ISO INTERNATIONAL STANDARD 6964 Second edition 2019-02 Polyolefin pipes and fittings Determination of carbon black content by calcination and pyrolysis Test method Tubes et raccords en polyolefines - Détermination de la teneur en noir de carbone par calcination et pyrolyse - Méthode d'essai Reference number IS0 6964:2019(E) so @ IS0 2019 IS0 6964:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2019 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: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 6964:2019(E) Contents Page Foreword ..iv 1 Scope 2 Normative references ..1 3 Principle 4 Method A: Electrical tube furnace .2 4.1 Reagents. 2 4.2 Apparatus. 2 4.3 Procedure 22 4.3.1 Test conditions 4.3.2 Sampling. 2 4.3.3 Conditioning 2 4.3.4 Silica sample boat preparation for the test 2 4.3.5 Test portion. 3 4.3.6 Determination .3 4.4 Calculation and expression of results (Method A) ..3 5 Method B1 or B2: Muffle furnace (conventional B1) or (microwave B2) .4 5.1 Apparatus. ..4 5.2 Procedure .4 5.2.1 Test conditions. ..4 5.2.2 Conditioning 4 5.2.3 Sampling. 5.2.4 Crucible preparation for the test 4 5.2.5 Test portion. ..5 5.2.6 Determination .5 5.3 Calculation and expression of results (Method B1 and B2) .6 6 Method C: Thermogravimetric analyzer (TGA) .6 6.1 Apparatus. .6 6.2 Procedure .6 6.2.1 Conditioning .6 6.2.2 Sampling. .6 6.2.3 Test portion 6.2.4 Temperature scanning program 7 6.2.5 Gas-flow rate 6.2.6 Determination. 7 6.3 Calculation and expression of results (Method C) 7 7 Test report 8 @ IS0 2019 - All rights reserved iii