Title ISO 12141-2024 - NSC 26-TC 8.pdf ✅

Stationary source emissions — Determination of low range mass concentration of dust — Manual gravimetric method Émissions de sources fixes — Détermination de faibles concentrations en masse de poussières — Méthode gravimétrique manuelle International Standard ISO 12141 Second edition 2024-09 Reference number ISO 12141:2024(en) © ISO 2024 Licensed to NSC 26/TC 8. For reference use only; Date 11/10/2024. Single user licence only, copying and networking prohibited.
ii ISO 12141:2024(en) © ISO 2024 – All rights reserved COPYRIGHT PROTECTED DOCUMENT © ISO 2024 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of the requester. ISO copyright office CP 401 • Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland Licensed to NSC 26/TC 8. For reference use only; Date 11/10/2024. Single user licence only, copying and networking prohibited.
ISO 12141:2024(en) Foreword......................................................................................................................................................................................................................................................v Introduction...........................................................................................................................................................................................................................................vi 1 Scope............................................................................................................................................................................................................................................. 1 2 Normative references................................................................................................................................................................................................. 1 3 Terms and definitions................................................................................................................................................................................................ 1 4 Symbols and abbreviations .................................................................................................................................................................................. 5 4.1 Symbols......................................................................................................................................................................................................................5 4.2 Abbreviations .......................................................................................................................................................................................................5 5 Principle.................................................................................................................................................................................................................................... 6 6 Measurement planning and sampling strategy.............................................................................................................................. 6 6.1 Measurement planning ................................................................................................................................................................................6 6.2 Sampling strategy.............................................................................................................................................................................................7 6.2.1 General.....................................................................................................................................................................................................7 6.2.2 Measurement section and measurement plane...................................................................................................7 6.2.3 Minimum number and location of measurement points .............................................................................7 6.2.4 Measurement ports and working platform.............................................................................................................7 7 Equipment and materials ....................................................................................................................................................................................... 8 7.1 Gas velocity, temperature, pressure and composition measurement devices ...........................................8 7.2 Sampling equipment.......................................................................................................................................................................................8 7.2.1 Sampling system..............................................................................................................................................................................8 7.2.2 Filtration device...............................................................................................................................................................................8 7.2.3 Entry nozzle..................................................................................................................................................................................... 12 7.2.4 Suction tube for out-stack filtration devices ...................................................................................................... 12 7.2.5 Suction unit...................................................................................................................................................................................... 12 7.2.6 Gas metering devices............................................................................................................................................................... 12 7.3 Dust deposit recovery accessories..................................................................................................................................................14 7.4 Equipment for conditioning and weighing ..............................................................................................................................14 8 Weighing procedure..................................................................................................................................................................................................14 8.1 General.....................................................................................................................................................................................................................14 8.2 Pre-sampling conditioning ....................................................................................................................................................................14 8.3 Weighing ............................................................................................................................................................................................................... 15 8.4 Post-sampling treatment of weighed parts............................................................................................................................ 15 8.5 Post-sampling treatment of the rinsing solutions.............................................................................................................16 8.6 Improvement of the weighing procedure.................................................................................................................................16 9 Sampling procedure..................................................................................................................................................................................................16 9.1 Preparation..........................................................................................................................................................................................................16 9.2 Filter handling...................................................................................................................................................................................................17 9.3 Pre-measurements........................................................................................................................................................................................17 9.4 Leak test.................................................................................................................................................................................................................18 9.5 Sampling.................................................................................................................................................................................................................18 9.6 Recovery of deposits upstream of the filter...........................................................................................................................19 9.6.1 General..................................................................................................................................................................................................19 9.6.2 Rinsing procedure...................................................................................................................................................................... 20 9.7 Field blank........................................................................................................................................................................................................... 20 10 Calculation...........................................................................................................................................................................................................................20 10.1 Sampling volumetric flow rate.......................................................................................................................................................... 20 10.2 Dust concentration .......................................................................................................................................................................................21 11 Measurement report.................................................................................................................................................................................................21 Annex A (informative) Performance characteristics of the method obtained in the method validation..............................................................................................................................................................................................................................23 iii © ISO 2024 – All rights reserved Contents Page Licensed to NSC 26/TC 8. For reference use only; Date 11/10/2024. Single user licence only, copying and networking prohibited.