1、BRITISH STANDARD BS EN ISO 16871:2003 Incorporating Corrigendum No. 1 Plastics piping and ducting systems Plastics pipes and fittings Method for exposure to direct (natural) weathering The European Standard EN ISO 16871:2003 has the status of a British Standard ICS 23.040.20; 23.040.45 BS EN ISO 168
2、71:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 23 June 2003 BSI 8 October 2003 ISBN 0 580 42067 1 National foreword This British Standard is the official English language version of EN ISO 16871:2003. It is identical with ISO 16871:2
3、003. The UK participation in its preparation was entrusted by Technical Committee PRI/88, Plastics piping systems, to Subcommittee PRI/88/4, Test methods, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-refe
4、rences The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of Britis
5、h Standards Online. 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 does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present
6、to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an insi
7、de front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 7, the Annex ZA page, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued
8、 since publication Amd. No. Date Comments 14780 Corrigendum No. 1 8 October 2003 Correction to EN ISO foreword page and addition of the Annex ZA pageEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO16871 May2003 ICS23.040.20;23.040.45 SupersedesEN1056:1996 Englishversion Plasticspipingandductings
9、ystemsPlasticspipesandfittings Methodforexposuretodirect(natural)weathering(ISO 16871:2003) Systmesdecanalisationsetdegainesenmatires plastiquesTubesetraccordsenmatiresplastiques Mthodepourlexpositiondirecteauxintempries(ISO 16871:2003) KunststoffRohrleitungsundSchutzrohrsystemeRohre undFormstckeaus
10、KunststoffenVerfahrenfrdie BewitterungimFreien(ISO16871:2003) ThisEuropeanStandardwasapprovedbyCENon5May2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibl
11、iographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotified
12、totheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom.
13、EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO16871:2003ECORRECTED20030924 Foreword Thisdocument(ENIS
14、O16871:2003)hasbeenpreparedbyTechnicalCommitteeISO/TC138 “Plasticspipes,fittingsandvalvesforthetransportoffluids“incollaborationwithTechnical CommitteeCEN/TC155“Plasticspipingsystemsandductingsystems“,thesecretariatofwhich isheldbyNEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eit
15、herbypublicationof anidenticaltextorbyendorsement,atthelatestbyNovember2003,andconflictingnational standardsshallbewithdrawnatthelatestbyNovember2003. ThisdocumentsupersedesEN1056:1996. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollowingcountriesareboundtoim
16、plementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnitedKingdom. Endorsementnotice ThetextofISO16871:2003hasbeenapprovedbyCENasENISO16871
17、:2003withoutany modifications. NOTENormativereferencestoInternationalStandardsarelistedinAnnexZA(normative). ENISO16871:2003 Reference number ISO 16871:2003(E)INTERNATIONAL STANDARD ISO 16871 First edition 2003-05-15 Plastics piping and ducting systems Plastics pipes and fittings Method for exposure
18、 to direct (natural) weathering Systmes de canalisations et de gaines en matires plastiques Tubes et raccords en matires plastiques Mthode pour lexposition directe aux intempries ENISO16871:2003IS:17861 O3002(E) DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In ccacnadrow eitA hebods l
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23、10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o groii ENISO16871:2003 iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Principle . 1 4 Apparatus. 2 5 Test pieces. 5 6 Procedure. 5 7 Test report 7 ENISO16871:2003iv Foreword ISO (the Interna
24、tional 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 technical committees. Each member body interested in a subject for which a technical committee has be
25、en established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical stan
26、dardization. International Standards are drafted in accordance with the rules given in the ISO/IEC 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 fo
27、r 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 al
28、l such patent rights. ISO 16871 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials and their accessories Test methods and basic specifications. ENISO
29、16871:2003 vIntroduction Outdoor exposure tests of the type specified in this International Standard are needed to evaluate the performance of plastics piping components or materials when exposed to direct sunlight. The results of such tests should be regarded only as an indication of the effect of
30、exposure to direct weathering by the method described. Results obtained after exposure for a given time may not be comparable to those obtained after other exposures of equal time using the same method. When identical materials are exposed at different times for extended periods of several years, th
31、ey generally show comparable behaviour after equal exposure intervals. However, even in long-term tests, the results may be affected by the season in which the tests are started. The results of short-term direct-weathering tests can give an indication of the relative outdoor performance, but should
32、not be used to predict the absolute long-term performance of a pipe, fitting or joint. Even results of tests carried out for longer than 24 months can show an effect of the season in which the exposure started. Comparisons of non-full-year exposures will exhibit seasonable effects. The test method c
33、hosen is usually designed to expose the material to the most severe conditions associated with any particular climate. It should, therefore, be borne in mind that the severity of exposure in actual use is, in most cases, likely to be less than that specified in this International Standard, and allow
34、ance should be made accordingly when interpreting the results. For example, vertical exposure at 90 from the horizontal is considerably less severe in its effects on plastics than near-horizontal exposure, particularly in tropical regions, where the sun is most powerful at high zenith angles. Surfac
35、es facing away from the equator are much less likely to be degraded than equator-facing surfaces because they are less exposed to solar radiation. However, the fact that they may remain wet for longer periods may be of significance for materials affected by moisture. ENISO16871:2003INTENRATIONAL TSA
36、NDADR IS:17861 O3002(E)1Plastics piping and ducting systems Plastics pipes and fittings Method for exposure to direct (natural) weathering 1 Scope This International Standard specifies a method for exposing plastics pipes and fittings, individually or assembled, or as pieces therefrom, to natural we
37、athering in order to assess changes. NOTE 1 The exposure is considered appropriate for evaluating components subject to yard storage prior to installation and use without further exposure to direct weathering, and is quantified to promote rationalization of exposure doses and comparability of data.
38、NOTE 2 For exposures appropriate to tropical or equatorial conditions, attention is drawn to ISO 877. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the la
39、test edition of the referenced document (including any amendments) applies. ISO 105-A02, Textiles Tests for colour fastness Part A02: Grey scale for assessing change in colour ISO 877:1994, Plastics Methods of exposure to direct weathering, to weathering using glass-filtered daylight, and to intensi
40、fied weathering by daylight using Fresnel mirrors ISO 2818, Plastics Preparation of test specimens by machining ISO 4582, Plastics Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources 3 Principle Test p
41、ieces, comprising all or part of a pipe section, a fitting or a jointed assembly, are mounted on a rack under specified conditions and directly exposed to natural weathering until a given minimum total solar radiant exposure per unit area has been received. Climatic conditions and incident radiation
42、 are monitored and reported during the exposure period in accordance with this International Standard or the referenced standards. If necessary (see Note 1), additional, comparable, test pieces are tested to establish initial values for one or more properties and/or are stored under protected condit
43、ions before testing to enable comparison of the property or properties with and without weathering. NOTE 1 Additional test pieces are unnecessary if the data required can be obtained only from exposed test pieces, e.g. by comparison of quantitative colour measurements before, during and/or after exp
44、osure or colour comparisons between masked and unmasked zones on the test piece. ENISO16871:20032 NOTE 2 It is assumed that the following test parameters are set by the standard making reference to this International Standard: a) if applicable, the ambient parameters to be recorded (see 4.2.2); b) t
45、he size, shape and method of preparation of test pieces (see 5.1); c) the number of test pieces to be exposed to weathering and, if applicable, to be stored as control test pieces (see 5.2 and 6.1); d) if applicable, the sampling procedure to be used (see 5.3); e) the solar energy per unit area (see
46、 6.2); f) the alignment of the pipe axes (see 6.2); g) the frequency and method of cleaning (see 6.3); h) if applicable, details of the property(ies) to be measured and the method of measurement, in accordance with the referring standard, and whether or not any shaped profiles (see 6.5) should be pr
47、epared before or after exposure (see 5.1 and 5.2). 4 Apparatus 4.1 Test piece support rack The rack shall conform to ISO 877 for the construction requirements and location of a rack having the following characteristics selected from ISO 877: a) it shall be constructed from inert materials which shal
48、l not affect the test results (see ISO 877:1994, Subclause 5.1); b) it shall be capable of supporting test pieces (see Clause 5) such that the exposed surface of the test piece is at 45 to the horizontal, facing the equator; c) there shall be no obstructions, including adjacent racks, in an easterly, westerly or equatorial direction, subtending
