1、BRITISH STANDARD BS6511:1984 ISO7806:1983 Specification for Designation of perforations in industrial plate screens UDC 621.928.2BS6511:1984 This BritishStandard, having been prepared under the directionof the Chemical andPetroleum Engineering Standards Committee, waspublished under the authorityof
2、the Board ofBSIandcomes into effect on 28September1984 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference CPE/10 Draft for comment82/80281 DC ISBN 0 580 13934 4 Committees responsible for this BritishStandard The preparation of this BritishStandard was
3、entrusted by the Chemical and Petroleum Engineering Standards Committee (CPE/-) to Technical Committee CPE/10 upon which the following bodies were represented: Bcira British Aggregate Construction Materials Industries British Ceramic Society British Laboratory Ware Association Cement and Concrete As
4、sociation Cement Makers Federation Coated Abrasives Manufacturers Association Department of Trade and Industry (Warren Spring Laboratory) Department of Transport Guild of Metal Perforators Incorporated National Association of British and Irish Millers Institution of Chemical Engineers Institution of
5、 Mining and Metallurgy Mechanical Handling Engineers Association Ministry of Defence National Coal Board Society of Chemical Industry University of Bradford Woven Wire Association The following was also represented in the drafting of the standard, through subcommittees and panels: Minerals Engineeri
6、ng Society Amendments issued since publication Amd. No. Date of issue CommentsBS6511:1984 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope and field of application 1 2 Reference 1 3 Definitions 1 4 Designation 1 5 Codification 1 Figure 1 Code for sha
7、pe of holes 1 Figure 2 Examples of coded shape of hole and aperture size 2 Figure 3 U-arrangement 2 Figure 4 Z-arrangement 2 Figure 5 M-arrangement 3 Figure 6 T-arrangement 3 Figure 7 Example R10 U15 20 3 Figure 8 Example C5 Z10 20 3 Figure 9 Example LR3 10 U12 18 3 Figure 10 Example LC3 10 Z18 12 4
8、 Figure 11 Example C10 U20 4 Figure 12 Example LC10 15 U20 4 Figure 13 Example CD8 M12.5 4 Figure 14 Example H10 T16 4 Figure 15 T-arrangement, Orientation1 5 Figure 16 T-arrangement, Orientation2 5 Figure 17 Example C5 Z10 18 Orientation1 6 Figure 18 Example C5 Z10 18 Orientation2 6 Figure 19 Examp
9、le LR3 18 Z12 36 Orientation1 7 Figure 20 Example LR3 18 Z12 36 Orientation2 7 Publication referred to Inside back coverBS6511:1984 ii BSI 12-1999 National foreword This BritishStandard has been prepared under the direction of the Chemical and Petroleum Engineering Standards Committee and is based o
10、n international discussions in which the UK has taken an active part. It is identical with ISO7806:1983 “Industrial plate screensCodification for designating perforations” which was published by the International Organization for Standardization (ISO) and was prepared by Technical Committee ISO/TC24
11、, Sieves, sieving and other sizing methods. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a BritishStandard without deviation. Some terminology and certain conventions are not identical with those used in BritishStandards; attent
12、ion is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “Britis
13、h Standard”. Cross-reference. The Technical Committee has reviewed the provisions of ISO2395, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. Textual error. When adopting the text of the International Standard, the textual e
14、rror given below was discovered. It has been marked in the text and has been reported to ISO in a proposal to amend the text of the International Standard. Figure 8. In the title “Z10 20” should be read as “Z15 20”. A British Standard does not purport to include all the necessary provisions of a con
15、tract. 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 cover, pagesi andii, pages1 to8, 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.BS6511:1984 BSI 12-1999 1 0 Introduction The system laid down in this International Standard codifies the designati
17、on of perforated plate in order to facilitate communication between purchaser and supplier. It is based on work carried out in1968 by the European association of manufacturers of perforated plate (EUROPERF). It is recommended that this system be applied worldwide, in order to discourage the developm
18、ent and use of a diversity of national codes. 1 Scope and field of application This International Standard specifies the code for designating various kinds of perforations and their arrangements in perforated plate. It applies to perforated plate regardless of the plate material. 2 Reference ISO2395
19、, Test sieves and test sieving Vocabulary. 3 Definitions For the purpose of this International Standard, the definitions given in ISO2395 apply. 4 Designation The perforation of a plate is designated by shape of the holes; aperture size w, or aperture sizes w 1and w 2in case of slots; mutual arrange
20、ments of holes; pitch p, or pitches p 1and p 2in cases where the pitches are different in directions parallel to the edges of the plate; orientation of the arrangement of the perforations relative to the edges of the plate. The codification expresses the items of designation by symbols and magnitude
21、s in the sequence used above. NOTE 1Examples are given in Figure 1 to Figure 20 of each type of designation. To ensure easy readability of codifications, it is essential to separate clearly codifications for hole and codifications for pitch, and to state codification magnitudes which are combined wi
22、th “x” without spacing between. (SeeFigure 7 to Figure 14 and Figure 17 to Figure 20.) NOTE 2The purchaser should specify the size, thickness and material of the perforated plate for his purpose in addition to the codification. 5 Codification 5.1 Shape of holes The shape of holes shall be designated
23、 by the following symbols: R: circular (round) C: square, with sides parallel to the edges of the plate CD: square, with diagonals parallel to the edges of the plate H: hexagonal LR: slots with round ends LC: slots with square ends 5.2 Aperture size Following the symbol for shape of hole, the apertu
24、re size shall be stated in millimetres. The width of a slot, w 1 , combined with its length, w 2 , by the sign shall be stated in that order. 5.3 Arrangement of holes Following aperture size, the appropriate symbol for the arrangement of holes shall be stated, as follows: 5.3.1 An arrangement of hol
25、es with their midpoints at the vertices of rectangles shall be coded U (seeFigure 3). 5.3.2 An arrangement of holes with their midpoints at the vertices of rectangles and at the intersection of their diagonals shall be coded Z (seeFigure 4). 5.3.3 An arrangement of holes with their midpoints at the
26、vertices of squares and at the intersection of their diagonals may be coded M (seeFigure 5). 5.3.4 An arrangement of holes with their midpoints at the vertices of equilateral triangles shall be coded T (seeFigure 6). Figure 1 Code for shape of holesBS6511:1984 2 BSI 12-1999 5.4 Pitch Following the s
27、ymbol for arrangement of holes, their pitch or pitches shall be stated in millimetres. 5.4.1 For shapes R, C, CD or H in U- or Z-arrangements, both pitches shall be stated, the shorter one, p 1 , first, and combined by the sign (seeFigure 7 and Figure 8). In the case of a U-arrangement, when p 1 = p
28、 2 , only p shall be stated (see Figure 11). 5.4.2 For shapes LR or LC (slots) in U- or Z-arrangements, the pitch parallel to the width of the slots, p 1 , shall be stated first (seeFigure 9 and Figure 10). In the case of a U-arrangement, when p 1 = p 2 , only p shall be stated (seeFigure 12). 5.4.3
29、 For M- or T-arrangements, only p shall be stated (see Figure 13 and Figure 14). 5.5 Orientation of the perforation on the plate There are operating conditions in which the orientation of the perforations with the edges of the plate affects the performance as an industrial screen. Choice of orientat
30、ion is stated as Orientation1 or Orientation2 as follows: 5.5.1 With the T-arrangement, Orientation1 shall be with pitch p parallel to the longer edge (seeFigure 15); Orientation2 with p parallel to the shorter edge (seeFigure 16). 5.5.2 With shapes R, C, CD and H in U- and Z-arrangements, Orientati
31、on1 shall be with the shorter pitch p 1parallel to the longer edge (seeFigure 17); Orientation2 shall be with the shorter pitch parallel to the shorter edge (seeFigure 18). 5.5.3 With shapes LR and LC (slots) in U- or Z-arrangements, Orientation1 shall be with the width w 1parallel to the longer edg
32、e (seeFigure 19); Orientation2 shall be with the width parallel to the shorter edge (seeFigure 20). Figure 2 Examples of coded shape of hole and aperture size Figure 3 U-arrangement Figure 4 Z-arrangementBS6511:1984 BSI 12-1999 3 Figure 5 M-arrangement Figure 6 T-arrangement Figure 7 Example R10 U15
33、 20 Figure 8 Example C5 Z10 20 a a See national foreword for details of textual error. Figure 9 Example LR3 10 U12 18BS6511:1984 4 BSI 12-1999 Figure 10 Example LC3 10 Z18 12 Figure 11 Example C10 U20 Figure 12 Example LC10 15 U20 Figure 13 Example CD8 M12,5 Figure 14 Example H10 T16BS6511:1984 BSI
34、12-1999 5 Figure 15 T-arrangement, Orientation1 Figure 16 T-arrangement, Orientation2BS6511:1984 6 BSI 12-1999 Figure 17 Example C5 Z10 18 Orientation1 Figure 18 Example C5 Z10 18 Orientation2BS6511:1984 BSI 12-1999 7 Figure 19 Example LR3 18 Z12 36 Orientation1 Figure 20 Example LR3 18 Z12 36 Orien
35、tation28 blankBS6511:1984 BSI 12-1999 Publication referred to Seenational foreword.BS6511:1984 ISO7806:1983 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
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