1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 28722:2011Vitreous and porcelain enamels Characteristics of enamel coatings applied to steel panels intended for architecture (ISO 28722:2008)BS EN ISO 28722:2011 BRITI
2、SH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 28722:2011. It is identical to ISO 28722:2008. It supersedes BS EN 14431:2004, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/36, Vitreous enamel coatings.A list
3、of organizations represented on this committee 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. BSI 2011 ISBN 978 0 580 72284 4 ICS 25.220.50 Compliance with a Briti
4、sh Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2011.Amendments issued since publicationDate Text affected EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 28722 March
5、 2011 ICS 25.220.50 Supersedes EN 14431:2004English Version Vitreous and porcelain enamels - Characteristics of enamel coatings applied to steel panels intended for architecture (ISO 28722:2008) maux vitrifis - Caractristiques des couches dmail appliques sur les panneaux dacier destins larchitecture
6、 (ISO 28722:2008) Emails und Emaillierungen - Merkmale von Emailschichten auf Architektur-Stahlpaneelen (ISO 28722:2008) This European Standard was approved by CEN on 3 March 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving thi
7、s 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 Standard exists in three official v
8、ersions (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 national standards bodies of Austr
9、ia, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROP
10、EAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 28722:2011: EBS EN ISO 28
11、722:2011 EN ISO 28722:2011 (E) 3 Foreword The text of ISO 28722:2008 has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 28722:2011 by Technical Committee CEN/TC 262
12、“Metallic and other inorganic coatings” the secretariat of which is held by BSI. 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 2011, and conflicting national standards shall be withdra
13、wn at the latest by September 2011. 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 14431:2004. According
14、to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, L
15、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 28722:2008 has been approved by CEN as a EN ISO 28722:2011 without any modification. BS EN ISO 28722:2011ISO
16、28722:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv 1 Scope 1 2 Normative references1 3 Terms and definitions .2 4 Requirements for heavy and light gauge steel enamelled panels .2 4.1 Steel 2 4.2 Application of coating.2 4.3 Final thickness of fired enamel2 5 Functional character
17、istics of enamel coating 3 5.1 Adherence test.3 5.2 Porosity test.3 5.3 Abrasion resistance 3 5.4 Impact resistance 4 5.5 Surface hardness (Mohs)4 5.6 Scratch resistance.4 5.7 Flatness 4 5.8 Acid resistance 4 6 Aesthetic characteristics of enamel coating 4 6.1 Surface appearance 4 6.2 Gloss.4 6.3 Co
18、lour .5 7 Resistance to graffiti .5 BS EN ISO 28722:2011ISO 28722:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norm
19、ally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in t
20、he work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare
21、 International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some
22、 of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 28722 was prepared by the European Committee for Standardization (CEN) (as EN 14431) and was adopted, under a special “fast-track procedure”, by
23、 Technical Committee ISO/TC 107, Metallic and other inorganic coatings, in parallel with its approval by the ISO member bodies. BS EN ISO 28722:2011INTERNATIONAL STANDARD ISO 28722:2008(E) ISO 2008 All rights reserved 1Vitreous and porcelain enamels Characteristics of enamel coatings applied to stee
24、l panels intended for architecture 1 Scope This International Standard specifies the requirements for enamel-coated, plane, cold-rolled, heavy- and light-gauge steel panels intended for interior and exterior architectural use. It includes the functional and aesthetic characteristics and resistance t
25、o graffiti of these panels and the related coatings. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (includin
26、g any amendments) applies. ISO 105-J03, Textiles Tests for colour fastness Part J03: Calculation of colour differences (including Technical Corrigendum 1:1996 and Technical Corrigendum 2:2006) ISO 2178, Non-magnetic coatings on magnetic substrates Measurement of coating thickness Magnetic method ISO
27、 2813, Paints and varnishes Determination of specular gloss of non-metallic paint films at 20, 60 and 85 (including Technical Corrigendum 1:1997) ISO 4532, Vitreous and porcelain enamels Determination of the resistance of enamelled articles to impact Pistol test ISO 8289:2000, Vitreous and porcelain
28、 enamels Low voltage test for detecting and locating defects ISO 15695, Vitreous and porcelain enamels Determination of scratch resistance of enamel finishes (including Technical Corrigendum 1:2000) ISO 28706-1:2008, Vitreous and porcelain enamels Determination of resistance to chemical corrosion Pa
29、rt 1: Determination of resistance to chemical corrosion by acids at room temperature ISO 28706-2:2008, Vitreous and porcelain enamels Determination of resistance to chemical corrosion Part 2: Determination of resistance to chemical corrosion by boiling acids, boiling neutral liquids and/or their vap
30、ours EN 101, Ceramic tiles Determination of scratch hardness of surface according to Mohs EN 10209:1996, Cold rolled low carbon steel flat products for vitreous enamelling Technical delivery conditions EN 14430, Vitreous and porcelain enamels High voltage test BS EN ISO 28722:2011ISO 28722:2008(E) 2
31、 ISO 2008 All rights reservedASTM C 501, Standard Test Method for Relative Resistance to Wear of Unglazed Ceramic Tile by the Taber Abraser 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 vitreous enamel porcelain enamel substantially vitreou
32、s, or glassy, inorganic coating bonded to metal by fusion at a temperature above 500 C NOTE 1 This coating can be applied for protective, functional and/or decorative purposes. NOTE 2 It is produced by the application of powdered inorganic glass, dry or suspended in water, on to the metal surface, a
33、nd its subsequent fusion bonding. The fused coating exhibits a cubic thermal expansion of between 150 107/K and 450 107/K in the temperature range 20 C to 100 C, the actual value varying specifically with the type of substrate and field of application. 3.2 enamelled heavy-gauge steel panel cold-roll
34、ed steel panel that is first formed and then enamelled, either individually or in batches NOTE Commonly, the thickness of steel substrate for enamelled heavy-gauge steel panels is greater than 0,75 mm. 3.3 enamelled light-gauge steel panel panel made by cutting the porcelain- or vitreous-enamelled t
35、op skin material produced in the enamelled condition on a continuous coil coating line, and laminating it on to a suitable core material or sandwich which provides its shape and strength NOTE Commonly the thickness of the steel for the top skin for enamelled light-gauge steel panels is 0,30 mm to 0,
36、75 mm. 4 Requirements for enamelled heavy- and light-gauge steel panels 4.1 Steel The steel to be enamelled shall conform to the requirements of EN 10209, unless otherwise agreed by the interested parties. The steel thickness shall be more than 0,75 mm for enamelled heavy-gauge steel panels and from
37、 0,30 mm to 0,75 mm for enamelled light-gauge steel panels. 4.2 Application of coating A minimum of two layers of enamel shall be applied over the external panel surface and a minimum of one layer on the internal panel surface. 4.3 Final thickness of fired enamel When determined using the method giv
38、en in ISO 2178, the final enamel thickness on the faces of the panel shall be as given in Table 1. BS EN ISO 28722:2011ISO 28722:2008(E) ISO 2008 All rights reserved 3Table 1 Final thickness of fired enamel Final enamel thickness m Type of panel External face Internal face Heavy gauge 180 to 500 W 1
39、00 Light gauge 75 to 275 W 60 The maximum thicknesses may be exceeded to achieve a particular aesthetic appearance, subject to agreement between the interested parties. 5 Functional characteristics of enamel coating 5.1 Adherence test When determined in accordance with the procedure given in EN 1020
40、9:1996, Annex D, the adherence of the enamel to the metallic substrate shall be at least Class 3. The test shall be carried out on pieces fired in parallel to the production panels. Because the adherence is influenced by refiring processes, the test shall be performed after the final firing. 5.2 Por
41、osity test The enamel coat shall not contain defects which could give rise to localized corrosion. When tested in accordance with EN 14430, or method A or B of ISO 8289:2000, the number of open pores detected shall have the limits given in Table 2. NOTE No open-pore limit is specified for dry interi
42、or applications. Table 2 Limits for open pores Method Pores m2EN 14430 max. 10 ISO 8289:2000, method A max. 5 ISO 8289:2000, method B max. 10 When used for exterior building parts, the back and edges of the panel shall be adequately protected from corrosion. In the case of heavy-gauge panels, partic
43、ular attention shall be given to the protection or concealment of edges within the design and the enamel application. For light-gauge panels, particular attention shall be given to the protection or concealment of cut edges during panel assembly or installation. 5.3 Abrasion resistance When determin
44、ed using the Taber apparatus in accordance with ASTM C 501, using S 33 emery paper and a 1 kg weight, the resistance to abrasion, given as the loss in mass after 1 000 revolutions, shall be a maximum of 0,1 g. This test shall not serve as guidance for assessing loss in gloss. BS EN ISO 28722:2011ISO
45、 28722:2008(E) 4 ISO 2008 All rights reserved5.4 Impact resistance Determine the resistance to impact using the method given in ISO 4532. When activating the pistol with a force of 20 N, there shall be no damage over 2 mm in diameter after 24 h. NOTE The mark of the striking bolt is not regarded as
46、damage (see ISO 4532). 5.5 Surface hardness (Mohs) When determined using the method given in EN 101, the Mohs surface hardness shall be a minimum of 5. 5.6 Scratch resistance When determined using the method given in ISO 15695, the scratch resistance shall be a minimum of 7 N. NOTE The minimum limit
47、 for metallic finishes and silk-screened finishes is 4 N. 5.7 Flatness Finished flat heavy-gauge panel faces with core material shall have a maximum deflection of 0,5 % in the convex direction when measured perpendicular to the nominal plane of the panel face. Deflection in the concave direction sha
48、ll be limited to less than 0,25 % from the actual plane of the panel face. These percentages refer to the values of the largest diagonal or to the diameter of the panel. Panels shall be measured in the position in which they will be installed. For finished flat light-gauge panel faces with core mate
49、rial, these deflections shall be restricted to a maximum of 0,15 % in both directions. 5.8 Acid resistance When tested in accordance with Clause 9 of ISO 28706-1:2008, enamel coatings for exterior and interior environments shall have a minimum of class A acid resistance. When tested in accordance with Clause 10 of ISO 28706-2:2008, enamel coatings for exterior environments shall have a maximum mass loss of 18,5 g/m2. 6 Aesthetic characteristics of enamel coating 6.1 Surface appearance Al
