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1、BRITISH STANDARD BS 5551-2.3: 1978 ISO 3963:1977 Incorporating Amendment No. 1 Fertilizers Part 2: Sampling Section 2.3: Sampling from a conveyor by stopping the belt reference method ISO title: Fertilizers Sampling from a conveyor by stopping the belt UDC 631.8:543.05:621.867.2 Licensed Copy: sheff
2、ieldun sheffieldun, na, Mon Dec 04 14:22:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5551-2.3:1978 This British Standard, having been prepared under the direction of the Chemicals Standards Committee, was published under the authority of the Executive Board on 31 January 1978 BSI 10-1999 The fo
3、llowing BSI references relate to the work on this standard: Committee reference CIC/37 Draft for comment 75/53678 DC ISBN 0 580 09989 X Cooperating organizations The Chemicals Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the followin
4、g Government departments and scientific and industrial organizations: Association of Fatty Acid Distillers British Tar Industry Association Chemical Industries Association* Chemical Society, Analytical Division Department of Health and Social Security Department of Industry, Chemicals and Textiles D
5、ivision Department of Industry, Laboratory of the Government Chemist* Fertiliser Manufacturers Association Ltd.* Hydrocarbon Solvents Association Institution of Gas Engineers Ministry of Agriculture, Fisheries and Food* Ministry of Defence National Sulphuric Acid Association Paintmakers Association
6、of Great Britain Ltd. Royal Institute of Public Health and Hygiene Soap and Detergent Industry Association Standardization of Tar Products Tests Committee The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted wi
7、th the preparation of this British Standard: British Agrochemicals Association Institute of Trading Standards Administration Amendments issued since publication Amd. No.Date of issueComments 6962February 1992Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04
8、 14:22:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5551-2.3:1978 BSI 10-1999i Contents Page Cooperating organizationsInside front cover National forewordii 0Introduction1 1Scope and field of application1 2References1 3Principle1 4Apparatus1 5Procedure1 6Sampling report1 Publications referred to
9、Inside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:22:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5551-2.3:1978 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Chemicals Standards Committee in order to standardize term
10、inology and labelling, sampling and methods of physical and chemical testing for fertilizers. For some years the United Kingdom has participated in the standardization of methods of sampling fertilizers through Subcommittee 2, Sampling, of Technical Committee 134, Fertilizers and soil conditioners,
11、of the International Organization for Standardization (ISO). As international agreement is reached on the methods, it is proposed to publish them as Sections of BS 5551. The standard is to be published in 4 Parts, each Part being subdivided into Sections and, where appropriate, Subsections. The four
12、 main Parts are: Part 1: Terminology and labelling; Part 2: Sampling; Part 3: Physical properties; Part 4: Chemical analysis. This Section of Part 2 is identical with ISO 3963 “Fertilizers Sampling from a conveyor by stopping the belt”. Terminology and conventions. The text of the International Stan
13、dard has been accepted as suitable for publication, without deviation, as a British Standard. Certain terminology is used, however, that is not identical with that used in British Standards. Attention is therefore drawn to the following. Where the words “International Standard” relating to this publ
14、ication, appear, they should be interpreted as “British Standard”. Cross references. For each of the following references to other International Standards that are given in the text, there is an equivalent British Standard; these are as listed below: A British Standard does not purport to include al
15、l 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. International StandardCorresponding British Standard BS 5551 Fertilizers Part 2 Sampling I
16、SO 5306:1983aSection 2.2:1984 Presentation of sampling reports (Identical) ISO 8634:1991bSection 2.9:1991 Sampling plan for the evaluation of a large delivery of solid fertilizer (Identical) a “ISO . Fertilizers Sampling report” was published in 1983 as ISO 5306 “Fertilizers Presentation of sampling
17、 reports”. b “ISO . Fertilizers Sampling” was published in 1991 as ISO 8634 “Solid fertilizers Sampling plan for the evaluation of a large delivery”. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. T
18、his 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: sheffieldun sheffieldun, na, Mon Dec 04 14:22:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5551-2.3:1978 BSI 10-199
19、91 0 Introduction Taking a representative sample from a consignment of fertilizer by sampling from a conveyor by stopping the belt is time consuming and interrupts the loading or unloading process considerably. The method should be used only where other methods, such as automatic sampling or scoop s
20、ampling from a free fall, are impossible, or as a reference method to assess the accuracy of other techniques. The procedure given applies to each increment to be taken to form the final sample. The size of each increment, the number of increments or the frequency of sampling is found by reference t
21、o ISO . . . SAFETY The sampling method involves contact with machinery which is normally in motion. Safety precautions must be such that there is no possibility of the conveyor starting up while the increments are being taken. An override start/stop button should be provided at the point of sampling
22、. The sampler should be able to reach the whole cross-section of the belt without undue physical strain. The position of sampling should be made as convenient as possible, for example by using a suitable platform. 1 Scope and field of application This International Standard specifies a reference met
23、hod for sampling all solid fertilizers transported on a conveyor belt from the place of manufacture or storage to some other location. 2 References ISO . . ., Fertilizers Sampling1). ISO . . ., Fertilizers Sampling report1). 3 Principle Stopping of the belt conveying the fertilizer. Insertion of two
24、 parallel boards or metal sheets vertically down into and at right angles to the stream of fertilizer and to the axis of the conveyor belt. Removal of the material between the boards or sheets. 4 Apparatus Two parallel boards or metal sheets shaped to the characteristics of the trough of the belt, s
25、ufficiently long to project beyond the sides of the belt by 500 mm and sufficiently wide for the upper edge to be at least 50 mm above the top of the fertilizer on the belt. It is recommended that a metal frame be made to carry the boards or metal sheets. This frame can then be placed across the bel
26、t in a single operation. Failing this, two marks should be made on the supporting structure on each side of the belt so that the boards or metal sheets can be inserted in the same places each time. 5 Procedure Care must be exercised when samples are being taken from inclined belts. The boards shall,
27、 in these cases, be inserted rapidly and at right angles to the stream to avoid backflow. Select a suitable position on the conveyor belt where the fertilizer is well spread out and the stream stabilized, at least 1 m from the feed to the conveyor; stop the belt. Do not take a sample if there is a s
28、mall feed at that time or if the flow has only just started or is just finishing. Once the belt has stopped, insert the two boards or metal sheets vertically down into the stream of fertilizer and at a sufficient distance apart to give an increment larger than the minimum mass required according to
29、ISO . . . Push the boards gently down until they are in contact with the belt across the whole section. Any fertilizer obstructing the insertion of the boards shall be pushed: a) in the case of the downstream board, into the sample; b) in the case of the upstream board, out of the sample. As quickly
30、 as possible, completely remove the material between the two boards into a suitable air-tight container. Remove the boards or metal sheets and re-start the conveyor. Make sure that nothing has been left on the belt which could cause damage further down the line. Repeat the process for each increment
31、, the number or frequency of the increments being decided by the sampling scheme. 6 Sampling report The sampling report shall follow the provisions of ISO . . . NOTEUntil this is published the following particulars shall be included: a) all information necessary for the complete identification of th
32、e sample; b) the method used, making reference to this International Standard; c) the sampling conditions; d) any operations not specified in this International Standard or regarded as optional, as well as any factors likely to have influenced the results. 1) In preparation. Licensed Copy: sheffield
33、un sheffieldun, na, Mon Dec 04 14:22:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 blank Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:22:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5551-2.3:1978 BSI 10-1999 Publications referred to See national foreword Licensed Copy: sheffieldun
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