1、July 2014 Translation by DIN-Sprachendienst.English price group 10No 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 7
2、5.160.20!%7?“2202892www.din.deDDIN EN 12662Liquid petroleum products Determination of total contamination in middle distillates, diesel fuelsand fatty acid methyl esters;English version EN 12662:2014,English translation of DIN EN 12662:2014-07Flssige Minerallerzeugnisse Bestimmung der Gesamtverschmu
3、tzung in Mitteldestillaten, Dieselkraftstoff undFettsure-Methylestern;Englische Fassung EN 12662:2014,Englische bersetzung von DIN EN 12662:2014-07Produits ptroliers liquides Dtermination de la contamination totale des distillats moyens, des gazoles et des estersmthyliques dacides gras;Version angla
4、ise EN 12662:2014,Traduction anglaise de DIN EN 12662:2014-07SupersedesDIN EN 12662:2008-07www.beuth.deDocument comprises 14 pagesIn case of doubt, the German-language original shall be considered authoritative.06.14DIN EN 12662:2014-07 2 A comma is used as the decimal marker. National foreword This
5、 document (EN 12662:2014) has been prepared by Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin” (Secretariat: NEN, Netherlands). The responsible German body involved in its preparation was the Normenausschuss Mate
6、rialprfung (Materials Testing Standards Committee), Working Committee NA 062-06-32 AA Gasfrmige und flssige Kraft- und Brennstoffe, Schmierstoffe und verwandte Produkte mit minerallstmmiger, synthetischer oder biologischer Herkunft of the Fachausschuss Minerall- und Brennstoffnormung. The DIN Standa
7、rd corresponding to the International Standard referred to in this document is as follows: ISO 3819 DIN 12331 Amendments This standard differs from DIN EN 12662:2008-07 as follows: a) the scope has been extended to include diesel fuels; b) the applicability of the method has been restricted to conta
8、minations ranging from about 12 mg/kg to about 30 mg/kg; c) the preparation of the test portion for neat FAME has been revised; d) the precision statement has been revised. Previous editions DIN 51419: 1983-06 DIN EN 12662: 1998-10, 2008-07 National Annex NA (informative) Bibliography DIN 12331, Lab
9、oratory glassware Beakers EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12662 February 2014 ICS 75.160.20 Supersedes EN 12662:2008English Version Liquid petroleum products - Determination of total contamination in middle distillates, diesel fuels and fatty acid methyl esters Produits ptrolier
10、s liquides - Dtermination de la contamination totale des distillats moyens, des gazoles et des esters mthyliques dacides gras Flssige Minerallerzeugnisse - Bestimmung der Gesamtverschmutzung in Mitteldestillaten, Dieselkraftstoff und Fettsure-Methylestern This European Standard was approved by CEN o
11、n 13 December 2013. 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 such national standards
12、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 own language and notifie
13、d 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, Greece, Hungary, Icela
14、nd, 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 NORMUNG CEN-CENELEC Manage
15、ment Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12662:2014 EEN 12662:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle
16、5 5 Reagents and materials 5 6 Equipment 5 7 Cleansing of sample containers and filtration apparatus .6 8 Sampling .7 9 Preparation of the test portion .7 10 Preparation of the equipment .9 11 Procedure .9 12 Calculation . 10 13 Expression of results . 10 14 Precision 10 15 Test report . 11 Bibliogr
17、aphy . 12 DIN EN 12662:2014-07 EN 12662:2014 (E) 3 Foreword This document (EN 12662:2014) 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 of which is held by NEN. This Europe
18、an Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2014, and conflicting national standards shall be withdrawn at the latest by August 2014. Attention is drawn to the possibility that some of the element
19、s of this document 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 12662:2008. The significant technical changes between this European Standard and the previous edition are: extension of
20、the scope to middle distillates, diesel fuels containing up to 30 % (V/V) fatty acid methyl ester (FAME) and neat FAME; update of the working range and precision statement based on interlaboratory study with field samples carried out in 2011 within CEN/TC 19; inclusion of a dilution procedure for th
21、e determination of total contamination of neat FAME; improved description of the filtration procedure and equipment. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bul
22、garia, 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, T
23、urkey and the United Kingdom. DIN EN 12662:2014-07 EN 12662:2014 (E) 4 1 Scope This European Standard specifies a method for the determination of the content of undissolved substances, referred to as total contamination, in middle distillates, in diesel fuels containing up to 30 % (V/V) fatty acid m
24、ethyl esters (FAME), and in neat FAME. The working range is from 12 mg/kg to 30 mg/kg and it was established in an interlaboratory study by applying EN ISO 4259 1. This European Standard in general applies to products having a kinematic viscosity not exceeding 8 mm2/s at 20 C, or 5 mm2/s at 40 C, e.
25、g. diesel fuel as specified in EN 590 2 and FAME as in EN 14214 3. This test method may be used for diesel fuels containing more than 30 % (V/V) FAME and for petroleum products having a kinematic viscosity exceeding 8 mm2/s at 20 C, or 5 mm2/s at 40 C, however in such cases the precision of the test
26、 method has not been defined. NOTE 1 Excessive contamination in a fuel system can give rise to premature blocking of filters and/or hardware failure, and is therefore undesirable. NOTE 2 For the purposes of this European Standard, the term “% (V/V)” is used to represent the volume fraction, , of a m
27、aterial. WARNING Use of this standard may involve hazardous 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 the user of this standard to establish appropriate safety and health practices an
28、d to determine the applicability of regulatory limitations prior to use. 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 refer
29、ences, the latest edition of the referenced document (including any amendments) applies. EN 14275, Automotive fuels Assessment of petrol and diesel fuel quality Sampling from retail site pumps and commercial site fuel dispensers EN ISO 3170, Petroleum liquids Manual sampling (ISO 3170) EN ISO 3171,
30、Petroleum liquids Automatic pipeline sampling (ISO 3171) ISO 3819, Laboratory glassware Beakers 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 total contamination undissolved substances retained on a filter after filtration under test condit
31、ions 3.2 absolute pressure pressure measured relative to zero pressure or a total vacuum DIN EN 12662:2014-07 EN 12662:2014 (E) 5 4 Principle A sample portion is weighed and filtered under vacuum through a pre-weighed filter. In the case of neat FAME and liquid petroleum products having a kinematic
32、viscosity exceeding 8 mm2/s at 20 C, or 5 mm2/s at 40 C, the weighed sample portion is diluted with a solvent before filtration. The filter with the residue is washed, dried and weighed. Contamination is calculated from the difference in mass of the filter and expressed relative to the sample mass a
33、s mg/kg. 5 Reagents and materials 5.1 Heptane, with a purity no less than 99,0 % (V/V), filtered using a membrane filter (6.18). NOTE Heptane used as a reference fuel in EN ISO 5164 4 is suitable. 5.2 Xylene, analytical grade, filtered using a membrane filter (6.18). 5.3 Propan-2-ol, with a purity n
34、o less than 99,0 % (V/V). NOTE Propan-2-ol is used to dry glassware and the sample container after rinsing with water. 5.4 Solvent, add 750 ml heptane (5.1) and 250 ml xylene (5.2) to a 1 l glass bottle (6.5) and mix thoroughly. 6 Equipment All glassware and sample containers shall be carefully clea
35、ned as described in Clause 7. Usual laboratory apparatus and glassware, together with the following: 6.1 Filtration apparatus, suitable for a filter (6.2), as shown in Figure 1. A different filtration apparatus may be used if it is suitable to take the filters given in 6.2. 6.2 Filters, of high rete
36、ntion glass fibre type, 47 mm in diameter and with a 0,7 m mean pore size. NOTE Glass fibre filters Whatman GF-F type have been found suitable for total contamination measurements. This information is given for the convenience of users of this European Standard and does not constitute an endorsement
37、 by CEN of this product. 6.3 Beakers, tall form 0,5 l and 1 l, conforming with ISO 3819 or an equivalent national standard. 6.4 Cylinders, 500 ml and 1 000 ml graduated cylinders. 6.5 Glass bottles, 0,5 l and 1 l, with screw caps. 6.6 Oven, of the static type (without fan assisted circulation), expl
38、osion-proof, capable of heating to (110 5) C. 6.7 Desiccator, containing freshly activated silica gel (or equivalent desiccant) with a moisture content indicator. 6.8 Glass Petri dishes with covers, greater than 50 mm in diameter. 6.9 Analytical balance, capable of weighing to the nearest 0,1 mg. 6.
39、10 Forceps, with round shaped tips for transferring the filter from the filter holder to the Petri dish and from the latter on to the dish of the analytical balance. 6.11 Water bath or oven, capable of maintaining the following temperatures: (40 1) C and (60 1) C. DIN EN 12662:2014-07 EN 12662:2014
40、(E) 6 6.12 Wash bottle, fitted with spray nozzle, suitable for use with heptane (5.1). 6.13 Top load balance, capable of weighing 1 500 g to the nearest 0,1 g. 6.14 Vacuum source, capable of maintaining an absolute pressure of 2 kPa to 5 kPa inside the filtration apparatus (see Figure 1). NOTE The v
41、acuum range excludes the use of a water vacuum pump. 6.15 Suitable clean sample containers. 6.16 Stopwatch, capable of measuring 30 min 1 min. 6.17 Clean plastic film or aluminium foil. 6.18 Filter, membrane with a mean pore size of 0,45 m. Key 1 wire to ground 4 filter holder 7 safety flask 2 clamp
42、 5 receiving flask 8 vacuometer 3 funnel 6 vacuum tubing 9 to vacuum pump Figure 1 Filtration apparatus for determining contamination 7 Cleansing of sample containers and filtration apparatus IMPORTANT Due to the extremely low levels of material being measured, it is essential that this testing is p
43、erformed in a clean environment to minimize the possibility of contamination. 7.1 Clean strictly, in the manner described in 7.2 to 7.7, all the surfaces of all components of the sample containers and parts of the apparatus that are: a) likely to come into contact with the sample or heptane (5.1), o
44、r b) capable of transferring extraneous matter to the filter. DIN EN 12662:2014-07 EN 12662:2014 (E) 7 7.2 Wash with warm tap water containing water soluble detergent. 7.3 Rinse thoroughly with warm tap water. 7.4 Rinse thoroughly with water, handling container caps externally only with clean labora
45、tory tongs or gloves during this and subsequent washings. 7.5 Rinse thoroughly with propan-2-ol (5.3). 7.6 Rinse thoroughly with heptane (5.1). 7.7 Cover the top of the sample container and the funnel opening of the assembled filtration apparatus (6.1) with clean plastic film or aluminium foil (6.17
46、) previously rinsed with heptane (5.1) and air-dried. 8 Sampling 8.1 Unless otherwise specified, obtain samples in accordance with the requirements of EN ISO 3170, EN ISO 3171, EN 14275, or an equivalent national standard. 8.2 The preferred procedure is to take samples dynamically from a sampling lo
47、op in a distribution line or from the flushing line of an automatic pipeline sampling device in accordance with the principles specified in EN ISO 3171. Ensure that the line to sampler is flushed with fuel before taking the sample. 8.3 If samples are taken manually the samples shall be taken directl
48、y into the sample container (6.15). 8.4 Where it is only possible to obtain samples from static storage follow the procedures given in EN ISO 3170, ensuring that the final sample has not passed through intermediate containers prior to placement in the prepared container. 8.5 Glass containers shall b
49、e used to take and store the samples. These containers should be cleaned according to Clause 7. Glass is used in order to facilitate the visual surveillance of the sample homogenisation before subsequent analysis. Ensure that the samples receive the minimum exposure to light. Use either brown glass containers or shield the samples from light during transportation and storage. To facilitate sampling from refuelling nozzles, wide necked bottles should be used. 8.6 Fill the sample container to between 80 %
