1、July 2017 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 75.160.20!%gu_“2688260www.din.deDIN
2、 EN ISO 6246Petroleum products Gum content of fuels Jet evaporation method (ISO 6246:2017);English version EN ISO 6246:2017,English translation of DIN EN ISO 6246:2017-07Minerallerzeugnisse Abdampfrckstand von Kraftstoffen Aufblaseverfahren (ISO 6246:2017);Englische Fassung EN ISO 6246:2017,Englisch
3、e bersetzung von DIN EN ISO 6246:2017-07Produits ptroliers Teneur en gommes des carburants Mthode dvaporation au jet (ISO 6246:2017);Version anglaise EN ISO 6246:2017,Traduction anglaise de DIN EN ISO 6246:2017-07SupersedesDIN EN ISO 6246:199802www.beuth.deDocument comprises 19 pagesDTranslation by
4、DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.06.17 DIN EN ISO 6246:2017-07 2 A comma is used as the decimal marker. National foreword This document (EN ISO 6246:2017) has been prepared by Technical Committee ISO/TC 28 “Petroleum and related prod
5、ucts, fuels and lubricants from natural or synthetic sources” in collaboration with 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 pre
6、paration was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-06-42 AA “Testing of liquid fuels and fuel oils” of Section “Standardization of Petroleum, Fuels, Lubricants and Related Products”. The DIN Standards corresponding to the Internation
7、al Standards referred to in this document are as follows: ISO 3170 DIN EN ISO 3170 ISO 3171 DIN EN ISO 3171 ISO 3696 DIN ISO 3696 ISO 4259 DIN EN ISO 4259 ISO 4788 DIN EN ISO 4788 Amendments This standard differs from DIN EN ISO 6246:1998-02 as follows: a) in the Scope, modern gasoline (blends) have
8、 been included; b) normative references have been updated; c) in 6.4 “Evaporation bath”, a warning notice has been included; d) information in Clause 12 has been rendered more precise; e) the precision data has been updated on the basis of ASTM interlaboratory tests; Figure 2, Figure 3 and Figure 4
9、have been deleted; f) the standard has been editorially revised. Previous editions DIN 51753: 1952-05 DIN 51795: 1959-11 DIN 51776: 1955-02, 1959x-01, 1963-02, 1972-11 DIN EN 5: 1975-08 DIN EN 26246: 1993-12 DIN EN ISO 6246: 1998-02 DIN EN ISO 6246:2017-07 3 National Annex NA (informative) Bibliogra
10、phy DIN EN ISO 3170, Petroleum liquids Manual sampling DIN EN ISO 3171, Petroleum liquids Automatic pipeline sampling DIN EN ISO 4259, Petroleum products Determination and application of precision data in relation to methods of test DIN EN ISO 4788, Laboratory glassware Graduated measuring cylinders
11、 DIN ISO 3696, Water for analytical laboratory use Specification and test methods DIN EN ISO 6246:2017-07 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6246 April 2017 ICS 75.160.20 Supersedes EN ISO 6246:1997English Version Petroleum products - Gum cont
12、ent of fuels - Jet evaporation method (ISO 6246:2017) Produits ptroliers - Teneur en gommes des carburants - Mthode dvaporation au jet(ISO 6246:2017) Minerallerzeugnisse - Abdampfrckstand von Kraftstoffen - Aufblaseverfahren (ISO 6246:2017) This European Standard was approved by CEN on 9 February 20
13、17. 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 may be obtained
14、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 notified to the CEN-CEN
15、ELEC 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, Iceland, Ireland, Ita
16、ly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Cen
17、tre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6246:2017 EEuropean foreword .3Introduction 51 Scope . 62 Normative references 63 Terms and definitions . 64 Principle 75 Reagents 76 A
18、pparatus . 77 Assembly of air-jet apparatus . 88 Assembly of steam-jet apparatus 99 Calibration . 1010 Samples and sampling . 1011 Procedure 1012 Calculation of gum content . 1213 Expression of results . 1313.1 Aviation fuels . 1313.2 Non-aviation fuels . 1313.3 All fuel types . 1314 Precision 1314.
19、1 General 1314.2 Repeatability, r .1314.3 Reproducibility, R 1415 Test report 14Bibliography .15Contents PageDIN EN ISO 6246:2017-07 EN ISO 6246:2017 (E) 2Foreword .4European foreword This document (EN ISO 6246:2017) has been prepared by Technical Committee ISO/TC 28 ” Petroleum and related products
20、, fuels and lubricants from natural or synthetic sources” 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 be given the s
21、tatus of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2017, and conflicting national standards shall be withdrawn at the latest by October 2017. Attention is drawn to the possibility that some of the elements of this document may be the
22、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 6246:1997. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to impleme
23、nt 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, S
24、erbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 6246:2017 has been approved by CEN as EN ISO 6246:2017 without any modification. DIN EN ISO 6246:2017-07 EN ISO 6246:2017 (E)3 ForewordISO (the International Organization for Stan
25、dardization) 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 member body interested in a subject for which a technical committee has been established has the right
26、 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures u
27、sed 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 criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules
28、 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 subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights ident
29、ified 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 name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanatio
30、n on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/
31、 foreword .html.This document was prepared by ISO/TC 28, Petroleum products and related products of synthetic or biological origin.This third edition cancels and replaces the second edition (ISO 6246:1995), which has been technically revised and aligned with ASTM D3811.It also incorporates the Techn
32、ical Corrigendum ISO 6246:1995/Cor 1:1998.The changes incorporate modern methods for temperature measurement and clarification of various measurement limits. Some process steps on the rounding of results are added. The precision in the former edition was based on very old data using samples that did
33、 not contain components found in modern gasoline, such as oxygenated compounds and deposit control additives. New precision estimates from a 1997 joint ASTM/EI study3are included. Unwashed and washed gum results for non-aviation fuels can now be expressed to the nearest 0,5 mg/100 ml. This study and
34、 additional work in ASTM4and CEN in 20145have led to broadening of the scope to modern gasoline (blends).DIN EN ISO 6246:2017-07 EN ISO 6246:2017 (E) 4 IntroductionThe true significance of this test method for determining gum in motor gasoline is not firmly established. It has been proven that high
35、gum content can cause induction-system deposits and sticking of intake valves, and in most cases, it can be assumed that low gum content will ensure absence of induction-system difficulties. The user should, however, realize that the test is not of itself correlative to induction-system deposits.The
36、 primary purpose of the test, as applied to motor gasoline, is the measurement of the oxidation products formed in the sample prior to or during the comparatively mild conditions of the test procedure. Since many kinds of motor gasoline are purposely blended with non-volatile oils or additives, the
37、heptane extraction step is necessary to remove these from the evaporation residue so that the deleterious material, gum, can be determined. With respect to aviation turbine fuels, large quantities of gum are indicative of contamination of fuel by higher boiling oils or particulate matter and general
38、ly reflect poor handling practices in distribution downstream of the refinery.DIN EN ISO 6246:2017-07 EN ISO 6246:2017 (E)5 WARNING The use of this document can involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with
39、 its use. It is the responsibility of users of this document to take appropriate measures to ensure the safety and health of personnel prior to application of the document, and fulfil statutory and regulatory requirements for this purpose.1 ScopeThis document specifies a method for determining the e
40、xistent gum content of aviation fuels and the gum content of motor gasoline or other volatile distillates. It includes the determination of products containing ethanol (up to a volume fraction of 85 %) and ether-type oxygenates and deposit control additives.For determination of gum content in automo
41、tive ethanol (E85) fuel, no precision data is available (see 14.1).For non-aviation fuels, a procedure for the determination of the heptane-insoluble portion of the residue is also described.CAUTION This method is not intended for the testing of gasoline components, particularly those with a high pe
42、rcentage of low-boiling unsaturated compounds, as they can cause explosions during evaporation.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition c
43、ited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3170, Petroleum liquids Manual samplingISO 3171, Petroleum liquids Automatic pipeline samplingISO 3696, Water for analytical laboratory use Specification and test methodsISO 425
44、9, Petroleum products Determination and application of precision data in relation to methods of testISO 4788, Laboratory glassware Graduated measuring cylindersASTM E2251-14, Standard specification for liquid-in-glass ASTM thermometers with low-hazard precision liquidsBS 2000, IP standard thermomete
45、rs3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ DIN EN ISO 6246:2017-07 EN ISO
46、6246:2017 (E) 6 ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1existent gumevaporation residue (3.2) of aviation fuels without any further treatment3.2evaporation residuematerial that remains after controlled heating under a flow of air or steam3.3unwashed gum contentnon-
47、aviation fuel evaporation residue (3.2) of the product under test without any further treatment3.4solvent-washed gum contentnon-aviation fuel residue remaining after the evaporation residue (3.2) has been washed with heptane and the washings discarded4 PrincipleA measured test portion of fuel is eva
48、porated under controlled conditions of temperature and flow of air or steam. The resulting residue is weighed and may be subject to further treatment by solvent washing and further weighing.5 ReagentsDuring the analysis, unless otherwise stated, use reagents of recognized analytical grade. Water, where specified, shall be of a quality equivalent to grade 3 of ISO 3696.5.1 Heptane, CH3(CH2)5CH3, of minimum 99,7 % purity.5
