DIN EN ISO 18134-2-2017 Solid biofuels - Determination of moisture content - Oven dry method - Part 2 Total moisture - Simplified method (ISO 18134-2 2017) German version EN ISO 18.pdf

1、May 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 75.160.40!%ds“2659680www.din.deDIN EN

2、 ISO 18134-2Solid biofuels Determination of moisture content Oven dry method Part 2: Total moisture Simplified method (ISO 181342:2017);English version EN ISO 181342:2017,English translation of DIN EN ISO 18134-2:2017-05Biogene Festbrennstoffe Bestimmung des Wassergehaltes Ofentrocknung Teil 2: Gesa

3、mtgehalt an Wasser Vereinfachtes Verfahren (ISO 181342:2017);Englische Fassung EN ISO 181342:2017,Englische bersetzung von DIN EN ISO 18134-2:2017-05Biocombustibles solides Dosage de la teneur en humidit Mthode de schage ltuve Partie 2: Humidit totale Mthode simplifie (ISO 181342:2017);Version angla

4、ise EN ISO 181342:2017,Traduction anglaise de DIN EN ISO 18134-2:2017-05SupersedesDIN EN ISO 181342:201512www.beuth.deDocument comprises 13 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.05.17 DIN EN ISO 18134-2:2017-05 2 A co

5、mma is used as the decimal marker. National foreword This document (EN ISO 18134-2:2017) has been prepared by Technical Committee ISO/TC 238 “Solid biofuels” in collaboration with Technical Committee CEN/TC 335 “Solid biofuels” (Secretariat: SIS, Sweden). The responsible German body involved in its

6、preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-05-82 AA “Solid biofuels”. The DIN Standards corresponding to the International Standards referred to in this document are follows: ISO 14780 DIN EN ISO 14780 (Draft) ISO 16559 DI

7、N EN ISO 16559 ISO 16993 DIN EN ISO 16993 ISO 18134-1 DIN EN ISO 18134-1 ISO 18135 DIN EN ISO 18135 (Draft) Amendments This standard differs from DIN EN ISO 18134-2:2015-12 as follows: a) in 3.2 and 3.3, the source has been deleted; b) some subclauses have been reworded; c) the last sentence of 7.2

8、has been deleted; d) in Clause 10, the last two items have been renumbered e) and f); e) the standard has been brought in line with the current rules of presentation. Previous editions DIN CEN/TS 14774-2: 2004-11 DIN EN 14774-2: 2010-04 DIN EN ISO 18134-2: 2015-12 DIN EN ISO 18134-2:2017-05 3 Nation

9、al Annex NA (informative) Bibliography E DIN EN ISO 14780, Solid biofuels Sample preparation DIN EN ISO 16559, Solid biofuels Terminology, definitions and description DIN EN ISO 16993, Solid biofuels Conversion of analytical results from one basis to another DIN EN ISO 18134-1, Solid biofuels Determ

10、ination of moisture content Oven dry method Part 1: Total moisture Reference method E DIN EN ISO 18135, Solid biofuels Sampling DIN EN ISO 18134-2:2017-05 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 18134-2 February 2017 ICS 27.190; 75.160.40 Supersede

11、s EN ISO 18134-2:2015English Version Solid biofuels - Determination of moisture content - Oven dry method - Part 2: Total moisture - Simplified method (ISO 18134-2:2017) Biocombustibles solides - Dosage de la teneur en humidit - Mthode de schage ltuve - Partie 2: Humidit totale - Mthode simplifie(IS

12、O 18134-2:2017) Biogene Festbrennstoffe - Bestimmung des Wassergehaltes - Ofentrocknung - Teil 2: Gesamtgehalt an Wasser - Vereinfachtes Verfahren(ISO 18134-2:2017) This European Standard was approved by CEN on 1 February 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulation

13、s 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 on application to the CEN-CENELEC Management Centre or to any CEN member. Th

14、is 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-CENELEC Management Centre has the same status as the official versions. CEN mem

15、bers 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu

16、gal, 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 Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation i

17、n any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 18134-2:2017 EEuropean foreword .31 Scope . 52 Normative references 53 Terms and definitions . 54 Principle 65 Apparatus . 66 Sample preparation . 66.1 Sample reduction 66.2 Drying of test portion 66.3 Size of t

18、est portion . 77 Procedure. 77.1 Handling of test portion 77.2 Weight of test portion . 78 Calculation 79 Performance characteristics 810 Test report . 8Bibliography 9Contents PageDIN EN ISO 18134-2:2017-05 EN ISO 18134-2:2017 (E)2Foreword .4European foreword This document (EN ISO 18134-2:2017) has

19、been prepared by Technical Committee ISO/TC 238 “Solid biofuels“ in collaboration with Technical Committee CEN/TC 335 “Solid biofuels” the secretariat of which is held by SIS. This European Standard shall be given the status of a national standard, either by publication of an identical text or by en

20、dorsement, at the latest by August 2017, and conflicting national standards shall be withdrawn at the latest by August 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for iden

21、tifying any or all such patent rights. This document supersedes EN ISO 18134-2:2015. 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 Re

22、public, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kin

23、gdom. Endorsement notice The text of ISO 18134-2:2017 has been approved by CEN as EN ISO 18134-2:2017 without any modification. DIN EN ISO 18134-2:2017-05 EN ISO 18134-2:2017 (E) 3 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

24、 (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 to be represented on that committee. International organizations,

25、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 used to develop this document and those intended for its further mai

26、ntenance 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 of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

27、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 identified during the development of the document will be in the Introdu

28、ction 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 explanation on the meaning of ISO specific terms and expressions related to c

29、onformity 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/ foreword .html.The document was prepared by Technical Committee ISO/TC 238, Solid biofuels.This secon

30、d edition cancels and replaces the first edition (ISO 18134-2:2015), of which it constitutes a minor revision with the following changes: the source has been deleted in 3.2 and in 3.3; a few subclauses have been rephrased; the last sentence of 7.2 has been deleted; in Clause 10, the last two items h

31、ave been renumbered e) and f).A list of all parts in the ISO 18134 series can be found on the ISO website.DIN EN ISO 18134-2:2017-05 EN ISO 18134-2:2017 (E)4 1 ScopeThis document describes the method of determining the total moisture content of a test sample of solid biofuels by drying in an oven an

32、d is used when the highest precision is not needed, e.g. for routine production control on site. The method described in ISO 18134 (all parts) is applicable to all solid biofuels. The moisture content of solid biofuels (as received) is always reported based on the total mass of the test sample (wet

33、basis).NOTE The term moisture content, when used with biomass materials, can be misleading since untreated biomass frequently contains varying amounts of volatile compounds (extractives) which might evaporate when determining moisture content by oven drying (see References 1 and 3).2 Normative refer

34、encesThe 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 cited applies. For undated references, the latest edition of the referenced document (including any amendments) a

35、pplies.ISO 147801), Solid biofuels Sample preparationISO 16559, Solid biofuels Terminology, definitions and descriptionsISO 181352), Solid biofuels Sampling3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 16559 and the following apply.ISO and IEC maint

36、ain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1nominal top sizeaperture of the sieve where at least 95 % by mass of the ma

37、terial passesSOURCE: ISO 16559:2014, 4.137, modified.3.2test sampleoriginal sample sent to the laboratory for analysis1) To be published.2) To be published.DIN EN ISO 18134-2:2017-05 EN ISO 18134-2:2017 (E) 5 3.3test portionsample extracted from the test sample (3.2) and used during the analysis4 Pr

38、incipleThe test portion of solid biofuel shall be dried at a temperature of 105 C in air atmosphere until constant mass is achieved and the percentage moisture shall be calculated from the loss in mass of the test portion.The difference with this procedure compared to the reference method ISO 18134-

39、1 is that the effect due to buoyancy is neglected and only a single determination is required. The weight of a tray when still hot is less than the weight of the cold tray due to buoyancy. The magnitude of the buoyancy effect depends of the size and the weight of the tray.5 Apparatus5.1 Drying oven,

40、 capable of being controlled at a temperature within the range of (105 2) C and in which the air atmosphere changes between three to five times per hour. The air velocity shall be such that the test portion particles are not dislodged from their tray.5.2 Dishes and trays, of non-corrodible and heat-

41、resistant material and of such dimension that they will hold the total test portion in the proportion of not exceeding 1 g of material per cm2. The surface of the trays shall be such that the possibility to adsorption/absorption is minimized (very clean and even surface).5.3 Balance, capable of read

42、ing to the nearest 0,1 g.6 Sample preparation6.1 Sample reductionTest samples for the determination of total moisture content shall be obtained in accordance with ISO 18135 and shall be received in the laboratory in sealed air-tight containers or bags. A test portion shall be prepared in accordance

43、with ISO 14780 and the nominal top size reduced to below 31,5 mm.6.2 Drying of test portionThe necessary drying time of the test portion depends, among other things, on the particle size of the test sample material. In order to reduce the necessary drying time, the particle size of the material may

44、be reduced to below 31,5 mm by cutting up the material, provided that the cutting procedure does not change the moisture content of the material. To minimize loss of moisture, the cutting shall be carried out as fast as possible while avoiding air ventilation as much as possible. Visibly wet samples

45、 cannot be cut up without loss of moisture and shall therefore be pre-dried.If the above procedure is not practical, larger test sample sizes and longer drying times shall be used. Deviations from the established procedures shall be documented on the test report.WARNING Dried solid biofuels are hygr

46、oscopic. Precautions shall be taken to ensure that moisture is not lost during preparation of the test portion. Significant losses of moisture from test portion will occur after a few minutes in room atmosphere.DIN EN ISO 18134-2:2017-05 EN ISO 18134-2:2017 (E)6 6.3 Size of test portionThe mass of t

47、he test portion shall have a minimum mass of 300 g.NOTE For fine particulate solid biofuels (e.g. sawdust and fuel powder), the test portion can be reduced to 200 g or 100 g, respectively, if using a balance capable of reading to the nearest 0,01 g.7 Procedure7.1 Handling of test portionWeigh an emp

48、ty and clean drying tray to the nearest 0,1 g.Transfer the test portion from the package (container or bag) in which it is delivered to the empty and clean drying tray and spread the material evenly, not to exceed 1 cm2of surface area per 1 g of material. In case moisture remains on the inside surfaces of the package, shake the package to allow the material to re-absorb the moisture prior to