ISO INTERNATIONAL STANDARD 28702 First edition 2008-11-01 Rubber and plastics hoses and tubing - Textile-reinforced types Sub-ambient temperature crush test Tuyauxettubesencaoutchoucetenplastique-Typesavecarmature textileEssaid'ecrasementatemperatureinferieurealatemperature ambiante Referencenumber ISO 28702:2008(E) @ISO 2008 ISO28702:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ? ISO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means. ISO's member body in the country of the requester. ISO copyright office Casepostale56.CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ISO2008-Allrights reserved ISO28702:2008(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies)._The work of preparing International Standards is normally carried out through iso International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO28702waspreparedbyTechnicalCommitteeISO/TC45,Rubberand rubberproducts,Subcommittee SC 1, Hoses (rubberandplastics) ISO 2008 - All rights reserved ii ISO28702:2008(E) Introduction This International Standard can be used to test the low-temperature properties of hoses whereby the brittle The method does not measure the flexibility of hoses at the test temperature. Other sub-ambient temperature tests for hoses and hose assemblies are given in isO 4672, Rubber and plasticshoses-Sub-ambienttemperature flexibility tests [tobereplacedbyIsO 10619-2(inpreparation)] iv @ ISO 2008 - All rights reserved INTERNATIONALSTANDARD ISO28702:2008(E) RubberandplasticshosesandtubingTextile-reinforced types Sub-ambient temperature crush test Scope This International Standard specifies a test method for measuring the low-temperature brittleness of rubber piece of the hose. This International Standard is only applicable to hoses with a nominal bore up to and including 100 mm. Normativereferences The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Iso23529,Rubber-General proceduresforpreparing andconditioningtestpiecesforphysicaltest methods 3 Principle A hose test piece is compressed to 50 % of its inside diameter at the test temperature and, after 4 Apparatus 4.1 Compression jig or any other suitable apparatus, consisting of two flat plates large enough for the hose to be compressed to 50 % of its inside diameter. 4.2 Conditioning chamber, capable of being maintained at the specified temperature as selected in Clause 6. 5Test piece Cut a ring test piece of length approximately 25mm from the hose undertest @ IS0 2008 - All rights reserved 1 ISO28702:2008(E) Testtemperature