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1、BRITISH STANDARD BS EN ISO 128-20:2001 Incorporating Amendment No. 1 to BS ISO 128-20:1996 (renumbers the BS ISO as BS EN ISO 128-20:2001) Technical drawings General principles of presentation Part 20: Basic conventions for lines The European Standard EN ISO 128-20:2001 has the status of a British S
2、tandard ICS 01.100.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 128-20:2001 This British Standard, having been prepared under the direction of the Consume
3、r Products and Services Sector Committee, was published under the authority of the Standards Committee on 15 January 2001 BSI 24 April 2002 ISBN 0 580 36233 7 National foreword This British Standard is the official English language version of EN ISO 128-20:2001. It is identical with ISO 128-20:1996.
4、 The UK participation in its preparation was entrusted to Technical Committee TDW/4, Engineering drawing, metrology, precision measurement and all related documentation, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary
5、. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Ele
6、ctronic Catalogue. 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. aid enquirers to under
7、stand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cove
8、r, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii and iii, a blank page, pages 1 to 10, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since
9、publication Amd. No. DateComments 1352224 April 2002Implementation of the European Standard Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 128-20 October 2001 ICS 01.100.01 English ve
10、rsion Technical drawings - General principles of presentation - Part 20: Basic conventions for lines (ISO 128-20:1996) Dessins techniques - Principes gnraux de reprsentation - Partie 20: Conventions de base pour les traits (ISO 128- 20:1996) This European Standard was approved by CEN on 30 September
11、 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtain
12、ed on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centr
13、e has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN CO
14、MMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 128-20:2001 E Licensed Copy: s
15、heffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI I NESO -821:02( 1002E) 2 Foreword The text of the International Standard from Technical Committee ISO/TC 10 “Technical drawings, product definition and related documentation“ of the International Organization
16、for Standardization (ISO), the secretariat of which is held by CMC. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2002, and conflicting national standards shall be withdrawn at the latest
17、by April 2002. NOTE FROM CMC The foreword is susceptible to be amended on reception of the German language version. The confirmed or amended foreword, and when appropriate, the normative annex ZA for the references to international publications with their relevant European publications will be circu
18、lated with the German version. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxem
19、bourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. eciton tnemesrodnE Txet eht fo retnI ehtradnatS lanoitanOSI d -821sah 6991:02 rppa neebyb devo sa NEC ruE anaepo radnatSw diyna tuoht mfidoica.noit 2 egaP EN ISO 12820:2001 Licensed Copy: sheffieldun sheffieldun
20、, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD IS0 128-20 First edition 1996-11-15 Technical drawings - General principles of presentation - Part 20: Basic conventions for lines Dessins techniques - Principes g figure 2 b): a continuous and a dashed space
21、d line. a) b) Figure 2 b) Arranged next to each other. See figure3 for an example (two continuous lines either side of two dashed spaced lines). Figure 3 3.3.3 Arrangement of two continuous lines parallel to each other with regularly recurring connecting elements between them See figure4a) and b) fo
22、r examples figure 4 a): blackened circular elements; figure 4 b): blackened trapezoidal elements. a) b) Figure 4 4 1002:02821 OSI NE 4 EN ISO 12820:2001 4 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 0 0SI 0SI )E(6991:02=821 3.3.4 Arrange
23、ment of regularly recurring geometric pictorial elements in association with continuous lines a) Without interruption of a continuous line. See figure 5 for examples. A I A I A A A A A I I I I I Figure 5 b) With interruption of a continuous line. See figure6 for examples. Figure 6 4 Line dimensions
24、4.1 Line width The width, d, of all types of lines shall be one of the following depending on the type and size of the drawing. This series is based on a common ratio 1: II- 2 (z 1:1,4): 0,13 mm; 0,18 mm; 0,25 mm; 0,35 mm; 0,5 mm; 0,7 mm; 1 mm; I,4 mm; 2 mm The widths of extra wide, wide and narrow
25、lines are in the ratio 4:2:1. The line width of any one line shall be constant throughout the whole line. 4.2 Deviation in line width Line widths may deviate from those specified in 4.1 providing that it is possible to differentiate unambiguously between two adjacent lines with different widths. If
26、drawing equipment which produces constant line width is used, the deviation in line width between two such lines shall not be greater than + 0,l d. - 1002:02821 OSI NE 5 EN ISO 12820:2001 5 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 0SI
27、 )E(6991:02=821 4.3 Configuration of lines For the preparation of drawings by hand the lengths of line elements should conform to those of table3. Table 3 - Line element Line type No. Length Dots 04 to 07 and 10 to 15 0,5d Gaps 02 and 04 to 15 3d Short dashes 08 and 09 6d Dashes 02, 03 and 10 to 15
28、12d Long dashes 04 to 06, 08 and 09 24d Spaces 03 18d NOTE - The lengths shown in this table are valid for line elements with semi- circular and squared ends. In the case of line elements with semicircular ends, the length of the line element corresponds to the distance covered by a technical pen (w
29、ith a tubular tip and using India ink) from the origin up to the end of the line element. The total length of such a line element is the sum of the length shown in table3 plus d. Formulae for the calculation of some of the basic types of line and line elements are given in IS0 128-21. The formulae a
30、re intended to facilitate the preparation of drawings using computer-aided design (CAD) systems. 5 Draughting of lines 5.1 Spacing The minimum space between parallel lines should not be less than 0,7 mm, unless rules to the contrary are stated in other International Standards. NOTE 4 In certain case
31、s when computer-aided drawing techniques are used, the spacing of lines on the drawing does not represent the actual spacing, e.g. for the representation of screw threads. This fact has to be considered when data sets are established, e.g. for the operation of machine tools. 1002:02821 OSI NE 6 EN I
32、SO 12820:2001 6 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 0 0SI 0SI )E(6991:02=821 5.2 Junctions 5.2.1 Types The basic types of lines, Nos. 02 to 06 and Nos. 08 to 15 should preferably meet at a dash; see figures 7 to 12. Figure 7 I I
33、I - -I- - Figure 9 Figure 11 Figure 8 / H+ I I Figure 10 Figure 12 1002:02821 OSI NE 7 EN ISO 12820:2001 7 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 128=20:1996(E) 0 0SI Lines of basic type No. 07 should preferably meet at a dot, s
34、ee figure 13. . . . . . . . . . . . l . . . . Figure 13 5.2.2 Representation The requirement of 5.2.1 shall be fulfilled by starting the lines at the junction (see figure 14) or by using a complete, or partial, cross formed by dashes (see figures 15 and 16). 12d Figure 15 Figure 14 Figure 16 8 1002:
35、02821 OSI NE 8 EN ISO 12820:2001 8 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 0 0SI IS0 128=20:1996(E) 5.3 Location of a second line Two different ways of draughting two parallel lines are shown in figure 17 a) and b). The preferred ver
36、sion is shown in figure 17a) (the second line is drawn below or to the right of the first line). r mm-. I I ! ! m-m. I a) b) Figure 17 6 Colours Lines shall be drawn in black or white depending on the colour of the background. Other standardized colours may also be used for drawing standardized line
37、s. In this case, the meaning of the colours shall be explained. 7 Designation The designation of the basic types of lines shall comprise the following elements in the order given: a) ” Line”; b) reference to this part of IS0 128; c) the number of the basic type in accordance with table 1; d) the lin
38、e width in accordance with 4.1; e) the colour (if applicable). EXAMPLES Designation of a line of type No. 03 (03), line width 0,25 mm (0,25): Line IS0 128-20 - 03 x 0,25 Designation of a line of type No. 05 (05), line width 0,13 mm (0,13) and white in colour: Line IS0 128-20 - 05 x 0,13 / white EN I
39、SO 12820:2001 9 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 0SI )E(6991:02=821 CII PI PI VI Annex A (informative) Bibliography IS0 128-21 :I 9961, Technical drawings - Gen- era/ principles of presentation - Part 2 7: Prep- aration of lin
40、es by CAD systems. iI51 IS0 1219-I :1991, Fluid power systems and components - Graphic symbols and circuit dia- grams - Part I: Graphic symbols. IS0 351 l-l :I 977, Process measurement control functions and instrumentation - Symbolic rep- resen ta tion - Part 7: Basic requirements. I31 I71 IS0 351 I
41、 -2:1984, Process measurement control functions and instrumentation - Symbolic rep- resen ta tion - Part 2: Extension of basic re- quiremen ts. t-81 t-91 IS0 351 l-3:1 984, Process measurement control functions and instrumentation - Symbolic rep- resen ta tion - Part 3: Detailed symbols for in- stru
42、ment interconnection diagrams. IS0 351 l-4: I 985, Industrial process measure- men t control functions and instrumentation - Symbolic representation - Part 4: Basic sym- bols for process computer, interface, and shared display/control functions. IS0 5455:1979, Technical drawings - Scales. IS0 6428:1
43、982, Technical drawings - Require- men ts for microcopying. IS0 10628-I :I 9961, Flow diagrams for process b/ants - Part I: General rules. 1) To be published. 10 EN ISO 12820:2001 10 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Lice
44、nsed Copy: sheffieldun sheffieldun, na, Wed Nov 15 05:18:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 128-20:2001 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK
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