EUROPEANSTANDARD ENISO13968 NORMEEUROPEENNE EUROPAISCHE NORM October 2008 ICS 23.040.20 Supersedes EN1446:1996 English Version Plastics piping and ducting systems s-Thermoplasticspipes Determination of ring flexibility (isO 13968:2008) Systemes de canalisations et de gaines en matieres Kunststoff-Rohrleitungs- und Schutzrohrsysteme - Rohre plastiques -Tubes en matieres thermoplastiques aus Thermoplasten - Bestimmung der Ringflexibilitat (ISO Determination de la flexibilite annulaire (IS0 13968:2008) 13968:2008) This European Standard was approved by CEN on 14 October 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national This European Standard exists in three official versions (English, French, German). A version in any other language made by translation official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels @2008CEN All rights of exploitation in any form and by any means reserved Ref.No.ENISO13968:2008:E worldwide for CEN national Members. ENISO13968:2008 (E) Foreword fittings and valves for the transport of fluids" in collaboration with Technical Committee CEN/TC 155"Plastics piping systems and ducting systems" the secretariat of which is held by NEN. text or by endorsement, at the latest by April 20o9, and conflicting national standards shall be withdrawn at the latestbyApril2009 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent This document supersedesEN1446:1996 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsementnotice ISO13968:2008(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization 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. rights. IsO shall not be held responsible for identifying any or all such patent rights. transportoffluids,SubcommitteeSC5,Generalpropertiesofpipes,fittingsandvalvesofplasticmaterialsand theiraccessories-Test methods and basic specifications. This second edition cancels and replaces the first edition (isO 13968:1997), which has been technically revised. IS0 2008 All rights reserved i INTERNATIONAL STANDARD ISO13968:2008(E) Plastics piping and ducting systems Thermoplastics pipes - Determination of ring flexibility Scope This International Standard specifies a method for testing the ring flexibility of a thermoplastics pipe having a circularcross-section. The method enables determination of the deflection, and necessary force, at which physical damage, if any, occurswithinthespecifieddiametricdeflection Normative references The following referenced documents are indispensable for the application of this document. For dated document (including any amendments) ap