EN 14399-8-2018 High-strength structural bolting assemblies for preloading - Part 8 System HV - Hexagon fit bolt and nut assemblies.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06High-strength structural bolting assemblies for preloadingPart 8: System HV Hexagon fit bolt and nut assembliesBS EN 14399-8:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14399-8 July 2018 ICS 21.060.01 Super

2、sedes EN 14399-8:2007English Version High-strength structural bolting assemblies for preloading - Part 8: System HV - Hexagon fit bolt and nut assembliesBoulonnerie de construction mtallique haute rsistance apte la prcontrainte - Partie 8 : Systme HV - Boulons ajusts tte hexagonale (vis + crou) Hoch

3、feste vorspannbare Garnituren fr Schraubverbindungen im Metallbau - Teil 8: System HV - Garnituren aus Sechskant-Passschrauben und Muttern This European Standard was approved by CEN on 15 October 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the cond

4、itions 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 Standard exist

5、s 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 national stan

6、dards 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, Serbia, Slov

7、akia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any

8、means reserved worldwide for CEN national Members. Ref. No. EN 14399-8:2018 ENational forewordThis British Standard is the UK implementation of EN 14399-8:2018. It supersedes BS EN 14399-8:2007, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee FME/9/-/2

9、, Fasteners for structural bolting.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Insti

10、tution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 92174 2ICS 21.060.01Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2018.Amendments/cor

11、rigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 14399-8:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14399-8 July 2018 ICS 21.060.01 Supersedes EN 14399-8:2007English Version High-strength structural bolting assemblies for preloading - Part 8: System HV - Hexagon

12、fit bolt and nut assembliesBoulonnerie de construction mtallique haute rsistance apte la prcontrainte - Partie 8 : Systme HV - Boulons ajusts tte hexagonale (vis + crou) Hochfeste vorspannbare Garnituren fr Schraubverbindungen im Metallbau - Teil 8: System HV - Garnituren aus Sechskant-Passschrauben

13、 und Muttern This European Standard was approved by CEN on 15 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 without any alteration. Up-to-date lists and biblio

14、graphical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 responsi

15、bility 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, Denmark, Estonia, Finland, Former Yugoslav Republ

16、ic 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. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE

17、 NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14399-8:2018 EBS EN 14399-8:2018EN 14399-8:2018 (E) 2 Contents

18、Page European foreword . 3 Introduction 4 1 Scope 6 2 Normative references 6 3 Fit bolts . 7 3.1 Dimensions of fit bolts . 7 3.2 Specifications for fit bolts and reference standards 10 3.3 Marking of fit bolts. 11 4 Nuts . 11 4.1 Dimensions of nuts 11 4.2 Specification for nuts and reference standar

19、ds 13 4.3 Decarburization of the nut thread . 13 4.4 Marking of nuts . 13 5 Designation of the bolt/nut assemblies . 14 6 Associated washers . 14 7 Functional characteristics of the bolt/nut/washers assembly . 14 7.1 General . 14 7.2 Maximum individual value of the bolt force during fitness for purp

20、ose test (Fbi max) . 15 7.3 Values of angle 1. 15 7.4 Values of angle 2. 15 7.5 Individual values of the k-factor (ki), mean value of the k-factor (km) and coefficient of variation of the k-factor (Vk) . 15 7.5.1 Individual values of the k-factor (ki) for k-class K1 . 15 7.5.2 Mean value of the k-fa

21、ctor (km) and coefficient of variation of the k-factor (Vk) for k-class K2 16 Annex A (normative) Clamp lengths and grip lengths . 17 Bibliography . 20 BS EN 14399-8:2018EN 14399-8:2018 (E) 3 European foreword This document (EN 14399-8:2018) has been prepared by Technical Committee CEN/TC 185 “Faste

22、ners”, the secretariat of which is held by BSI. 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 January 2019 and conflicting national standards shall be withdrawn at the latest by January 2019. At

23、tention 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 rights. This document supersedes EN 14399-8:2007. In comparison with EN 14399-8:2007, the following modificatio

24、ns have been made: Table 1 containing the overview of the composition of bolting assemblies and component marking has been added; the coefficient of variation of the k-factor, Vk, was changed from 0,10 to 0,06; specifications for the designation of the bolting assemblies have been revised; Annex A w

25、ith detailed specifications on clamp lengths and grip lengths has been added. EN 14399 consists of the following parts, under the general title High-strength structural bolting assemblies for preloading: Part 1: General requirements; Part 2: Suitability for preloading; Part 3: System HR Hexagon bolt

26、 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 assemblies; Part 9: System HR or HV Direct tension indicators for bol

27、t 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 European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Cz

28、ech 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the Unit

29、ed Kingdom. BS EN 14399-8:2018EN 14399-8:2018 (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/washers assemblies. These solutions consist of two different types (HR and HV) of b

30、olt/nut/washer assemblies, see Table 1. Both types are well proven and it is the responsibility of the experts using structural bolting whether they use the one or the other type. It is, however, important for the performance of the assembly to avoid mixing up the components of both types. Therefore

31、, bolts and nuts for both types are standardized in one single part of this European Standard each and the marking of the components of the bolting assemblies is uniform. Preloaded bolted assemblies are very sensitive to differences in manufacture and lubrication. Therefore, it is important that the

32、 bolting assemblies are supplied by one manufacturer, who is always responsible for the functionality of the bolting assemblies as supplied. For the same reason it is important that coating of the bolting assemblies is under the control of one manufacturer. Beside the mechanical properties of the co

33、mponents, 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 assemblies for preloading was created, which will demonstrate

34、 whether the functionality of the bolting assemblies is fulfilled. It should be pointed out that compared to ISO 272 the width across flats (large series) for M12 and M20 have been changed to 22 mm and 32 mm respectively. These changes are justified by the following reasons. Under the specific condi

35、tions 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 width across flats of 34 mm is very difficult to be p

36、roduced. 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 already common practice in Europe. BS EN 14399-8:2018EN14399-8:2018(E)5Table1Compositionofhigh-strength structuralboltingassembliesand componentmarkingTypeofbol

37、tingassemblySystemHRSystemHVSystemHRCGeneralrequirementsEN14399-1SuitabilityforpreloadingEN14399-2and, if any, additional testingspecifiedinthe productstandardBoltand nutEN14399-3EN14399-7EN14399-4EN14399-8EN14399-10Marking BoltHR8.8HR10.9HR8.8HR10.9HV10.9HVP10.9HRC10.9NutHR8orHR10HR10HR8orHR10HR10H

38、V10HV10HR10HRD10Washer(s)EN14399-5aorEN14399-6EN14399-6EN14399-5aorEN14399-6MarkingH orHbH orHVbH orHRbH orHRborHDcDirecttensionindicatorandnutfacewasher or boltfacewasher, ifanyEN14399-9NotapplicableMarking DirecttensionindicatorH8H10H8H10H10NutfacewasherHNHNBoltface washerHBNotapplicableHBaEN14399

39、-5can onlybeusedunderthenut.bAt thechoiceofthemanufacturer.cMandatorymarkforwasherswithenlargedouterdiameteraccordingtoEN14399-5only.BS EN 14399-8:2018EN 14399-8:2018 (E) 6 1 Scope This European Standard specifies together with EN 14399-1 and EN 14399-2, the requirements for assemblies of high-stren

40、gth structural bolts and nuts of system HV suitable for preloaded joints with large width across flats, thread sizes M12 to M36 and property classes 10.9/10. Bolting assemblies (including fit bolts with nominal shank diameter d + 1 mm) in accordance with this document have been designed to allow pre

41、loading of at least 0,7 fub As1)according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by plastic deformation of the engaged threads. For this purpose, the components have the following characteristics: nut height approximately 0,8 D; bolt with short thread length. Bolting assem

42、blies in accordance with this document include washers according to EN 14399-6. NOTE Attention is drawn to the importance of ensuring that the bolting assemblies are correctly used if satisfactory results are to be obtained. For recommendations concerning proper application, reference to EN 1090-2 i

43、s made. General requirements and requirements for suitability for preloading are specified in EN 14399-2. Clamp lengths and grip lengths for the bolting assemblies are specified in the normative Annex A. 2 Normative references The following documents, in whole or in part, are normatively referenced

44、in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 14399-1, High-strength structural bolting assemblies for preloading - Part 1:

45、 General requirements EN 14399-2, High-strength structural bolting assemblies for preloading - Part 2: Suitability for preloading EN 14399-6, High-strength structural bolting assemblies for preloading - Part 6: Plain chamfered washers EN 14399-9, High-strength structural bolting assemblies for prelo

46、ading - Part 9: System HR or HV - Direct tension indicators for bolt and nut assemblies EN 26157-1, Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements (ISO 26157-1) EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Par

47、t 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) EN ISO

48、 3269, Fasteners - Acceptance inspection (ISO 3269) EN ISO 4759-1, Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C (ISO 4759-1) 1) fubis the nominal tensile strength (Rm) and Asis the nominal stress area of the bolt. BS EN 14399-8:2018EN 14399-8:2018 (E)

49、7 EN ISO 6157-2, Fasteners - Surface discontinuities - Part 2: Nuts (ISO 6157-2) EN ISO 10684, Fasteners - Hot dip galvanized coatings (ISO 10684) ISO 261, ISO general purpose metric screw threads - General plan ISO 965-2, ISO general purpose metric screw threads - Tolerances - Part 2: Limits of sizes for general purpose external and internal screw threads - Medium quality ISO 965-5, ISO general purpose metric screw threads - Tolerances - Part 5: Limits of sizes for internal screw threads to mate