ISO INTERNATIONAL STANDARD 21138-2 Second edition 2020-01 Plastics piping systems for non- pressure underground drainage and sewerage - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 2: Pipes and fittings with smooth external surface, Type A Systemesdecanalisationsenplastiquepourlesbranchementset les collecteurs d'assainissementsans pression enterrésSystemes de canalisations aparois structurées enpoly(chloruredevinyle)non plastifié (PVC-U),polypropylene (PP) et polyéthylene (PE) Partie 2: Tubes et raccords avec une surface externe lisse, type A Reference number IS021138-2:2020(E) iso @ ISO 2020 IS021138-2:2020(E) COPYRIGHTPROTECTEDDOCUMENT @IS02020 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 below orIso's member body in the country of therequester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland i @IS0 2020 - All rights reserved IS021138-2:2020(E) Contents Page Foreword .V Introduction.. .vi Scope. 1 2 Normative references .1 3 Terms, definitions, symbols and abbreviated terms. .3 3.1 Terms and definitions 3 3.2 Symbols.. .4 3.3 Abbreviated terms 4 4 Material. 5 4.1 General 5 4.2 Unplasticized poly (vinyl chloride) (PVC-U) 5 4.2.1 General. 5 4.2.2 Pipe and fitting material characteristics 5 4.2.3 Utilization of non-virgin materials 5 4.3 Polypropylene (PP) 6 4.3.1 General 6 4.3.2 Pipeand fittingmaterial characteristics 6 4.3.3 Meltmass-flow rate classification 7 .1 4.3.4 Utilization of non-virgin materials 4.4 Polyethylene (PE) 7 4.4.1 General 7 4.4.2 Material characteristics of pipes and injection-moulded fittings 7 4.4.3 Material characteristics of rotational-moulded fittings. .8 4.4.4 Utilization of non-virgin materials. .9 4.5 Sealing ring retaining components. 9 4.6 .9 Sealing rings 4.7 Fused or welded joints 9 4.8 Adhesives for PVC-U. 10 5 Designation of wall construction and examples of typical jointing methods .10 5.1 Wall constructions designated as Type A 10 5.1.1 Multilayer construction or hollow-wall construction with axial hollow sections, Type A1 constructions. 10 5.1.2 Hollow-wallconstruction with spirally or radially formed hollow sections Type A2 constructions. 10 5.1.3 Typical jointing methods for Type A structured-wall pipes 11 5.2 Designation and design of joints.. 11 General characteristics for pipes and fittings - Colour .11 6 7 Geometrical characteristics .12 7.1 General 12 7.2 Dimensions. 12 7.2.1 Designation .12 7.2.2 Lengths of pipe 12 7.2.3 Diameters of Type A pipes and Type A spigots of pipes or fittings. 12 7.2.4 Diameters and jointing dimensions of sockets and spigots. 13 7.2.5 Wall thicknesses 14 Types of fitting. 7.3 16 Physical characteristics. .16 8 8.1 Unplasticized poly(vinyl chloride) (PVC-U) .16 8.1.1 Physical characteristics of PVC-U pipes 16 8.1.2 Physical characteristics of PVC-Ufittings 17 8.2 Polypropylene (PP) 18 iii IS02020-All rightsreserved