ISO INTERNATIONAL STANDARD 13229 First edition 2010-03-15 Thermoplastics piping systems for non-pressure applications Unplasticized poly(vinyl chloride) (PvVC-U) pipes and fittings Determination ofthe viscosity numberandK-value Systemesdecanalisationsthermoplastiquespourapplications sans pression-Tubes et raccords en poly(chlorure de vinyle) non plastifie (PvC-U)Determination de I'indice de viscosite reduite et de lavaleurK Reference number ISO 13229:2010(E) @ISO2010 Not for Resale hout license from IHS ISO 13229:2010(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 non-governmental, in liaison with IsO, also take part in the work. IsoO collaborates closely y with the 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. 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. ISO13229waspreparedbyTechnical CommitteeISO/TC138,Plasticspipes,fittingsandvalves for the drainage). ili Not for Resale arda Not fr Resale INTERNATIONALSTANDARD ISO 13229:2010(E) Thermoplastics piping systems for non-pressure applications Unplasticized poly(vinyl chloride) (PvC-U) pipes and fittings Determination of the viscosity number and K-value 1 Scope This International Standard specifies a method for the determination of the viscosity number (also known as reduced viscosity) and K-value of an unplasticized poly(vinyl chloride) (PVC) resin derived from a pipe, fitting orcompound. In this International Standard, only the method for isolation (or separation) of the PvC resin is detailed, while the determination of the viscosity number is given in IsO 1628-2. The presence of other additives or polymers can invalidate this method (see Clause 3) 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. ISO 1628-2,Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometersPart 2: Poly(vinyl chloride) resins Principle additives by dissolution in tetrahydrofuran (THF) and precipitation by methanol from a portion of the solution that has been isolated by centrifuging and decantation. The presence of additives in injection-moulding compounds can affect the results for materials for/from injection-moulded fittings. If other polymers soluble in THF and insoluble in methanol (e.g. PMMA material) are present, this method shall not be used. The precipitate is used for estimation of the viscosity number and K-value in accordance with IsO 1628-2. 4 Reagentsforisolationor separation of thePvC resin 4.1 Tetrahydrofuran (THF), stabilized. WARNING-It is very important for safety reasons that personal protective clothing be used when applying solvents to the test specimen. The use of solvents in regard to application of this InternationalStandardmaybefurthercontrolledunder nationaland/orregional legislation.In particular, the THF used shall be collected, stored and sent to solvent recovery. 4.2 Methanol. lonal organizanon fe standardalonghts reserved Copyright Intern ISO13229:2010(E) 5 ApparatusforisolationorseparationofthePvC resin 5.1 Glass container, of min