1、February 2017 English price group 9No 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 75.160.20!%anl“2627573www.din.de
2、DIN EN 16896Petroleum products and related products Determination of kinematic viscosity Method by Stabinger type viscosimeter;English version EN 16896:2016,English translation of DIN EN 16896:2017-02Minerallerzeugnisse und verwandte Produkte Bestimmung der kinematischen Viskositt Verfahren mit dem
3、Viskosimeter nach dem StabingerPrinzip;Englische Fassung EN 16896:2016,Englische bersetzung von DIN EN 16896:2017-02Produits ptroliers et produits relats Dtermination de la viscosit cinmatique Mthode par Viscometer Stabinger;Version anglaise EN 16896:2016,Traduction anglaise de DIN EN 16896:2017-02w
4、ww.beuth.deDocument comprises 13 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.02.17 DIN EN 16896:2017-02 2 A comma is used as the decimal marker. National foreword This document (EN 16896:2016) has been prepared by Technical
5、 Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin” (Secretariat: NEN, Netherlands). This document has been prepared by DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-
6、06-32-01 UA Prfung von FAME of Working Committee NA 062-06-32 AA Anforderungen an flssige Kraftstoffe. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16896 November 2016 ICS 75.160.20 English Version Petroleum products and related products - Determination of kinematic viscosity - Method by Sta
7、binger type viscosimeter Produits ptroliers et produits relats - Dtermination de la viscosit cinmatique - Mthode par Viscometer Stabinger Minerallerzeugnisse und verwandte Produkte - Bestimmung der kinematischen Viskositt - Verfahren mit dem Viskosimeter nach dem Stabinger-Prinzip This European Stan
8、dard was approved by CEN on 27 August 2016. 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-date lists and bibliographical references concerning
9、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 under the responsibility of a CEN member into its
10、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, Former Yugoslav Republic of Macedonia, France, Germany
11、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NO
12、RMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16896:2016 EEN 16896:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Te
13、rms and definitions . 4 4 Principle . 5 5 Reagents and materials . 5 6 Apparatus . 6 7 Sampling and sample handling 7 7.1 Sampling . 7 7.2 Sample handling 7 8 Calibration and verification 7 8.1 General 7 8.2 Verification of calibration 7 9 Apparatus preparation . 8 10 Procedure. 8 10.1 Filling and c
14、leaning 8 10.2 Manual filling and cleaning using syringes 8 10.3 Manual filling using sample displacement . 9 10.4 Automatic filling and cleaning by a sample changer 9 11 Calculation 10 12 Expression of results . 10 13 Precision 10 13.1 General . 10 13.2 Repeatability, r 10 13.3 Reproducibility, R 1
15、0 14 Test report 10 Bibliography . 11 DIN EN 16896:2017-02 EN 16896:2016 (E) 3 European foreword This document (EN 16896:2016) has been prepared by Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin”, the secretariat
16、 of which is held by NEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2017, and conflicting national standards shall be withdrawn at the latest by May 2017. Attention is drawn to the possi
17、bility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to impl
18、ement 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, Netherlands, Norway, Poland, Portugal, Romania
19、, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 16896:2017-02 EN 16896:2016 (E) 4 1 Scope This European Standard specifies a procedure for the determination of kinematic viscosity () at 40 C in the range from 2 mm2/s to 6 mm2/s by calculation from dynamic visc
20、osity () and density () of middle distillate fuels, fatty acid methyl ester fuels (FAME) and mixtures of these using the Stabinger-type viscosimeter. The result obtained using the procedure described in this standard depends on the behaviour of the sample. This European Standard should be used predo
21、minantly on liquids whose shear stress and shear rate are proportional (Newtonian flow behaviour). However, if the viscosity changes significantly with the shear rate, comparison with other measuring methods is only permissible at similar shear rates. WARNING The use of this Standard can involve haz
22、ardous materials, operations and equipment. This Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of users of this standard to take appropriate measures to ensure the safety and health of personnel prior to the application of the Stand
23、ard, and fulfil statutory and regulatory requirements for this purpose. 2 Normative references The 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 undated refere
24、nces, the latest edition of the referenced document (including any amendments) applies. EN ISO 3104, Petroleum products - Transparent and opaque liquids - Determination of kinematic viscosity and calculation of dynamic viscosity (ISO 3104) EN ISO 3170, Petroleum liquids - Manual sampling (ISO 3170)
25、EN ISO 3171, Petroleum liquids - Automatic pipeline sampling (ISO 3171) EN ISO 12185, Crude petroleum and petroleum products - Determination of density - Oscillating U-tube method (ISO 12185) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 dy
26、namic viscosity ratio of the applied shear stress to the resulting shear rate of a liquid 3.2 kinematic viscosity ratio of the dynamic viscosity to the density of a liquid at the same temperature and pressure Note 1 to entry: The kinematic viscosity is a measure of a liquids resistance to flow under
27、 gravity. 3.3 density mass of a substance divided by its volume at a given temperature DIN EN 16896:2017-02 EN 16896:2016 (E) 5 3.4 determinability d quantitative measure of the variability associated with the same operator in a given laboratory, obtaining successive determined values using the same
28、 apparatus for a series of operations leading to a single result, defined as the difference between two such single determined values 4 Principle A test portion of a sample is introduced into the measuring cells, which are at closely controlled and known temperature. The measuring cells consist of a
29、 pair of rotating concentric cylinders and an oscillating U-tube. The dynamic viscosity is determined from the equilibrium rotational speed of the inner cylinder under the influence of the shear stress of the test specimen and an eddy current brake in conjunction with adjustment data. The density is
30、 determined by the oscillation frequency of the U-tube in conjunction with adjustment data. The kinematic viscosity is calculated by dividing the dynamic viscosity by the density. 5 Reagents and materials 5.1 Cleaning solvent, able to remove the sample from the measuring cell after the measurement a
31、nd be completely miscible with all constituents of the sample. 5.2 Drying solvent, highly volatile and miscible with the cleaning solvent, shall be filtered before use and of an appropriate purity so that it does not leave any residues in the instrument. NOTE 1 A separate drying solvent is not neede
32、d if the cleaning solvent also meets the requirements of the drying solvent. NOTE 2 Commercially available volatile petroleum spirit or cleaners naphtha of technical grade or better has proven suitable. 5.3 Compressed air, oil-free and filtered with a dew point considerably lower than the lowest mea
33、suring cell temperature at which the instrument should be dried. The pressure should be limited to 100 kPa. Instead of compressed air it is also possible to use inert gases, e.g. technical nitrogen. The requirements given for compressed air are also valid here. 5.4 Certified reference liquids for vi
34、scosity and density, identical to the reference standards referenced in EN ISO 3104 and EN ISO 12185 respectively. 5.5 Reference thermometer and probe, for verification of the temperature calibration. The measuring uncertainty of the reference thermometer including the probe shall not exceed 0,01 C.
35、 The resolution shall be at least 0,001 C. The probe used for the calibration (with an adapter if necessary) shall have a shape which fits the geometry of the viscosity cell. The probe replaces the measuring system (tube and measuring rotor). DIN EN 16896:2017-02 EN 16896:2016 (E) 6 6 Apparatus Usua
36、l laboratory apparatus and glassware, together with the following: 6.1 Stabinger type viscosimeter 6.1.1 Viscosity measurement The Stabinger type viscosimeter, a concentric rotating viscosimeter contains an outer rotor with an inner rotor (see Figure 1). The small concentric gap between these rotors
37、 is filled with sample. The outer rotor is driven at constant speed which makes the inner rotor rotating due to the samples viscosity. The lightweight inner rotor is centred in the heavier sample due to the centrifugal forces. The equilibrated speed ratio is depending on the driving viscous shear fo
38、rce and the opposing magnetic induction force (eddy current). The dynamic viscosity is a function of the equilibrated speed ratio and adjustment constants. The kinematic viscosity is obtained by dividing the measured dynamic viscosity by the measured density. 6.1.2 Density measurement The Stabinger
39、type viscosimeter has an integrated density measurement based on the oscillating U-tube principle. The sample filled U-tube is oscillated and the instrument calculates the density from the measured natural frequency of the filled tube using adjustment factors. The viscosity-dependent error of this p
40、rocedure is corrected using the measured viscosity value. Key 1 outer rotor (constant speed) 3 sample fluid 2 inner rotor (measured speed) 4 magnet Figure 1 Viscosity cell 6.1.3 Temperature control The Stabinger type viscosimeter has an integrated temperature control which keeps the viscosity and de
41、nsity measurement at the same temperature. Using Peltier elements, a highly conductive measuring cell block which surrounds the measuring cells is set to the target temperature with a stability of 0,005 C. The measurement uncertainty of the temperature sensor shall be within 0,03C at 40 C. DIN EN 16
42、896:2017-02 EN 16896:2016 (E) 7 6.1.4 Stability The instrument automatically ensures the temperature equilibration of the sample by checking the stability of the continuously recorded viscosity and density values by limiting the maximum fluctuation range to 0,07 % for the dynamic viscosity and of 0,
43、03 kg/m3for the density within 60 s. 7 Sampling and sample handling 7.1 Sampling Samples shall be taken as described in EN ISO 3170 or EN ISO 3171 and/or in accordance with the requirements of national standards or regulations for the sampling of petroleum products. 7.2 Sample handling For waxy or o
44、ther samples with high pour point, before drawing the test specimen, heat the sample to the desired temperature, which shall be high enough to dissolve the wax crystals. 8 Calibration and verification 8.1 General The calibration shall be verified periodically using certified reference standards as d
45、escribed in 5.4. Due to the measuring range of the viscosity and temperature, more than one calibration fluid can be required. If a reference liquid gives no reference value or if the given reference value is not sufficiently precise for one of the two parameters (viscosity or density) e.g. a densit
46、y standard without viscosity values, the affected parameter shall be verified with another suitable reference liquid. Verify the calibration of the temperature measurement periodically by using a reference thermometer as described in 5.5. The recommended interval to verify viscosity and density cali
47、bration is once a month, for temperature control once a year. 8.2 Verification of calibration Ensure that the instrument is leak tight and the measuring cells have been cleaned and dried before verification of the calibration is undertaken. The verification of the calibration should be carried out a
48、ccording to the instrument manufacturers instructions. If, despite the correct condition of the instrument, the measured viscosity does not correspond to the certified value with a deviation of less than 0,35 % then the viscosity measurement shall be adjusted according to the instrument manufacturer
49、s instructions. If, despite the correct condition of the instrument, the measured density does not correspond to the certified value with a deviation of less than 0,001 g/cm3then the density measurement shall be adjusted according to the instrument manufacturers instructions. If, despite the correct condition of the instrument, the measured temperature does not correspond to the certified value with a deviation of less than 0,03 C then the tem
