1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationFibre-cement slates and fittings Product specification and test methodsBS EN 492:2012National forewordThis British Standard is the UK implementation of EN 492:2012. It supersedes
2、 BS EN 492:2004, which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee B/542, Roofing and cladding products for discontinuous laying, to Subcommittee B/542/4, Fibre reinforced cement sheeting for roofing.A list of organizations represented on this committee
3、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 correct application. The British Standards Institution 2012.Published by BSI Standards Limited 2012.ISBN 978 0 580 72596 8 ICS 91.100.40C
4、ompliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 492:2012EUROP
5、EAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 492 October 2012 ICS 91.100.40 Supersedes EN 492:2004English Version Fibre-cement slates and fittings - Product specification and test methods Ardoises en fibres-ciment et leurs accessoires en fibres-ciment - Spcification du produit et mthodes dessai F
6、aserzement-Dachplatten und dazugehrige Formteile - Produktspezifikation und Prfverfahren This European Standard was approved by CEN on 4 August 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
7、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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, Germa
8、n). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia,
9、 Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and Unite
10、d Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 492:2012: EBS
11、 EN 492:2012EN 492:2012 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms and definitions .64 Symbols and abbreviations 65 Product requirements .75.1 General 75.1.1 Composition .75.1.2 Appearance and finish 85.2 Dimensions and tolerance 85.2.1 General 85.2.2 Thicknesses .85.2.3
12、Tolerances on nominal dimensions.85.3 Physical requirements and characteristics for fibre-cement slates .95.3.1 General 95.3.2 Apparent density95.3.3 Mechanical characteristics .95.3.4 Water impermeability 95.4 Durability requirements . 105.4.1 General . 105.4.2 Freeze-thaw . 105.4.3 Heat-rain 105.4
13、.4 Warm water 105.4.5 Soak-dry . 105.5 Fire and safety . 105.5.1 External fire performance 105.5.2 Reaction to fire 105.5.3 Release of dangerous substances 105.6 Product information 106 Evaluation of conformity 116.1 General . 116.2 Initial type testing . 116.3 Factory Production Control (FPC) 126.3
14、.1 General . 126.3.2 Acceptance tests 126.3.3 Equipment . 136.3.4 Raw materials and components 136.3.5 Product testing and evaluation . 136.3.6 Non-conforming products . 136.4 Inspection of a consignment of finished products . 147 Test methods . 147.1 General . 147.2 Dimensional tests . 147.2.1 Prep
15、aration of specimen 147.2.2 Apparatus 147.2.3 Procedure 147.2.4 Expression and interpretation of results . 147.3 Tests for physical performance and characteristics 14BS EN 492:2012EN 492:2012 (E) 3 7.3.1 Apparent density . 147.3.2 Mechanical characteristics: Breaking load test . 157.3.3 Water imperm
16、eability 187.3.4 Warm water 187.3.5 Soak-dry . 197.4 Tests for climatic performance 207.4.1 Freeze-thaw 207.4.2 Heat-rain . 227.5 Test for fire performance 237.5.1 Test for external fire performance . 237.5.2 Test for reaction to fire . 238 Marking, labelling and packaging 31Annex A (normative) Cons
17、ignment inspection sampling . 32Annex B (normative) Statistical method for determining the corresponding wet values or revised dry specifications for the bending moment when carrying out the dry method of test for quality control purposes . 33B.1 Procedure . 33B.2 Determination of the correlation be
18、tween the results of testing wet and dry specimens . 33B.3 Determination of the regression line . 34B.4 Determination of a value for wet testing from an obtained value for dry testing . 34B.5 Determination of the minimum value specified for dry testing xstdcorresponding to the minimum value specifie
19、d for wet testing in this standard ystd35Annex C (informative) Examples . 37C.1 Examples of dimension h . 37C.2 Examples of fibre-cement slates installed showing lines of fixing 39Annex D (normative) Requirements of Decision 2001/671/EC regarding the external fire performance of roof coverings expre
20、ssed following the classes defined in EN 13501-5 . 40Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directive . 41ZA.1 Scope and relevant characteristics . 41ZA.2 Procedure for the attestation of conformity of fibre cement slates an
21、d fittings 43ZA.2.1 Systems of attestation of conformity 43ZA.2.2 EC Declaration of conformity . 45ZA.3 CE marking . 47Bibliography 49BS EN 492:2012EN 492:2012 (E) 4 Foreword This document (EN 492:2012) has been prepared by Technical Committee CEN/TC 128 “Roof covering products for discontinuous lay
22、ing and products for wall cladding”, the secretariat of which is held by IBN. 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 April 2013 , and conflicting national standards shall be withdrawn at
23、the latest by April 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 492:2004. This document has been
24、 prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. In comparison with the previ
25、ous edition of the standard, the following sections have been changed or added: 2, 3.6, 3.7, 5.1.1, 5.3.3, 5.5.3, 6.3.2, 6.4, 7.3.4.4, 7.3.5.4, 7.5.1.2, 7.5.2.2, Annex A, Annex D. Annex ZB concerning the EC Directive 76/769/EEC has been deleted. A distinction has been made between product appraisal
26、(type tests) and routine quality control requirements (acceptance tests). The performance of a roof or another building part constructed with these products depends not only on the properties of the product as required by this standard, but also on the design, construction and installation of the co
27、mponents as a whole in relation to the environment and conditions of use. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Den
28、mark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 492:201
29、2EN 492:2012 (E) 5 1 Scope This European Standard specifies the technical requirements and establishes methods of control and test as well as acceptance conditions for fibre-cement slates and their fibre-cement fittings for one or more of the following uses: roofing; internal wall finishes; external
30、 wall and ceiling finishes. This European Standard applies to fibre-cement slates with a height dimension h (see Clause 4) not exceeding 850 mm for overlapping assembly. For the purpose of this European Standard, fibre-cement slates have been classified according to their bending moment. This Europe
31、an Standard covers fibre-cement slates reinforced with fibres of different types as specified in 5.1.1. This European Standard does not include calculations with regard to works, design requirements, installation techniques, wind uplift or rain proofing of the installed products. 2 Normative referen
32、ces The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN
33、197-1, Cement Part 1: Composition, specifications and conformity criteria for common cements CEN/TS 1187:2012, Test methods for external fire exposure to roofs EN 13501-1, Fire classification of construction products and building elements Part 1: Classification using test data from reaction to fire
34、tests EN 13501-5, Fire classification of construction products and building elements Part 5: Classification using data from external fire exposure to roofs tests EN 13823, Reaction to fire tests for building products Building products excluding floorings exposed to the thermal attack by a single bur
35、ning item EN ISO 1716, Reaction to fire tests for products Determination of the gross heat of combustion (calorific value) (ISO 1716) ISO 2602, Statistical interpretation of test results Estimation of the mean Confidence interval ISO 2859-1, Sampling procedures for inspection by attributes Part 1: S
36、ampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 3951-1, Sampling procedures for inspection by variables Part 1: Specification for single sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic and
37、a single AQL BS EN 492:2012EN 492:2012 (E) 6 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 acceptance test test to establish whether a batch of products conforms to a specification and which is performed on samples drawn either from continu
38、ous production or from a consignment Note 1 to entry: Test methods and specification limit values are specified in this standard. Sampling levels and acceptance criteria are given in 6.3.2. 3.2 type test test carried out to demonstrate conformity with the requirements of this standard or for the app
39、roval of a new product and/or when a fundamental change is made in formulation and/or method of manufacture, the effects of which cannot be predicted on the basis of previous experience Note 1 to entry: The test is performed on the product as delivered, but is not required for each production batch.
40、 3.3 acceptable quality level (AQL) quality level which in a sampling plan corresponds to a specified, relatively high probability of acceptance Note 1 to entry: It is the maximum percent defective (or maximum number of defects per 100 units) that for purposes of sampling inspection can be considere
41、d satisfactory as a process average. Note 2 to entry: A sampling scheme with an AQL of 4 % means that batches containing up to 4 % defective items have a high probability of acceptance. 3.4 as delivered same condition as the producer intends to supply the product after completing all aspects of the
42、process including maturing and, when appropriate, painting 3.5 upper face face normally exposed to the weather 3.6 under face reverse of upper face 3.7 NT fibre-cement slates and fittings of type NT cover products made using a non-asbestos technology 3.8 ambient laboratory conditions laboratory cond
43、itions which are a temperature of (23 5) C and a relative humidity of (50 20) % 4 Symbols and abbreviations b dimension of the specimen (length or width) measured parallel to the test machine supports in millimetres one of the coefficients of the regression line (Annex B) BS EN 492:2012EN 492:2012 (
44、E) 7 d apparent density of the fibre-cement slate in grams per cubic centimetree thickness of the fibre-cement slate in millimetres F load at rupture in newtons h dimension of the fibre-cement slate measured perpendicular to the line of fixing which is at or nearest to the horizontal plane of the ro
45、of (see Annex C, Figures C.1 and C.2), in millimetres lsspan between the centres of the test machine supports in the bending moment test in millimetres m mass of the specimen after drying in grams M bending moment at rupture in newton metres per metre Mfibending moment (average of both directions) a
46、t rupture of the specimen from the ithpair tested after the type test (second lot) in newton metres per metre Mfci bending moment (average of both directions) at rupture of the specimen from the ithpair tested for reference in the type test (first lot) in newton metres per metre R average ratio of t
47、he bending moments at rupture before and after the type test Riindividual ratio of the bending moments at rupture of the ithpair of specimens before and after a type test RLlower estimate of the mean of the ratios at 95 % confidence level of the bending moments at rupture before and after the type t
48、est s standard deviation of the values in the appropriate calculation V volume of the specimen in cubic centimetres xoactual result obtained when dry testing xstdminimum value to be used as the specification for the dry method of test. This value is calculated at the 97,5 % lower confidence level from the value ystd specified for the wet method of test in this document yovalue calculated from the value obtained from a specimen tested dry, which is the estimate at the 97,5 % lower confidence level of the value expected from a speci
