BS-7425-1-1991 ISO-9136-1989.pdf
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1、BRITISH STANDARD BS 7425-1: 1991 ISO 9136:1989 Abrasive grains Part 1: Method for the determination of the bulk density of macrograins Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:34:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7425-1:1991 This British
2、 Standard, having been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 28 February 1991 BSI 11-1999 The following BSI references relate to the work on this standard: Co
3、mmittee reference MTE/3 Draft for comment 88/73312 DC ISBN 0 580 19414 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committee MTE/3, upon which the fo
4、llowing bodies were represented: Abrasive Industries Association Advanced Manufacturing Technology Research Institute British Paper and Board Industry Federation Coated Abrasives Manufacturers Association Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank Unive
5、rsity, London South Bank University, Fri Dec 08 11:34:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7425-1:1991 BSI 11-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Apparatus1 5Calibration of the measuring cylinder1
6、6Method of measurement1 7Expression of results2 Figure 1 Apparatus for the determination of the bulk density of abrasive macrograins3 Publication(s) referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:34:49 GMT+00:00 2006, Uncontrolle
7、d Copy, (c) BSI BS 7425-1:1991 ii BSI 11-1999 National foreword This Part of BS 7425 has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee. It is identical with ISO 9136:1989 “Abrasive macrograins Determination of bulk density”, which was prepared
8、by Technical Committee ISO/TC 29 of the International Organization for Standardization (ISO) and in the development of which the United Kingdom played an active part. Cross-references The Technical Committee has reviewed the provisions of ISO 8486:1986, to which reference is made in the text, and ha
9、s decided that they are acceptable for use in conjunction with this standard. ISO 6344-1, to which reference is made in clause 3 for information only, is still in preparation: it is intended to dual number this standard as a British Standard once it has been published. A British Standard does not pu
10、rport 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
11、 cover, pages i and ii, pages 1 to 4, 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. Licensed Copy: London South Bank University, London Sout
12、h Bank University, Fri Dec 08 11:34:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7425-1:1991 BSI 11-19991 1 Scope This International Standard specifies a test method for the determination of the bulk density of bonded and coated abrasive macrograins. 2 Normative references The following standard
13、s contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to inv
14、estigate 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 6344-1:, Coated abrasives Grain size analysis Part 1: Definitions, designation and principle1). ISO 8486:1986, Bon
15、ded abrasives Grain size analysis Designation and determination of grain size distribution of macrogrits F4 to F220. 3 Definitions For the purposes of this International Standard, the definitions given in ISO 6344-1 and ISO 8486 and the following definition apply. bulk density of abrasive macrograin
16、s mass of a given volume of the abrasive grains, expressed in grams per cubic centimetre (g/cm3) 4 Apparatus The test apparatus is illustrated in Figure 1. It consists of the following elements. 4.1 Stand An exact description of the stand is not necessary. The only requirement is that it is capable
17、of holding the funnel in a vertical position so that the bottom of the funnel is 76 mm 1 mm above the top of the measuring cylinder. 4.2 Funnel The slope of the funnel shall be such that fine grains will not adhere to the sides. By preference, the funnel shall be made of stainless steel with smooth
18、inside seams. Its dimensional characteristics (see also Figure 1) shall be as follows: total height of funnel: 240 mm diameter of top: 160 mm inside diameter of the cylindrical outlet: 20 mm 0,5 mm height of the cylindrical outlet area: 40 mm 1 mm 4.3 Funnel release valve An exact description of the
19、 funnel release valve is not necessary. The only requirement is that quick opening of the valve is ensured. Figure 1 illustrates a swinging stopper release valve as an example. 4.4 Measuring cylinder The volume of the measuring cylinder shall be approximately 200 cm3 and its internal diameter shall
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