BS-EN-ISO-11124-3-1997 BS-7079-E3-1994.pdf

BRITISH STANDARD CONFIRMED DECEMBER 1998 BS EN ISO 11124-3:1997 BS 7079-E3: 1994 Incorporating Amendment No. 1 to BS 7079-E3:1994 (renumbers BS as BS EN ISO 11124-3:1997) Preparation of steel substrates before application of paints and related products Specifications for metallic blast-cleaning abrasives Part 3: High-carbon cast-steel shot and grit The European Standard EN ISO 11124-3:1997 has the status of a British Standard ICS 25.220.10; 87.020 BS EN ISO 11124-3:1997 This British Standard, having been prepared under the direction of the Surface Treatments and Coatings Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 March 1994 © BSI 04-2000 The following BSI references relate to the work on this standard: Committee reference STC/21 Draft for comment 92/50232 DC ISBN 0 580 22897 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Surface Treatments and Coatings Standards Policy Committee (STC/-) to Technical Committee STC/21, upon which the following bodies were represented: Association of Consulting Engineers British Chemical Engineering Contractors Association British Coatings Federation Ltd. British Constructional Steelwork Association Ltd. British Grit Association British Railways Board British Steel Industry Department of Transport Electricity Association Institute of Corrosion National Federation of Painting and Decorating Contractors Oil and Colour Chemists Association Paint Research Association Royal Society of Chemistry Amendments issued since publication Amd. No.DateComments 9722November 1997 Indicated by a sideline in the margin BS EN ISO 11124-3:1997 © BSI 04-2000i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Definitions3 4Designation of abrasives4 5Sampling4 6Requirements for high-carbon cast-steel shot and grit abrasives4 7Package identification and lot traceability4 8Information to be provided by the manufacturer or supplier4 Annex A (informative) Approximately equivalent codings for shot and grit abrasives8 Annex B (informative) Bibliography8 Annex ZA (normative) Normative references to international publications with their relevant European publicationsInside back cover Table 1 Screening specifications by grade High-carbon cast-steel shot Cumulative % retained5 Table 2 Screening specifications by grade High-carbon cast-steel grit Cumulative % retained5 Table 3 Untitled6 Table A.1 Untitled8 BS EN ISO 11124-3:1997 ii © BSI 04-2000 National foreword This British Standard has been prepared by Technical Committee STC/21 and is the English language version of EN ISO 11124-3:1997 Preparation of steel substrates before application of paints and related products Specifications for metallic blast-cleaning abrasives Part 3: High-carbon cast-steel shot and grit, published by the European Committee for Standardization (CEN). It is identical with ISO 11124-3:1993, published by the International Organization for Standardization (ISO). International Standard ISO 11124-3 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. The other parts of BS EN ISO 11124 are: Part 1: General introduction and classification; Part 2: Chilled-iron grit; Part 4: Low-carbon cast-steel shot. Together with Part 4, this Part of BS EN ISO 11124 supersedes BS 2451:1963, which is withdrawn. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. Attention is drawn to Annex ZA, which gives the European Standards that correspond to the International Standards referred to. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO 11124-3 June 1997 ICS 87.020 Descriptors: Paints, varnishes, substrates, steel products, blast-cleaning, abrasives, metallic abrasives, specifications, designation English version Preparation of steel substrates before application of paints and related products Specifications for metallic blast-cleaning abrasives Part 3: High-carbon cast-steel shot and grit (ISO 11124-2:1993) Préparation des subjectiles dacier avant application de peintures et de produits assimilés Spécifications pour abrasifs métalliques destinés à la préparation par projection Partie 3: Grenaille ronde et angulaire en acier moulé à haut carbone (ISO 11124-3:1993) Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen Anforderungen an metallische Strahlmittel Teil 3: Stahluß mit hohem Kohlenstoffgehalt, kugelig und kantig (shot und Grit) (ISO 11124-3:1993) This European Standard was approved by CEN on 1997-05-28. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate 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 Central Secretariat or to any CEN member. This European Standard 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11124-3:1997 E EN ISO 11124-3:1997 © BSI 04-2000 2 Foreword The text of the International Standard from Technical Committee ISO/TC 35, Paints and varnishes, of the International Organization for Standardization (ISO) has been taken over as a European Standard 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 December 1997, and conflicting national standards shall be withdrawn at the latest by December 1997. According to CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. NOTENormative references to International Standards are listed in Annex ZA (normative). EN ISO 11124-3:1997 © BSI 04-20003 WARNING Equipment, materials and abrasives used for surface preparation can be hazardous if used carelessly. Many national regulations exist for those materials and abrasives that are considered to be hazardous during or after use (waste management), such as free silica or carcinogenic or toxic substances. These regulations are therefore to be observed. It is important to ensure that adequate instructions are given and that all required precautions are exercised. 1 Scope This part of ISO 11124 specifies requirements for 14 grades of high-carbon cast-steel shot and 12 grades of high-carbon cast-steel grit, as supplied for blast-cleaning processes. Values are specified for hardness, density, defect/structural requirements and chemical composition. The requirements specified in this part of ISO 11124 apply to abrasives supplied in the “new” condition only. They do not apply to abrasives either during or after use. Test methods for metallic blast-cleaning abrasives are given in the various parts of ISO 11125. High-carbon cast-steel shot and grit are used in both static and site blasting equipment. They are most often selected where a facility exists for the recovery and re-use of the abrasive. NOTE 1Information on commonly referenced national standards for metallic abrasives and their approximate relationship with ISO 11124 is given in Annex A and Annex B. NOTE 2Although this part of ISO 11124 has been developed specifically to meet requirements for preparation of steelwork, the properties specified will generally be appropriate for use when preparing other material surfaces, or components, using blast-cleaning techniques. These techniques are described in ISO 8504-2:1992, Preparation of steel substrates before application of paints and related products Surface preparation methods Part 2: Abrasive blast-cleaning. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 11124. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 11124 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 439:1982, Steel and cast iron Determination of total silicon Gravimetric method. ISO 629:1982, Steel and cast iron Determination of manganese content Spectrophotometric method. ISO 4935:1989, Steel and iron Determination of sulfur content Infrared absorption method after combustion in an induction furnace. ISO 9556:1989, Steel and iron Determination of total carbon content Infrared absorption method after combustion in an induction furnace. ISO 10714:1992, Steel and iron Determination of phosphorus content Phosphovanadomolybdate spectrophotometric method. ISO 11125-1:1993, Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives Part 1: Sampling. ISO 11125-2:1993, Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives Part 2: Determination of particle size distribution. ISO 11125-3:1993, Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives Part 3: Determination of hardness. ISO 11125-4:1993, Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives Part 4: Determination of apparent density. ISO 11125-5:1993, Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives Part 5: Determination of percentage defective particles and of microstructure. ISO 11125-6:1993, Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives Part 6: Determination of foreign matter. ISO 11125-7:1993, Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives Part 7: Determination of moisture. 3 Definitions For the purposes of this part of ISO 11124, the following definitions apply. 3.1 high-carbon cast-steel shot a metallic blast-cleaning abrasive produced by a casting process in which molten high-carbon steel is formed into shot (see also 3.3) by means of an atomization process 3.2 high-carbon cast-steel grit a metallic blast-cleaning abrasive obtained by crushing various high-carbon cast-steel shot sizes into sharp-edged angular particles EN ISO 11124-3:1997 4 © BSI 04-2000 3.3 shot particles that are predominantly round, that have a length of less than twice the maximum particle width and that do not have edges, broken faces or other sharp surface defects 3.4 grit particles that are predominantly angular, that have fractured faces and sharp edges and that are less than half round in shape 3.5 Defect A fault or weakness in an abrasive which, if present at or above a given level, may be detrimental to the performance characteristics of the abrasive (see Table 3). 3.5.1 void a smooth-surfaced internal cavity considered undesirable when greater than 10 % of the cross-sectional area of a particle 3.5.2 shrinkage defect an internal cavity with a rough dendritic surface or a zone of microporosity, considered undesirable when greater than 40 % of the cross-sectional area of a particle 3.5.3 crack a linear discontinuity that has a length-to-width ratio of 3 : 1 or greater, that extends over more than 20 % of the diameter or shortest dimension of a particle and that is radial in direction 3.6 foreign matter any material or particles mixed with the abrasive which are not attached to the abrasive particles and which are nonmagnetic 4 Designation of abrasives High-carbon cast-steel shot and grit shall be identified by “Abrasive ISO 11124” and the abbreviation “M/HCS” indicating metallic, high-carbon cast-steel abrasive. The symbol “S” or “G” shall follow to indicate the required particle shape of the shot or grit as purchased. The designation shall be completed by a 3-digit number denoting the grade, or nominal particle size, required. If alternative hardnesses of abrasive are available, the particular Vickers hardness (HV) range required shall be specified (see example 2). EXAMPLE 1 Abrasive ISO 11124 M/HCS/S140 denotes an abrasive of the metallic, high-carbon cast-steel type, complying with the requirements of this part of ISO 11124, of particle shape shot and grade 140 (i.e. nominal particle size 1,40 mm). EXAMPLE 2 Abrasive ISO 11124 M/HCS/G140/570-710HV denotes an abrasive of the metallic, high-carbon cast-steel type, complying with the requirements of this part of ISO 11124, of particle shape grit and grade 140 (i.e. nominal particle size 1,40 mm), and with a hardness range of 570 HV to 710 HV. It is essential that this full produ