1、BRITISH STANDARD BS 5293-1: 1990 ISO 1124:1988 Sampling and testing carbon black for use in the rubber industry Part 1: Methods of samplingBS5293-1:1990 This British Standard, having been prepared under the directionof the Rubber StandardsPolicy Committee, waspublished under the authorityof the Boar
2、d of BSI andcomes into effect on 31 May 1990 BSI 09-1999 First published as BS 5293 February 1976 First revision as BS 5293-1 May 1990 The following BSI references relate to the work on this standard: Committee reference RUM/41 Draft for comment 86/38818 DC ISBN 0 580 18082 4 Committees responsible
3、for this British Standard The preparation of this British Standard was entrusted by the Rubber Standards Policy Committee (RUM/-) to Technical Committee RUM/41, upon which the following body was represented: British Rubber Manufacturers Association Amendments issued since publication Amd. No. Date o
4、f issue CommentsBS5293-1:1990 BSI 09-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Definitions 1 3 Apparatus 1 4 Sampling procedures for bulk and semi-bulk containers 1 5 Sampling procedure for packages 1 6 Treatment and storage of samples 2 7 Sampli
5、ng report 2 Figure 1 Use of sampling device 2BS5293-1:1990 ii BSI 09-1999 National foreword This Part of BS 5293 has been prepared under the direction of the Rubber Standards Policy Committee and is identical with ISO 1124:1988 “Rubber compounding ingredients Carbon black Shipment sampling procedure
6、s”, published by the International Organization for Standardization (ISO). This Part of BS 5293 is part of a revision of BS 5293:1976 as a multipart standard, parts of which are identical with ISO standards. ISO 1124:1988 is a combined revision of ISO 1124:1983 and ISO 1310:1974 “Carbon black for us
7、e in the rubber industry Sampling packaged shipments”. With regard to sampling and the degree of confidence that can be placed upon test results, attention is drawn to BS 2846 “Guide to statistical interpretation of data” and BS 6002 “Specification for sampling procedures and charts for inspection b
8、y variables for percent defective”. 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. Summa
9、ry of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 and 2 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.BS5293-1:1990
10、 BSI 09-1999 1 1 Scope This International Standard specifies procedures for the sampling of carbon black for use in the rubber industry, delivered in bulk, semi-bulk or packages. 2 Definitions For the purposes of this International Standard, the following definitions apply. 2.1 bulk carbon black del
11、ivered in containers holding not less than 2000kg 2.2 semi-bulk carbon black delivered in containers holding more than50kg and less than 2000kg 2.3 packages carbon black delivered in containers holding50kg or less 3 Apparatus 3.1 Sample splitter, single-stage riffle type. 3.2 Sampling device for pac
12、kages, comprising an open tube, of diameter not less than25mm, with a seal lip. The tube can be inserted into the package and the carbon black sample can be poured through it from the geometric centre of the package (seeFigure 1). 3.3 Airtight containers, 3 dm 3minimum capacity. 3.4 Scoop, designed
13、to cause minimum pellet breakdown. 4 Sampling procedures for bulk and semi-bulk containers 4.1 General The method is for use in obtaining representative samples of the carbon black in each container, compartment or entire vehicle. The samples may be used to determine the average quality or to ascert
14、ain the variability in quality. 4.2 Bulk Normally, each compartment of the bulk container is fitted with two laterally opposite sampling ports. After first withdrawing and discarding from each port at least5 dm 3of carbon black, take at least1kg in mass or3 dm 3in volume from each port and place in
15、an airtight container (3.3). Should a container not be fitted with sampling ports, take at least1kg in mass or3dm 3in volume from the loading ports approximately 30mm below the surface to avoid the inclusion of any surface contamination. The portions comprising the sample shall be stored individuall
16、y or composited, depending upon requirements. 4.3 Semi-bulk The procedure described in4.2 applies, but all samples shall be taken from the loading ports. 5 Sampling procedure for packages Place the package of carbon black to be sampled in an upright position. Adjust the seal lip of the sampling devi
17、ce (3.2) to a distance from the bevelled end corresponding to the depth required to reach the geometric centre of the package. Make a slit at the approximate centre of the upper end of the package. Insert the sampling tube into the cut package, with the bevelled end pointing downwards, to the requir
18、ed depth. Hold the seal lip against the package to act as a seal. Hold the package at an angle and allow the carbon black to flow through the sample tube. Discard approximately the first0,5dm 3of sample material. Remove a sufficiently large sample for testing, i.e. at least1kg in mass or3 dm 3in vol
19、ume. Finally, place the package in the upright position again, remove the sampling device and seal the package opening. Take care not to break up the pellets with the sampling device. Alternatively, use the scoop (3.4) to remove at least1kg in mass or3 dm 3in volume from the geometric centre of the
20、package after carefully removing at least30mm thickness of surface material to reach the centre of the package from the position sampled.BS5293-1:1990 2 BSI 09-1999 6 Treatment and storage of samples 6.1 If individual samples are taken for testing independently, pass each sample through the single-s
21、tage riffle-type sample splitter at least twice, in order to prevent stratification. This is particularly important if pellet quality tests are to be carried out on the samples. It is highly recommended that the mean quality of the shipment be calculated from the individual samples. This will provid
22、e maximum and minimum values (e.g. for loss on heating) as well as mean values. If individual samples are composited for tests to produce average quality data only, pass them together through the single-stage riffle-type sample splitter at least three times. 6.2 Handle the portions taken for the det
23、ermination of the pellet quality with care to avoid breakdown of the pellets. 6.3 Store the samples in airtight containers (3.3) until the tests are completed. 7 Sampling report The sampling report shall include the following information: a) a reference to this International Standard; b) the numbers
24、 of portions taken for each sample; c) the appearance of the sample or samples, with particular reference to wetness or contamination, either of the sample or of the surface above the depth at which the sample was taken; d) if the sample is a composite one, the number of portions in the composite sa
25、mple; e) identification of the samples; f) the location of each sample in the shipment; g) the mass or volume of the individual and composite samples; h) the number of packages, number of units, number of tiers or mass it represents; i) any deviation from the procedures specified in this Internation
26、al Standard. Figure 1 Use of sampling device3 blankBS 5293-1: 1990 ISO 1124:1988 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the internat
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