BS EN ISO 11125-2-1994 Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives Determination of particl.pdf

1、BRITISH STANDARD CONFIRMED DECEMBER 1998 BS EN ISO 11125-2:1997 BS 7079-E7: 1994 (Incorporating Amendment No. 1 to BS 7079-E7:1994 (which it renumbers as BS ENISO 11125-2:1997) Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning

2、abrasives Part 2: Determination of particle size distribution The European Standard EN ISO 11125-2:1997 has the status of a British Standard ICS 25.220.10; 87.020BSENISO11125-2:1997 This British Standard, having been prepared under the directionof the Surface Treatments and Coatings Standards Policy

3、 Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15March 1994 BSI 04-2000 The following BSI references relate to the work on this standard: Committee reference STC/21 Draft for comment 92/50235 DC ISBN 0 580 23048 1 Committees responsible for this British St

4、andard 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 Associ

5、ation 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 Co

6、lour Chemists Association Paint Research Association Royal Society of Chemistry Amendments issued since publication Amd. No. Date Comments 9730 November 1997 Indicated by a sideline in the marginBSENISO11125-2:1997 BSI 04-2000 i Contents Page Committees responsible Inside front cover National forewo

7、rd ii Foreword 2 1 Scope 3 2 Normative references 3 3 Apparatus 3 4 Sampling 3 5 Procedure 3 6 Expression of results 4 7 Precision 4 8 Test report 4 Annex A (informative) International Standards for metallic blast-cleaning abrasives 5 Annex ZA (normative) Normative references to international public

8、ations with their relevant European publications 6 Table 1 List of sieve mesh apertures to be used (from ISO 565:1990; R20/3 and R40/3 sizes) 3 List of references Inside back coverBSENISO11125-2:1997 ii BSI 04-2000 National foreword This British Standard has been prepared by Technical Committee STC/

9、21 and is the English language version of EN ISO 11125-2:1997 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, published by the European Committee for Standardizat

10、ion (CEN). It is identical with ISO11125-3:1993, published by the International Organization for Standardization (ISO). International Standard ISO 11125-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 12. Preparation of steel substrates before application of pa

11、ints and related products. The other Parts of BS EN ISO 11125 are: Part 1: Sampling; Part 3: Determination of hardness; Part 4: Determination of apparent density; Part 5: Determination of percentage defective particles and of microstructure; Part 6: Determination of foreign matter; Part 7: Determina

12、tion of moisture. Cross-reference 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. Publica

13、tion referred to Corresponding British Standard EN ISO 11125-1:1997 (ISO 11125-1:1993) BS EN ISO 11125 Preparation of steel substrates before application of paints and related products Test methods for metallic blast-cleaning abrasives Part 1:1997 Sampling Summary of pages This document comprises a

14、front cover, an inside front cover, pages i and ii, theEN ISO title page, pages 2 to 6, 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.EUROPEA

15、N STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11125-2 June 1997 ICS 87.020 Descriptors: Paints, varnishes, substrates, steel products, blast-cleaning, abrasives, metallic abrasives, tests, size classification, grain size analysis, sieve analysis English version Preparation of steel substrates be

16、fore application of paints and related products Test methods for metallic blast-cleaning abrasives Part 2: Determination of particlesize distribution (ISO 11125-2:1993) Prparation des subjectiles dacier avant application de peintures et de produits assimils Mthodes dessai pour abrasifs mtalliques de

17、stins la prparation par projection Partie 2: Analyse granulomtrique (ISO 11125-2:1993) Vorbereitung von Stahloberflchen vor dem Auftragen von Beschichtungsstoffen Prfverfahren fr metallische Strahlmittel Teil 2: Bestimmung der Korngrenverteilung (ISO 11125-2:1993) This European Standard was approved

18、 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 standar

19、ds 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 th

20、e Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKi

21、ngdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr 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 11125

22、-2:1997 EENISO11125-2:1997 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 varn

23、ishes, 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.

24、 According to CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portuga

25、l, Spain, Sweden, Switzerland and the UnitedKingdom. NOTENormative references to International Standards are listed in Annex ZA (normative)ENISO11125-2:1997 BSI 04-2000 3 1 Scope This is one of a number of parts of ISO 11125 dealing with the sampling and testing of metallic abrasives for blast-clean

26、ing. The types of metallic abrasive and requirements on each are contained in the various parts of ISO11124. The ISO 11124 and ISO 11125 series have been drafted as a coherent set of International Standards on metallic blast-cleaning abrasives. Information on all parts of both series is given in Ann

27、ex A. This part of ISO 11125 specifies a test method for the determination of particle size distribution of metallic blast-cleaning abrasives by sieving. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO

28、 11125. 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 11125 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC

29、and ISO maintain registers of currently valid International Standards. ISO 565:1990, Test sieves Metal wire cloth, perforated metal plate and electroformed sheet Nominal sizes of openings. ISO 11125-1:1993, Preparation of steel substrates before application of paints and related products Test method

30、s for metallic blast-cleaning abrasives Part 1: Sampling. 3 Apparatus Ordinary laboratory apparatus and glassware, together with the following: 3.1 Balance, capable of weighing to an accuracy of0,1g. 3.2 Test sieves, circular, with a height of 25 mm to50mm and a sieving area approximately 200 mm dia

31、meter, made of woven metal wire cloth. The frame of the test sieves shall be of metal. The range of nominal mesh apertures depends on the specification for the product to be tested and shall comply with the requirements of Table 2 in ISO565:1990 as indicated inTable 1. The sieves shall have square o

32、penings. A lid and a residue pan shall also be provided. NOTE 1Smaller-diameter sieves may not produce accurate separation of the sample. Sieves shall be regularly checked for calibration and freedom from retained abrasive. Table 1 List of sieve mesh apertures to be used (from ISO 565:1990; R20/3 an

33、d R40/3 sizes) 3.3 Rotating and tapping machine, to agitate the sample. Sieving shall be carried out in a suitable type of sieving machine having both a rotatory movement and a vertical movement producing a sharp jolting or tapping action. The machine shall be placed on a solid base. NOTE 2Hand siev

34、ing, or other mechanical systems based on vibration or rotation only, will not produce accurate separation of the sample. 3.4 1/1 sample divider 4 Sampling Take a representative sample of the product to be tested, as described in ISO 11125-1. 5 Procedure Carry out the determination in duplicate. 5.1

35、 Using the 1/1 sample divider (3.4), obtain a sample of approximately 100g. 5.2 Weigh out, using the balance (3.1), (100 0,5) g of the sample (m 0 ). NOTE 3Increased test-portion mass may lead to inaccurate separation. 5.3 Use all the test sieves listed against the grade under test as given in the g

36、rade and screening specification table in the appropriate part of ISO11124 (see Annex A) or, in the case of materials not covered by ISO 11124, as otherwise agreed between the interested parties. 5.4 Arrange the test sieves (3.2) with the largest-aperture sieve on the top and progress to thesmallest

37、 aperture at the bottom, with a pan to catch any abrasive that falls through the finest sieve. 5.5 Place the test portion in the top sieve. 5.6 Place a cover over the top sieve. mm mm mm 0,045 0,355 1,40 0,053 0,425 1,70 0,063 0,500 2,00 0,075 0,600 2,36 0,125 0,710 2,80 0,180 0,850 3,35 0,250 1,00

38、4,00 0,300 1,18 4,75ENISO11125-2:1997 4 BSI 04-2000 5.7 Place the stack of sieves with the test portion in the rotating and tapping machine (3.3) and agitate for a minimum of10min for round abrasives and a minimum of15min for angular abrasives. NOTE 4The agitation time is chosen so that increasing i

39、t by5min will result in no more than a0,5% change in the cumulative mass retained for any sieve in the stack. 5.8 Carefully remove the top sieve from the stack and transfer any retained abrasive on to the balance pan. Brush the sieve clean of any trapped abrasive and add this to the balance pan. Wei

40、gh to the nearest 0,1g and record this result (m 1 ). Repeat for all the sieves in the stack, including the retaining pan, adding each fraction retained to that previously weighed. Calculate and record the cumulative percentage retained for each sieve. If less than99% of the original mass is re-capt

41、ured, retest. 6 Expression of results For each test sieve used, and for the residue in thepan, calculate the percentage of material retained R, expressed as a percentage by mass, using the equation where If the duplicate determinations of cumulative material retained for each test sieve differ by mo

42、re than10% (relative to the higher result), repeat the procedure described in clause 5. Calculate the mean of two valid determinations of cumulative material retained. Report the result to the nearest1%. 7 Precision Variation of sieve openings within the limits allowable in ISO 565 can cause major d

43、ifferences in results on the same material. Where deviation is experienced, an exchange of samples or sieves between customer and supplier is strongly recommended. 8 Test report The test report shall contain at least the following information: a) all details necessary to identify the product tested

44、in accordance with the appropriate part of ISO 11124 (see Annex A), if applicable; b) a reference to this part of ISO 11125 (ISO11125-2); c) the result of the test; d) any deviation from the test method specified; e) the date of the test; f) the name of the person who carried out the test. m 0 is th

45、e mass, in grams, of the test portion; m 1 is the mass, in grams, of the residue on the sieve (or in the pan).ENISO11125-2:1997 BSI 04-2000 5 Annex A (informative) International Standards for metallic blast-cleaning abrasives Requirements and test methods for metallic blast-cleaning abrasives are co

46、ntained in ISO 11124 and ISO 11125, respectively. ISO 11124 will consist of the following parts, under the general title: Preparation of steel substrates before application of paints and related products Specification for metallic blast-cleaning abrasives Part 1: General introduction and classificat

47、ion Part 2: Chilled-iron grit Part 3: High-carbon cast-steel shot and grit Part 4: Low-carbon cast-steel shot Part 5: Cut steel wire ISO 11125 will consist of the following parts, under the general title: Preparation of steel substrates before application of paints and related products Test methods

48、for metallic blast-cleaning abrasives Part 1: Sampling Part 2: Determination of particle size distribution Part 3: Determination of hardness Part 4: Determination of apparent density Part 5: Determination of percentage defective particles and of microstructure Part 6: Determination of foreign matter

49、 Part 7: Determination of moisture Part 8: Determination of abrasive mechanical propertiesENISO11125-2:1997 6 BSI 04-2000 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references,