1、BRITISH STANDARDBS EN 1297:2004Flexible sheets for waterproofing Bitumen, plastic and rubber sheets for roof waterproofing Method of artificial ageing by long term exposure to the combination of UV radiation, elevated temperature and water The European Standard EN 1297:2004 has the status of a Briti
2、sh StandardICS 91.100.50g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 1297:2004This British Standard was published under the authority of th
3、e Standards Policy and Strategy Committee on 29 December 2006 BSI 2006ISBN 0 580 49848 4National forewordThis British Standard was published by BSI. It is the UK implementation of EN 1297:2004. The UK participation in its preparation was entrusted by Technical Committee B/546, Flexible sheets for wa
4、terproofing and water vapour control, to Subcommittee B/546/2, Plastics and rubber sheets.A list of organizations represented on B/546/2 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
5、correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1297September 2004ICS 91.100.50English versionFlexible sheets for waterproofing - Bitumen, p
6、lastic and rubbersheets for roof waterproofing - Method of artificial ageing by longterm exposure to the combination of UV radiation, elevatedtemperature and waterFeuilles souples dtanchit - Feuilles dtanchit detoiture bitumineuses, plastiques et lastomres - Mthodede vieillissement artificiel par ex
7、position combine delongue dure aux rayonnements UV, la tempratureleve et leauAbdichtungsbahnen - Bitumen-, Kunststoff- undElastomerbahnen fr Dachabdichtungen - Verfahren zurknstlichen Alterung bei kombinierter Dauerbeanspruchungdurch UV-Strahlung, erhhte Temperatur und WasserThis European Standard w
8、as approved by CEN on 22 July 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such natio
9、nalstandards 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). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notifi
10、ed to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
11、 Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by
12、any means reservedworldwide for CEN national Members.Ref. No. EN 1297:2004: EEN 1297:2004 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Principle6 5 Apparatus .6 5.1 Laboratory light source.6 5.2 Test Chamber.6 5.3 Specimen arrangement
13、.6 5.4 Water supply and spray mechanism .6 5.5 Cycle timer7 5.6 Thermometer7 5.7 Radiometer .7 6 Sampling and preparation of test specimens.7 6.1 Sampling.7 6.2 Dimensions of test specimens.7 6.3 Preconditioning of specimens .7 7 Procedure .7 7.1 General7 7.2 Exposure cycle.7 7.3 Black standard temp
14、erature .7 7.4 Chamber heating7 7.5 Relative humidity .8 7.6 Procedure .8 8 Expression of results 8 9 Precision.8 10 Test report 8 Annex A (informative) Spectral irradiance of fluorescent UV lamps type I (340 nm) .9 Annex B (informative) Recommendations 10 Bibliography 11 EN 1297:2004 (E) 3 Foreword
15、 This document (EN 1297:2004) has been prepared by Technical Committee CEN /TC 254, “Flexible sheets for waterproofing“, the secretariat of which is held by BSI. This standard is one of a series of standards, which specify test methods for determining dimensions and characteristics of flexible sheet
16、s as factory made products. 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 2005, and conflicting national standards shall be withdrawn at the latest by March 2005. No existing European Stan
17、dard is superseded. This document includes a Bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Ge
18、rmany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 1297:2004 (E) 4 Introduction This document has been prepared by CEN/TC 254 ”Flexible sheets for waterpro
19、ofing” in order to test flexible bitumen, plastic and rubber sheets for roof waterproofing in relation to their ageing resistance to combined effects of long term exposure to UV radiation, elevated temperature and water. This document defines one common procedure to be applied as a method for artifi
20、cial ageing to all types of flexible sheets for roof waterproofing This document has been drafted for applications in roofing but it may also be applied to other areas where it is relevant. EN 1297:2004 (E) 5 1 Scope This document specifies the method for exposure of factory made bitumen or plastic
21、or rubber sheets for roof waterproofing to combined effects of long term exposure by UV radiation, elevated temperature and water as means of artificial ageing. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, onl
22、y the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13416, Flexible sheets for waterproofing Bitumen, plastic and rubber sheets for roof waterproofing Rules for sampling EN ISO 4892-1, Plastics Methods of exposure
23、to laboratory light sources Part 1: General guidance (ISO 4892-1:1999) EN ISO 4892-3, Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps (ISO 4892-3:1994) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. Symbol U
24、nit 3.1 fluorescent UV lamp lamp in which primary radiation from a low pressure mercury arc is transformed into higher wavelength UV by means of a fluorescent phosphor. The spectral emission of a fluorescent lamp is determined by the spectral emission of the fluorescent phosphor and the transmission
25、 characteristics of the glass tube. A fluorescent UV lamp is a lamp in which the radiant emission in the ultraviolet region of the spectrum 400 nm makes up at least 80 % of the total radiation output 3.2 irradiance incident radiant flux onto a surface per unit area E W / m 3.3 spectral irradiance ra
26、diant flux per unit area per wavelength interval EW/(mnm) 3.4 Radiant exposure time integral of irradiance H J/m 3.5 UV-radiation radiation with a wavelength between: 100 nm 400 nm nm EN 1297:2004 (E) 6 3.6 Exposed side side of the test specimen designated by the manufacturer to be exposed to the su
27、nlight 4 Principle Test specimens cut from the product sample are exposed in an apparatus with fluorescent UV lamps at specified irradiance, black standard temperature (BST), relative humidity and cyclic water spraying. The resistance to this exposure is determined by follow-up tests described in th
28、e product standards on flexible bitumen or plastic or rubber sheets for roof waterproofing. 5 Apparatus 5.1 Laboratory light source The UV source shall be an array of fluorescent UV lamps of type I (340 nm) or a fluorescent UV lamp combination in accordance with EN ISO 4892-3 with a mean UV irradian
29、ce in the plane of the specimen surfaces of (45 5) W/m in the wavelength range 300 nm. For typical spectral irradiances see Figure A.1. The irradiance at the test specimen surface shall not vary more than 10 % in relation to any two points in the specimen holder plane. In order to achieve homogeneou
30、s exposure conditions operate the apparatus according to the manufacturers instructions (e. g. replacement of lamps and repositioning of specimens) and use dummy specimens at void positions. 5.2 Test Chamber The design of the test chamber may vary but it shall be constructed from inert material and
31、provide for uniform irradiance in accordance to 5.1 with means for controlling the black standard temperature (BST) and relative humidity in the dry period. 5.3 Specimen arrangement The test specimen racks shall allow the specimens to lie flat in the plane 5 above the horizontal; be mounted so that
32、the exposed face is in the plane of uniform irradiance. The specimens shall be attached to stainless steel platens of at least the same size as the specimens by appropriate means. The attachment shall leave an area open to free irradiation so that subsequent tests can be performed on irradiated part
33、s of the specimen. For inclinations near to horizontal the specimens may be alternatively placed in stainless steel pans of at least the same size as the specimens. The specimens shall be weighted in this arrangement by means of a U shaped stainless frame. The external dimensions of the frame shall
34、correspond to the specimen size. The cross section of the steel frame shall be (5 0,5) mm by approximately 10 mm. The dimension of (5 0,5) mm stands for the width of the cross section, i. e. the plane that is in contact with the specimen. If the specimens are placed in pans, the lower end of the pan
35、s shall have sufficient slits or holes to avoid any collection of water. The attachment arrangement shall not restrain the test specimens from changes in dimensions during exposure. 5.4 Water supply and spray mechanism Demineralized water with a maximum conductivity of 500 S/m shall be used for spra
36、ying. In general the temperature of the water to be used in the spraying procedure shall be (25 5) C at the beginning of the spray cycle. Spray nozzles shall provide a uniform and continuous wetting of the exposed specimens sides for defined periods of time. The flow rate through the nozzles shall b
37、e (10 3) litres per min and m of the exposed specimen surface. EN 1297:2004 (E) 7 5.5 Cycle timer A continuously operating cycle timer or controller shall allow programming of the spray cycles. An hour meter shall be provided to record total time of operation and UV exposure. 5.6 Thermometer Thermom
38、eter capable of measuring the black standard temperature in accordance with EN ISO 4892-1, with means to record the temperature during each cycle. 5.7 Radiometer A radiometer to determine the UV radiant exposure in J/m in the wavelength region from 300 nm to 400 nm. 6 Sampling and preparation of tes
39、t specimens 6.1 Sampling For the purpose of this document, a complete undamaged roll of the sheet to be tested shall be selected in accordance with EN 13416. 6.2 Dimensions of test specimens Test specimens of sufficient size according to the follow-up test to be performed shall be cut from the test
40、piece in accordance with EN 13416. The machine direction should be indicated. Durable marks for dimensional measurements before and after exposure shall be applied to the test specimens. 6.3 Preconditioning of specimens Appropriate preconditioning of the specimens shall be carried out according to t
41、he tests to be performed as specified in the product standard on bitumen or plastic or rubber sheets. 7 Procedure 7.1 General The test specimens and the black standard thermometer shall be mounted in the specimen holders with their exposed sides facing the lamps (5.1). 7.2 Exposure cycle An exposure
42、 cycle has a duration of 360 min and consists of a 300 min dry period followed by a 60 min spray (wet) period in accordance with EN ISO 4892-3. Irradiation is not maintained during the wet period. 7.3 Black standard temperature The black standard temperature (BST) shall be at (60 3) C during the dry
43、 period. The air temperature in the test chamber (5.2) shall be controlled to a constant value such that the black standard temperature (BST) equals the required value after 30 min in the dry period. 7.4 Chamber heating During the spray period the chamber heating is turned off. EN 1297:2004 (E) 8 7.
44、5 Relative humidity The relative humidity during the dry period shall be (10 5) % after 30 min of the dry period. 7.6 Procedure Operate continuously, repeating the programmed cycle, except for servicing the instrument and inspection of test specimens. NOTE 1 The total amount of UV radiant exposure i
45、s specified in the relevant standards EN 13707and prEN 13956 (definitions and characteristics). Relevant recommendations are given in Annex B. NOTE 2 Eventual intermediate tests or observations are specified in the standards EN 13707and prEN 13956 (definitions and characteristics). Relevant recommen
46、dations are given in Annex B. 8 Expression of results Observe, compare and record the performance of test specimens unexposed and exposed regarding their visual change, mass change and crack formation. Any subsequent destructive tests shall be conducted according to the relevant product standards fo
47、r Bitumen, plastic and rubber sheets for roof waterproofing. 9 Precision The precision is not specified by this standard. No report on international laboratory tests of repeatability or reproducibility is available. An accuracy statement will be added to the next revision when sufficient laboratory
48、data, now in preparation, will be available. 10 Test report The test report shall include at least the following information: a) all details necessary to identify the product tested; b) a reference to this document (EN 1297:2004) and any deviation from it; c) information about the apparatus in accor
49、dance with Clause 5; d) information on sampling and details on preparation of test specimens in accordance with Clause 6; e) information on the test procedure in accordance with Clause 7 (7.1 to 7.5); f) the test results in accordance with Clause 8; g) date of the test. EN 1297:2004 (E) 9 Annex A (informative) Spectral irradiance of fluorescent UV lamps type I (340 nm) Key (y-axis) spectral irradiance, in W/(m2 nm) (x-axis) wavelength, in nm Figure A.1 Spectral irradiance of fluorescent UV lamps
