1、BSI Standards PublicationBS EN 15051-2:2013Workplace exposure Measurement of the dustinessof bulk materialsPart 2: Rotating drum methodCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS
2、-,-,-BS EN 15051-2:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 15051-2:2013.Together with BS EN 15051-1:2013 and BS EN 15051-3:2013 itsupersedes BS EN 15051:2006, which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommi
3、ttee EH/2/2, Work place atmospheres.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 correctapplication. The British Standards Institu
4、tion 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 76565 0ICS 13.040.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2013.Amendments iss
5、ued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15051-2:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15051-2 November 201
6、3 ICS 13.040.30 Supersedes EN 15051:2006English Version Workplace exposure - Measurement of the dustiness of bulk materials - Part 2: Rotating drum method Exposition sur les lieux de travail - Mesurage du pouvoir de resuspension des matriaux pulvrulents en vrac - Partie 2: Mthode du tambour rotatif
7、Exposition am Arbeitsplatz - Messung des Staubungsverhaltens von Schttgtern - Teil 2: Verfahren mit rotierender Trommel This European Standard was approved by CEN on 28 September 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
8、 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. This European Standard exists in three offici
9、al 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 members are the national standards bodies of A
10、ustria, 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, Slovenia, Spain, Sw
11、eden, 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 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for
12、CEN national Members. Ref. No. EN 15051-2:2013: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15051-2:2013EN 15051-2:2013 (E) 2 Contents Page Foreword 3 Introduction .4
13、1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Requirements .5 4.1 General 5 4.2 Condition of the bulk material 6 4.3 Sample and environmental control 6 4.4 Moisture content 6 4.5 Bulk density 6 4.6 Test procedure .6 4.7 Replicate tests 6 4.8 Reporting 6 5 Rotating drum method 6 5.1
14、 Description of test apparatus .6 5.2 Particle size-selective foams 8 5.3 Filters 8 5.4 Ancillary equipment 8 5.5 Preparation of test sample 8 5.6 Preparation of test apparatus .8 5.7 Running the test apparatus 9 5.8 Weighing the foams and filters 9 5.9 Determination of the inhalable, thoracic and r
15、espirable dustiness mass fractions 10 6 Evaluation of dustiness . 10 7 Test report . 11 Bibliography . 12 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15051-2:2013EN 150
16、51-2:2013 (E) 3 Foreword This document (EN 15051-2:2013) has been prepared by Technical Committee CEN/TC 137 “Assessment of workplace exposure to chemical and biological agents”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either
17、by publication of an identical text or by endorsement, at the latest by May 2014, and conflicting national standards shall be withdrawn at the latest by May 2014. 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
18、shall not be held responsible for identifying any or all such patent rights. This document, together with EN 15051-1:2013 and EN 15051-3:2013, supersedes EN 15051:2006. The major technical changes between this European Standard and the previous edition are as follows: a) EN 15051:2006 has been split
19、 in three parts (see below); b) the test methods given are no longer referred as reference test methods; c) the test of equivalence between an alternative (candidate) test method and any of the test methods now given in this European Standard and in EN 15051-3:2013 has been deleted. EN 15051 Workpla
20、ce exposure Measurement of the dustiness of bulk materials consists of the following parts: Part 1: Requirements and choice of test methods; Part 2: Rotating drum method; Part 3: Continuous drop method. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the fo
21、llowing countries are bound to implement 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
22、, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15051-2:
23、2013EN 15051-2:2013 (E) 4 Introduction This European Standard gives details of the design and operation of the rotating drum test method that classifies the dustiness of solid bulk materials, in terms of health-related fractions. A dustiness classification is presented to provide users (e.g. manufac
24、turers, producers, occupational hygienists and workers) with information on the potential for dust emissions when the bulk material is handled or processed in workplaces. It provides the manufacturers of bulk materials with information that can help to improve their products. It allows the users of
25、the bulk materials to assess the effects of pre-treatments, and also to select less dusty products, if available. It is envisaged that different branches of industry might develop their own classification schemes using experimentally determined dustiness values of the bulk materials of interest. Alt
26、hough this European Standard does not discuss the analysis of dust released from bulk materials (except in terms of health-related fractions), the test method produces samples with the potential for chemical analysis of the contents. This European Standard was developed based on the results of the E
27、uropean project SMT4-CT96-2074 “Development of a Method for Dustiness Testing” (see 1). This project investigated the dustiness of 12 bulk materials, with the intention to test as wide a range of bulk materials as possible, i.e. magnitude of dustiness, industrial sectors, chemical composition and pa
28、rticle size distribution. Meanwhile the method has been applied to investigate the dustiness values of more than 220 different bulk materials. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license
29、from IHS-,-,-BS EN 15051-2:2013EN 15051-2:2013 (E) 5 1 Scope This European Standard specifies the rotating drum test apparatus and associated test method for the reproducible production of dust from a bulk material under standard conditions, and the measurement of the inhalable, thoracic and respira
30、ble fractions of this dust, with reference to existing European Standards, where relevant (see Clause 6). This method is suitable for general bulk material handling processes, including all those processes where the bulk material is dropped, or can be dropped. It differs from the continuous drop met
31、hod presented in EN 15051-3 in this European Standard, the same bulk material is repeatedly dropped, while in EN 15051-3, the bulk material is dropped only once, but continuously. Furthermore, this European Standard specifies the environmental conditions, the sample handling and analytical procedure
32、s, and the method of calculating and presenting the results. A classification scheme for dustiness is specified, to provide a standardised way to express and communicate the results to users of the bulk materials. This European Standard is applicable to powdered, granular or pelletised bulk material
33、s. A standard sample volume is used. This European Standard is not applicable to test the dust released when solid bulk materials are mechanically reduced (e.g. cut, crushed) or to evaluate handling procedures for the bulk materials. 2 Normative references The following documents, in whole or in par
34、t, 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 any amendments) applies. EN 1540, Workplace exposure - Terminology EN 15051
35、-1:2013, Workplace exposure - Measurement of the dustiness of bulk materials - Part 1: Requirements and choice of test methods EN 22768-1, General tolerances - Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1) ISO 15767, Workplace atmospheres
36、- Controlling and characterizing uncertainty in weighing collected aerosols 3 Terms and definitions For the purpose of this document, the terms and definitions given in EN 1540 and EN 15051-1 apply. NOTE In particular, the following terms of EN 1540 are used in this document: airborne dust, collecte
37、d sample, dustiness, inhalable fraction, respirable fraction, thoracic fraction and health related fractions. 4 Requirements 4.1 General The test procedures described in EN 15051-1:2013, Clause 5 shall be applied. Copyright European Committee for Standardization Provided by IHS under license with CE
38、NNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15051-2:2013EN 15051-2:2013 (E) 6 4.2 Condition of the bulk material The bulk material shall be delivered in air-tight containers and shall be tested in the state in which it was received (moisture content, par
39、ticle size distribution, etc.). 4.3 Sample and environmental control Bulk materials that have a large specific surface area are sensitive to environmental conditions such as relative humidity, temperature and electrostatic effects. Additionally, the bulk materials moisture content, compaction, agglo
40、meration etc. will have an influence on the results of the dustiness measurements. Therefore, for accurate results the test atmosphere shall be within a narrow range of temperature and humidity. In all cases the environmental conditions shall be documented. The following test conditions shall apply:
41、 relative humidity (RH): (50 10) %; temperature: (21 3) C; The test apparatus shall be electrically grounded. NOTE In many cases, a separate determination of the particle size can be valuable. 4.4 Moisture content The moisture content of the bulk material shall be determined and documented according
42、 to the procedure given in EN 15051-1:2013, 5.4 and Annex A. 4.5 Bulk density The bulk density of the test material shall be determined and documented according to the procedure given in EN 15051-1:2013, Annex B. 4.6 Test procedure The dustiness shall be tested according to the rotating drum test me
43、thod described in Clause 5. 4.7 Replicate tests Replicate tests shall be carried out according to 5.7. 4.8 Reporting The test results shall be reported as specified in Clause 7. 5 Rotating drum method 5.1 Description of test apparatus The test apparatus required to determine the dustiness of bulk ma
44、terials is shown in Figure 1. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 15051-2:2013EN 15051-2:2013 (E) 7 Dimensions in millimetres Key 1 air flow 2 inlet stage (prot
45、ective filter) 3 dust generation section - rotating drum 4 outlet stage/dust sampling system (two particle size-selective foam stages and a back-up filter) 5 rollers 6 in-line mass flow meter 7 control valve 8 vacuum pump 9 timer (timing control circuit) 10 drive motor General tolerances according t
46、o EN 22768-1 Figure 1 null Outline of the rotating drum test apparatus The test apparatus comprises a 300 mm diameter stainless steel drum rotating at 4 min1, equipped with eight longitudinal vanes to lift and let fall a known volume of the bulk material under test (the dust generation section (3),
47、and a three-stage dust sampling system (the outlet stage (4) through which the emitted dust cloud is drawn by a vacuum pump (8) at a flow rate of 38 l min1for the duration of the test. The stainless steel vanes of 230 mm length and 25 mm height are fixed longitudinally to the internal walls of the d
48、rum and point radially inwards towards the centre of the drum. The test apparatus shall be earthed. The dust sampling system (4) comprises two particle size-selective foam stages in series followed by a back-up filter. Polytetrafluorethylene (PTFE) spacer rings of size 80 mm diameter and 2 mm thickn
49、ess are used to separate the two foam stages and the back-up filter to prevent cross contamination. Dust entering the conical passage and into the sampling system gives an estimate of the inhalable fraction. The size selectors, in the form of cylindrical plugs of 800 pores per metre (20 pores per inch) and 3 200 pores per met
