BRITISH STANDARDBS EN ISO13968:2008Plastics piping andducting systemsThermoplastics pipesDetermination ofring flexibility (IsO13968:2008)建筑JZ.JZ0.NECs23.040.20O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBritish Standards2.、BS EN ISO 13968: 2008National forewordThis British Standard is the uK implementation of EN ISO 13968: 2008It supersedes Bs en 1446: 1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee Pri/88/4. Test methods.A list of organizations represented on this committee can be obtained onest to itThis publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applicationCompliance with a British Standard cannot confer immunityfrom legal obligations建筑This British StandardAmendments/corrigenda issued since publicationwas published under theauthority of the StandardsPolicy and StrategyDateCommentsCommittee on 30 une 2009ISBN97805805665302.、EUROPEAN STANDARDEN ISO 13968NORME EUROPEENNEEUROPAISCHE NORMOctober 2008cs23.040.20Supersedes EN 1446: 1996English VersionPlastics piping and ducting systems- Thermoplastics pipesDetermination of ring flexibility(Iso 13968: 2008)emes de canalisations et de gaines en matieresKunststoff-Rohrleitungs-und Schutzrohrsysteme-Rohretiques. Tubes en matieres thermoplastiquesaus Thermoplasten-Bestimmung der Ringflexibilitat (ISOnation de la flexibility annulare(ISo 13968: 20This European Standard was approved by CEN on 14 October 2008CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the cen Management Centre or to any CEn member.This European Standard exists in three official versions(English, French, German ). A version in any other language made by translationber into its ownge and nottified to the cen management Centre has the same status as theofficial versionsCEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, FinlandFrance, Germany, Greece, Hungary, Iceland, Ireland, itaiy, Latvia, Lithuania,/ Luxembourg Malta, Netherlands, Norway, Poland, PortugalRomania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United KingdomEUROPEAN COMMITTEE FOR STANDARDIZATICOMITE EUROPEEN DE NORMALISATIONEUROPAISCHES KOMITEE FUR NORMUNGManagement Centre: rue de stassart, 36 B-1050 Brussels@2008 CEN All rights of exploitation in any form and by any means reservedRef No EN ISo 13968: 2008: E2.、 BRITISH STANDARDBS EN ISO13968:2008Plastics piping andducting systemsThermoplastics pipesDetermination ofring flexibility (IsO13968:2008)建筑JZ.JZ0.NECs23.040.20O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBritish Standards2.、BS EN ISO 13968: 2008National forewordThis British Standard is the uK implementation of EN ISO 13968: 2008It supersedes Bs en 1446: 1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee Pri/88/4. Test methods.A list of organizations represented on this committee can be obtained onest to itThis publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applicationCompliance with a British Standard cannot confer immunityfrom legal obligations建筑This British StandardAmendments/corrigenda issued since publicationwas published under theauthority of the StandardsPolicy and StrategyDateCommentsCommittee on 30 une 2009ISBN97805805665302.、EUROPEAN STANDARDEN ISO 13968NORME EUROPEENNEEUROPAISCHE NORMOctober 2008cs23.040.20Supersedes EN 1446: 1996English VersionPlastics piping and ducting systems- Thermoplastics pipesDetermination of ring flexibility(Iso 13968: 2008)emes de canalisations et de gaines en matieresKunststoff-Rohrleitungs-und Schutzrohrsysteme-Rohretiques. Tubes en matieres thermoplastiquesaus Thermoplasten-Bestimmung der Ringflexibilitat (ISOnation de la flexibility annulare(ISo 13968: 20This European Standard was approved by CEN on 14 October 2008CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the cen Management Centre or to any CEn member.This European Standard exists in three official versions(English, French, German ). A version in any other language made by translationber into its ownge and nottified to the cen management Centre has the same status as theofficial versionsCEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, FinlandFrance, Germany, Greece, Hungary, Iceland, Ireland, itaiy, Latvia, Lithuania,/ Luxembourg Malta, Netherlands, Norway, Poland, PortugalRomania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United KingdomEUROPEAN COMMITTEE FOR STANDARDIZATICOMITE EUROPEEN DE NORMALISATIONEUROPAISCHES KOMITEE FUR NORMUNGManagement Centre: rue de stassart, 36 B-1050 Brussels@2008 CEN All rights of exploitation in any form and by any means reservedRef No EN ISo 13968: 2008: E2.、BS EN ISO 13968: 2008ENso13968:2008(EForewordThis document (EN ISo 13968: 2008)has been prepared by Technical Committee ISo/TC 138"Plastics pipesfittings and valves for the transport of fluids"in collaboration with Technical Committee CEN/TC 155 "Plasticspiping systems and ducting systems"the secretariat of which is held by NENThis European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at thelatest by April 2009Attention is drawn to theibility that some of the elements of this document may be the subject of patentrights. CEN (and/or CENELEC] shall not be held responsible for identifying any or all such patent rightsThis document supersedes EN 1446: 1996According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, SlSweden, Switzerland and the United KingdomEndorsement noticeThe text of Iso 13968: 2008 has been approved by cen as a En Isowithout any modification2.、 BRITISH STANDARDBS EN ISO13968:2008Plastics piping andducting systemsThermoplastics pipesDetermination ofring flexibility (IsO13968:2008)建筑JZ.JZ0.NECs23.040.20O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBritish Standards2.、BS EN ISO 13968: 2008National forewordThis British Standard is the uK implementation of EN ISO 13968: 2008It supersedes Bs en 1446: 1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee Pri/88/4. Test methods.A list of organizations represented on this committee can be obtained onest to itThis publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applicationCompliance with a British Standard cannot confer immunityfrom legal obligations建筑This British StandardAmendments/corrigenda issued since publicationwas published under theauthority of the StandardsPolicy and StrategyDateCommentsCommittee on 30 une 2009ISBN97805805665302.、EUROPEAN STANDARDEN ISO 13968NORME EUROPEENNEEUROPAISCHE NORMOctober 2008cs23.040.20Supersedes EN 1446: 1996English VersionPlastics piping and ducting systems- Thermoplastics pipesDetermination of ring flexibility(Iso 13968: 2008)emes de canalisations et de gaines en matieresKunststoff-Rohrleitungs-und Schutzrohrsysteme-Rohretiques. Tubes en matieres thermoplastiquesaus Thermoplasten-Bestimmung der Ringflexibilitat (ISOnation de la flexibility annulare(ISo 13968: 20This European Standard was approved by CEN on 14 October 2008CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the cen Management Centre or to any CEn member.This European Standard exists in three official versions(English, French, German ). A version in any other language made by translationber into its ownge and nottified to the cen management Centre has the same status as theofficial versionsCEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, FinlandFrance, Germany, Greece, Hungary, Iceland, Ireland, itaiy, Latvia, Lithuania,/ Luxembourg Malta, Netherlands, Norway, Poland, PortugalRomania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United KingdomEUROPEAN COMMITTEE FOR STANDARDIZATICOMITE EUROPEEN DE NORMALISATIONEUROPAISCHES KOMITEE FUR NORMUNGManagement Centre: rue de stassart, 36 B-1050 Brussels@2008 CEN All rights of exploitation in any form and by any means reservedRef No EN ISo 13968: 2008: E2.、BS EN ISO 13968: 2008ENso13968:2008(EForewordThis document (EN ISo 13968: 2008)has been prepared by Technical Committee ISo/TC 138"Plastics pipesfittings and valves for the transport of fluids"in collaboration with Technical Committee CEN/TC 155 "Plasticspiping systems and ducting systems"the secretariat of which is held by NENThis European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at thelatest by April 2009Attention is drawn to theibility that some of the elements of this document may be the subject of patentrights. CEN (and/or CENELEC] shall not be held responsible for identifying any or all such patent rightsThis document supersedes EN 1446: 1996According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, SlSweden, Switzerland and the United KingdomEndorsement noticeThe text of Iso 13968: 2008 has been approved by cen as a En Isowithout any modification2.、BS EN ISO 13968: 2008lso13968:2008(EForewordISo( 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 Isotechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee International organizations, governmental andnon-governmental, in liaison with Iso, also take part in the work. Iso collaborates closely with theInternational Electrotechnical Commission(IEC)on all matters of electrotechnical standardizationInternational Standards are drafted in accordance with the rules given in the ISo/EC Directives, Part 2The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 of the member bodies casting a voteAttention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISo shall not be held responsible for identifying any or all such patent rightsISo 13968 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for thetransport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials andtheir accessories- Test methods and basic specificationsThis second edition cancels and replaces the first edition (ISo 13968: 1997), which has been technicallyrevised建筑|so2008-A2.、 BRITISH STANDARDBS EN ISO13968:2008Plastics piping andducting systemsThermoplastics pipesDetermination ofring flexibility (IsO13968:2008)建筑JZ.JZ0.NECs23.040.20O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBritish Standards2.、BS EN ISO 13968: 2008National forewordThis British Standard is the uK implementation of EN ISO 13968: 2008It supersedes Bs en 1446: 1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee Pri/88/4. Test methods.A list of organizations represented on this committee can be obtained onest to itThis publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applicationCompliance with a British Standard cannot confer immunityfrom legal obligations建筑This British StandardAmendments/corrigenda issued since publicationwas published under theauthority of the StandardsPolicy and StrategyDateCommentsCommittee on 30 une 2009ISBN97805805665302.、EUROPEAN STANDARDEN ISO 13968NORME EUROPEENNEEUROPAISCHE NORMOctober 2008cs23.040.20Supersedes EN 1446: 1996English VersionPlastics piping and ducting systems- Thermoplastics pipesDetermination of ring flexibility(Iso 13968: 2008)emes de canalisations et de gaines en matieresKunststoff-Rohrleitungs-und Schutzrohrsysteme-Rohretiques. Tubes en matieres thermoplastiquesaus Thermoplasten-Bestimmung der Ringflexibilitat (ISOnation de la flexibility annulare(ISo 13968: 20This European Standard was approved by CEN on 14 October 2008CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the cen Management Centre or to any CEn member.This European Standard exists in three official versions(English, French, German ). A version in any other language made by translationber into its ownge and nottified to the cen management Centre has the same status as theofficial versionsCEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, FinlandFrance, Germany, Greece, Hungary, Iceland, Ireland, itaiy, Latvia, Lithuania,/ Luxembourg Malta, Netherlands, Norway, Poland, PortugalRomania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United KingdomEUROPEAN COMMITTEE FOR STANDARDIZATICOMITE EUROPEEN DE NORMALISATIONEUROPAISCHES KOMITEE FUR NORMUNGManagement Centre: rue de stassart, 36 B-1050 Brussels@2008 CEN All rights of exploitation in any form and by any means reservedRef No EN ISo 13968: 2008: E2.、BS EN ISO 13968: 2008ENso13968:2008(EForewordThis document (EN ISo 13968: 2008)has been prepared by Technical Committee ISo/TC 138"Plastics pipesfittings and valves for the transport of fluids"in collaboration with Technical Committee CEN/TC 155 "Plasticspiping systems and ducting systems"the secretariat of which is held by NENThis European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at thelatest by April 2009Attention is drawn to theibility that some of the elements of this document may be the subject of patentrights. CEN (and/or CENELEC] shall not be held responsible for identifying any or all such patent rightsThis document supersedes EN 1446: 1996According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, SlSweden, Switzerland and the United KingdomEndorsement noticeThe text of Iso 13968: 2008 has been approved by cen as a En Isowithout any modification2.、BS EN ISO 13968: 2008lso13968:2008(EForewordISo( 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 Isotechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee International organizations, governmental andnon-governmental, in liaison with Iso, also take part in the work. Iso collaborates closely with theInternational Electrotechnical Commission(IEC)on all matters of electrotechnical standardizationInternational Standards are drafted in accordance with the rules given in the ISo/EC Directives, Part 2The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 of the member bodies casting a voteAttention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISo shall not be held responsible for identifying any or all such patent rightsISo 13968 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for thetransport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials andtheir accessories- Test methods and basic specificationsThis second edition cancels and replaces the first edition (ISo 13968: 1997), which has been technicallyrevised建筑|so2008-A2.、BS EN ISO 13968: 2008建筑2.、 BRITISH STANDARDBS EN ISO13968:2008Plastics piping andducting systemsThermoplastics pipesDetermination ofring flexibility (IsO13968:2008)建筑JZ.JZ0.NECs23.040.20O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBritish Standards2.、BS EN ISO 13968: 2008National forewordThis British Standard is the uK implementation of EN ISO 13968: 2008It supersedes Bs en 1446: 1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee Pri/88/4. Test methods.A list of organizations represented on this committee can be obtained onest to itThis publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applicationCompliance with a British Standard cannot confer immunityfrom legal obligations建筑This British StandardAmendments/corrigenda issued since publicationwas published under theauthority of the StandardsPolicy and StrategyDateCommentsCommittee on 30 une 2009ISBN97805805665302.、EUROPEAN STANDARDEN ISO 13968NORME EUROPEENNEEUROPAISCHE NORMOctober 2008cs23.040.20Supersedes EN 1446: 1996English VersionPlastics piping and ducting systems- Thermoplastics pipesDetermination of ring flexibility(Iso 13968: 2008)emes de canalisations et de gaines en matieresKunststoff-Rohrleitungs-und Schutzrohrsysteme-Rohretiques. Tubes en matieres thermoplastiquesaus Thermoplasten-Bestimmung der Ringflexibilitat (ISOnation de la flexibility annulare(ISo 13968: 20This European Standard was approved by CEN on 14 October 2008CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the cen Management Centre or to any CEn member.This European Standard exists in three official versions(English, French, German ). A version in any other language made by translationber into its ownge and nottified to the cen management Centre has the same status as theofficial versionsCEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, FinlandFrance, Germany, Greece, Hungary, Iceland, Ireland, itaiy, Latvia, Lithuania,/ Luxembourg Malta, Netherlands, Norway, Poland, PortugalRomania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United KingdomEUROPEAN COMMITTEE FOR STANDARDIZATICOMITE EUROPEEN DE NORMALISATIONEUROPAISCHES KOMITEE FUR NORMUNGManagement Centre: rue de stassart, 36 B-1050 Brussels@2008 CEN All rights of exploitation in any form and by any means reservedRef No EN ISo 13968: 2008: E2.、BS EN ISO 13968: 2008ENso13968:2008(EForewordThis document (EN ISo 13968: 2008)has been prepared by Technical Committee ISo/TC 138"Plastics pipesfittings and valves for the transport of fluids"in collaboration with Technical Committee CEN/TC 155 "Plasticspiping systems and ducting systems"the secretariat of which is held by NENThis European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at thelatest by April 2009Attention is drawn to theibility that some of the elements of this document may be the subject of patentrights. CEN (and/or CENELEC] shall not be held responsible for identifying any or all such patent rightsThis document supersedes EN 1446: 1996According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, SlSweden, Switzerland and the United KingdomEndorsement noticeThe text of Iso 13968: 2008 has been approved by cen as a En Isowithout any modification2.、BS EN ISO 13968: 2008lso13968:2008(EForewordISo( 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 Isotechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee International organizations, governmental andnon-governmental, in liaison with Iso, also take part in the work. Iso collaborates closely with theInternational Electrotechnical Commission(IEC)on all matters of electrotechnical standardizationInternational Standards are drafted in accordance with the rules given in the ISo/EC Directives, Part 2The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 of the member bodies casting a voteAttention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISo shall not be held responsible for identifying any or all such patent rightsISo 13968 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for thetransport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials andtheir accessories- Test methods and basic specificationsThis second edition cancels and replaces the first edition (ISo 13968: 1997), which has been technicallyrevised建筑|so2008-A2.、BS EN ISO 13968: 2008建筑2.、BS EN ISO 13968: 2008INTERNATIONAL STANDARDlso13968:2008(E)Plastics piping and ducting systems -- Thermoplastics pipesDetermination of ring flexibility1 ScopeThis International Standard specifies a method for testing the ring flexibility of a thermoplastics pipe having acircular cross-sectionThe method enables determination of the deflection, and necessary force, at which physical damage, if any,occurs within the specified diametric deflection2 Normative referencesThe following referenced documents are indispensable for the application of this document. Forreferences, only the edition cited applies. For undated references, the latest edition of the refererdocument(including any amendments)appliesso 9969, Thermoplastics pipes -Determination of ring stiffness系材∠JZS3 Terms and definitionsFor the purposes of this document, the following terms and definitions a3.1ring flexibilityability of a pipe to resist ring diametric deflection without loss of structural integrityEN13476-1:2007,3.1210]4 PrincipleThe ring flexibility of a pipe is tested by measuring the force and the deflection while deflecting a ring sectionfrom the pipe diametrically at a constant speed until at least the specified deflection is achieved or priorfracture has occurredEach test piece is monitored during testing and subsequently inspected for signs of several specific types ofmechanical failureNOTE It is assumed that the following test parameters are set by the standard making reference to this InternationalStandard)if appropriate, a greater length of the test pieces than the length specified in ISo 9969, see Clause 6:|so2008-A2.、 BRITISH STANDARDBS EN ISO13968:2008Plastics piping andducting systemsThermoplastics pipesDetermination ofring flexibility (IsO13968:2008)建筑JZ.JZ0.NECs23.040.20O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBritish Standards2.、BS EN ISO 13968: 2008National forewordThis British Standard is the uK implementation of EN ISO 13968: 2008It supersedes Bs en 1446: 1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee Pri/88/4. Test methods.A list of organizations represented on this committee can be obtained onest to itThis publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applicationCompliance with a British Standard cannot confer immunityfrom legal obligations建筑This British StandardAmendments/corrigenda issued since publicationwas published under theauthority of the StandardsPolicy and StrategyDateCommentsCommittee on 30 une 2009ISBN97805805665302.、EUROPEAN STANDARDEN ISO 13968NORME EUROPEENNEEUROPAISCHE NORMOctober 2008cs23.040.20Supersedes EN 1446: 1996English VersionPlastics piping and ducting systems- Thermoplastics pipesDetermination of ring flexibility(Iso 13968: 2008)emes de canalisations et de gaines en matieresKunststoff-Rohrleitungs-und Schutzrohrsysteme-Rohretiques. Tubes en matieres thermoplastiquesaus Thermoplasten-Bestimmung der Ringflexibilitat (ISOnation de la flexibility annulare(ISo 13968: 20This European Standard was approved by CEN on 14 October 2008CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the cen Management Centre or to any CEn member.This European Standard exists in three official versions(English, French, German ). A version in any other language made by translationber into its ownge and nottified to the cen management Centre has the same status as theofficial versionsCEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, FinlandFrance, Germany, Greece, Hungary, Iceland, Ireland, itaiy, Latvia, Lithuania,/ Luxembourg Malta, Netherlands, Norway, Poland, PortugalRomania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United KingdomEUROPEAN COMMITTEE FOR STANDARDIZATICOMITE EUROPEEN DE NORMALISATIONEUROPAISCHES KOMITEE FUR NORMUNGManagement Centre: rue de stassart, 36 B-1050 Brussels@2008 CEN All rights of exploitation in any form and by any means reservedRef No EN ISo 13968: 2008: E2.、BS EN ISO 13968: 2008ENso13968:2008(EForewordThis document (EN ISo 13968: 2008)has been prepared by Technical Committee ISo/TC 138"Plastics pipesfittings and valves for the transport of fluids"in collaboration with Technical Committee CEN/TC 155 "Plasticspiping systems and ducting systems"the secretariat of which is held by NENThis European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at thelatest by April 2009Attention is drawn to theibility that some of the elements of this document may be the subject of patentrights. CEN (and/or CENELEC] shall not be held responsible for identifying any or all such patent rightsThis document supersedes EN 1446: 1996According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, SlSweden, Switzerland and the United KingdomEndorsement noticeThe text of Iso 13968: 2008 has been approved by cen as a En Isowithout any modification2.、BS EN ISO 13968: 2008lso13968:2008(EForewordISo( 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 Isotechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee International organizations, governmental andnon-governmental, in liaison with Iso, also take part in the work. Iso collaborates closely with theInternational Electrotechnical Commission(IEC)on all matters of electrotechnical standardizationInternational Standards are drafted in accordance with the rules given in the ISo/EC Directives, Part 2The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 of the member bodies casting a voteAttention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISo shall not be held responsible for identifying any or all such patent rightsISo 13968 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for thetransport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials andtheir accessories- Test methods and basic specificationsThis second edition cancels and replaces the first edition (ISo 13968: 1997), which has been technicallyrevised建筑|so2008-A2.、BS EN ISO 13968: 2008建筑2.、BS EN ISO 13968: 2008INTERNATIONAL STANDARDlso13968:2008(E)Plastics piping and ducting systems -- Thermoplastics pipesDetermination of ring flexibility1 ScopeThis International Standard specifies a method for testing the ring flexibility of a thermoplastics pipe having acircular cross-sectionThe method enables determination of the deflection, and necessary force, at which physical damage, if any,occurs within the specified diametric deflection2 Normative referencesThe following referenced documents are indispensable for the application of this document. Forreferences, only the edition cited applies. For undated references, the latest edition of the refererdocument(including any amendments)appliesso 9969, Thermoplastics pipes -Determination of ring stiffness系材∠JZS3 Terms and definitionsFor the purposes of this document, the following terms and definitions a3.1ring flexibilityability of a pipe to resist ring diametric deflection without loss of structural integrityEN13476-1:2007,3.1210]4 PrincipleThe ring flexibility of a pipe is tested by measuring the force and the deflection while deflecting a ring sectionfrom the pipe diametrically at a constant speed until at least the specified deflection is achieved or priorfracture has occurredEach test piece is monitored during testing and subsequently inspected for signs of several specific types ofmechanical failureNOTE It is assumed that the following test parameters are set by the standard making reference to this InternationalStandard)if appropriate, a greater length of the test pieces than the length specified in ISo 9969, see Clause 6:|so2008-A2.、BS EN ISO 13968: 2008so13968:2008(E)5 Apparatu5.1 Compression testing machine, as specified in Iso 9969, but capable of producing at least thespecified diametric deflection of the test piece at the applicable speed (see ISo 9969: 2007, Table 1)diametric deflections up to at least the specified deflection and the corresponding compressive forces. asuring5.2 Dimensional and force measuring devices, conforming to Iso 9969, but capable of me6 Test piecesPrepare three test pieces from a single pipe, as specified in ISo 9969, and designate them a, b, and cspectively. The referring standard may specify longer test pieces than defined in ISo 99697 ConditioningCondition the test pieces as specified in ISo 99698 Procedure8.1 Conduct the test in accordance with the procedure given in Iso 9969, but continue compression whilemeasuring the change in either inside diameter or outside diameter until the specified deflection has beenachieved. Unless otherwise specified in the referring standard, the deflection shall be 30 %of the outsidediametered or the testiece has failed, whichIf desired, the deflection may be continued after a failure has occurred or the specified deflection has beeneached in order to determine other properties of the pipe8.2 For each test piece, prepare a force/deflection graph, and inspect and record the type and the positionof each event [a)to e)] with respect to the corresponding force and deflectiona) Inspect the force/deflection graph for compliance to the requirements in the referring standardb) Check for any cracking or crazing in any part of the wall structurec) Check for any wall delaminationd) Check for any permanent buckling in any part of the structure of the pipe walle)Make any other observation as specified in the referring standard.Whitening of the pipe shall not be considered as an indication of one of the above-mentioned mechanicalfailuresIso 2008-All rights reserved2.、 BRITISH STANDARDBS EN ISO13968:2008Plastics piping andducting systemsThermoplastics pipesDetermination ofring flexibility (IsO13968:2008)建筑JZ.JZ0.NECs23.040.20O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBritish Standards2.、BS EN ISO 13968: 2008National forewordThis British Standard is the uK implementation of EN ISO 13968: 2008It supersedes Bs en 1446: 1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee Pri/88/4. Test methods.A list of organizations represented on this committee can be obtained onest to itThis publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applicationCompliance with a British Standard cannot confer immunityfrom legal obligations建筑This British StandardAmendments/corrigenda issued since publicationwas published under theauthority of the StandardsPolicy and StrategyDateCommentsCommittee on 30 une 2009ISBN97805805665302.、EUROPEAN STANDARDEN ISO 13968NORME EUROPEENNEEUROPAISCHE NORMOctober 2008cs23.040.20Supersedes EN 1446: 1996English VersionPlastics piping and ducting systems- Thermoplastics pipesDetermination of ring flexibility(Iso 13968: 2008)emes de canalisations et de gaines en matieresKunststoff-Rohrleitungs-und Schutzrohrsysteme-Rohretiques. Tubes en matieres thermoplastiquesaus Thermoplasten-Bestimmung der Ringflexibilitat (ISOnation de la flexibility annulare(ISo 13968: 20This European Standard was approved by CEN on 14 October 2008CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the cen Management Centre or to any CEn member.This European Standard exists in three official versions(English, French, German ). A version in any other language made by translationber into its ownge and nottified to the cen management Centre has the same status as theofficial versionsCEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, FinlandFrance, Germany, Greece, Hungary, Iceland, Ireland, itaiy, Latvia, Lithuania,/ Luxembourg Malta, Netherlands, Norway, Poland, PortugalRomania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United KingdomEUROPEAN COMMITTEE FOR STANDARDIZATICOMITE EUROPEEN DE NORMALISATIONEUROPAISCHES KOMITEE FUR NORMUNGManagement Centre: rue de stassart, 36 B-1050 Brussels@2008 CEN All rights of exploitation in any form and by any means reservedRef No EN ISo 13968: 2008: E2.、BS EN ISO 13968: 2008ENso13968:2008(EForewordThis document (EN ISo 13968: 2008)has been prepared by Technical Committee ISo/TC 138"Plastics pipesfittings and valves for the transport of fluids"in collaboration with Technical Committee CEN/TC 155 "Plasticspiping systems and ducting systems"the secretariat of which is held by NENThis European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at thelatest by April 2009Attention is drawn to theibility that some of the elements of this document may be the subject of patentrights. CEN (and/or CENELEC] shall not be held responsible for identifying any or all such patent rightsThis document supersedes EN 1446: 1996According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, SlSweden, Switzerland and the United KingdomEndorsement noticeThe text of Iso 13968: 2008 has been approved by cen as a En Isowithout any modification2.、BS EN ISO 13968: 2008lso13968:2008(EForewordISo( 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 Isotechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee International organizations, governmental andnon-governmental, in liaison with Iso, also take part in the work. Iso collaborates closely with theInternational Electrotechnical Commission(IEC)on all matters of electrotechnical standardizationInternational Standards are drafted in accordance with the rules given in the ISo/EC Directives, Part 2The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 of the member bodies casting a voteAttention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISo shall not be held responsible for identifying any or all such patent rightsISo 13968 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for thetransport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials andtheir accessories- Test methods and basic specificationsThis second edition cancels and replaces the first edition (ISo 13968: 1997), which has been technicallyrevised建筑|so2008-A2.、BS EN ISO 13968: 2008建筑2.、BS EN ISO 13968: 2008INTERNATIONAL STANDARDlso13968:2008(E)Plastics piping and ducting systems -- Thermoplastics pipesDetermination of ring flexibility1 ScopeThis International Standard specifies a method for testing the ring flexibility of a thermoplastics pipe having acircular cross-sectionThe method enables determination of the deflection, and necessary force, at which physical damage, if any,occurs within the specified diametric deflection2 Normative referencesThe following referenced documents are indispensable for the application of this document. Forreferences, only the edition cited applies. For undated references, the latest edition of the refererdocument(including any amendments)appliesso 9969, Thermoplastics pipes -Determination of ring stiffness系材∠JZS3 Terms and definitionsFor the purposes of this document, the following terms and definitions a3.1ring flexibilityability of a pipe to resist ring diametric deflection without loss of structural integrityEN13476-1:2007,3.1210]4 PrincipleThe ring flexibility of a pipe is tested by measuring the force and the deflection while deflecting a ring sectionfrom the pipe diametrically at a constant speed until at least the specified deflection is achieved or priorfracture has occurredEach test piece is monitored during testing and subsequently inspected for signs of several specific types ofmechanical failureNOTE It is assumed that the following test parameters are set by the standard making reference to this InternationalStandard)if appropriate, a greater length of the test pieces than the length specified in ISo 9969, see Clause 6:|so2008-A2.、BS EN ISO 13968: 2008so13968:2008(E)5 Apparatu5.1 Compression testing machine, as specified in Iso 9969, but capable of producing at least thespecified diametric deflection of the test piece at the applicable speed (see ISo 9969: 2007, Table 1)diametric deflections up to at least the specified deflection and the corresponding compressive forces. asuring5.2 Dimensional and force measuring devices, conforming to Iso 9969, but capable of me6 Test piecesPrepare three test pieces from a single pipe, as specified in ISo 9969, and designate them a, b, and cspectively. The referring standard may specify longer test pieces than defined in ISo 99697 ConditioningCondition the test pieces as specified in ISo 99698 Procedure8.1 Conduct the test in accordance with the procedure given in Iso 9969, but continue compression whilemeasuring the change in either inside diameter or outside diameter until the specified deflection has beenachieved. Unless otherwise specified in the referring standard, the deflection shall be 30 %of the outsidediametered or the testiece has failed, whichIf desired, the deflection may be continued after a failure has occurred or the specified deflection has beeneached in order to determine other properties of the pipe8.2 For each test piece, prepare a force/deflection graph, and inspect and record the type and the positionof each event [a)to e)] with respect to the corresponding force and deflectiona) Inspect the force/deflection graph for compliance to the requirements in the referring standardb) Check for any cracking or crazing in any part of the wall structurec) Check for any wall delaminationd) Check for any permanent buckling in any part of the structure of the pipe walle)Make any other observation as specified in the referring standard.Whitening of the pipe shall not be considered as an indication of one of the above-mentioned mechanicalfailuresIso 2008-All rights reserved2.、BS EN ISO 13968: 2008lso13968:2008(E9 Test reportThe test report shall include at least the following informationa) a reference to this International Standard and to the referring standardb) the identification of the thermoplastics pipe, including1)manufacturer.2)type of pipe,dimensions4)production date,5 lengths of test pieces6) mass per metre length of the pipe;c)the test temperaturd) the force/deflection graph for each test piecee)where appropriate, the force and deflection at which any of the events specified in 8.2 occurredf) the deflection and force at the maximum point, if a maximum occurredg) any factors which may have affected the results, such as any incidents or any operating details notspecified in this International standard:h) the date of test|so2008-A2.、 BRITISH STANDARDBS EN ISO13968:2008Plastics piping andducting systemsThermoplastics pipesDetermination ofring flexibility (IsO13968:2008)建筑JZ.JZ0.NECs23.040.20O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBritish Standards2.、BS EN ISO 13968: 2008National forewordThis British Standard is the uK implementation of EN ISO 13968: 2008It supersedes Bs en 1446: 1996 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee Pri/88/4. Test methods.A list of organizations represented on this committee can be obtained onest to itThis publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applicationCompliance with a British Standard cannot confer immunityfrom legal obligations建筑This British StandardAmendments/corrigenda issued since publicationwas published under theauthority of the StandardsPolicy and StrategyDateCommentsCommittee on 30 une 2009ISBN97805805665302.、EUROPEAN STANDARDEN ISO 13968NORME EUROPEENNEEUROPAISCHE NORMOctober 2008cs23.040.20Supersedes EN 1446: 1996English VersionPlastics piping and ducting systems- Thermoplastics pipesDetermination of ring flexibility(Iso 13968: 2008)emes de canalisations et de gaines en matieresKunststoff-Rohrleitungs-und Schutzrohrsysteme-Rohretiques. Tubes en matieres thermoplastiquesaus Thermoplasten-Bestimmung der Ringflexibilitat (ISOnation de la flexibility annulare(ISo 13968: 20This European Standard was approved by CEN on 14 October 2008CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the cen Management Centre or to any CEn member.This European Standard exists in three official versions(English, French, German ). A version in any other language made by translationber into its ownge and nottified to the cen management Centre has the same status as theofficial versionsCEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, FinlandFrance, Germany, Greece, Hungary, Iceland, Ireland, itaiy, Latvia, Lithuania,/ Luxembourg Malta, Netherlands, Norway, Poland, PortugalRomania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United KingdomEUROPEAN COMMITTEE FOR STANDARDIZATICOMITE EUROPEEN DE NORMALISATIONEUROPAISCHES KOMITEE FUR NORMUNGManagement Centre: rue de stassart, 36 B-1050 Brussels@2008 CEN All rights of exploitation in any form and by any means reservedRef No EN ISo 13968: 2008: E2.、BS EN ISO 13968: 2008ENso13968:2008(EForewordThis document (EN ISo 13968: 2008)has been prepared by Technical Committee ISo/TC 138"Plastics pipesfittings and valves for the transport of fluids"in collaboration with Technical Committee CEN/TC 155 "Plasticspiping systems and ducting systems"the secretariat of which is held by NENThis European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at thelatest by April 2009Attention is drawn to theibility that some of the elements of this document may be the subject of patentrights. CEN (and/or CENELEC] shall not be held responsible for identifying any or all such patent rightsThis document supersedes EN 1446: 1996According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, SlSweden, Switzerland and the United KingdomEndorsement noticeThe text of Iso 13968: 2008 has been approved by cen as a En Isowithout any modification2.、BS EN ISO 13968: 2008lso13968:2008(EForewordISo( 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 Isotechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee International organizations, governmental andnon-governmental, in liaison with Iso, also take part in the work. Iso collaborates closely with theInternational Electrotechnical Commission(IEC)on all matters of electrotechnical standardizationInternational Standards are drafted in accordance with the rules given in the ISo/EC Directives, Part 2The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 of the member bodies casting a voteAttention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISo shall not be held responsible for identifying any or all such patent rightsISo 13968 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for thetransport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials andtheir accessories- Test methods and basic specificationsThis second edition cancels and replaces the first edition (ISo 13968: 1997), which has been technicallyrevised建筑|so2008-A2.、BS EN ISO 13968: 2008建筑2.、BS EN ISO 13968: 2008INTERNATIONAL STANDARDlso13968:2008(E)Plastics piping and ducting systems -- Thermoplastics pipesDetermination of ring flexibility1 ScopeThis International Standard specifies a method for testing the ring flexibility of a thermoplastics pipe having acircular cross-sectionThe method enables determination of the deflection, and necessary force, at which physical damage, if any,occurs within the specified diametric deflection2 Normative referencesThe following referenced documents are indispensable for the application of this document. Forreferences, only the edition cited applies. For undated references, the latest edition of the refererdocument(including any amendments)appliesso 9969, Thermoplastics pipes -Determination of ring stiffness系材∠JZS3 Terms and definitionsFor the purposes of this document, the following terms and definitions a3.1ring flexibilityability of a pipe to resist ring diametric deflection without loss of structural integrityEN13476-1:2007,3.1210]4 PrincipleThe ring flexibility of a pipe is tested by measuring the force and the deflection while deflecting a ring sectionfrom the pipe diametrically at a constant speed until at least the specified deflection is achieved or priorfracture has occurredEach test piece is monitored during testing and subsequently inspected for signs of several specific types ofmechanical failureNOTE It is assumed that the following test parameters are set by the standard making reference to this InternationalStandard)if appropriate, a greater length of the test pieces than the length specified in ISo 9969, see Clause 6:|so2008-A2.、BS EN ISO 13968: 2008so13968:2008(E)5 Apparatu5.1 Compression testing machine, as specified in Iso 9969, but capable of producing at least thespecified diametric deflection of the test piece at the applicable speed (see ISo 9969: 2007, Table 1)diametric deflections up to at least the specified deflection and the corresponding compressive forces. asuring5.2 Dimensional and force measuring devices, conforming to Iso 9969, but capable of me6 Test piecesPrepare three test pieces from a single pipe, as specified in ISo 9969, and designate them a, b, and cspectively. The referring standard may specify longer test pieces than defined in ISo 99697 ConditioningCondition the test pieces as specified in ISo 99698 Procedure8.1 Conduct the test in accordance with the procedure given in Iso 9969, but continue compression whilemeasuring the change in either inside diameter or outside diameter until the specified deflection has beenachieved. Unless otherwise specified in the referring standard, the deflection shall be 30 %of the outsidediametered or the testiece has failed, whichIf desired, the deflection may be continued after a failure has occurred or the specified deflection has beeneached in order to determine other properties of the pipe8.2 For each test piece, prepare a force/deflection graph, and inspect and record the type and the positionof each event [a)to e)] with respect to the corresponding force and deflectiona) Inspect the force/deflection graph for compliance to the requirements in the referring standardb) Check for any cracking or crazing in any part of the wall structurec) Check for any wall delaminationd) Check for any permanent buckling in any part of the structure of the pipe walle)Make any other observation as specified in the referring standard.Whitening of the pipe shall not be considered as an indication of one of the above-mentioned mechanicalfailuresIso 2008-All rights reserved2.、BS EN ISO 13968: 2008lso13968:2008(E9 Test reportThe test report shall include at least the following informationa) a reference to this International Standard and to the referring standardb) the identification of the thermoplastics pipe, including1)manufacturer.2)type of pipe,dimensions4)production date,5 lengths of test pieces6) mass per metre length of the pipe;c)the test temperaturd) the force/deflection graph for each test piecee)where appropriate, the force and deflection at which any of the events specified in 8.2 occurredf) the deflection and force at the maximum point, if a maximum occurredg) any factors which may have affected the results, such as any incidents or any operating details notspecified in this International standard:h) the date of test|so2008-A2.、BS EN ISO 13968: 2008so13968:2008(E)Bibliography[1] EN 13476-1: 2007, Plastics piping systems for non-pressure underground drainage and sewerageStructured-wall piping systems of unplasticized poly(vinyl chloride)(PVC-U), polypropylene( PP)andpolyethylene(PE)-Part 1: General requirements and performance characteristics建筑o Iso 2008-All rights reserved2.、
本站所有资源由用户上传，仅供学习和交流之用；未经授权，禁止商用，否则产生的一切后果将由您自己承担！素材版权归原作者所有，如有侵权请立即与我们联系,我们将及时删除