1、October 2007DEUTSCHE NORM English price group 8No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25.220.10!$J)b“1390663w
2、ww.din.deDDIN EN ISO 8501-3Preparation of steel substrates before application of paints and relatedproducts Visual assessment of surface cleanliness Part 3: Preparation grades of welds, edges and other areas with surfaceimperfections (ISO 8501-3:2006)English version of DIN EN ISO 8501-3:2007-10Vorbe
3、reitung von Stahloberflchen vor dem Auftragen von Beschichtungsstoffen Visuelle Beurteilung der Oberflchenreinheit Teil 3: Vorbereitungsgrade von Schweinhten, Kanten und anderen Flchen mitOberflchenunregelmigkeiten (ISO 8501-3:2006)Englische Fassung DIN EN ISO 8501-3:2007-10www.beuth.deDocument comp
4、rises 11 pagesDIN EN ISO 8501-3:2007-10 2 National foreword This standard falls within the responsibility of Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). It is identical with International Standard ISO 8501-3 which was prepared by Technical Committee ISO/TC 35 “
5、Paints and varnishes”, Subcommittee SC 12 “Preparation of steel substrates before application of paints and related products” (Secretariat: BSI, United Kingdom). The responsible German bodies involved in its preparation were the Normenausschuss Beschichtungsstoffe und Beschichtungen (Coatings and Co
6、ating Materials Standards Committee) and the Normenausschuss Bau-wesen (Building and Civil Engineering Standards Committee), Technical Committees NA 002-00-10-04 GUA Oberflchenvorbereitung und -prfung and NA 002-00-10 GA Korrosionsschutz von Stahlbauten. DIN EN ISO 8501 consists of the following par
7、ts, under the general title Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness: Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings Part 2: P
8、reparation grades of previously coated steel substrates after localized removal of previous coatings Part 3: Preparation grades of welds, edges and other areas with surface imperfections Part 4: Initial surface conditions, preparation grades and flash rust grades in connection with high-pressure wat
9、er jetting The DIN Standards corresponding to the International Standards referred to in clause 2 and in the Bibliography of the EN are as follows: ISO 8504-3 DIN EN ISO 8504-3 ISO 12944-2 DIN EN ISO 12944-2 ISO 12944-3 DIN EN ISO 12944-3 National Annex NA (informative) Bibliography DIN EN ISO 8504-
10、3, Preparation of steel substrates before application of paints and related products Surface preparation methods Part 3: Hand- and power-tool cleaning DIN EN ISO 12944-2, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 2: Classification of environments
11、DIN EN ISO 12944-3, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 3: Design considerations EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8501-3July 2007ICS 25.220.10English VersionPreparation of steel substrates before application of paints an
12、drelated products - Visual assessment of surface cleanliness -Part 3: Preparation grades of welds, edges and other areas withsurface imperfections (ISO 8501-3:2006)Prparation des subjectiles dacier avant application depeintures et de produits assimils - valuation visuelle dela propret dun subjectile
13、 - Partie 3: Degrs de prparationdes soudures, artes et autres zones prsentant desimperfections (ISO 8501-3:2006)Vorbereitung von Stahloberflchen vor dem Auftragen vonBeschichtungsstoffen - Visuelle Beurteilung derOberflchenreinheit - Teil 3: Vorbereitungsgrade vonSchweinhten, Kanten und anderen Flch
14、en mitOberflchenunregelmigkeiten (ISO 8501-3:2006)This European Standard was approved by CEN on 11 July 2007.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 alterat
15、ion. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translat
16、ionunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Gree
17、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Ce
18、ntre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 8501-3:2007: EForeword The text of ISO 8501-3:2006 has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” of the In
19、ternational Organization for Standardization (ISO) and has been taken over as EN ISO 8501-3:2007 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 ide
20、ntical text or by endorsement, at the latest by January 2008, and conflicting national standards shall be withdrawn at the latest by January 2008. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European S
21、tandard: Austria, Belgium, Bulgaria, 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.
22、Endorsement notice The text of ISO 8501-3:2006 has been approved by CEN as EN ISO 8501-3:2007 without any modifications. EN ISO 8501-3:2007 (E)2Introduction The performance of protective coatings of paint and related products applied to steel is significantly affected by the state of the steel surfa
23、ce immediately prior to painting. The principal factors that are known to influence this performance are: a) the presence of rust and mill scale; b) the presence of surface contaminants, including salts, dust, oils and greases; c) the surface profile. International Standards ISO 8501, ISO 8502 and I
24、SO 8503 have been prepared to provide methods of assessing these factors, while ISO 8504 provides guidance on the preparation methods that are available for cleaning steel substrates, indicating the capabilities of each in attaining specified levels of cleanliness. These International Standards do n
25、ot contain recommendations for the protective coating system to be applied to the steel surface. Neither do they contain recommendations for the surface quality requirements for specific situations even though surface quality can have a direct influence on the choice of protective coating to be appl
26、ied and on its performance. Such recommendations are given in other documents such as national standards and codes of practice. Users of these International Standards should ensure the qualities specified are: compatible and appropriate both for the environmental conditions to which the steel will b
27、e exposed and for the protective coating system to be used; within the capability of the cleaning procedure specified. The four International Standards referred to above deal with the following aspects of preparation of steel substrates: ISO 8501 Visual assessment of surface cleanliness; ISO 8502 Te
28、sts for the assessment of surface cleanliness; ISO 8503 Surface roughness characteristics of blast-cleaned steel substrates; ISO 8504 Surface preparation methods. Each of these International Standards is in turn divided into separate parts. Imperfections at welds, edges and other areas of steel subs
29、trates are generally starting points for corrosion. Such areas are also difficult to protect by application of paints and related products. To assist in achieving efficient corrosion protection, this part of ISO 8501 defines certain imperfections and preparation grades for such areas. EN ISO 8501-3:
30、2007 (E)31 Scope This part of ISO 8501 describes preparation grades of welds, edges and other areas, on steel surfaces with imperfections. Such imperfections can become visible before and/or after an abrasive blast-cleaning process. The preparation grades given in this part of ISO 8501 are to make s
31、teel surfaces with imperfections, including welded and fabricated surfaces, suitable for the application of paints and related products. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited appl
32、ies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 12944-2, Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 2: Classification of environments ISO 12944-3, Paints and varnishes Corrosion pro
33、tection of steel structures by protective paint systems Part 3: Design considerations 3 Types of imperfection This part of ISO 8501 deals with imperfections on: welds; edges; steel surfaces generally. The various types of imperfection are illustrated and described in Table 1. EN ISO 8501-3:2007 (E)4
34、4 Preparation grades Three preparation grades for making steel surfaces with visible imperfections suitable for the application of paints and related products are as follows: P1 Light preparation: no preparation or only minimum preparation needs to be carried out before application of paint; P2 Thor
35、ough preparation: most imperfections are remedied; P3 Very thorough preparation: surface is free of significant visible imperfections. The significance of visible imperfections should preferably be agreed between all relevant parties, depending on the specific application. Requirements for the prepa
36、ration grades are given in Table 1. NOTE 1 It is important that the preparation methods used to achieve these preparation grades are not deleterious to the integrity of the steel surface or welded areas. For example, strong grinding pressure can result in the formation of heat-affected areas on a st
37、eel surface, and removal of defects by grinding can leave sharp edges at the edges of the grind pattern. NOTE 2 It is possible that different imperfections on a structure will require different preparation grades. For example, undercut (Table 1, 1.4) might require P3 preparation while all other impe
38、rfections might require P2 preparation. This can, in particular, be the case when there are requirements for the aesthetic appearance of the finish. In such cases, P3 could be specified even if there were no apparent corrosivity requirements (see ISO 12944-2). NOTE 3 A replica, known as NACE standar
39、d RP 0178, showing examples of weld imperfections and certain levels of preparation, can be obtained from NACE International, PO Box 218340, Houston, Texas 77218-8340, USA. EN ISO 8501-3:2007 (E)5Table 1 Imperfections and preparation grades Type of imperfection Preparation grades Description Illustr
40、ation P1 P2 P3 1 Welds 1.1 Welding spatter Surface shall be free of all loose welding spatter see a) Surface shall be free of all loose and lightly adhering welding spatter see a) and b) Welding spatter shown in c) may remain Surface shall be free of all welding spatter 1.2 Weld ripple/profile No pr
41、eparation Surface shall be dressed (e.g. by grinding) to remove irregular and sharp- edged profiles Surface shall be fully dressed, i.e. smooth 1.3 Welding slag Surface shall be free from welding slag Surface shall be free from welding slag Surface shall be free from welding slag 1.4 Undercut No pre
42、paration Surface shall be free from sharp or deep undercuts Surface shall be free from undercuts 1.5 Weld porosity Key 1 visible 2 invisible (might open after abrasive blast cleaning) No preparation Surface pores shall be sufficiently open to allow penetration of paint, or dressed out Surface shall
43、be free from visible pores 1.6 End craters No preparation End craters shall be free from sharp edges Surface shall be free from visible end craters EN ISO 8501-3:2007 (E)6Table 1 (continued) Type of imperfection Preparation grades Description Illustration P1 P2 P3 2 Edges 2.1 Rolled edges No prepara
44、tion No preparation Edges shall be rounded with a radius of not less than 2 mm (see ISO 12944-3) 2.2 Edges made by punching, shearing, sawing or drilling Key 1 punching 2 shearing No part of the edge shall be sharp; the edge shall be free from fins No part of the edge shall be sharp; the edge shall
45、be free from fins Edges shall be rounded with a radius of not less than 2 mm (see ISO 12944-3) 2.3 Thermally cut edges Surface shall be free of slag and loose scale No part of the edge shall have an irregular profile Cut face shall be removed and edges shall be rounded with a radius of not less than
46、 2 mm (see ISO 12944-3) 3 Surfaces generally 3.1 Pits and craters Pits and craters shall be sufficiently open to allow penetration of paint Pits and craters shall be sufficiently open to allow penetration of paint Surface shall be free of pits and craters 3.2 Shelling NOTE In English-language usage,
47、 the terms “slivers” and “hackles” are also used to describe this type of imperfection. Surface shall be free from lifted material Surface shall be free from visible shelling Surface shall be free from visible shelling 3.3 Roll overs/roll laminations/cut laminations Surface shall be free from lifted
48、 material Surface shall be free from visible roll-overs/ laminations Surface shall be free from visible roll-overs/ laminations EN ISO 8501-3:2007 (E)7Table 1 (continued) Type of imperfection Preparation grades Description Illustration P1 P2 P3 3.4 Rolled-in extraneous matter Surface shall be free f
49、rom rolled-in extraneous matterSurface shall be free from rolled-in extraneous matter Surface shall be free from rolled-in extraneous matter 3.5 Grooves and gouges formed by mechanical action No preparation The radius of grooves and gouges shall be not less than 2 mm Surface shall be free from grooves, and the radius of gouges shall be greater than 4 mm 3.6 Indentations and roll marks No preparation Indentations and roll marks shall be smooth Surface shall be free from indentations and roll marks EN ISO
