1、BRITISH STANDARD BS 7372-3: 1993 ISO 4783-3: 1981 Guide to Choice of aperture size and wire diameter combinations for industrial wire screens and woven wire cloth Part 3: Preferred combinations for pre-crimped or pressure-welded wire screens UDC 621.928.2BS7372-3:1993 This British Standard, having b
2、een prepared under the directionof the Laboratory Apparatus Standards Policy Committee, was published underthe authority of the Standards Board and comes into effect on 15 September 1993 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference LBC/37 Special
3、announcement in BSI News July 1993 ISBN 0 580 22540 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Laboratory Apparatus Standards Policy Committee (LBC/-) to Technical Committee LBC/37, upon which the following bodies were represented
4、: BLWA Ltd. (The Association of the Laboratory Supply Industry) British Cement Association British Coal Corporation Coated Abrasives Manufacturers Association Guild of Metal Perforators Institution of Chemical Engineers Institution of Mining and Metallurgy Ministry of Defence National Association of
5、 British and Irish Millers Society of Chemical Industry Society of Cosmetic Scientists Woven Wire Association Coopted members The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Aluminium Federation British Aggregate Construction Materials In
6、dustries Chemical Industries Association Institution of Mining Engineers Oil and Colour Chemists Association Royal Society of Chemistry University of Bradford Amendments issued since publication Amd. No. Date CommentsBS7372-3:1993 BSI 07-1999 i Contents Page Committees responsible Inside front cover
7、 National foreword ii 1 Scope and field of application 1 2 References 1 3 Designation 1 4 Aperture size and wire diameter combinations 1 5 Mass per unit area 1 Figure Width of aperture and diameter of wire 1 Table 1 Types and screen conversion factors2 Table 2 Preferred aperture size and wire diamet
8、er combinations 3 List of references Inside back coverBS7372-3:1993 ii BSI 07-1999 National foreword This Part of BS7372 has been prepared under the direction of the Laboratory Apparatus Standards Policy Committee. It is identical with ISO4783-3:1981 Industrial wire screens and woven wire cloth Guid
9、e to the choice of aperture size and wire diameter combinations Part3: Preferred combinations for pre-crimped or pressure-welded wire screens, published by the International Organization for Standardization (ISO). ISO4783-3:1981 was prepared by Technical Committee24 of ISO, with the UK taking an act
10、ive part. BS7372 consists of the following Parts: Part 1: General; Part 2: Preferred combinations for woven wire cloth; Part 3: Preferred combinations for pre-crimped or pressure-welded wire screens. Parts 1 and 2 are identical with ISO4783-1:1989 and ISO4783-2:1989, respectively. It was originally
11、intended that ISO4783-3:1981 would not be considered for implementation as a British Standard until it had been revised. However, revision of the ISO standard has not taken place, and the Technical Committee has agreed that, to avoid further delay, the international standard should be implemented in
12、 its current form. BS7372-3:1993 supersedes BS481-2:1972, which is withdrawn. The Technical Committee has reviewed the provisions of ISO2194:1991 and ISO4782:1987, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A
13、related British Standard for ISO2194 is BS410:1986. There is no British Standard corresponding to ISO4782. 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 St
14、andard does not of itself confer immunity from legal obligations. Cross-references International standard Corresponding British Standard ISO 3:1973 BS2045:1965 Preferred numbers ISO 497:1973 (Technically equivalent) BS7372 Guide to the choice of aperture size and wire diameter combinations for indus
15、trial wire screens and woven wire cloth ISO 4783-1:1989 Part1:1991 General (Identical) ISO 4783-2:1989 Part 2:1991 Preferred combinations for woven wire cloth (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 6, an inside back cover
16、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.ISO 4783/3-1981 (E) BSI 07-1999 1 1 Scope and field of application This part of ISO4783 tabulates preferred combinat
17、ions of aperture size and wire diameter for pre-crimped or pressure welded wire screens for industrial purposes which are taken from the general list of aperture/wire combinations given in ISO4783-1. It applies to wire screens of aperture size from125to1mm. NOTEThis is the first International Standa
18、rd on pre-crimped or pressure welded wire screens for industrial purposes; these specifications are a compromise which takes account of existing national standards. ISO Member Bodies are earnestly requested to rationalize further in order to reduce the number of wire diameters per aperture width wit
19、hin the next5 years without excluding the option of increasing the numbers of preferred apertures. Part2 of this International Standard gives the preferred combinations for woven-wire cloth. 2 References ISO 3, Preferred numbers Series of preferred numbers. ISO497, Guide to the choice of series of p
20、referred numbers and of series containing more rounded values of preferred numbers. ISO2194, Wire screens and plate screens for industrial purposes Nominal sizes of apertures. ISO4782, Industrial wire screens and woven wire cloth Diameters of metal wire. ISO4783, Industrial wire screens and woven wi
21、re cloth Guide to the choice of aperture size and wire diameter combinations. ISO4783-1, Generalities. ISO4783-2, Preferred combinations for woven wire cloth. 3 Designation Pre-crimped or pressure welded screens for industrial purposes shall be designated in the following sequence by a) width of ape
22、rture w; b) diameter of wire d; c) material of wire; d) type (see Table 1). 4 Aperture size and wire diameter combinations Table 2 lists the preferred combinations of aperture size and wire diameter for wire screens and states the open area, A oand the mass per square metre,A A , for each combinatio
23、n. 5 Mass per unit area The mass per unit area, A A , of pre-crimped or pressure welded wire screens is given, in kilograms per square metre, by the formula where Values for f shall be taken from Table 1. For wires of plain or carbon steel, A = 7850 kg/m 3 . For wires of stainless steel, A = 7800kg/
24、m 3 . Figure Width of aperture and diameter ofwire d is the diameter of wire, in millimetres; w is the width of aperture, in millimetres; f is the screen conversion factor; A is the material density, in kilograms per cubic metre. A A d 2A f 618,1 wd + () - =ISO 4783/3-1981 (E) 2 BSI 07-1999 Table 1
25、Types and screen conversion factors Type Figure Designation Screen conversion factor f a A Double crimp screen 1,00 B Single intermediate crimp screen 1,03 C Double intermediate crimp screen 1,06 D Lock crimp screen 1,03 E Flat-top screen 1,00 F pressure-welded screen 0,98 a These factors are given
26、as a guideline. Actual values may vary depending on the weaving process.ISO 4783/3-1981 (E) BSI 07-1999 3 Table 2 Preferred aperture size and wire diameter combinations Width of aperture Diameter of wire Open area Mass aper unit area Width of aperture Diameter of wire Open area Mass aper unit area R
27、 10 R 20 R 40/3 R 10 R 20 R 40/3 w w w d A o A A w w w d A o A A mm mm mm mm % kg/m 2 mm mm mm mm % kg/m 2 125 125 125 10,0 12,5 16,0 20,0 25,0 86 83 79 74 69 9,41 14,43 23,06 35,03 52,92 45 45 6,30 8,00 10,0 12,5 16,0 77 72 67 61 54 9,83 15,34 23,09 34,51 53,31 112 10,0 12,5 16,0 20,0 84 81 77 72 1
28、0,41 15,94 25,40 38,48 40 40 6,30 8,00 10,0 12,5 75 69 64 58 10,89 16,93 25,40 37,80 106 10,0 12,5 16,0 20,0 84 80 75 71 10,95 16,75 26,65 40,32 37,5 6,30 8,00 10,0 12,5 74 68 63 56 11,51 17,67 26,46 39,69 25,0 65 60,59 35,5 5,00 77 7,84 100 100 10,0 12,5 16,0 83 79 74 11,55 17,64 28,03 6,30 8,00 10
29、,0 72 67 61 12,06 18,96 27,91 20,0 25,0 69 64 42,33 63,50 31,5 31,5 31,5 5,00 6,30 74 69 8,70 13,34 90 90 10,0 12,5 81 77 12,70 19,36 8,00 10,0 64 58 20,58 30,60 16,0 20,0 72 67 30,67 46,18 28 5,00 6,30 72 67 9,62 14,70 80 80 10,0 12,5 79 75 14,11 21,45 8,00 10,0 60 54 22,58 33,42 16,0 20,0 69 64 33
30、,87 50,80 26,5 5,00 6,30 71 65 10,08 15,37 75 10,0 12,5 78 73 14,94 22,68 8,00 10,0 59 53 23,56 34,80 16,0 20,0 69 62 35,73 33,47 25 25 4,00 5,00 74 69 7,01 10,58 71 10,0 12,5 16,0 77 72 67 15,68 23,76 37,37 6,30 8,00 10,0 64 57 51 16,10 24,63 36,29 20,0 61 55,82 22,4 22,4 4,00 72 7,70 63 63 63 8,00
31、 10,0 12,5 79 74 70 11,45 17,40 25,12 5,00 6,30 8,00 67 61 54 11,59 17,56 26,74 16,0 64 41,45 20 20 3,15 75 5,44 56 8,00 10,0 12,5 16,0 77 72 67 61 12,70 19,24 28,97 45,16 4,00 5,00 6,30 8,00 69 64 58 51 8,47 12,70 19,17 29,03 53 8,00 10,0 12,5 16,0 75 71 65 59 13,32 20,16 30,30 47,12 19 4,00 5,00 6
32、,30 8,00 68 63 56 50 8,83 13,92 19,92 30,10 50 50 6,30 8,00 10,0 12,5 16,0 79 74 69 64 57 8,95 14,01 21,17 31,75 49,26 18 3,15 4,00 5,00 6,30 8,00 72 67 61 55 48 5,96 9,24 13,80 20,74 31,26 a For type A (seeTable 1) of plain or carbon steel, A = 7 850kg/m 3 (see clause 5).ISO 4783/3-1981 (E) 4 BSI 0
33、7-1999Table 2 Preferred aperture size and wire diameter combinations Width of aperture Diameter of wire Open area Mass aper unit area Width of aperture Diameter of wire Open area Mass aper unit area R 10 R 20 R 40/3 R 10 R 20 R 40/3 w w w d A o A A w w w d A o A A mm mm mm mm % kg/m 2 mm mm mm mm %
34、kg/m 2 16 16 16 2,50 3,15 4,00 5,00 75 70 64 58 4,29 6,58 10,16 15,12 5,6 5,6 1,60 2,00 2,50 3,15 60 54 48 41 4,52 6,68 9,80 14,40 6,30 51 22,60 14 2,50 3,15 4,00 5,00 72 67 60 54 4,81 7,35 11,29 16,71 5 5 1,60 2,00 2,50 3,15 57 51 44 38 4,93 7,26 10,58 15,46 6,30 48 24,83 13,2 3,15 4,00 5,00 6,30 6
35、5 59 53 46 7,71 11,81 17,47 25,85 4,75 1,60 1,80 2,24 3,15 56 53 47 36 5,12 6,28 9,12 15,95 12,5 12,5 2,50 3,15 4,00 5,00 69 64 57 51 5,29 8,05 12,32 18,41 4,5 1,40 1,80 2,24 2,50 58 51 45 41 4,22 6,53 9,45 11,34 6,30 44 26,81 11,2 11,2 2,50 3,15 3,55 4,00 67 61 58 54 5,79 8,78 10,85 13,37 4 4 4 1,2
36、5 1,60 2,00 2,24 58 51 45 41 3,78 5,81 8,47 10,21 5,00 48 19,60 2,50 38 12,21 10 10 2,00 69 4,23 2,50 3,15 4,00 5,00 64 58 51 44 6,35 9,58 14,51 21,17 3,55 1,25 1,40 1,60 1,80 55 51 48 44 4,13 5,03 6,31 7,69 9,5 2,24 65 5,43 2,00 41 9,15 3,15 4,00 5,00 56 50 43 9,96 15,05 21,90 3,35 1,00 1,25 1,80 5
37、9 53 42 2,92 4,31 7,99 9 1,80 2,24 69 64 3,81 5,67 2,24 36 11,40 2,50 3,15 4,00 61 55 48 6,90 10,37 15,63 3,15 3,15 1,12 1,40 1,60 54 48 44 3,73 5,47 6,84 8 8 8 2,00 2,50 3,15 64 58 51 5,08 7,56 11,30 1,80 2,00 41 37 8,31 9,86 3,55 4,00 48 44 13,86 16,93 2.8 2,8 0,900 1,12 57 51 2,78 4,06 7,1 1,80 2
38、,00 64 61 4,62 5,58 1,40 1,80 45 37 5,93 8,95 2,50 3,15 55 48 8,27 12,29 2,5 2,5 1,00 1,12 51 48 3,63 4,40 6,7 1,80 2,50 3,15 4,00 62 53 46 39 4,84 8,63 12,79 18,99 1,25 1,40 1,60 44 41 37 5,29 6,38 7,93 6,3 6,3 1,60 2,00 2,50 3,15 64 58 51 44 4,12 6,12 9,02 13,34 2,36 0,800 1,00 1,40 1,80 56 49 39
39、32 2,57 3,78 6,62 9,89 a For type A (seeTable 1) of plain or carbon steel, A = 7 850 kg/m 3(see clause 5).ISO 4783/3-1981 (E) BSI 07-1999 5 Table 2 Preferred aperture size and wire diameter combinations Width of aperture Diameter of wire Open area Mass aper unit area R 10 R 20 R 40/3 w w w d A o A A
40、 mm mm mm mm % kg/m 2 2,24 0,710 0,900 1,12 1,40 58 51 44 38 2,17 3,28 4,74 6,84 2 2 2 0,710 0,800 0,900 1,12 1,25 54 51 48 41 38 2,36 2,90 3,55 5,11 6,11 1,8 0,710 0,900 1,12 1,40 51 45 38 32 2,55 3,81 5,46 7,78 1,7 0,630 0,800 1,12 1,40 53 46 36 30 2,16 3,25 5,65 8,03 1,6 1,6 0,500 0,630 0,800 1,0
41、0 58 51 44 38 1,51 2,26 3,39 4,88 1,4 1,4 0,450 0,560 0,710 0,900 57 51 44 37 1,39 2,03 3,03 4,47 1,25 1,25 0,400 0,500 0,630 0,800 57 51 44 37 1,23 1,81 2,68 3,96 1,18 0,450 0,630 0,710 52 43 36 1,58 2,78 3,39 1,12 0,450 0,560 0,710 51 44 37 1,64 2,37 3,50 1 1 1 0,400 0,500 0,630 0,710 51 44 38 34
42、1,45 2,12 3,09 3,74 a For type A (seeTable 1) of plain or carbon steel, A = 7 850 kg/m 3(see clause 5).6 blankBS7372-3:1993 BSI 07-1999 List of references See national foreword.BS7372-3: 1993 ISO 4783-3: 1981 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independ
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