DIN EN 14399-2-2015 High-strength structural bolting assemblies for preloading - Part 2 Suitability for preloading German version EN 14399-2 2015《预加负荷用高强度结构螺栓组件 第2部分 预加负荷的适合性 德文版本E.pdf

1、April 2015 Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS

2、21.060.01!%B3O“2311644www.din.deDDIN EN 14399-2High-strength structural bolting assemblies for preloading Part 2: Suitability for preloading;English version EN 14399-2:2015,English translation of DIN EN 14399-2:2015-04Hochfeste vorspannbare Garnituren fr Schraubverbindungen im Metallbau Teil 2: Eign

3、ung zum Vorspannen;Englische Fassung EN 14399-2:2015,Englische bersetzung von DIN EN 14399-2:2015-04Boulonnerie de construction mtallique haute rsistance apte la prcontrainte Partie 2: Aptitude lemploi pour la mise en prcontrainte;Version anglaise EN 14399-2:2015,Traduction anglaise de DIN EN 14399-

4、2:2015-04SupersedesDIN EN 14399-2:2006-06www.beuth.deDocument comprises 21 pagesIn case of doubt, the German-language original shall be considered authoritative.04.15 DIN EN 14399-2:2015-04 2 A comma is used as the decimal marker. National foreword This document (EN 14399-2:2015) has been prepared b

5、y Technical Committee CEN/TC 185 “Fasteners” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the DIN-Normenausschuss Mechanische Verbindungselemente (DIN Standards Committee Fasteners), Working Committee NA 067-00-07 AA Verbindungselemente fr den Metallbau. E

6、N 14399-2 has been revised in connection with the publication of EN 14399-1 as a harmonized European Standard. The European Standards referred to in Clause 2 of this document have been published as the corresponding DIN EN or DIN EN ISO Standards with the same number. The DIN Standards corresponding

7、 to the International Standards referred to in this document are as follows: ISO 272 DIN ISO 272 Amendments This standard differs from DIN EN 14399-2:2006-06 as follows: a) the title of the German version has been changed: the word planmig has been deleted and Garnituren (assemblies) has been includ

8、ed; b) technical requirements and delivery conditions for bolting assemblies have been transferred from EN 14399-1; c) Table 1 containing the overview of the composition of structural bolting assemblies and component marking has been added; d) requirements for necessary information on the use of tig

9、htening methods to be stated on the label or packaging have been added; e) requirements for the test report have been revised; Previous editions DIN EN 14399-2: 2005-06, 2006-06 National Annex NA (informative) Bibliography DIN ISO 272, Fasteners Width across flats for hexagon products EUROPEAN STAND

10、ARD NORME EUROPENNE EUROPISCHE NORM EN 14399-2 February 2015 ICS 21.060.01 Supersedes EN 14399-2:2005English Version High-strength structural bolting assemblies for preloading -Part 2: Suitability for preloading Boulonnerie de construction mtallique haute rsistance apte la prcontrainte - Partie 2: A

11、ptitude lemploi pour la mise en prcontrainte Hochfeste vorspannbare Garnituren fr Schraubverbindungen im Metallbau - Teil 2: Eignung zum Vorspannen This European Standard was approved by CEN on 18 October 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate

12、 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 CEN-CENELEC Management Centre or to any CEN member. This European Stand

13、ard 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the nati

14、onal standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slo

15、vakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any mea

16、ns reserved worldwide for CEN national Members. Ref. No. EN 14399-2:2015 EEN 14399-2:2015 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Symbols and units .6 5 Technical requirements for structural bolting assemblies .7 5.1 Composition

17、of bolting assemblies .7 5.2 Manufacturing requirements 9 5.3 Marking of the components of the bolting assemblies .9 5.4 Delivery conditions for the bolting assemblies 9 5.5 Information to be supplied . 10 6 Suitability test . 10 6.1 Principle of the test. 10 6.2 Test apparatus 11 6.3 Test assemblie

18、s 11 6.4 Test set-up . 12 6.5 Test procedure 12 6.6 Evaluation of the test results . 13 6.6.1 Rotation/bolt force curve . 13 6.6.2 Torque/bolt force curve for the torque at the design preload 14 6.6.3 Elongation/bolt force curve . 15 6.6.4 Torque/bolt force curve for the individual values of the bol

19、t force at a specified value of the applied torque . 16 6.7 Test report . 16 Annex A (informative) Special testing conditions and procedures 18 Bibliography . 19 DIN EN 14399-2:2015-04 EN 14399-2:2015 (E) 3 Foreword This document (EN 14399-2:2015) has been prepared by Technical Committee CEN/TC 185

20、“Fasteners”, the secretariat of which is held by DIN. 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 August 2015 and conflicting national standards shall be withdrawn at the latest by November 20

21、16. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14399-2:2005. In comparison with EN 14399-2:2005, the

22、following modifications have been made: technical requirements and delivery conditions for bolting assemblies have been transferred from EN 14399-1; Table 1 containing the overview of the composition of bolting assemblies and component marking has been added; requirements for necessary information o

23、n the use of tightening methods to be stated on the label or packaging have been added; requirements for the test report have been revised. EN 14399 consists of the following parts, under the general title High-strength structural bolting assemblies for preloading: Part 1: General requirements; Part

24、 2: Suitability for preloading; Part 3: System HR Hexagon bolt and nut assemblies; Part 4: System HV Hexagon bolt and nut assemblies; Part 5: Plain washers; Part 6: Plain chamfered washers; Part 7: System HR Countersunk head bolt and nut assemblies; Part 8: System HV Hexagon fit bolt and nut assembl

25、ies; Part 9: System HR or HV Direct tension indicators for bolt and nut assemblies; Part 10: System HRC Bolt and nut assemblies with calibrated preload. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Euro

26、pean Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slo

27、venia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 14399-2:2015-04 EN 14399-2:2015 (E) 4 Introduction This document on structural bolting reflects the situation in Europe where two technical solutions exist to achieve the necessary ductility of bolt/nut/washer(s) assemblies. Th

28、ese solutions consist of two different systems (HR and HV) of bolt/nut/washer assemblies (see Table 1). Both systems are well proven and it is the responsibility of the experts using structural bolting whether they use the one or the other system. It is, however, important for the performance of the

29、 assembly to avoid mixing up the components of both systems. Therefore, bolts and nuts for both systems are standardized in one single part of this European Standard each and the marking of the components of the same system is uniform. Preloaded bolted assemblies are very sensitive to differences in

30、 manufacture and lubrication. Therefore, it is important that the bolting assemblies are supplied by one manufacturer who is always responsible for the functionality of the bolting assemblies. For the same reason it is important that coating of the bolting assemblies is under the control of one manu

31、facturer. Beside the mechanical properties of the components, the functionality of the bolting assemblies requires that the specified preload can be achieved if the bolting assemblies are tightened with a suitable procedure. For this purpose, a test method for the suitability of the bolting assembli

32、es for preloading was created, which will demonstrate whether the functionality of the bolting assemblies is fulfilled. It should be pointed out that compared to ISO 272 the widths across flats (large series) for M12 and M20 have been changed to 22 mm and 32 mm respectively. These changes are justif

33、ied by the following reasons. Under the specific conditions of structural bolting, the compressive stresses under the bolt head or nut for the sizes M12 may become too large with the width across flats of 21 mm, especially if the washer is fitted eccentrically to the bolt axis. For the size M20, the

34、 width across flats of 34 mm is very difficult to be produced. The change to 32 mm is primarily motivated by economics but it should also be pointed out that the width across flats of 32 mm was common practice in Europe. DIN EN 14399-2:2015-04 EN 14399-2:2015 (E) 5 1 Scope This European Standard spe

35、cifies the technical requirements for high-strength structural bolting assemblies in order to ensure the suitability for preloading of bolted connections in metallic structures. A suitability test is specified to check the behaviour of the structural bolting assemblies so as to ensure that the requi

36、red preload can be reliably obtained by the tightening methods specified in EN 1090-2 with sufficient margins against overtightening and against failure. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its app

37、lication. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1090-2, Execution of steel structures and aluminium structures - Part 2: Technical requirements for steel structures EN 14399-1

38、:2015, High-strength structural bolting assemblies for preloading - Part 1: General requirements EN 14399-3, High-strength structural bolting assemblies for preloading - Part 3: System HR - Hexagon bolt and nut assemblies EN 14399-4, High-strength structural bolting assemblies for preloading - Part

39、4: System HV - Hexagon bolt and nut assemblies EN 14399-5, High-strength structural bolting assemblies for preloading - Part 5: Plain washers EN 14399-6, High-strength structural bolting assemblies for preloading - Part 6: Plain chamfered washers EN 14399-7, High-strength structural bolting assembli

40、es for preloading - Part 7: System HR - Countersunk head bolt and nut assemblies EN 14399-8, High-strength structural bolting assemblies for preloading - Part 8: System HV - Hexagon fit bolt and nut assemblies EN 14399-9, High-strength structural bolting assemblies for preloading - Part 9: System HR

41、 or HV - Direct tension indicators for bolt and nut assemblies EN 14399-10, High-strength structural bolting assemblies for preloading - Part 10: System HRC - Bolt and nut assemblies with calibrated preload EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part

42、1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread (ISO 898-1) EN ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with specified property classes - Coarse thread and fine pitch thread (ISO 898-2) 3 Terms

43、and definitions For the purposes of this document, the terms and definitions given in EN 14399-1:2015 apply. DIN EN 14399-2:2015-04 EN 14399-2:2015 (E) 6 4 Symbols and units A elongation, (mm) Asnominal stress area of the bolt, (mm2) (see EN ISO 898-1) d nominal thread diameter, (mm) Fbbolt force du

44、ring the test, (kN) Fbiindividual value of the bolt force related to a given nut rotation, torque or bolt elongation, (kN) Fbmmean value of Fbivalues, (kN) Fbi,maxindividual value of the maximum bolt force reached during the test, (kN) Fp,Crequired preload of 0,7 fubAs, (kN) fubnominal tensile stren

45、gth (Rm,nom), (MPa) k k-factor kiindividual value of the k-factor kmmean value of the k-factor lb,effeffective preloaded bolt length given as the clamp length (t) plus half the nominal nut height, (mm) M torque applied during the test, (Nm) Miindividual value of the torque applied during the test, (

46、Nm) Mpiindividual value of the torque at which the bolt force has first reached the value of Fp,C, (Nm) Mspecspecified value of the torque to be applied to the bolting assemblies, (Nm) n number of test results sFestimated standard deviation of the Fbivalues for a tightening torque Mspecskestimated s

47、tandard deviation of the ki-values for the preload Fp,CVkcoefficient of variation of the k-factor for the preload Fp,C angle of rotation of the nut relative to the bolt, () piindividual value of the angle at which the bolt force has first reached the value of Fp,C, () 1iindividual value of the angle

48、 at which the bolt force has reached its maximum value Fbi,max, () 2iindividual value of the angle , () 1iindividual angle difference (1i pi), () 2iindividual angle difference (2i pi), () 2minminimum required value of the angle difference 2ias specified in the relevant product standard () t clamp length given as the total thickness of the clamped parts between the nut bearing face and the bolt head bearing face, (mm) DIN EN 14399-2:2015-04 EN 14399-2:2015 (E