1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1056 : 1996 BS 2782
2、 : Part 11 : Method 1107A : 1996 The European Standard EN 1056 : 1996 has the status of a British Standard ICS 23.040.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Plastics piping and ducting systems Plastics pipes and fittings Method for exposure to direct (natural) weat
3、heringThis British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 September 1996 BSI 1996 The following BSI references relate to the work on this standard: Commit
4、tee reference PRI/61 Draft for comment 93/305479 DC ISBN 0 580 25899 8 BS EN 1056 : 1996 Amendments issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PRI/61, Plastics pip
5、ing systems and components, upon which the following bodies were represented: British Gas plc British Plastics Federation British Plumbing Fittings Manufacturers Association British Valve and Actuator Manufacturers Association Chartered Institution of Water and Environmental Management Department of
6、 the Environment (British Board of Agre ment) Department of the Environment (Building Research Establishment) Department of the Environment (Property and Buildings Directorate) Department of Transport Electricity Association Federation of Civil Engineering Contractors Health and Safety Executive Ins
7、titute 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 Association Society of British Gas Industries Soc
8、iety 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 Equipment and Materials Users Association RAPRA T
9、echnology Ltd.BS EN 1056 : 1996 BSI 1996 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Introduction 3 Method 1 Scope 3 2 Normative references 3 3 Principle 3 4 Apparatus 4 5 Test pieces 5 6 Procedure 6 7 Test report 6 Figures 1A Typical exposure rack for p
10、lastics pipes 4 1B Schematic test arrangement north/south alignment 4 1C Schematic test arrangement east/west alignment 4 2 Mounting of test pieces 5ii BSI 1996 BS EN 1056 : 1996 National foreword This British Standard has been prepared by Technical Committee PRI/61 and is the English language versi
11、on of EN 1056 : 1996 Plastics piping and ducting systems Plastics pipes and fittings Method for exposure to direct (natural) weathering, published by the European Committee for Standardization (CEN). It is incorporated into BS 2782 Methods of testing plastics : Part 11 : Thermoplastics pipes, fittin
12、gs 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 under preparation by CEN for specification of plastics piping systems and components. It has bee
13、n 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, but it should not be presumed to apply to any existing standard or specification which contains or
14、 makes reference to a different test method until that standard/specification has been amended or revised to make reference to this Method and any requirements are adjusted as appropriate. No existing British Standard is superseded by this Method. Cross-references Publication referred to Correspondi
15、ng British Standard BS EN 20105 Textiles Tests for colour fastness ISO 105-A02 : 1993 BS EN 20105-A02 : 1995 Grey scale for assessing change in colour BS 2782 Methods of testing plastics Part 5 Optical and colour properties, weathering ISO 4582 : 1980 Method 552A : 1981 Determination of changes in c
16、olour and variations in properties after exposure to daylight under glass, natural weathering or artificial light NOTE. There is no British Standard identical to ISO 877 : 1994 pending the revision of BS 2782 : Part 5 : Method 540A : 1977, which is identical with ISO 877 : 1976. There is no British
17、Standard identical to ISO 2818 : 1994 pending the revision of BS 2782 : Part 9 : Method 1977, which is identical with ISO 2818 : 1974. Warning note. This British Standard, which is identical with EN 1056 : 1996, does not necessarily detail all the precautions necessary to meet the requirements of th
18、e 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 itself confer immunity from legal obligations.CEN European Committee for Standard
19、ization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 1056 : 1996 E EUROPEAN STANDARD EN 1056 NORME EUROPE ENNE EUROPA ISCHE NORM March 1996 ICS 23.040.20 Descriptors: p
20、lastic tubes, pipe fittings, ageing tests: materials, weather resistance English version Plastics piping and ducting systems Plastics pipes and fittings Method for exposure to direct (natural) weathering Syste mes de canalisations et de gaines en plastiques Tubes et raccords en plastiques Me thode p
21、our lexposition directe aux intempe ries Kunststoff-Rohrleitungs- und Schutzrohrsysteme Rohre und Formstu cke aus Kunststoffen Verfahren fu r die Bewitterung im Freien This European Standard was approved by CEN on 1996-01-26. CEN members are bound to comply with the CEN/CENELEC Internal Regulations
22、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 Central Secretariat or to any CEN member. This European
23、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 Central Secretariat has the same status as the official versions. CEN members are the national
24、standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1056 : 1996 BSI 1996 Foreword This European Standard has been prepared by Technical Committee C
25、EN/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 identical text or by endorsement, at the latest by September 1996, and conflicting national standards
26、shall be withdrawn at the latest by September 1996. This standard is based on ISO 877 : 1994 Plastics Methods of exposure to direct weathering, to weathering using glass-filtered daylight, and to intensified weathering by daylight using Fresnel mirrors, published by the International Organization fo
27、r Standardization (ISO). It is a modification of those methods for reasons of applicability to plastics pipes and fittings and/or other test conditions and alignment with texts of other standards on test methods. The modifications are: test conditions related to tropical exposures are omitted; requi
28、rements 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 for use for evaluating piping components which may be exposed during typical storage prior to installation
29、; editorial changes have been introduced. The material-dependent parameters and/or performance requirements are incorporated in the System Standard(s) concerned. This standard is one of a series of standards on test methods which support System Standards for plastics piping systems and ducting syste
30、ms. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain
31、, 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 when exposed to daylight. The results of such tests should be regarded only as an indication of t
32、he 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 same method. When identical materials are exposed at different times for extended periods of seve
33、ral years, they 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
34、, 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 exposure started. Comparisons of non-full-year exposure will exhibit seasonable effects. The t
35、est 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 actual use is, in most cases, likely to be less than that specified in this standard, and allowan
36、ce 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. Polar-fa
37、cing 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 significance for materials affected by moisture.Page 3 EN 1056 : 1996 BSI 1996 1 Scope This standar
38、d 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 specified weathering exposure stages relevant to European latitudes. NOTE. For exposure appropriate to
39、tropical or equatorial conditions, attention is drawn to ISO 877. 2 Normative references This standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter.
40、 For dated references, subsequent amendments to, or revisions of, any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ISO 105-A02 : 1993 Textiles Tests for colour fas
41、tness 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 intensified weathering by daylight using Fresnel mirrors ISO 2818 : 1994 Plastics Preparation of test specimens by machining
42、 ISO 4582 : 1980 Plastics Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or artificial light 3 Principle Test pieces, comprising all or part of a pipe section, a fitting or a jointed assembly, are mounted on a rack under spe
43、cified 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 and the radiation dosage during exposure are monitored and reported in accordance with the referenced standards. If
44、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 conditions before testing to enable comparison of the property(ies) with and without weathering. NOTE 1. Additional test pieces are unnecess
45、ary 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 between masked and unmasked zones on the test piece. NOTE 2. It is assumed that the following test parameters are
46、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 5.1); c) the number of test pieces to be exposed to weathering and, if applicable, to be stored as control test
47、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, if other than 3,5 GJ/m 2 (see 6.2); f) the alignment of the pipe axes, if not north/south (see 6.2); g) the frequency and method of cleaning (see 6.3); h) if applicable, detail
48、s 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 after exposure (see 5.1 and 5.2).Page 4 EN 1056 : 1996 BSI 1996 D Removable metal rack, 1600 mm3 2250 mm A Supp
49、ort for rack B Removable carrier bars Dimensions in millimetres Figure 1A. Typical exposure rack for plastics pipes D Removable metal rack, D Removable metal rack, 1600 mm3 2250 mm 1600 mm3 2250 mm Figure 1B. Schematic test arrangement north/south alignment Figure 1C. Schematic test arrangement east/west alignment 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 sh
