1、DEUTSCHE NORM November 1996 DIN General tolerances for welded constructions Tolerances for lengths, angles, shape and position (IS0 13920:1996) English version of DIN EN IS0 13920 EN IS0 13920 This standard incorporates the English version of Is0 13920. ICs 25.1 60.00 Descriptors: Tolerances, weldin
2、g. Schweien - Ailgemeintoleranzen fr Schweikonstruktionen - Lngen und Winkelmae, Form und Lage (IS0 13920 : 1996) Supersedes DIN 8570-1 and DIN 8570-3, October 1987 editions. European Standard EN IS0 13920: 1996 has the status of a DIN Standard. A comma is used as the decimal marker. National forewo
3、rd This standard has been published in accordance with a decision taken by CENTTC 121 to adopt, without alteration, International Standard IS0 13920 as a European Standard. The responsible German body involved in its preparation was the Normenausschu Schweitechnik (Welding Standards Committee). The
4、DIN Standards corresponding to the InternationaVEuropean Standards referred to in clause 2 of the EN are as follows: IS0 3599 IS0 6906 IS0 8015 ISO/DIS 463 prEN IS0 1101 E DIN EN 13385 E DIN EN 13385 E DIN IS0 8015 E DIN EN IS0 463 E DIN IS0 1101 Amendments DIN 8570-1 and DIN 8570-3, October 1987 ed
5、itions, have been superseded by the specifications of EN IS0 13920, which is identical to IS0 13920. Tolerance class Z has been dropped. Previous editions DIN 8570-1: 1971-04, 1974-10, 1987-10; DIN 8570-3: 1974-10, 1987-10; DIN 25029: 1962-04. Standards referred to (and not included in Normative ref
6、erences) E DIN EN 13385 Geometrical Product Specifications (GPS) - Dimensional measuring instruments - Vernier callipers - Design and metrological requirements Geometrical Product Specifications (GPS) - Dimensional measuring instruments - Dial gauges - Design and metro- logical requirements E DIN EN
7、 IS0 463 EN compris s 5 pages. 0 Na pari of this standard may be reproduced without the prior permission of DIN Deutsches Instltut fur Normung e.V., Berlin. Eeuth Verlag GmbH, Berlin, has the exclusive right of sale for German Standards (DIN-Normen) Ref. No. DIN EN IS0 13920: 1996- 11 Price group 07
8、 Sales No. 1107 07.97 COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesCOPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesEUROPEAN STAN DAR D NORME EUROPENNE EUROPISCHE NORM EN IS0 13920 August 1996 ICs
9、 25.1 60.00 Descriptors: Tolerances, welding. English version Welding Dimensions for lengths, angles, shape and position (IS0 13920 : 1996) General tolerances for welded constructions Soudage - Tolrances gnrales relatives aux constructions soudes - Dimensions des longeurs et angles, formes et posi-
10、tions (IS0 13920:1996) Schweien - Allgemeintoleranzen fr Schweikonstruktionen - Lngen und Winkelmae, Form und Lage (IS0 13920 : 1996) This European Standard was approved by CENon 1995-06-20 and is identical to the IS0 Standard as referred to. CEN members are bound to comply with the CENKENELEC Inter
11、nal 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
12、. 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 Central Secretariat has the same status as the official versions. CEN members a
13、re the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Por- tugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europis
14、ches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1996. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN IS0 13920 : 1996 E COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Inf
15、ormation Handling ServicesPage 2 EN IS0 13920 : 1996 Contents Foreword . 2 5 Indications on drawings . 3 1 Scope . 2 6.1 General 4 3 Definitions . 2 6.2 Straightness 4 4 General tolerances . 2 6.3 Flatness 4 4.1 Tolerances for linear dimensions . 2 6.4 Parallelism 4 4.2 Tolerances for angular dimens
16、ions . 3 4.3 Straightness, flatness and parallelism tolerances. . 3 7 Non-conformity 4 Page Page 2 Normative refer ences, . 2 Testing . Foreword This European Standard has been prepared by Technical Committee CEN/TC 121 Welding, the Secretariat of which is held by DS, in collaboration with Technical
17、 Committee ISOTTC 44 Welding and allied processes. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by February 1997 at the latest. In accordance with the CENKENELEC In
18、ternal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the Unit
19、ed Kingdom. 1 Scope This European Standard specifies general tolerances for linear and angular dimensions and for shape and position of welded structures in four tolerance classes, these being based on customary workshop accuracy. The main crite- rion for the selection of a particular tolerance clas
20、s should be the functional requirements which are to be met. The applicable tolerances are always those which are stated in the drawing. Instead of specifying individual tol- erances, the tolerance classes according to this standard may be used. General tolerances for linear and angular dimensions a
21、nd for shape and position as specified in this standard apply for weldments, welding assemblies and welded structures etc. Special provisions may be necessary for complex struc- tures. The specifications given in this standard are based on the principle of independency as specified in ISO8015, ac- c
22、ording to which the dimensional and geometrical toler- ances apply independently of each other. Manufacturing documentation in which linear and angular dimensions or indications for shape and position are pre- sented without individually indicated tolerances shall be deemed incomplete if there is no
23、, or inadequate, reference to general tolerances. This does not apply to temporary dimensions. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These nor- mative references are cited at the appropriate place in the text an
24、d the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For un- dated references, the last edition of the publication referred to applies.
25、prEN IS0 1101 Technical drawings - Geometrical tolerancing - Toler- ances of form, orientation, location and run-out - Gen- eralities, definitions, symbols, indications on drawings Geometrical Product Specifications (GPS) - Dimen- sional measuring instruments - Dial gauges: design and metrological r
26、equirements Vernier callipers reading to 0,l and 0.05 mm Vernier callipers reading to 0,02 mm Technical drawings - Fundamental tolerancing princi- ISO/DIS 463 IS0 3599: 1976 IS0 6906 : 1984 IS0 801 5: 1985 ple 3 Definitions For the purposes of this standard, the definitions given in prEN IS0 11 O1 a
27、pply. 4 General tolerances 4.1 Tolerances for linear dimensions See table 1. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 3 EN IS0 13920 : 1996 2 to 30 Table 1: Tolerances for linear dimensions Over Over Over Over Over Over Over Over Over Ov
28、er 30 120 400 1000 2000 4000 8000 12000 16000 20000 up to up to up to up to up to up to up to up to up to 120 400 1000 2000 4000 8000 12000 16000 20000 Tolerance class I1 12 13 f4 Range of nominal sizes, I, in mm I I1 I2 f3 f4 f5 I6 f7 I8 f9 12 f3 f 4 f 6 f 8 f10 f12 I14 f16 14 f6 f 8 fll f14 f18 f2
29、1 I24 f27 f7 I9 f12 f16 f21 I27 f32 I36 f40 B C f1 I13 f9 f6 f18 f 13 f9 4.2 Tolerances for angular dimensions The length of the shorter angle leg shall be used to deter- mine, on the basis of table 2, which tolerances are to apply. The length of the leg may also be assumed to extend to a specified
30、reference point. In this case, the reference point concerned shall be indicated on the drawing. See table 2 for the relevant tolerances. Figures 1 to 5 show examples of how the shorter angle leg, I, is to be represented. 4.3 Straightness, flatness and parallelism The straightness, flatness and paral
31、lelism tolerances as specified in the table 3 apply both for the overall dimen- sions of a weldment, a welding assembly, or a welded structure, and also for sections for which the dimensions are indicated. Other tolerances of form and position (e.g. coaxiality and symmetry tolerances) have not been
32、specified. If such tol- erances are required for functional reasons, they shall be indicated on the drawings, as specified in prEN IS0 1101. tolerances 5 Indications on drawings The designation of the selected tolerance class as speci- fied in tables 1 and 2 (e.g. EN IS0 13920-B) or its combina- tio
33、n with a tolerance class as specified in table 3 (e.g. EN IS0 13920-BE), shall be entered in the appropriate area on the drawing. Table 2: Tolerances for angular dimensions I Range of nominal sizes, 1, in mm (length or shorter leg) I Tolerance I Up to 400 I Over 400 I Over 1000 I class up to 1 O00 I
34、 Tolerances, Aw, (in degrees and minutes) I C I Ilo I f45 I f30 I Calculated and rounded tolerances, t, in mm/ml) D I I26 I f22 I f18 I ) The value indicated in mm/m corresponds to the tan- gent value of the general tolerance. It is to be multi- plied by the length, in m, of the shorter leg. Referen
35、ce point Reference point Reference point Figure 1 Figure 2 Figure 3 COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 4 EN IS0 13920 : 1996 Over 30 up to 120 Tolerance class Over Over Over Over Over Over Over Over Over 120 400 1000 2000 4000 8000
36、 12000 16000 20000 up to up to up to up to up to up to up to up to 400 1000 2000 4000 8000 12000 16000 20000 Reference point Figure 4 Figure 5 E F G H 03 1 13 2 3 4 5 6 7 8 1 13 3 495 6 8 10 12 14 16 13 3 5,5 9 11 16 20 22 25 25 23 5 9 14 18 26 32 36 40 40 6 Testing 6.1 General Testing and measuring
37、 devices used shall be suitable and accurate for their intended purpose. The following shall be used: - graduated steel straightedges; - tape measures; - straightedges; - squares; - vernier callipers (in accordance with IS0 3599 and IS0 6906). - dial gauges (in accordance with ISO/DIS 463). Other te
38、sting and measuring devices may be used by agreement. The results of measurement may be influenced if they are obtained under unusual temperature or atmospheric condi- tions (e.g. large constructions in strong sunlight). The actual size of an angle shall be determined by applying suitable measuring
39、devices tangentially to the weldment, but away from the zone immediately influenced by the weld. The deviation shall be derived from the difference between the nominal size and the actual size. The angular deviation may be measured in degrees and minutes, or in millimetres. 6.2 Straightness The edge
40、 of the weldment and the straightedge shall be aligned in such a way that the greatest distance between the straightedge and the actual surface is at its minimum. The distance between the edge and the straightedge shall be measured (for example, see figure 6). 6.3 Flatness The actual surface of the
41、weldment and the measuring plane shall be aligned to each other in such a way that the greatest distance between the measuring plane and the actual surface is at its minimum. This may be effected, for example, with the aid of optical devices, tubular water lev- els, span wires, floor plates, surface
42、 plates, and machine beds. The distances between the actual surface and the measur- ing plane shall be measured (for example, see figure 7). 6.4 Parallelism The reference surface shall be aligned parallel to the refer- ence plane. A measuring plane shall be established parallel to the ref- erence pl
43、ane and apart from the weldment, using the meas- uring devices referred to in 6.3. The distances between the actual surface and the measuring plane shall be measured (example see figure 8). 7 Non-conformity A decision on the acceptance of components not cornply- ing with this standard may be made on
44、 the basis of the suitability for their intended purpose. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 5 EN IS0 13920 : 1996 .- Straightedge Edge of weldment E c / I hmax - hmin 5 Figure 6: Straightness test Measuring plane Figure 7: Flatness test Detail x plane Measuring plane c I Actual surface Reference plane Figure 8: Parallelism test COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling Services
