1、BSI Standards PublicationBS EN 14399-3:2015High-strength structuralbolting assemblies forpreloadingPart 3: System HR Hexagon bolt and nutassembliesBS EN 14399-3:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14399-3:2015.It supersedes BS EN 14399-3:2005 wh
2、ich is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FME/9/-/2, Fasteners for structural bolting.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprov
3、isions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 81779 3ICS 21.060.01; 21.060.10; 21.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British
4、Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2015.Amendments issued since publicationDate Text affectedBS EN 14399-3:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14399-3 February 2015 ICS 21.060.01 Supersedes EN 14399-3:2005Engli
5、sh Version High-strength structural bolting assemblies for preloading - Part 3: System HR - Hexagon bolt and nut assemblies Boulonnerie de construction mtallique haute rsistance apte la prcontrainte - Partie 3 : Systme HR - Boulons tte hexagonale (vis + crou) Hochfeste vorspannbare Garnituren fr Sch
6、raubverbindungen im Metallbau - Teil 3: System HR - Garnituren aus Sechskantschrauben und -muttern 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 the conditions for giving this European Standard
7、 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 exists in three official versions (English, F
8、rench, 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 standards bodies of Austria, Belgium, Bulgar
9、ia, 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, Slovenia, Spain, Sweden, Switzerland, Turk
10、ey 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 means reserved worldwide for CEN national Members. R
11、ef. No. EN 14399-3:2015 EBS EN 14399-3:2015EN 14399-3:2015 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 6 2 Normative references 6 3 Bolts 7 3.1 Dimensions of bolts.7 3.2 Specification for bolts and reference standard . 11 3.3 Marking of bolts 11 4 Nuts 12 4.1 Dimensions of nuts. 12 4.2 Sp
12、ecification for nuts and reference standards 14 4.3 Proof load values of nuts . 15 4.4 Decarburization of the nut thread . 15 4.5 Marking of nuts . 15 5 Designation of the bolt/nut assemblies 16 6 Associated washers . 16 7 Functional characteristics of the bolt/nut/washer(s) assembly . 16 7.1 Genera
13、l . 16 7.2 Maximum individual value of the bolt force during fitness for purpose test (Fbi,max) 17 7.3 Values of angle 1. 17 7.4 Values of angle 2. 17 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) . 17 7.5.1 Individual v
14、alues of the k-factor (ki) for k-class K1 17 7.5.2 Mean value of the k-factor (km) and coefficient of variation of the k-factor (Vk) for k-class K2 . 18 Annex A (normative) Clamp lengths and grip lengths . 19 A.1 Clamp lengths for bolting assemblies with one or two washers . 19 A.2 Grip lengths for
15、bolting assemblies with one or two washers 22 Bibliography . 28 BS EN 14399-3:2015EN 14399-3:2015 (E) 3 Foreword This document (EN 14399-3:2015) has been prepared by Technical Committee CEN/TC 185 “Fasteners”, the secretariat of which is held by DIN. This European Standard shall be given the status
16、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 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject
17、 of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14399-3:2005. In comparison with EN 14399-3:2005, the following modifications have been made: Table 1 containing the overview of the composition of bolting a
18、ssemblies 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 with detailed specifications on clamp lengths and grip lengths has been added. EN 1
19、4399 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 and nut assemblies; Part 4: System HV Hexagon bolt and nut assemblies; Part 5: Pl
20、ain 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 bolt and nut assemblies; Part 10: System HRC Bolt and nut assemblies with calibrated
21、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, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fr
22、ance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14399-3:2015EN 14399-3:2015 (E) 4 Introduction This document on structur
23、al bolting reflects the situation in Europe where two technical solutions exist to achieve the necessary ductility of bolt/nut/washer(s) assemblies. These 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 res
24、ponsibility of the experts using structural bolting whether they use the one or the other system. It is, however, important for the performance of the 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 Eu
25、ropean Standard each and the marking of the components of the same system is uniform. Preloaded bolted assemblies are very sensitive to differences in manufacture and lubrication. Therefore it is important that the bolting assemblies are supplied by one manufacturer who is always responsible for the
26、 functionality of the bolting assemblies. 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 components, the functionality of the bolting assemblies requires that the specified preload can be ac
27、hieved 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 whether the functionality of the bolting assemblies is fulfilled. It should be pointed out that co
28、mpared 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 justified by the following reasons. Under the specific conditions of structural bolting, the compressive stresses under the bolt head or nut for the sizes M12
29、 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 produced. The change to 32 mm is primarily motivated by economics but it should also be pointed out
30、 that the width across flats of 32 mm was common practice in Europe. BS EN 14399-3:2015EN 14399-3:2015 (E) 5 Table 1 Composition of high-strength structural bolting assemblies and component marking Type of bolting assembly System HR System HV System HRC General requirements EN 14399-1 Suitability fo
31、r preloading EN 14399-2 and, if any, additional testing specified in the product standard Bolt and nut EN 14399-3 EN 14399-7 EN 14399-4 EN 14399-8 EN 14399-10 MarkingBolt HR8.8 HR10.9 HR8.8 HR10.9 HV10.9 HVP10.9 HRC10.9 Nut HR8 or HR10 HR10 HR8 or HR10 HR10 HV10 HV10 HR10 HRD10 Washer(s) EN 14399-5a
32、or EN 14399-6 EN 14399-6 EN 14399-5aor EN 14399-6 Marking H or HRbH or HVbH or HRbH or HRbor HDcDirect tension indicator and nut face washer or bolt face washer, if any EN 14399-9 Not applicable MarkingDirect tension indicator H8 H10 H8 H10 H10 Nut face washer HN HN Bolt face washer HB Not applicabl
33、e HB aEN 14399-5 can only be used under the nut. bAt the choice of the manufacturer. cMandatory mark for washers with enlarged outer diameter according to EN 14399-5 only. BS EN 14399-3:2015EN 14399-3:2015 (E) 6 1 Scope This European Standard specifies, together with EN 14399-1 and EN 14399-2, the r
34、equirements for assemblies of high-strength structural bolts and nuts of system HR suitable for preloaded joints with large widths across flats, thread sizes M12 to M36 and property classes 8.8/8 or 8.8/10 and 10.9/10. Bolting assemblies in accordance with this document have been designed to allow p
35、reloading of at least 0,7 fub As1)according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by plastic elongation of the bolt. For this purpose the components have the following characteristics: normal nut height (style 1), see EN ISO 4032; thread length of the bolt according to IS
36、O 888. Bolting assemblies in accordance with this document include washers according to EN 14399-6 or to EN 14399-5 (under the nut only). NOTE Attention is drawn to the importance of ensuring that bolting assemblies are correctly used if satisfactory results are to be obtained. For recommendations c
37、oncerning proper application, reference to EN 1090-2 is 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 docum
38、ents, in whole or in part, are normatively referenced 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
39、structural bolting assemblies for preloading - Part 1: General requirements EN 14399-2, High-strength structural bolting assemblies for preloading - Part 2: Suitability for preloading EN 14399-5, High-strength structural bolting assemblies for preloading - Part 5: Plain washers EN 14399-6, High-stre
40、ngth structural bolting assemblies for preloading - Part 6: Plain chamfered washers EN 26157-1, Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements (ISO 6157-1) EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1:
41、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 3269
42、, 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) EN ISO 6157-2, Fasteners - Surface discontinuities - Part 2: Nuts (ISO 6157-2) 1) fubis the nominal tensile strength (Rm) and Asthe
43、nominal stress area of the bolt. BS EN 14399-3:2015EN 14399-3:2015 (E) 7 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 g
44、eneral 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 with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizin
45、g ISO 3508, Thread run-outs for fasteners with thread in accordance with ISO 261 and ISO 262 3 Bolts 3.1 Dimensions of bolts See Figure 1 and Table 2. Key a incomplete thread u 2P b 15 to 30 Figure 1 Dimensions of bolts The difference between lgand lsshould not be less than 1,5 P. For coated bolts,
46、the dimensions apply prior to coating. BS EN 14399-3:2015EN 14399-3:2015 (E) 8 Table 2 Dimensions of bolts Dimensions in millimetres Thread (d) M12 (M14)aM16 (M18)aM20 Pb1,75 2 2 2,5 2,5 b (ref.) c 30 34 38 42 46 d 40 44 48 52 e 65 c max. 0,8 0,8 0,8 0,8 0,8 min. 0,4 0,4 0,4 0,4 0,4 damax. 15,2 17,2
47、 19,2 21,7 24,4 dsmax. 12,70 14,70 16,70 18,70 20,84 min. 11,30 13,30 15,30 17,30 19,16 dwmax. f f f f f min. 20,1 22,0 24,9 27,7 29,5 e min. 23,91 26,17 29,56 32,95 35,03 k nom. 7,5 8,8 10 11,5 12,5 max. 7,95 9,25 10,75 12,40 13,40 min. 7,05 8,35 9,25 10,60 11,60 kwmin. 4,90 5,85 6,50 7,42 8,10 r m
48、in. 1,2 1,2 1,2 1,5 1,5 s max. 22 24 27 30 32 min. 21,16 23,16 26,16 29,16 31,00 l lsand lgg,hlslglslglslglslglslgnom. min. max. min. max. min. max. min. max. min. max. min. max. 35 33,75 36,25 7 40 38,75 41,25 7 8 45 43,75 46,25 6,25 15 8 50 48,75 51,25 11,25 20 8 8 10 55 53,5 56,5 16,25 25 11 21 8
49、 10 60 58,5 61,5 21,25 30 16 26 12 22 10 10 65 63,5 66,5 26,25 35 21 31 17 27 10,5 23 10 70 68,5 71,5 31,25 40 26 36 22 32 15,5 28 11,5 24 75 73,5 76,5 36,25 45 31 41 27 37 20,5 33 16,5 29 80 78,5 81,5 41,25 50 36 46 32 42 25,5 38 21,5 34 85 83,25 86,75 46,25 55 41 51 37 47 30,5 43 26,5 39 90 88,25 91,75 51,25 60 46 56 42 52 35,5 48 31,5 44 95 93,25 96,75 56,25 65 51 61 47 57 40,5 53 36,5 49 100 98,25 101,75 61,25 70 56 66 52 62 45,5 58 41,5 54 BS EN 14
