ISO INTERNATIONAL STANDARD 13056 First edition 2011-11-01 PlasticspipingsystemsPressure systems for hot and cold water Test method for leaktightness under vacuum Systemesdecanalisationsenplastique-Systemespourinstallation d'eauchaudeet froide souspression-Methoded'essai deI'étancheité sous vide Reference number ISO 13056:2011(E) LSO @ISO.2011 ISO 13056:2011(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2011 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 either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56:CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ISO13056:2011(E) Foreword (isOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughiSo technical committees.Eachmemberbody interested ina subjectforwhichatechnical committeehasbeen Electrotechnical Commission (IEC)onall matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards 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 memberbodies casting a vote Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO13056waspreparedbyTechnical CommitteeISO/TC138,Plasticspipes,fittingsandvalvesforthe transportoffluids,SubcommitteeSC5,Generalpropertiesofpipes,fittingsandvalvesofplasticmaterialsand theiraccessories-Testmethodsandbasicspecifications. ISO 13056:2011(E) INTERNATIONALSTANDARD Plastics piping systems Pressure systems for hot and cold water Test method for leaktightness under vacuum 1 Scope This International Standard specifies a method for testing the leaktightness under vacuum of joints for thermoplastics piping systems. It is applicable to piping systems based on thermoplastics pipes intended to be used in hot and cold water pressureapplications. Principle Anassemblyofpipes andfittings is subjected to partial vacuumfora specific period during which the joints are inspected for airtightness. It is assumed that the following test parameters are set by the standard making reference to this International Standard: a) the number of test pieces (see 4.2); b) the test temperature (see 6.1); the test pressure (see 6.2); (p the duration of test (see 6.3); the pressure increase which indicates a failure (see 6.3) Apparatus 3.1 Vacuum source (pump), capable of producing in the test piece the partial vacuum specified in the referring standard. 3.2 Vacuumpressure measurement device, capableofmeasuringthe pressure in thetest piece with an accuracy of ±0,01 bar1). 3.3 Shut-off valve, to isolate the test piece from the vacuum source (3.1). 3.4 Thermometer(s), capable of checking conformity to the specified test temperature (see 6.1). 3.5 End-sealing device, of appropriate size and sealing method for sealing the non-jointed end of the test piece. The device shall be restrained in a manner that does not exert longitudinal forces on the joints. A typical test arrangement is shown in Figure 1. 1) 1 bar = 100 kPa. ISO 13056:2011(E) 4 2 2 5 9 Key end-sealingdevice 2 pipe section joint under test 3 vacuumpressuregauge 5 connection to vacuumpump (shut-off valve notdepicted) 6 vacuumpump Figure 1-Typical test arrangement Test pieces 4 4.1 Preparation The test piece shall comprisean assemblyofpipes and/orfittings joined in accordance with the manufacturer's recommended practice. The test piece shall