BS EN ISO 8501-3-2006 Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Preparation grades of welds edg.pdf

1、(renumbers BS ISO 8501-3:2006 as BS EN ISO 8501-3:2007)g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58and related products Visual assessment of sur

2、face cleanliness Part 3: Preparation grades of welds, edges and other areas with surface imperfectionsThe European Standard EN ISO 8501-3:2007 has the status of a British StandardICS 25.220.10Preparation of steel substrates before application of paints BRITISH STANDARDBS EN ISO 8501-3:2007 BS 7079-A

3、3: 2006Incorporating amendment no. 1 BS EN ISO 8501-3:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2006 BSI 2007ISBN 978 0 580 59926 2Amendments issued since publicationAmd. No. Date Comments17354 31 August 2007 Renumbers B

4、S ISO 8501-3:2006 as BS EN ISO 8501-3:2007This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard

5、 is the UK implementation of EN ISO 8501-3:2007. It is identical with ISO 8501-3:2006. It supersedes BS 7079-A3:2002 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/21, Surface preparation of steel. A list of organizations represented on this commi

6、ttee can be obtained on request to its secretary.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8501-3July 2007ICS 25.220.10English VersionPreparation of steel substrates before application of paints andrelated products - Visual assessment of surface cleanliness -Part 3: Preparation grades of

7、 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 - Partie 3: Degrs de prparationdes soudures, artes et autres zones prsentant desimperfecti

8、ons (ISO 8501-3:2006)Vorbereitung von Stahloberflchen vor dem Auftragen vonBeschichtungsstoffen - Visuelle Beurteilung derOberflchenreinheit - Teil 3: Vorbereitungsgrade vonSchweinhten, Kanten und anderen Flchen mitOberflchenunregelmigkeiten (ISO 8501-3:2006)This European Standard was approved by CE

9、N 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 alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may

10、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 translationunder the responsibility of a CEN member into its own language and notified to the CEN M

11、anagement 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, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No

12、rway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form a

13、nd 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 International Organization for Standardization (ISO) and has been taken over as EN ISO 8501-3

14、: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 identical text or by endorsement, at the latest by January 2008, and conflicting national stan

15、dards 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 Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, Fra

16、nce, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 8501-3:2006 has been approved by CEN as EN ISO 8501-3:20

17、07 without any modifications. EN ISO 8501-3:2007Reference numberISO 8501-3:2006(E)INTERNATIONAL STANDARD ISO8501-3Second edition2006-03-01Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part 3: Preparation grades of welds, ed

18、ges and other areas with surface imperfections Prparation des subjectiles dacier avant application de peintures et de produits assimils valuation visuelle de la propret dun subjectile Partie 3: Degrs de prparation des soudures, artes et autres zones prsentant des imperfections EN ISO 8501-3:2007ii i

19、iiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a

20、 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 the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matte

21、rs 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 International Standards. Draft International Standards adopted by the technical committees are circula

22、ted 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 of the elements of this document may be the subject of patent rights. ISO shall not be held responsibl

23、e for identifying any or all such patent rights. ISO 8501-3 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 12, Preparation of steel substrates before application of paints and related products. This second edition cancels and replaces the first edition (ISO 8501

24、-3:2001). The main changes are: revision of the description of preparation grade P1 in Clause 4 and the preparation grades for welding spatter and undercut in Table 1; replacement of the phrases “as found”, “as welded”, etc., with “no preparation”; deletion of Annex A “Correlation between preparatio

25、n grades and corrosivity categories”. ISO 8501 consists of the following parts, 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

26、and of steel substrates after overall removal of previous coatings Informative Supplement to Part 1: Representative photographic examples of the change of appearance imparted to steel when blast-cleaned with different abrasives Part 2: Preparation grades of previously coated steel substrates after l

27、ocalized 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 water jetting EN ISO 8501-3:2007iv Introduction The performance of

28、 protective coatings of paint and related products applied to steel is significantly affected by the state of the steel surface 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 co

29、ntaminants, including salts, dust, oils and greases; c) the surface profile. International Standards ISO 8501, ISO 8502 and ISO 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 sub

30、strates, indicating the capabilities of each in attaining specified levels of cleanliness. These International Standards do not contain recommendations for the protective coating system to be applied to the steel surface. Neither do they contain recommendations for the surface quality requirements f

31、or specific situations even though surface quality can have a direct influence on the choice of protective coating to be applied 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 e

32、nsure the qualities specified are: compatible and appropriate both for the environmental conditions to which the steel will be 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

33、with the following aspects of preparation of steel substrates: ISO 8501 Visual assessment of surface cleanliness; ISO 8502 Tests for the assessment of surface cleanliness; ISO 8503 Surface roughness characteristics of blast-cleaned steel substrates; ISO 8504 Surface preparation methods. Each of thes

34、e International Standards is in turn divided into separate parts. Imperfections at welds, edges and other areas of steel substrates 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 co

35、rrosion protection, this part of ISO 8501 defines certain imperfections and preparation grades for such areas. EN ISO 8501-3:20071Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part 3: Preparation grades of welds, edges and

36、other areas with surface imperfections 1 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

37、part of ISO 8501 are to make steel 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 reference

38、s, only the edition cited applies. 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, Pain

39、ts and varnishes Corrosion protection 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 Ta

40、ble 1. EN ISO 8501-3:20072 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 ap

41、plication of paint; P2 Thorough 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.

42、 Requirements for the preparation 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

43、heat-affected areas on a steel 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 prepa

44、ration while all other imperfections 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 rep

45、lica, known as NACE standard 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 8501-3:20073Table 1 Imperfections and preparation grades Type of imperfection Preparation gra

46、des Description Illustration 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 We

47、ld ripple/profile No preparation 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 s

48、lag 1.4 Undercut No preparation 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 dre

49、ssed out Surface shall 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 8501-3:20074 Table 1 (continued) Type of imperfection Preparation grades Description Illustration P1 P2 P3 2 Edges 2.1 Rolled edges No preparation 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 p