1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Technical product documentation Simplified representation of pipelinesPart 2: Isometric projection (ISO 6412-2:2017)BS EN ISO 6412-2:2018National forewordThis British Standard is the UK implementation of EN ISO 64122:20
2、18. It is identical to ISO 64122:2017. It supersedes BS EN ISO 64122:1995, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee TDW/4, Technical Product Realization.A list of organizations represented on this committee can be obtained on request to its secr
3、etary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 97861 6ICS 23.040.01; 01.100.20; 01.100.99Compliance with a B
4、ritish Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 64122:2018EUROPEAN STANDARD
5、NORME EUROPENNEEUROPISCHE NORMEN ISO 64122February 2018ICS 01.100.99; 23.040.01 Supersedes EN ISO 64122:1994EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCENCENELEC Management Centre: Avenue Marnix 17, B1000 Brussels 2018 CEN Ref. No. EN ISO 64122:
6、2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersTechnical product documentation Simplified representation of pipelines Part 2: Isometric projection (ISO 64122:2017)Documentation technique de produits Reprsentation simplifie des tuyaux et lign
7、es de tuyauteries Partie 2: Projection isomtrique (ISO 64122:2017)This European Standard was approved by CEN on 22 October 2017.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
8、 without any alteration. Uptodate lists and bibliographical references concerning such national standards may be obtained on application to the CENCENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other
9、 language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, De
10、nmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English V
11、ersionEN ISO 64122:2018 (E)European forewordThis document (EN ISO 64122:2018) has been prepared by Technical Committee ISO/TC 10“Process plant documentation”.This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the
12、latest by August 2018, and conflicting national standards shall be withdrawn at the latest by August 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rig
13、hts.This document supersedes EN ISO 64122:1994.According to the CENCENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Form
14、er Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO
15、64122:2017 has been approved by CEN as EN ISO 64122:2018 without any modification.2BS EN ISO 64122:2018ISO 64122:2017Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Coordinates 15 Line conventions . 26 Deviations from the direction of coordinate axes 26.1 Gen
16、eral . 26.2 Pipes in a vertical plane . 26.3 Pipes in a horizontal plane . 26.4 Pipes not parallel to any coordinate plane 36.5 Auxiliary projection planes 37 Dimensioning and special rules . 47.1 General . 47.2 Diameters and wall thickness 47.3 Longitudinal and angular dimensions 47.4 Pipes with be
17、nds . 47.5 Radii and angles of bends 47.6 Levels . 57.7 Direction of slope 57.8 Positions of ends of pipes 67.9 Redundant dimensioning . 67.10 Dimensioning for pipe-bending machines 68 Graphical symbols . 68.1 General . 68.2 Examples of graphical symbols drawn with the isometric projection method .
18、78.2.1 Valves . 78.2.2 Transition pieces (cones) . 78.2.3 Supports and hangers 88.2.4 Crossings . 88.2.5 Permanent junctions 88.2.6 General connections 88.2.7 Flanges 99 Examples . 9Bibliography .12 ISO 2017 All rights reserved iiiContents PageBS EN ISO 64122:2018ISO 64122:2017ForewordISO (the Inter
19、national Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has
20、been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical st
21、andardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accor
22、dance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details
23、 of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endor
24、sement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
25、URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 10, Technical drawings, Subcommittee SC 10, Process plant documentation.This second edition cancels and replaces the first edition (ISO 64122:1989), which has been technically revised.The main changes compare
26、d to the previous edition are as follows: the normative references were updated; the document underwent editorial reision.A list of all parts in the ISO 6412 series can be found on the ISO website.iv ISO 2017 All rights reservedBS EN ISO 64122:2018ISO 64122:2017IntroductionFor drawings for tender, m
27、anufacturing drawings and erection drawings in pipeline construction as well as in machine construction and the construction industry, isometric projection has been introduced to a great extent, since the drawing work can be cut down and the presentation made clearer.For the purposes of this documen
28、t, all 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) lettering without altering the meaning of the indications.For the presentation of lettering (prop
29、ortions and dimensions), see ISO 64121. ISO 2017 All rights reserved vBS EN ISO 64122:2018This page deliberately left blankTechnical product documentation Simplified representation of pipelines Part 2: Isometric projection (ISO 6412-2:2017)1 ScopeThis document specifies supplementary rules, in addit
30、ion to the general rules given in ISO 64121, applicable to isometric representation. Isometric representation is used where it is necessary to show the essential features clearly in three dimensions.2 Normative referencesThe following documents are referred to in the text in such a way that some or
31、all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 12820, Technical drawings General principles of presentationISO 1291, Tec
32、hnical drawings Indication of dimensions and tolerances Part 1: General principlesISO 35451, Steel tubes and fittings Symbols for use in specifications Part 1: Tubes and tubular accessories with circular cross-sectionISO 5261, Technical drawings Simplified representation of bars and profile sections
33、ISO 64121, Technical drawings Simplified representation of pipelines Part 1: General rules and orthogonal representation3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 64121 apply.ISO and IEC maintain terminological databases for use in standardizatio
34、n at the following addresses: IEC Electropedia: available at http:/www.elect ropedia.org/ ISO Online browsing platform: available at https:/www .iso.org/obp4 CoordinatesAs far as it is necessary to use Cartesian coordinates, for instance for calculations or numerical control of machine tools, the co
35、ordinate axes shall comply with Figure 1.In all cases, the coordinates of individual pipes or pipe assemblies shall comply with those adopted for the complete installation and shall be indicated on the drawing or in an associated document.INTERNATIONAL STANDARD ISO 6412-2:2017 ISO 2017 All rights re
36、served 1BS EN ISO 64122:2018ISO 6412-2:2017Figure 15 Line conventionsSee ISO 64121:2017, 4.4.2.6 Deviations from the direction of coordinate axes6.1 GeneralPipes, or parts of pipes, running parallel to the coordinate axes, shall be drawn parallel to the relevant axis without any further indication.D
37、eviations from the directions of the coordinate axes shall be indicated by means of auxiliary hatched projection planes as shown in Figure 2.Figure 26.2 Pipes in a vertical planePipes, or parts of pipes, situated in a vertical plane, shall be indicated by showing their projections on a horizontal pl
38、ane see Figure 3 a).6.3 Pipes in a horizontal planePipes, or parts of pipes, situated in a horizontal plane, shall be indicated by showing their projections on a vertical plane see Figure 3 b).2 ISO 2017 All rights reservedBS EN ISO 64122:2018ISO 6412-2:20176.4 Pipes not parallel to any coordinate p
39、lanePipes, or parts of pipes, not running parallel to any coordinate plane, shall be indicated by showing both their projections on a horizontal and on a vertical plane see Figure 3 c).Figure 36.5 Auxiliary projection planesIt is recommended that the right angles of the triangles limiting the auxili
40、ary projection planes be indicated.Auxiliary projection planes may be emphasized by hatchings, parallel to the X or Yaxis for horizontal auxiliary planes, and vertical for all other auxiliary planes.If such hatching is not convenient it may be omitted, but in that case the rectangle (see Figure 4) o
41、r the rectangular prism (see Figure 5), of which a diagonal coincides with the pipe, shall be shown, using continuous narrow lines (type 01, ISO 12820).Figure 4 Figure 5 ISO 2017 All rights reserved 3BS EN ISO 64122:2018ISO 6412-2:20177 Dimensioning and special rules7.1 GeneralDrawings shall be dime
42、nsioned in accordance with ISO 1291. There are, however, special rules for isometric projection for pipelines which are specified in 7.2 to 7.10.7.2 Diameters and wall thicknessThe outer diameter (d) and the wall thickness (t) of pipes shall be indicated in accordance with ISO 5261 (see Figure 6). N
43、ominal dimensions may be indicated in accordance with ISO 35451 using the short designation “DN” (see ISO 64121:2017, Figure 1).7.3 Longitudinal and angular dimensionsLongitudinal and angular dimensions shall be indicated in accordance with ISO 1291; the length shall start from the outer faces of th
44、e pipe ends, flanges, or centre of the joint, whenever appropriate.7.4 Pipes with bendsPipes with bends shall be dimensioned from central line to central line or from the central line to the end of the pipe (see Figure 6).Figure 67.5 Radii and angles of bendsRadii and angles of bends may be indicate
45、d as shown in Figure 7.The functional angle shall be indicated.Bends may be simplified by extending the straight length of the flow line to the vertex. However, the actual bends in the pipes may be shown for the sake of clarity. In this case, if projections of bends would otherwise have been ellipti
46、cal, these projections may be simplified by drafting circular arcs.4 ISO 2017 All rights reservedBS EN ISO 64122:2018ISO 6412-2:2017Figure 77.6 LevelsLevels shall be indicated in accordance with ISO 1291 and ISO 64121 as shown in Figure 8.The horizontal part of the leader line shall follow the direc
47、tion of the associated flow line.Figure 87.7 Direction of slopeThe direction of slope shall be indicated by a rightangled triangle above the flow line, pointing from the higher down to the lower level, without changing the isometric direction of the flow line.The amount of slope shall be indicated i
48、n accordance with the method shown in Figure 9 and in ISO 64121.It can, however, be useful to specify the slope be referring to a datum level (see Figure 9).Figure 9 ISO 2017 All rights reserved 5BS EN ISO 64122:2018ISO 6412-2:20177.8 Positions of ends of pipesIf necessary, the positions of the ends
49、 of the piping may be specified by indicating the coordinates referring to the centres of the end faces.In the case of adjacent drawings, a reference should be given. For example, “continued on drawing x”.7.9 Redundant dimensioningIf necessary, the auxiliary hatched projection planes can be dimensioned (see Figure 10).If it is necessary for manufacturing and/or technical reasons to indicate double dimensioning, one of the dimensions should be indicated in parent
