ISO INTERNATIONAL STANDARD 7076-2 First edition 2012-05-15 FireprotectionFoamfire extinguishing systems - Part 2: Low expansion foam equipment Protection contre I'incendie-Systemes d'extinction d'incendiea mousse- Partie2:Equipementpourmousseafaiblefoisonnement Reference number ISO 7076-2:2012(E) LSO @1S0.2012 ISO 7076-2:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO2012 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-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ISO7076-2:2012(E) Contents Page Foreword iv 1 Scope. 2 Normative references 3 Terms and definitions 4 Requirements..... 4.1 Connections... 4.2 Parts for removal during routine field maintenance. 4.3 Corrosion resistance ofmetal parts. 4.4 Elastomeric joint rings... 4.5 Plastics and reinforced resin materials. 4.6 Strength ... 4.7 Leak resistance. 4.8 Discharge coefficient (K factor) 4.9 Foam quality..... 4.10 Waterflow.. 4.11 Range of discharge. 4.12 Vapourseal 4.13 Operation reliability 4.14 Stresscorrosion. 4.15 Salt-spray corrosion... 5 4.16 Lightand water exposure 4.17 Heat and fire resistance. 6 5 Testmethods 6 5.1 General..... 5.2 Ageing test for plastics and reinforced resin materials 5.3 Liquidexposuretest.. 5.4 Equipmentpressurizationtest.. 5.5 9 5.6 Flow coefficient measurement.. 5.7 Measurementof expansionratioand drainagetime 5.8 Waterflowtest... 5.9 Rangetestsforbranchpipeandmonitor 5.10 Vapour sealing test. 5.11 Operation reliabilitytest. 5.12 Stress corrosiontest. 5.13 Salt-spray corrosiontest. 8 5.14 Lightand waterexposuretest. 9 5.15 Heat and fire resistance... 6 Marking.. 7 Manufacturer's installation and operation instructions Annex A (normative)Tolerances Bibliography ISO7076-2:2012(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (isOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISo technical committees.Each memberbody interested in a subjectforwhich atechnical committee has been Electrotechnical Commission (IEC)on all matters of electrotechnical standardization. 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 member bodies 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. ISO7076-2waspreparedbyTechnical CommitteeISO/TC21,Equipmentfor fireprotectionandfire fighting SubcommitteeSc6,Foamandpowdermediaandfirefightingsystemsusingfoamandpowder. -Part1:Foamproportioning equipment Part2:Lowexpansionfoamequipment Part 5: Compressed air foam equipment1) 1) To be published. ISO 7076-2:2012(E) INTERNATIONALSTANDARD Fire protectionFoam fire extinguishing systems - Part 2: Low expansion foam equipment 1 Scope fixed-foam extinguishing systems for indoor or outdoor use or both. This International Standard is applicable to sprayers, branchpipes, monitors, low expansion foam generators, foam chambers, etc. 2Normativereferences The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies.Forundated references, the latest edition of the referenced document (including any amendments) applies. Iso 7-1, Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation I