1、CEN ENxL237 95 3404589 0113141 OTL BRITISH STANDARD Fertilizers - Determination of bulk density (tapped) The European Standard EN 1237 : 1995 has the status of a British Standard BS EN 1237 : 1995 CEN EN*L237 95 3404589 OLL3L112 T38 W Amd. No. The following BSI references relate to the work on this
2、standard Committee reference CW37 Draft for comment 94503972 DC BS EN 1237 : 1995 Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee CIV37, Fertilizers and related chemicals, upon which the following bodie
3、s were represented: Association of Public Analysts British Aggregate Construction Materials Industries British Cod Corporation Chemical Industries Association Consumers Association Department of Trade and industry (Laboratory of the Government Chemist) Fertiliser Manufacturers Association Ltd. Horti
4、culturai fiades Association Institute of iladhg Standards Administration Ministry of Agriculture, Fisheries and Food Water Services Association of England and Wales This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under th
5、e authority of the Standards Board and comes into effect on 15 December 1995 O BSI 1995 - -I ISBN O 680 24906 9 CEN EN*L237 95 I 3404587 OLL3L43 974 BS EN 1237 : 1995 Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 introduction Method 1 Scope 2 Normative refer
6、ences 3 Denition 4 Preparation of test sample 5 Method - Machine-tapping method 6 Expression of results 2 7 Testreport 4 Annex ZA (informative) Bibliography 6 Figure 1 Apparatus for the determination of bulk density (tapped) by machine tapping 5 i CEN ENaL237 75 H 3404589 OLL3L44 800 = BS EN 1237 :
7、1996 National foreword This British standard has been prepared by Technical Committee CID37 and is the English language version of EN 1237 : 1995 Ferti.zm - Determinutwn of buUc density ( in this European Standard it is expressed in kilograms per cubic meire (kg/m3); - the normative references to in
8、ternational standards IS0 7742 : 1988 and IS0 8358 : 1991 concerning methods of sampling and sample preparation have been deleted and the method used has to be indicated in the test report; - an informative annex ZA Bibliography has been added. The common modincations have been inserted in the text
9、of the reference document and are indicated by a vertical line in the margin. Introduction The bulk densities (loose and tapped) of a fertilizer provide infodon relative to the required size of packaging materials, storehouses, stock-rooms, etc. Generally, the bulk density (tapped) is up to 10 % gre
10、ater t b) reference to the method used; c) the result and the method of expression; d) any unusual features noted during the determi- nation; e) any operation not included in this International Standard or regarded as optional; 9 methods of sampling and sample preparation. I Weigh the contents of th
11、e measuring cylinder to the nearest 1 g of the total mass. Carry out two determinations, in rapid succession, on separate test porons taken from the same test sample. 6 Expression of results 6.1 Method of calculation and formula lhe bulk density (tapped), pt. of the fertilizer is 1 given, in kdogram
12、s per cubic metre, by the equation m Pi = y where I I. m i/ is the mass, in kilograms, of the test portion; is the volume up to the brim, in cubic metres, of the measuring cylinder. CEN EN*L237 95 3404589 OLL3149 392 = Page 5 EN 1237 : 1995 Dlmenslons In milllmetres Rubber deeve tkaruring-cyllnder h
13、older wlth guide danp Camrhatt Figure 1 - Apparatus for the determination of bulk density (tapped) by machine tapping CEN ENtL237 95 3404589 OLL3L50 004 Page 6 EN 1237 : 1995 Annex ZA (informative) Bibliography Is0 3944 : 1992 ISO3963: 1977 EO 7410 : 1983 ISO7742: 1988 IS0 8358 : 1991 EN 1236 REN 14
14、82 Fertilkm - DetemLination of bulk density (loose) Fertilkm - Sampling from a cmveyor by stopping the belt Fertilkm and soil condit.ioners - Final samples - Pmctical arrangements Solid fertilixers - Reduction of samples Solid fertilkm - Prepamtion of samples for chemical and physical andysis Fertkm
15、 - Determination of buk censity (kose) Sampling of solid fertilizem CEN ENa1237 95 3404589 0113151 T40 BS EN 1237 : 1995 List of references See national foreword. CEN EN*L237 95 m 3YOY589 OLL3L52 987 m BS EN 1237 : 1995 BSI 389 Chiswick High Road London w4 4AL 9512-60.35k-FP BSI - British Standards
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