1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 927-1:2013Paints and varnishes Coatingmaterials and coating systemsfor exterior woodPart 1: Classification and selectionBS EN 927-1:2013 BRITISH STANDARDNational forewordTh
2、is British Standard is the UK implementation of EN 927-1:2013. Itsupersedes BS EN 927-1:1997 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee STI/28, Paint systems for non-metallic substrates.A list of organizations represented on this committee can beob
3、tained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 75760 0ICS 87.040Compliance with a
4、 British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2013.Amendments issued since publicationDate Text affectedBS EN 927-1:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
5、EN 927-1 February 2013 ICS 87.040; 71.100.50 Supersedes EN 927-1:1996English Version Paints and varnishes - Coating materials and coating systems for exterior wood - Part 1: Classification and selection Peintures et vernis - Produits de peinture et systmes de peinture pour le bois extrieur - Partie
6、1: Classification et slection Beschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme fr Holz im Auenbereich - Teil 1: Einteilung und Auswahl This European Standard was approved by CEN on 5 January 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipu
7、late 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 CEN-CENELEC Management Centre or to any CEN member. This European S
8、tandard 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the
9、national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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,
10、 Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reser
11、ved worldwide for CEN national Members. Ref. No. EN 927-1:2013: EBS EN 927-1:2013EN 927-1:2013 (E) 2 Contents Page Foreword . 3 Introduction 4 1 Scope 5 2 Normative references . 5 3 Terms and definitions 5 4 Classification 9 4.1 General . 9 4.2 Classification by intended end use . 9 4.3 Classificati
12、on by appearance 9 4.4 Classification by exposure conditions 10 5 Manufacturers product information 11 Annex A (informative) Guidance on selection criteria . 12 A.1 General . 12 A.2 End use . 12 A.3 Appearance 12 A.4 Exposure conditions 13 A.5 Substrate condition 15 Annex B (informative) Example for
13、 a manufacturers product information 16 Annex C (informative) Example for a completed manufacturers product information 17 Bibliography 18 BS EN 927-1:2013EN 927-1:2013 (E) 3 Foreword This document (EN 927-1:2013) has been prepared by Technical Committee CEN/TC 139 “Paints and varnishes”, the secret
14、ariat 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 August 2013, and conflicting national standards shall be withdrawn at the latest by August 2013. Attention is drawn t
15、o 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 927-1:1996. EN 927 consists of the following parts under the general title “Pa
16、ints and varnishes Coating materials and coating systems for exterior wood“: Part 1: Classification and selection (the present document); Part 2: Performance specification; Part 3: Natural weathering test; Part 5: Assessment of the liquid water permeability; Part 6: Exposure of wood coatings to arti
17、ficial weathering using fluorescent UV lamps and water. The main technical changes are: a) the definition “build“ was split up into “measured build“, “theoretical build“ and “subjective build“; b) the classification of build was extended to “very high“; c) the classification by exposure conditions w
18、as revised; d) the exposure conditions in Annex A were revised; e) the example for a manufacturers product information was revised. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austri
19、a, Belgium, Bulgaria, Croatia, 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,
20、 Switzerland, Turkey and the United Kingdom. BS EN 927-1:2013EN 927-1:2013 (E) 4 Introduction The names used today to describe coating materials and coating systems pay little regard to technical, functional and end use categories. This makes it difficult to devise an unequivocal simple terminology
21、applicable to all product types. This part of EN 927 attempts to address this problem by separately defining categories of appearance and end use, but with no assumptions as to whether or not a given product, by its appearance alone, will be suitable for a particular use. The objective is to avoid m
22、isuse of coating systems by the misunderstanding or over-statement of performance claims. Current experience of characteristic coating behaviour is explained in Annex A so that users can be forewarned of situations requiring specific assurances. The treatment of exterior wood surfaces has aesthetic
23、and protective functions. The result of such treatments can include the following: protection against aesthetic deterioration; protection against deterioration due to weathering influences; moderation of dimensional change; protection against blue stain attack; maintaining the function of wood compo
24、nents (including the possibility of renovation). This part of EN 927 identifies criteria that need to be considered when assessing the suitability of a coating system for a particular end use and provides a framework for communicating this information between manufacturer and user. This should assis
25、t in the removal of technical barriers to trade. It is the responsibility of the manufacturer of a coating system to designate the appropriate categories for end use and appearance. BS EN 927-1:2013EN 927-1:2013 (E) 5 1 Scope This European Standard specifies a system for the classification of coatin
26、g systems and coating materials for exterior wood surfaces by categories of end use, appearance and exposure conditions. It also defines several components of a multi coat system (primer, undercoat, top coat, etc.). It is applicable to all coating materials and coating systems intended for decoratio
27、n and protection of exterior wood surfaces including those which contain biologically protective ingredients for the protection of coatings and at their surface (film preservation). The coating materials may include biologically active ingredients for the protection of the liquid coating material, f
28、or example during storage (in-can preservation) or to protect their interface with the wood (e.g. blue stain protection). This European Standard is generally not applicable to wood preservatives. Wood preservatives may however be part of a coating system covered by this standard. Guidance on selecti
29、on criteria and the procedures for users selection are given for information in Annex A. 2 Normative references 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. F
30、or undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 2808:2007, Paints and varnishes Determination of film thickness (ISO 2808:2007) EN ISO 2813, Paints and varnishes Determination of specular gloss of non-metallic paint films at 20, 60 and
31、85 (ISO 2813, including Technical Corrigendum 1) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 ageing irreversible changes in the properties of a film which occur with the passage of time SOURCE: EN ISO 4618:2006, 2.9 3.2 blocking unwanted
32、adhesion between two surfaces, at least one of which has been coated, when they are left in contact under load after a given drying period SOURCE: EN ISO 4618:2006, 2.29 3.3 blue stain in service surface staining of timber in service by fungi causing blue to black discoloration, often leading to dis
33、ruption of surface finishes BS EN 927-1:2013EN 927-1:2013 (E) 6 3.4 build NOTE In this standard, the term “build“ is used when classification refers to the measured dry film thickness of either the whole coating system, or an individual product as appropriate. The dry film thickness is stated in mic
34、rometres and refers to the layer on (above) the wood surface. Systems might penetrate the wood material to some extent, but this part is not included in the determination. 3.4.1 measured build dry film thickness of the coating system measured on planed bare wood according to method 6A of EN ISO 2808
35、:2007 3.4.2 theoretical build dry film thickness calculated from the spreading rate and the volume of non-volatile matter Note 1 to entry: The theoretical build, in micrometres, is given by the formula: 100NVVd=Vt where tddry film thickness, in micrometres; V is the spreading rate, in millilitres pe
36、r square metre; NVVis the non-volatile matter content, expressed as a percentage by volume. Note 2 to entry: The theoretical build gives an indication of the dry film thickness on a non-absorbent substrate and can be calculated from data optionally supplied by the manufacturer. 3.4.3 subjective buil
37、d visual impression of the thickness of a dried film or coating system Note 1 to entry: The subjective build is governed by several factors including film thickness, gloss and film levelling. 3.5 coating material product, in liquid or in paste or powder form, that, when applied to a substrate, forms
38、 a film possessing protective, decorative and/or other specific properties SOURCE: EN ISO 4618:2006, 2.50, modified Note deleted 3.5.1 paint pigmented coating material which, when applied to a substrate, forms an opaque film having protective, decorative or specific technical properties Note 1 to en
39、try: In some countries the term “opaque wood stain“ is also used for an opaque coating applied such that the wood surface structure remains visible. SOURCE: EN ISO 4618:2006, 2.167 BS EN 927-1:2013EN 927-1:2013 (E) 7 3.5.2 clear coating material coating material which when applied to a substrate for
40、ms a solid transparent film having protective, decorative or specific technical properties Note 1 to entry: In some countries the term “varnish” is used to designate any transparent coating. Varnishes are clear coating materials which dry exclusively by oxidation. SOURCE: EN ISO 4618:2006, 2.46, mod
41、ified Note replaced 3.5.3 lasure coating material containing small amounts of a suitable pigment used to form a transparent or semi transparent film for decoration and/or protection of the substrate Note 1 to entry: In this standard, the term “lasure“ is similar to “exterior wood stain“. Note 2 to e
42、ntry: In some countries the term “wood stain” or “exterior wood stain” also is used to designate any transparent or semi transparent coating material. Some kinds of (interior) wood stains are not in the scope of EN 927-1 (see EN ISO 4618:2006, 2.251). 3.6 coating system combination of all coats of c
43、oating materials which are to be applied or which have been applied to a substrate Note 1 to entry: The actual system can be characterised by the number of coats involved. SOURCE: EN ISO 4618:2006, 2.53 3.6.1 primer paint that has been formulated for use as a priming coat on prepared surfaces SOURCE
44、: EN ISO 4618:2006, 2188, modified Note 1 added Note 1 to entry: In this standard, primers could also consist of unpigmented coating materials. 3.6.2 priming coat first coat of a coating system SOURCE: EN ISO 4618:2006, 2.189 3.6.3 intermediate coat any coat between the priming coat and the finishin
45、g coat SOURCE: EN ISO 4618:2006, 2.141 3.6.4 finishing coat top coat final coat of a coating system SOURCE: EN ISO 4618:2006, 2.108 BS EN 927-1:2013EN 927-1:2013 (E) 8 3.7 flexibility ability of a dry film to follow without damage the deformations of the substrate to which it is applied Note 1 to en
46、try: The use of the term “elasticity“ to describe the flexibility of a film is incorrect. SOURCE: EN ISO 4618:2006, 2.116 3.8 gloss optical property of a surface, characterised by its ability to reflect light specularly Note 1 to entry: Examples of degrees of gloss are high gloss, gloss, silkgloss,
47、semigloss, satin, matt and dead matt. SOURCE: EN ISO 4618:2006, 2.128 3.9 hiding power coverage opacity ability of a coating material or a coating to obliterate the colour or the differences in colour of a substrate SOURCE: EN ISO 4618:2006, 2.135 3.10 impregnating material coating material with low
48、 viscosity for the treatment of absorptive substrates to reduce their absorptivity and/or to harden them Note 1 to entry: An impregnating material may contain a biocide for wood protection. SOURCE: EN ISO 4618:2006, 2.139, modified Note replaced 3.11 rot decomposition of timber by fungi resulting in
49、 softening, progressive loss of strength and mass and often a change of texture and colour 3.12 water absorption ability of a coated or uncoated wood panel to absorb water from liquid or vapour SOURCE: EN 927-5:2006, 3.1 3.13 water permeability ability of a coating system to allow the transmission of water as liquid or vapour 3.14 wood preservative product, containing a biocide, which is intended to inhibit the development of wood-destroying and/or wood-staining organisms in the wood to which it is appl
