ISO INTERNATIONAL STANDARD 11678 First edition 1996-03-15 ANSi Internat Doc Sec Agricultural irrigation equipment Aluminium irrigation tubes Materiel agricole d'irrigation -- Tubes d'irrigation en aluminium ISO Reference number ISO 11678:1996(E) No reproduction or networking permited without license from IHS Not for Resale 1S011678:1996(E) Foreword ISO (the International Organization for Standardization)is a worldwide federationofnational standardsbodies(IsOmemberbodies).Thework of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for whichatechnicalcommitteehasbeenestablishedhastherighttobe represented on that committee.International organizations,governmental andnon-governmental, inliaisonwithisO,alsotakepart inthework.isO collaborates closely with the International Electrotechnical Commission (IEC)on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International a vote. International Standard iSO 11678 was prepared by Technical Committee ISo/T 23, Tractors and machinery for agriculture and forestry, Subcom- mitteeSC18,Irrigationanddrainage equipmentandsystems. ?SO1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland ii nse from IHS Not for Resale ISO 11678:1996(E) INTERNATIONALSTANDARDISO No reroductionor networking permited withoutliense from IHs Not for Resale