1、BSI Standards PublicationBS EN ISO 17829:2015Solid biofuels Determinationof length and diameter ofpelletsBS EN ISO 17829:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO17829:2015. It supersedes BS EN 16127:2012 which is withdrawn.The UK participation in
2、 its preparation was entrusted to TechnicalCommittee PTI/17, Solid biofuels.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctap
3、plication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 81422 8ICS 27.190; 75.160.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strat
4、egy Committee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17829 November 2015 ICS 27.190; 75.160.10 Supersedes EN 16127:2012English Version Solid biofuels - Determination of length and diameter
5、 of pellets (ISO 17829:2015) Biocombustibles solides - Dtermination de la longueur et du diamtre des granuls (ISO 17829:2015) Biogene Festbrennstoffe - Bestimmung der Lnge und des Durchmessers von Pellets (ISO 17829:2015) This European Standard was approved by CEN on 5 September 2015. CEN members ar
6、e 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 on application to
7、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-CENELEC Management Ce
8、ntre 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, Italy, Latvia, Lithua
9、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-10
10、00 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17829:2015 EBS EN ISO 17829:2015EN ISO 17829:2015 (E) 3 European foreword This document (EN ISO 17829:2015) has been prepared by Technical Committee ISO/TC 238 “S
11、olid 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 endorsement, at the latest by May 2016, and conflict
12、ing national standards shall be withdrawn at the latest by May 2016. 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 identifying any or all such patent rights. This document sup
13、ersedes EN 16127:2012. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europ
14、ean 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, Slovakia, Slov
15、enia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 17829:2015 has been approved by CEN as EN ISO 17829:2015 without any modification. BS EN ISO 17829:2015ISO 17829:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definiti
16、ons . 14 Principle 15 Apparatus . 26 Sample preparation . 27 Procedure. 37.1 Determination of pellet diameter class 37.2 Measuring of individual pellet length . 37.3 Determination share of oversize length of pellets . 37.3.1 Weighing . 37.3.2 Sorting by length 37.3.3 Weighing of fractions by length
17、38 Calculation 48.1 Pellet diameter class 48.2 Share of oversize pellets . 48.3 Average pellet length . 49 Performance characteristics 410 Test report . 4 ISO 2015 All rights reserved iiiContents PageBS EN ISO 17829:2015ISO 17829:2015(E)ForewordISO (the International Organization for Standardization
18、) 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 to be repr
19、esented 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 used to deve
20、lop 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 of the ISO
21、/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 identified during t
22、he 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 explanation on the meaning
23、of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 238, Sol
24、id biofuels.iv ISO 2015 All rights reservedBS EN ISO 17829:2015ISO 17829:2015(E)IntroductionPellets with a length and diameter outside the specification can cause problems with transportation in screw conveyors, silo outlets, and burner feeding systems. ISO 17225-1, ISO 17225-2, ISO 17225-6, and ISO
25、 17225-8 stipulate dimensions of pellets. This International Standard describes procedures for determination the diameter classification according to ISO 17225-2 as well as the length and diameter of pellets. ISO 2015 All rights reserved vBS EN ISO 17829:2015BS EN ISO 17829:2015Solid Biofuels Determ
26、ination of length and diameter of pellets1 ScopeThis International Standard specifies the methods for the determination of diameter and length of pellets. Concerning the pellet length methods for both determination of the proportion of oversized pellets and for determination of the average length ar
27、e included.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 undated references, the latest edition of the referenced document (including
28、 any amendments) applies.ISO 16559, Solid biofuels Terminology, definitions and descriptionsISO 17225-1, Solid biofuels Fuel specifications and classes Part 1: General requirementsISO 17225-2, Solid biofuels Fuel specifications and classes Part 2: Graded wood pelletsISO 17225-6, Solid biofuels Fuel
29、specifications and classes Part 6: Graded non-woody pelletsISO 17225-81), Solid biofuels Fuel specifications and classes Part 8: Thermally treated and densified biomass fuelsEN 14778:2011, Solid biofuels SamplingEN 14780:2011, Solid biofuels Sample preparationISO 188462), Solid Biofuels Determinatio
30、n of fines content in quantities of pelletsISO 3310-2, Test sieves Technical requirements and testing Part 2: Test sieves of perforated metal plate3 Terms and definitionsFor the purpose of this document, the following terms and definitions given in ISO 16559 apply3.1test sampleoriginal sample sent t
31、o the laboratory for analysis3.2test portionsample extracted from the test sample and used during the analysis4 PrincipleThe length and diameter of fuel pellets of a representative test sample shall be measured by means of a caliper. The length of a pellet shall be measured along the axis of the cyl
32、inder. The diameter shall be measured perpendicular to the axis (see Figures 1 and 2).1) In preparation.2) To be published.INTERNATIONAL STANDARD ISO 17829:2015(E) ISO 2015 All rights reserved 1BS EN ISO 17829:2015ISO 17829:2015(E)KeyD diameter of a pelletL length of a pelletFigure 1 Length and diam
33、eter of a pelletFigure 2 Measuring the length between the mid-point of the convex and concave cross section of a pellet by means of a caliper.5 Apparatus5.1 Measuring caliper, shall have a resolution of at least 0,1 mm for measuring length and diameter.5.2 Balance, shall be capable of reading to the
34、 nearest 0,01 g.5.3 Sieve, shall have round holes of a diameter at 3,15 mm in accordance with ISO 3310-2.6 Sample preparationThe test sample for determination of length and diameter shall be obtained in accordance with EN 14778 and a test portion shall be extracted in accordance with EN 14780. The t
35、est sample shall be divided into two test portions, one consisting of 10 pellets and the other consisting of a minimum mass in accordance with Table 1. The pellets shall be randomly selected.2 ISO 2015 All rights reservedBS EN ISO 17829:2015ISO 17829:2015(E)Table 1 Test portion sizePellet size class
36、 Estimated minimum test portion6 mm 30 g - 40 g8 mm 40 g - 50 g10 mm 50 g - 70 g12 mm 70 g - 120 g25 mm 0 g - 500 g (minimum 50 pellets)Both test portions shall be sieved in accordance with ISO 18846 using a sieve with punched round holes 3,15 mm in diameter in accordance with ISO 3310-2.NOTE Rough
37、handling during sample reduction and sieving could alter the surface of the pellets and thereby influence the result.7 Procedure7.1 Determination of pellet diameter classIn order to determine the diameter class for the test portion with 10 pellets, the diameter of each pellet shall be measured by me
38、ans of a caliper (see 5.1). Record the result of each measurement. The average of the diameter measurements closest to the class defined in ISO 17225-2 determines the pellet diameter class.7.2 Measuring of individual pellet lengthMeasure the length in mm of each pellet in the test portion with 40 -
39、50 pellets (see Clause 6) by means of a caliper (see 5.1). Record the result of each measurement.7.3 Determination share of oversize length of pellets7.3.1 WeighingDetermine the mass of the sieved test portion with 40 - 50 pellets by weighing to the nearest 0,01 g.7.3.2 Sorting by lengthSeparate all
40、 pellets in the test portion with 40 - 50 pellets by means of a caliper (see 5.1) all pellets longer than the maximum length specified by ISO 17225-1, ISO 17225-2, ISO 17225-6, and ISO 17225-8.NOTE Depending on the quality requirements, there can be more than one pellet length to be considered when
41、sorting. Example: Concerning a D08 wood pellet, ISO 17225-2, Table 1 specifies 3,15 mm L 40 mm. Comment c in ISO 17225-2, Table 1 states:“Amount of pellets longer than 40 mm can be 1 w-%. Maximum length shall be 45 mm. Pellets are longer than 3,15 mm, if they stay on a round-hole sieve of 3,15 mm. (
42、For the) amount of pellets shorter than 10 mm, (the) w-% (is) recommended to be stated”.7.3.3 Weighing of fractions by lengthWeigh the mass of the pellets separated in 7.3.2 to the nearest 0,01 g and record the result. ISO 2015 All rights reserved 3BS EN ISO 17829:2015ISO 17829:2015(E)8 Calculation8
43、.1 Pellet diameter classCalculate the mean value and the standard deviation of the recorded pellets diameters class as determined in 7.1 and express the results to the nearest 0,1 mm.In case the test portion contains pellets of different diameter classes (e.g. a mixture of D06 and D08), the average
44、and the standard deviation of the pellet diameter for each of the classes shall be calculated separately and reported as a percent share of the number of measured pellets.8.2 Share of oversize pelletsCalculate the w-% of oversize pellets by dividing the weight of the oversize pellets by length as es
45、tablished in 7.3.3 by the weight of the test portion as established in 7.3.1 and multiply by 100. Report the number of pellets above maximum dimension by length as specified in ISO 17225-1, ISO 17225-2, ISO 17225-6 or ISO 17225-8.8.3 Average pellet lengthCalculate the mean value and the standard dev
46、iation of the recorded pellet lengths as determined in 7.2 and express the result to the nearest 0,1 mm.9 Performance characteristicsBecause of the varying nature of the pellets covered by this document it is not possible to give a precision statement (repeatability or reproducibility) for this test
47、 method.10 Test reportThe test report shall include at least the following information:a) identification of the laboratory performing the test and the date of the test;b) identification of the product (sample) tested;c) a reference to this International Standard, i.e. ISO 17829;d) mean value and sta
48、ndard deviation of the pellet length as per 8.3;e) mean value and standard deviation of the diameter for each of the class(es) (see 7.1) and each class reported in percentage share of the total number of measured pelletsf) w-% of pellets longer than 40 mm as specified in ISO 17225-1, ISO 17225-2, IS
49、O 17225-6 and ISO 17225-8 (see 7.3.2);g) number of pellets longer than the maximum length specified in ISO 17225-1, ISO 17225-2, ISO 17225-6 and ISO 17225-8 (see 7.3.2);h) any unusual features noted during the determination, which may affect the result;i) any operation not included in this International Standard, or regarded as optional.4 ISO 2015 All rights reservedBS EN ISO 17829:2015This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Sta
