ISO INTERNATIONAL STANDARD 20915 First edition 2018-11 Life cycle inventory calculation methodology for steel products Méthodologie de calcul de I'inventaire du cycle de vie des produits enacier Reference number IS0 20915:2018(E) so @IS02018 IS0 20915:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 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: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 20915:2018(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope 2 Normative references 3 Terms and definitions 4 Basic conditions for LCI of steel products .3 4.1 General requirements .3 4.2 Function and functional unit. .3 4.3 System boundary 4 4.4 Data quality. .5 4.4.1 General. .5 4.4.2 Time-related coverage .5 4.4.3 Geographical coverage .5 4.4.4 Technology coverage. .5 4.4.5 Sources of the data. .5 4.4.6 Cut-off criteria. .5 5 Methodological procedure for LcI calculation of steel products with provision for scrap recycling .6 5.1 General .6 5.2 Calculation of cradle to gate LCI without allocation for scrap input 5.3 Allocation for scrap recycling. ..8 5.3.1 General 5.3.2 LCI calculation methodology for scrap. ..8 5.3.3 Calculation of the burden for scrap input to produce the specific steel product under study .8 5.3.4 Calculation of the credits for scrap recovery .9 5.4 Collecting data. 9 5.4.1 General. .9 5.4.2 Co-products .9 5.4.3 Ferrous raw materials .10 5.4.4 Process coal ..11 5.4.5 Non-ferrous raw materials. .11 5.4.6 Ferroalloy. 11 5.4.7 Other input materials .11 5.4.8 Fuels. .11 5.4.9 Process gases ..11 5.4.10 Electricity .12 5.4.11 Steam, .12 5.4.12 Sea water .12 5.4.13 Fresh water. ..12 5.4.14 Industrial gases. ..12 5.4.15 Emissions to air, water and soil ..12 5.4.16 Flares. ..12 5.4.17 Transportation. .13 5.5 Allocation procedure for co-products. ..13 5.5.1 General requirement. ..13 5.5.2 System expansion. ..13 6 Reporting. .13 7 Critical review ..14 Annex A (informative) An example for calculating Xpr ..15 Annex B (informative) Example of LCI result reporting ..17 @ IS0 2018 - All rights reserved iii