1、CEN EN*L05b 96 E 3404587 0337236 080 BRITISH STANDARD Plastics piping and ducting systems - Plastics pipes and fittings - Method for exposure to direct (natural) weathering The European Standard EN 1056 : 1996 has the status of a British Standard ICs 23.040.20 NO COPYING WITHOUT BSI PERMISSION EXCEP
2、T AS PERMITTED BY COPYRIGHT LAW BS EN 1056 : 1996 BS 2782 : Part 11 : Method 1107A : 1996 BS EX 1056 : 1996 Amd.No. Date This British Standard, having been prepared under the direction of the Sector Board for Materiais and Chemicals, was published under the authority of the Standards Board and comes
3、 into effect on 15 September 1996 O BSI 199 Text affected Committees responsible for this British .Standard The following BSI references relate to the work on this standard Committee reference PRY61 Draft for comment 93.305479 DC . ISBN O 580 25899 8 The preparation of this British Standard was entr
4、usted to Technical CommitLee PRV61, Plastics piping systems and components, upon which the following bodies were represented: British Gas plc Britkh Plastics Federation British Plumbing Fittings Manufacturem Association British Valve and Actuator Manufacturers Association Chartered institution of Wa
5、ter and Environmental Management Department of the Environment (British Board of Agrment) Department of the Environment (Building Research Establishment) Department of the Environment (Property and Buildings Directorate) Department of lkmsport Electricity Association Federation of Civil Engineering
6、Contmctors Health and Safety Executive Institute of Building Control Institute of Materials Institution of Civil Engineers Institution of Gas Engineers National Association of Plumbing, Heating and Mechanical Services Contractors Pipeline Industries Guild Plastics Land Drainage Manufacturers Associa
7、tion Society of British Gas Industries Society of British Water Industries Water Companies Association Water Services Association of England and Wales The following bodies were also represented in the drafting of the standard, through subcommittees and panels: ERA Technology Ltd. Engineering Equipme
8、nt and Materials Users Association RMRA Technology Ltd CEN EN*105b 96 3404589 0137238 953 = BS EN 1056 : 1996 Contents page Committees responsible Inside front cover National foreword ii Foreword 2 Introduction Method 1 Scope 2 Normative references 3 Pnnciple 4 Apparatus 5 Test pieces 6 Procedure 6
9、7 Testreport 6 Figures 1A mical exposure rack for plastics pipes 4 1B Schematic test arrangement north/south alignment 4 1C Schematic test asrangement eadwest alignment 4 2 Mounting of test pieces 5 * m * I O BSI 1996 1 CEN EN81056 9b 3404589 0337239 8T H BS EN 1056 : 1996 National foreword This Bri
10、tish Standard has been prepared by Technical Committee PRY61 and is the English language version of EN 1056 : 1996 Plastics piping and ducting systems - Plastics pipes and fittings - Method for exposure to direct (natuml) weathering, published by the European Committee for Standardization (CEN). It
11、is incorporated into BS 2782 Methods of testiny plastics : Part 11 : Th,errnophtics pipes, fittinys and valves, as Method 1107A : 1996, for association with related test methods for plastics materials and plastics piping components. This test method has been prepared for reference by other standards
12、 under prepaxation by CEN for specification of plastics piping systems and components. It has been implemented to enable experience of the test method to be gained and for use for other fresh applications. It is also for use for the revision or amendment of other national standards as practicable, b
13、ut it should not be presumed to apply to any existing standard or specification which contains or makes reference to a different test method until that standardspecification has been amended or revised to make reference to this Method and any requirements are austed as appropriate. No existing Briti
14、sh Standard is superseded by this Method. Cross-references Publication referred to IS0 105A02 : 1993 Corresponding British Standard BS EN 20105 Textiles - Tests for colour fastness BS EN 20105A02 : 1995 Grey scale for assessing change in cohr BS 2782 Methods of testing plastics Part 5 Optical and co
15、our properties, weathering Method 552A : 1981 Determination of chnyes in colour and variations in pmpdies am exposure to duylight under yhs, natural weathering or artificial light IS0 4582 : 1980 NOTE. There is no British Standard identical to IS0 877 : 1994 pending the revision of BS 2782 : Part 5
16、: Method 540A : 1977, which is identical with IS0 877 : 1976. There is no British Standard identical to IS0 2818 : 1994 pending the revision of BS 2782 : Part 9 : Method 1977, which is identical with IS0 2818 : 1974. Warning note. This British Standard, which is identical with EN 1056 : 1996, does n
17、ot necessarily detail ali the precautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974. Attention should be paid to any appropriate safety precautions and the test method should be operated only by trained personnel. Compliance with a British Standard does not of
18、 itself confer immunity from legal obligations. CEN ENu3056 96 W 3404589 0337240 503 W EUROPW STANDARD NOEUMI3 EUR0PEE?E EXROPAISCHE NORM EN 1056 March 1996 ICs 23.040.20 Descriptors: plastic tubes, pipe fittings, ageing tests: materials, weather resistance English version Plastics piping and ductin
19、g systems - Plastics pipes and fittmgs - Method for exposure to direct (M) weathering Systmes de canalisations et de gaines en plastiques - ?hbes et raccords en plastiques - Mthode pour l?exposition directe aux intempries Kumktoff-Ftohrleitungs- und Schutzrohrsysteme - Rohre und Formstcke aus Kunsts
20、toffen - Verfahren fur die Bewittrung im Freien This European Standard was approved by CEN on 1996-01-26. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration
21、. Up-to-date lists and bibiiographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). Aversion in any other language made by translation
22、under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, F?rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Net
23、herlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Centrai Secretariat: rue de Stassart 36, B-1060 Brussels O 1996 Copyright reserved to CEN members Ref. No. EN 1056 : 199
24、6 E Page 2 EN 1056 : 1996 Foreword This European Standard has been prepared by Technical Committee CEN/TC 155, Plastics piping systems and ducting systems, the secretariat of which is held by NNI. This European Standard shall be given the status of a national standard, either by publication of an id
25、entical text or by endorsement, at the latest by September 1996, and conflicting national standards shall be withdrawn at the latest by September 1996. This standard is based on IS0 877 : 1994 Plastics - Methods of exposure to direct weathering, to weathering using ghs-f2kred daylight, and to intens
26、ifGd weathering by daylight .using Fresnel mirrors, published by the International Organization for Standasdization OSO). It is a modification of those methods for reasons of applicability to plastics pipes and fittings andor other test conditions and alignment with texts of other standards on test
27、methods. The modifications are: - test conditions related to tropical exposures are omitted; - requirements for test pieces are confined to those relevant to pipes and fittings; - appropriate tolerances are introduced for the measurement of climatic data; - a specific radiant energy dose is given fo
28、r use for evaluating piping components which may be exposed during typical storage prior to instabtion; - editorial changes have been introduced. The materialdependent pasametern andor performance requirements are incorporated in the System Standard(s) concerned. This standard is one of a series of
29、standards on test methods which support System Standards for plastics piping systems and ducting systems. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aus Belgium, Denmark, Finland, Fr
30、ance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwax Portugal, Spain, Sweden, Switzerland and the United Kingdom. Introduction Outdoor-exposure tests of the type specified in this standard are needed to evaluate the performance of plastics piping components or materials wh
31、en exposed to daylight. The results of such tests should be regarded only as an indication of the effect of 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 sa
32、me method. When identical materiais are exposed at different times for extended periods of several years, they generally show comparable behaviour after equal-exposure intervais. However, even in long-term tests, the results may be affected by the season in which the tests ase started. The resuits o
33、f short-term direct weathering tests can give an indication of the relative outdoor performance, but should 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
34、 exposure started. Comparisons of non-full-year exposure wiu exhibit seasonable effects. The test method chosen 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 act
35、ual use is, in most cases, likely to be less than that specified in this standard, and allowance 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, p
36、arth.ary in tropical regions, where the sun is most powerful at high zenith anges. Polar-facing surfaces 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 signific
37、ance for materiais affected by moisture. CEN EN*3056 96 I 3404589 0337242 384 1 scope This standard specifies a method for exposing plastics pipes and fittings, individually or assembled, or as pieces therefrom, by direct exposure to natural weathering in order to assess changes produced after speci
38、fied weathering exposure stages relevant to European latitudes. NOTE. For exposure appropriate to tropical or equatorial conditions. attention is drawn to IS0 877. 2 Nonnative references This standard incorporates by dated or undated reference, provisions fi-om other publications. These nonnative re
39、ferences are cited at the appropriate places in the text and the publications are iisted hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to this standard oniy when incorporated in it by amendment or revision. For undated references the late
40、st edition of the publication referred to applies. IS0 105-AO2 : Tmtiles - Tats for colourfastness - 1993 Part A02: Grey scale for assessing change in colour IS0 877 : 1994 Plastics - Methods of exposure to direct weathering, to weathering using glassfiltered daylight, and to intensi,fzed wea#m%ng b
41、y daylight using Fresnel mirrors IS0 2818 : 1994 Plastics - Preparation of test specimens by mhining IS0 4582 : 1980 Plastics - Determination of changes in colour and variations in propdies after exposure to daylight under gks, natural weathering or artifM light Page 3 EN 1056 : 1996 3 Principle Tes
42、t pieces, 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 the rack has received a given minimum total solar radiant exposure per unit area Climatic conditions and variations a
43、nd the radiation dosage during exposure are monitored and reported in accordance with the referenced standards. If necessary (see note i), additional, comparable, test pieces are tested to establish initial values for one or more properties andor are stored under protected conditions before testing
44、to enable comparison of the property(ies) 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 exposure or colour comparisons
45、between masked and unmasked zones on the test piece. NOTE 2. It is assumed that the following test parameters are set by the standard making reference to this standard a) if applicable, the ambient parameters to be recorded (see 4.2.2) b) the size, shape and method of preparation of test pieces (see
46、 5.1); c) the number of test pieces to be exposed to weathering and, if applicable, to be stored as control test pieces (see 6.2 and 6.1); d) if applicable, the sampling procedure to be used (see 5.3); e) the solar energy per unit area, if other than 3,5 GJ/m2 (see 6.2); f) the alignment of the pipe
47、 axes, if not noMsouth (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 prepared before or af
48、ter exposure (see 5.1 and 5.2). CEN EN*l105b 96 3404589 0137243 210 Page 4 EN 1056 : 1996 4 Apparatus 4.1 Test piece support rack The rack shaU conform to IS0 877 for the construction requirements and location of a rack having the following characteristics selected from IS0 877 c) there shall be no
49、obstructions, including Gacent racks, in an easterly, westerly or equatorial direction, subtending a vertical angle greater than 20“C, or in a polar direction an angle greater than 45“; d) it shall have mounting fixtures that are secure but apply as little stress as possible to the test pieces and permit shrinkage, expansion or warpage to occur without constraint greater than would apply in a) it shall be constructed from inert materials which shall not affect the test results (see 5.1 of IS0 877); b) it shall be capable of supporting test pieces (see clause 5
