ISO INTERNATIONAL STANDARD 21307 Third edition 2017-12 Plastics pipes and fittings Butt fusion jointing procedures for polyethylene (PE) piping systems Tubes et raccords en matieres plastiques Modes opératoires d'assemblage par soudage bout a bout de tubes et raccords en polyéthylene (PE) Reference number IS0 21307:2017(E) @ IS0 2017 IS0 21307:2017(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ii @ IS0 2017 - All rights reserved IS0 21307:2017(E) Contents Page Foreword .iv Introduction. .V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions 1 4 Butt fusion jointing process 4 4.1 General 4 4.2 Principle. 4 4.3 Cleaning the pipe or fitting ends, planing unit and heater surfaces 5 4.4 Clamping the components 5 4.5 Planing the pipe or fitting ends 5 4.6 Aligning the pipes or fittings. 6 4.7 Calculation of the gauge pressure 6 4.8 Determination of the drag pressure 6 4.9 Heating the pipe or fitting ends. 6 4.10 Jointing the pipe or fitting ends. 4.11 Cooling the pipe or fitting ends 7 5 Butt fusion jointing procedures 7 5.1 General 5.2 Single low-pressure fusion jointing procedure 7 5.3 Dual low-pressure fusion jointing procedure 9 5.4 Single high-pressure fusion jointing procedure .10 6 Quality control ..12 6.1 General .12 6.2 Destructive joint integrity testing 12 6.3 Non-destructive joint integrity testing .12 Annex A (informative) Examples of values of parameters for single low-pressure fusion jointing procedure .13 Annex B (informative) Examples of values of parameters for dual low-pressure fusion jointing procedure ..14 Annex C (informative) Examples of values of parameters for single high-pressure fusion jointing procedure ..15 Bibliography. ..16 @ IS0 2017 - All rights reserved iii