1、BS EN ISO13229:2011ICS 23.040.20; 91.140.80NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDThermoplastics pipingsystems for non-pressure applications Unplasticizedpoly(vinyl chloride)(PVC-U) pipesand fittings Determination of theviscosity number andK-valueNation
2、al forewordThis British Standard is the UK implementation of EN ISO 13229:2011. It supersedes BS EN 922:1995 and BS ISO 13229:2010, which are withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/88/1, Plastics piping for non-pressure applications.A list of organ
3、izations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligatio
4、ns. BS EN ISO 13229:2011This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 June2010 BSI 2011ISBN 978 0 580 73955 2Amendments/corrigenda issued since publicationDate Comments 31 October 2011 This corrigendum renumbers BS ISO 13229:2010 as BS EN IS
5、O 13229:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13229 September 2011 ICS 23.040.20; 91.140.80 Supersedes EN 922:1994English Version Thermoplastics piping systems for non-pressure applications - Unplasticized poly(vinyl chloride) (PVC-U) pipes and fittings - Determination of the
6、viscosity number and K-value (ISO 13229:2010) Systmes de canalisations thermoplastiques pour applications sans pression - Tubes et raccords en poly(chlorure de vinyle) non plastifi (PVC-U) - Dtermination de lindice de viscosit rduite et de la valeur K (ISO 13229:2010) Rohrleitungssysteme aus Thermop
7、lasten fr drucklose Anwendungen - Rohre und Formstcke aus weichmacherfreiem Polyvinylchlorid (PVC-U) - Bestimmung der Viskosittszahl und Berechnung des K-Wertes (ISO 13229:2010) This European Standard was approved by CEN on 11 August 2011. CEN members are bound to comply with the CEN/CENELEC Interna
8、l 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 standards may be obtained on application to the CEN-CENELEC Management Centre or to any CE
9、N member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versi
10、ons. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slo
11、venia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN
12、national Members. Ref. No. EN ISO 13229:2011: EForeword The text of ISO 13229:2010 has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 13229
13、:2011 by Technical Committee CEN/TC 155 “Plastics piping systems and ducting systems” the secretariat of which is held by NEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2012, and confl
14、icting national standards shall be withdrawn at the latest by March 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This documen
15、t supersedes EN 922:1994. 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
16、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 13229:2010 has been approved by CEN as a EN ISO 13229:2011 without any mo
17、dification. BS EN ISO 13229:2011 EN ISO 13229:2011 (E)INTERNATIONAL STANDARD1Thermoplastics 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 met
18、hod 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 or compound. In this International Standard, only the method for isolation (or separation) of the PVC resin is detailed, w
19、hile 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). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only t
20、he 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 viscometers Part 2: Poly(vinyl chloride) resins 3 Principle A PVC res
21、in, contained in a sample taken from a pipe, a fitting or a compound, is separated from most 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-m
22、oulding 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 accord
23、ance with ISO 1628-2. 4 Reagents for isolation or separation of the PVC 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
24、this International Standard may be further controlled under national and/or regional legislation. In particular, the THF used shall be collected, stored and sent to solvent recovery. 4.2 Methanol. BS EN ISO 13229:2011 EN ISO 13229:2011 (E) ISO 2011 2 5 Apparatus for isolation or separation of the PV
25、C resin 5.1 Glass container, of minimum capacity 100 ml. 5.2 Magnetic stirrer, with an adjustable speed of 0 r/min to 1 200 r/min. 5.3 Glass beaker, of capacity 600 ml, tall form. 5.4 Filter funnel. 5.5 Laboratory filter paper, capable of retaining polymer precipitated in accordance with 6.1. 5.6 Ce
26、ntrifuge with tubes, for 50 ml. 5.7 Vacuum dessicator. 5.8 Water bath, if necessary (see 6.1). 5.9 Pasteur pipette, if necessary (see 6.1). 6 Procedure 6.1 Isolation or separation of the PVC resin Take approximately 2 g of PVC compound (2,5 g if the filler content is expected to be high), cut, if ne
27、cessary, from the pipe or fitting tested. Dissolve it in approximately 50 ml of THF in the glass container (5.1) by stirring. If the dissolution occurs slowly, warm carefully in a water bath (5.8). The PVC resin shall be completely dissolved before continuing the procedure. Transfer the solution to
28、a tube of the centrifuge (5.6) and operate the centrifuge for approximately 40 min. Decant that part of THF solution free of particles into the glass beaker (5.3), if necessary using a pasteur pipette (5.9), without entraining any filler. In the beaker, precipitate the polymer by carefully adding me
29、thanol and stirring, until 10 parts of methanol have been added per part of THF solution. Filter the suspension using a filter paper (5.5) and wash the precipitate with methanol. Transfer the precipitated polymer, but not the filter paper, to a bowl and dry at 50 C for at least 12 h in the vacuum de
30、ssicator (5.7). 6.2 Determination of the viscosity number Determine and record the viscosity number, in millilitres per gram, in accordance with ISO 1628-2 using a resin sample of (0,250 0,000 25) g by dissolution in cyclohexanone. BS EN ISO 13229:2011 EN ISO 13229:2011 (E) ISO 2011 37 Calculation o
31、f K-value Calculate the K-value of the PVC resin using Equation (1): 0,50001, 5 l g 1 1 4 0 2 1, 5 l g 1, 5 l g1 000151,5tttK+ + += (1) where t is the efflux time of the solution, in seconds; t0is the efflux time of the solvent, in seconds. Annex A gives the relation between the K-value and the visc
32、osity number (reduced viscosity) for PVC resin. 8 Accuracy The accuracy of the method for the determination of the K-value is 2. 9 Test report The test report shall include the following information: a) a reference to this International Standard, i.e. ISO 13229:2010, and the referring standard; b) c
33、omplete identification of the pipe, fitting or compound tested; c) the viscosity number; d) the K-value; e) any factor that could have affected the results, such as any incident or any operating details not specified in this International Standard; f) the date of the test. BS EN ISO 13229:2011 EN IS
34、O 13229:2011 (E) ISO 2011 4 Annex A (informative) Relationship between K-value and viscosity number for PVC resin For a PVC resin, the K-value according to Fikentscher1is calculated according to Equation (1). For convenience, the K-values corresponding to a viscosity number from 60 ml/g to 178 ml/g
35、for a solution in cyclohexanone containing 5 g resin/litre are given in Table A.1. Table A.1 Viscosity numbers and corresponding K-values Viscosity number ml/g K-value Viscosity numberml/g K-value Viscosity number ml/g K-value 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 49,6 50,5 51,
36、3 52,1 52,8 53,6 54,3 55,1 55,8 56,5 57,2 57,9 58,5 59,2 59,8 60,5 61,1 61,7 62,3 62,9 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 63,5 64,1 64,7 65,2 65,8 66,3 66,9 67,4 67,9 68,5 69,0 69,5 70,0 70,5 71,0 71,5 71,9 72,4 72,9 73,3 140 142 144 146 148 150 152 154 1
37、56 158 160 162 164 166 168 170 172 174 176 178 73,8 74,3 74,7 75,1 75,6 76,0 76,5 76,9 77,3 77,7 78,1 78,5 78,9 79,3 79,7 80,1 80,5 80,9 81,3 81,7 BS EN ISO 13229:2011 EN ISO 13229:2011 (E) ISO 2011 5Bibliography 1 FIKENTSCHER, H. Cellulosa chemie, No. 13, 1932, pp. 58-64 BS EN ISO 13229:2011 EN ISO
38、 13229:2011 (E) ISO 2011 ICS 23.040.20; 91.140.80 Price based on 5 pages BS EN ISO 13229:2011 EN ISO 13229:2011 (E) ISO 2011This page has been intentionally left blank BSI GroupHeadquarters 389 Chiswick High Road, London, W4 4AL, UK Tel +44 (0)20 8996 9001 Fax +44 (0)20 8996 7001 standardsBSI - Bri
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