Coil coated metals Test methods

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1 BRITISH STANDARD BS EN :2001 Coil coated metals Test methods Part 10: Resistance to fluorescent UV light and water condensation The European Standard EN :2001 has the status of a British Standard ICS ; NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

2 BS EN :2001 National foreword This British Standard is the official English language version of EN :2001. The UK participation in its preparation was entrusted to Technical Committee STI/27, Paint systems for metallic substrates, which has the responsibility to: aid enquirers to understand the text; present to the responsible 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. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 March 2001 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments BSI ISBN

3 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN January 2001 ICS ; English version Coil coated metals - Test methods - Part 10: Resistance to fluorescent UV light and water condensation Tôles prélaquées - Méthodes d'essai - Partie 10: Résistance aux UV fluorescentes et à la condensation de l'eau Bandbeschichtete Metalle - Prüfverfahren - Teil 10: Beständigkeit gegen fluoreszierende UV-Strahlung und Kondensation von Wasser This European Standard was approved by CEN on 30 December CEN members are bound to comply with the CEN/CENELEC Internal 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 Management Centre or to any CEN 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN :2001 E

4 Page 2 EN :2001 Foreword This European Standard has been prepared by Technical Committee CEN/TC 139 "Paints and varnishes", the secretariat of which is held by DIN. 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 July 2001, and conflicting national standards shall be withdrawn at the latest by July According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 1 Scope This part of EN describes the basic principles and procedure for determining the resistance of an organic coating on a metallic substrate to a combination of fluorescent UV light and water condensation. Due to varied conditions which occur during natural weathering and the extreme nature of accelerated testing, correlation between the two cannot be expected. Not all organic coatings will perform on an equal basis but a degree of correlation between the same generic type may be observed. 2 Normative references This European 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. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN :2001 Coil coated metals Test methods Part 0: General introduction and list of test methods EN :2001 Coil coated metals Test methods Part 2: Specular gloss EN :2001 Coil coated metals Test methods Part 3: Colour difference Instrumental comparison pren :1999 Coil coated metals Test methods Part 14: Chalking (Helmen method) EN 23270:1991 Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing (ISO 3270:1984) ISO 11507:1997 Paints and varnishes Exposure of coatings to artificial weathering Exposure to fluorescent UV and water 3 Terms and definitions For the purposes of this Part of EN the terms and definitions given in EN :2001 apply. 4 Principle The coating is exposed in a cyclic manner to UV light, water and temperature under controlled conditions. One of two types of fluorescent UV lamps, UVA or UVB, are used. After exposure to UV light under controlled conditions chalking and changes in gloss and colour are assessed. 5 Apparatus 5.1 Test chamber The test chamber shall be constructed of corrosion resistant materials. Enclosed within the test chamber shall be eight fluorescent lamps (5.2), a heater pan, racks for test specimens, and provisions for indicating and controlling operating times and temperatures.

5 Page 3 EN :2001 The lamps shall be in banks of four on either side of the cabinet. Electrical operating conditions for the lamps shall be as given by the manufacturer. 5.2 UV lamps Either UVA or UVB, as specified in ISO 11507:1997: UVA starting at approximately 300 nm with a peak emission of 340 nm; UVB starting at approximately 280 nm with a peak emission at 313 nm. 5.3 Water supply either distilled or deionized water. 6 Sampling See EN : Test panels See EN :2001. The test specimens shall normally be flat and 150 mm 75 mm in size. NOTE: Deviations from the standard methods of panel shape, size, previous working, or conditioning may be agreed between the interested parties. 8 Procedure 8.1 Place the test specimens in racks which are made of inert material. Expose the face of the test specimens parallel to the lamps at a distance of 50 mm from the nearest surface of the lamp. 8.2 If there are empty spaces within the racks fill these with blanks to maintain the conditions within the test chamber. 8.3 Cycle the test specimens through periods of 4 h of dry UV exposure at a black standard temperature of (60 ± 3) C, followed by a period of 4 h of water condensation exposure, without radiation, at a black standard temperature of (40 ± 3) C. (One cycle consists of 8 h exposure.) 8.4 Arrange the test specimens to allow the condensate to freely run off the surface under gravity. 8.5 After every usage period of 400 light hours replace one lamp and rotate the others within the bank with the oldest lamp being taken out of service unless otherwise specified by the equipment manufacturer. 8.6 Conclude the exposure at an agreed time, for example 2000 h for UVA or 1000 h for UVB, or an agreed number of cycles, for example 250 cycles for UVA or 125 cycles for UVB. 8.7 At the conclusion of the exposure evaluate the test specimens for chalking, changes of gloss and colour. Assess the coating for chalking, change of gloss and change of colour at ambient temperature. For more accurate measurements, as required for instance in case of dispute, the temperature shall be (23 ± 2) C and the relative humidity (50 ± 5) %, in accordance with EN : Expression of results The results shall be expressed as comparison between an unexposed test specimen and an exposed test specimen for properties defined in EN :2001, EN :2001, pren :1999 (see also the document in preparation, WI , Part 22 of this Standard), if appropriate in terms of, for example, x % gloss retention according to EN :2001, ΔE* ab = y according to EN :2001, z chalking according to pren :1999.

6 Page 4 EN : Precision No precision data are currently available. 11 Test report The test report shall contain at least the following information: a) all details necessary to identify the product tested; b) a reference to this part of EN (EN ); c) the type of UV lamps used; d) the duration of exposure in hours; e) the results of the test, as indicated in clause 9; f) any deviation from the test method specified (panel shape, size, previous working or conditioning and any other changes); g) the date of the test.

7 Page 5 EN :2001 Bibliography EN 1396:1996 Aluminium and aluminium alloys Coil coated sheet and strip for general applications Specifications EN :1996 Continuously organic coated (coil coated) steel flat products Part 1: General information (definitions, materials, tolerances, test methods) ENV :1999 Continuously organic coated (coil coated) steel flat products Part 2: Products for building exterior applications ISO :1994 Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps WI Coil coated metals Test methods Part 22: Colour difference Visual comparison

8 BS EN :2001 BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: Fax: BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: Fax: Standards are also available from the BSI website at In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: Fax: Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: Fax: Further information about BSI is available on the BSI website at Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. BSI 389 Chiswick High Road London W4 4AL If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:

Hexagon nuts Ð Product grade C

Hexagon nuts Ð Product grade C BRITISH STANDARD BS EN ISO 4034:2001 The European Standard EN ISO 4034:2000 has the status of a British Standard ICS 21.060.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Hexagon