homogeneous and free from visible foreign matter. Particulate matter, which is detrimental to the durability of the injector nozzle, nozzle holder and pump, can be removed by filtration if necessary.1) The CEC Secretariat should be contacted at CEC Secretariat, Kellen Europe, Avenue Jules Bordet 142 1140 Brussels, Belgium, for further
