1、CEN EN*ISO*b4L2- L 94 3404587 0305282 481 = BRITISH STANDARD Technical drawings - Simplified representation of pipelines Part 1. General rules and orthogonal representation The European Standard EN IS0 6412-1 : 1994 has the status of a British Standard BS EN IS0 BS 308 : Section 4.6 : 1995 6412-1 :
2、1995 CEN EN*ISO*b432- 3 qk 3404589 0305283 318 BS EN IS0 6412-1 : 1995 Amd. No. Date Committees responsible for this British Standard Text afected The preparation of this; British Standard was entrusted to Technical Committee TDW4, Engineering drawing practice, upon which the foliowing bodies were r
3、epresented Atomic Weapons Establishment British Gas plc British Standards Society Drawing Office Material Manufacturem and Dealers Association Electricity Association Gauge and Tool Makers Association HEYAC Association Institution of Chemical Engineerc Institution of Engineering Designers Power Gene
4、ration Conbractom Association Society of British Aerospace Companies Ltd. University of Warwick This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1995 O BSI 1
5、995 The following BSI references relate to the work on this standard. Committee reference TDW4 Draft announced in BSI Naos August 1995 ISBN O 580 23772 9 CEN EN*ISO*b4L2- L 94 3404589 01i05284 254 BS EN IS0 6412-1 : 1995 Contents Page Inside front cover Committees responsible National foreword u For
6、eword 2 Introduction Specification 1 Scope 2 Normative references 3 Denitions 4 General principles 3 4 4 4 4 5 Crossings and connections 8 6 Representation of equipment 8 7 Examples 10 A (jnformative) Bibliography 12 Annex 1 CEN EN*IS0*6412- L 94 m 3404589 0305285 390 m BS EN IS0 6412-1 : 1995 Natio
7、nal foreword This Part of BS EN 6412 has been prepared by Technical Committee TDEY4 and is the English language version of EN IS0 6412-1 : 1994 Technical drawings - Simplgied representation of pipelines -Part 1: Geneml neles and orthogonal representation, published by the European Committee for Stan
8、dardization (GEN). It is identical with IS0 6412-1 : 1989, published by the International Organization for Standardization This Part of BS EN IS0 6412 partially supersedes BS 308 : Part 4. It is envisaged that when the full range of European Standards on technical drawing is implemented BS 308 wi be
9、 withdrawn. Cross-references (?so- Publication referred to IS0 128 : 1982 IS0 129 : 1985 ISO406: 1987 IS0 1219 : 1976 IS0 30981 : 1974 IS0 4067-1 1984 IS0 5455 : 1979 IS0 6428 : 1982 Corresponding British Standard BS 308 Engiwering drawing practice Part 1 : 1993 Recom 23.040.90 Descriptors: Pipeline
10、s, drawings, technical drawings English version Technicd drawings - Simplified representation of pipelines - Part 1: General rules and orthogonal representation (IS0 6412-1 : 1989) Dessins techniques - Reprsentation simplifie des tuyaux et lignes des tuyauteries - Partie 1: Rgles gnrales et reprsent
11、ation orthogonale Darstellung Technische Zeichnungen - Vereinfachte Darstellung von Rohrleitungen - Teil 1: Allgemeine Regeln und orthogonale (IS0 6412-1 : 1989) (IS0 6412-1 : 1989) This European Standard was approved by CEN on 199410-14. CEN members are bound to comply with the CENKENELEC Internal
12、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 obtained on application to the Central Secretariat or to any CEN member. Th
13、is 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 Central Secretariat has the same status as the official versions. CEN members are t
14、he national standards bodies of Austria, Belgium, Denmark, Finland, Rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee
15、 fin Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1994 Copyright reserved to CEN members Ref. No. EN IS0 6412-1 : 1994 E CEN EN*ISO*b412- 1 74 3404587 0105287 Tb3 = Page 2 EN IS0 6412-1 : 1994 Foreword This European Standard was taken over by CEN from the work of ISOmC 10, Tech
16、nical drawings, product denition and related documentation, of the International Standards Organization (ISO). The Technical Board had decided to submit the 6nal draft for Formal Vote. The result was positive. This European Standard shall be given the status of a national standard, either by publica
17、tion of an identical text or by endorsement, at the latest by April 1995, and conflicting national standards shall be withdrawn at the latest by April 1995. According to the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard. Austria, Belgium, Denm
18、ark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. CEN EN*ISO*bLIL2- L 74 H 3404587 OL0528B 7TT Page 3 EN IS0 6412-1 : 1994 Introduction Depending on the information it is intended to convey and the f
19、orm of representation required, a distinction has to be made between graphical representation by means of orthogonal and that by means of isometric representation. This part of IS0 6412 deals, therefore, with general rules used for both representations (orthogonal and isometric). Rules applicable on
20、ly to isometric representation are given in IS0 6412-2. For the purpoces of this part of IS0 6412, ali dimensions and tolerances on the drawings have been stencilled in upright lettering. It should be understood that these indications could just as well be written in free-hand or inclined (italic) l
21、ettering without altering the meaning of the indications. For the presentation of lettering (proportions and dimensions), see 4.4. CEN EN*ISO*b4LZ- L 94 3404589 0105287 836 Page 4 EN IS0 6412-1 : 1994 Technical drawings - Simplified representation of pipelines - Part 1 : General rules and orthogonal
22、 representation 1 Scope This part of IS0 6412 specifies rules and conventions for the execution of simplified drawings for the representation of all kinds of pipes and pipelines made of all sorts of materials (rigid and flexible). It shall be used whenever pipes or pipelines have to be represented i
23、n a simplified manner. For the purposes of this part of IS0 6412, the figures illustrate the text only and should not be considered as design examples. NOTE - This part of IS0 6412 might also be of some use for the representation of similar installations, such as ventilation or air- conditioning sys
24、tems; in such cases, the term “duct“, etc. should be substituted for the term “pipe“. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 6412. At the time of publication, the editions indicated were valid
25、. All standards are subject to revision, and parties to agreements based on this part of IS0 6412 are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and IS0 main- tain registers of currently valid International Standards.
26、IS0 128 : 1982, Technical drawings - General principles of presentation. IS0 129 : 1985, Technical drawings - Dimensioning - General principles, definitions, methods of execution and specialindc8- tions. IS0 406 : 1987. Technical drawings - Tolerancing of linear and angular dimnsions. IS0 1219 : 197
27、6, Fluid power systems and components - Graphic symbols. IS0 398-1 : 1974, Technical drawings - Lettering - Part I: Current 1982, Technical drawings - Requirements for microcopying. IS0 7573 : 1983, Technical drawings - Item lists. 3 Definitions For the purposes of IS0 6412, the following definition
28、s apply. 3.1 orthogonal representation : Projection method in which the projectors are at right angles to the projection plane. 3.2 isometric representation : Projection method in which each of the three coordinate axes is inclined at the same angle to the projection plane. 3.3 flow line: Representa
29、tion of the flow path of the inlet or outlet streams or of material, energy or energy carriers. 4 General principles In this clause all general principles are specified which are com- mon to the methods of projection and to the pictorial represen- tations, as recommended in this part of IS0 6412. CE
30、N EN*ISO*b4L2- L 74 II 3404589 0105270 558 G - - - - Chain thin I 4.1 Representation of pipes, etc. G1 Centreiines The flow line representing a pipe, etc. (irrespective of its diameter), shall be a single continuous thick line (type A, see table 1 and IS0 1281, coinciding with the central line of th
31、e pipe (see IC0 4067-1). Bends may be simplified by extending the straight length of the flow line to the vertex (see figure 1). However, bends may be shown for sake of clarity in the form illustrated in figure 2. In this case, if projections of bends would otherwise have been elliptical, these proj
32、ections may be simplified by drawing cir- cular arcs (see figure 3). 4.2 Scale If the drawing is to scale, this shall be indicated in accordance with IS0 54%. Page 5 EN IS0 6412-1 : 1994 4.3 Lines 4.3.1 Thickness of lines In general, only one thickness of line shall be used. However, in cases where
33、more than one line thickness has to be used, the line thicknesses shall be chosen from IS0 128; the relative pro- portions of line thicknesses a:b:c shall be2:fl:l. Different line ttiicknesses shall then be used as follows (see also 4.3.2) : - line thickness a: main flow lines; - line thickness b: s
34、econdary flow lines, lettering; - line thickness c: leader lines, dimension lines, etc. 4.3.2 Types of line Table 1 The types and thicknesses of line shown in table 1 shall be used. Description Application Line type in accordance with with IS0 128 Continuous thick I A I AleFlow lines and connected I
35、 _ _._ -I 1 81 Hatching Continuous thin B 84 Isometric grid lines -_- _ Continuous thin freehand I Cl/Dl Limits of partial or c- _ _ interrupted views and -nv-F Continuous thin with zigzags 1 sections E - - - - Dashed thick I El Flow lines specified on other drawing I I F1 Floor F2 Walls F3 Ceilings
36、 _ E J - - - Extra thick chain line” Wi Contract boundary *-:-:TI Chain thin double-dashed the cutting plane _-_ - _I_._ K1 Outlines of adjacent parts K2 Parts situated in front of 1) Four times the thickness of line type G. CEN EN*ISO*b432- 1 94 3404589 0305293 494 Page 6 EN IS0 6412-1 : 1994 4.3.3
37、 Spacing of lines In accordance with IS0 6428, the space between parallel lines (including hatching) shall not be les than Mce the thickness of the heaviest of these lines, with a minimum spacing of 0.7 mm. The minimum spacing between adjacent flow lines and be- tween flow lines and other lines shou
38、ld be 10 mm. 4.4 Lettering Lettering shall be in accordance with IS0 30981; lettering type B vertical is preferred. The line thickness of the lettering shall be the same as the line thickness of those tpd-symbols to which the lettering is close or associated (see IS0 3461-2). 4.5 Dimensioning 4.5.1
39、In general, dimensioning shall be in accordance with IS0 129. Nominal dimensions may be indicated in accordance with IS0 3545 using the short designation “DN“ (see figure 1). The outer diameter (4 and the wall thickness (I) of pipes may be indicated in accordance with IS0 5261 (see figure 2). If nec
40、essary, an item list (see IS0 7R3) giving additional informa- tion on the pipes, including the associated equipment, may be added to the drawing. Lengths shall start from the outer faces of the pipe ends, Ranges, or centre of the joint. whenever appropriate. 4.5.2 Pipes with bends should be generall
41、y dimensioned from central line to central line of the pipelines (see figures 1 and 2). If it is necessary to specify the dimension from the outside or in- side external protection or surface of the pipe, the dimension may be specified by arrows pointing to short thin strokes parallel to the project
42、ion line (see figure 3). The dimensions from outer to outer, from inner to inner and from inner to outer vertex are shown in figures 3a), 3b) and 3c), respectively. Figure 1 a) b) Figure 3 4.5.3 Radii and angles of bends may be indicated as shown in figure 4. The functional angle shalt be indicated;
43、 in general, angles of 9o are not indicated. 60,3 x 7,s w Figure 2 C) Figure 4 CEN EN*ISO*b412- L 94 0 3404587 0105292 320 h 3“ Page 7 EN IS0 6412-1 : 1994 7L3 200 4.5.4 Levels refer generally to the centre of the pipe and should be indicated in accordance with IS0 129 (see figure 5). If, in special
44、 cases, it is necessary to specify the level to the bottom of a pipe this shall be indicated by the reference arrow pointing to short thin strokes, as specified in 4.5.2 Isee figures 3 and see also IS0 4067-1); if, however, it is absolutely necessary to indicate that one pipe has to pass behind the
45、other, the flow line representing the hidden pipe shall be interrupted (see figure 10). The width of each intemp- tion shall not be less than five tim the thickness of the con- tinuous line (see figure 11). - see table 1 and IS0 128) as shown in figure 22. crosses at their centrelines. 7 Examples An
46、 example of orthogonal projection is given in figure 25. Figure 22 NOTE - Other examples are given in IS0 351 1-3 and IS0 3753. 1) It is envisaged to enlarge IS0 4067 to include all other graphical symbols used for piping systems. Page 11 EN IS0 6412-1 : 1994 t - 3 7 Reference Coordinates of the num
47、ber end points %= -20 Yg = 0 zg= +40 NOTE - Points at which the pipe changes direction and connections are indicated by reference numbers. The pipe and the reference numbers are identical to those in the isometric representation illustrated in IS0 6412-2 : 1989, figure 23. Reference numbers for poin
48、ts hidden behind other points are shown in brackets. Figure 25 CEN EN*ISO*b432- L 94 I 3404589 O305297 902 M Page 12 EN IS0 6412-1 1994 Annex A (informative) Bibliography IS0 841 : 1974, Numerical control of machines - Axis and motion nomenclature. IS0 1101 : 1983, Technical drawings - Geometrical t
49、oter- anung - Tolerancing of form, orientation, location and run- out - Generalities, definitions, s ymbols, indications on drawings. IS0 15w : 1977, Geometrical orientation and directions of movements. IS0 351 1-1 : 1977, Process measurement control functions and instrumentation - Symbolic representation - Part I: Bask requirements. IS0 351 1-3 : 1984, Process measurement control functions and instrumentation - Symbolic representation - Part 3: Detailed symbols for instrument interconnection diagmms. IS0 351 1-4 : 1985, ptocess measurement
