1、March 2008DEUTSCHE NORM English price group 12No part of this standard 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 21.060.01!$MP“1424593www
2、.din.deDDIN EN 14399-8High-strength structural bolting assemblies for preloading Part 8: System HV Hexagon fit bolt and nut assembliesEnglish version of DIN EN 14399-8:2008-03Hochfeste planmig vorspannbare Schraubenverbindungen fr den Metallbau Teil 8: System HV Garnituren aus Sechskant-Passschraube
3、n und MutternEnglische Fassung DIN EN 14399-8:2008-03SupersedesDIN 7999:1983-12www.beuth.deDocument comprises 21 pagesDIN EN 14399-8:2008-03 2 National foreword This standard has been prepared by Technical Committee CEN/TC 185 “Fasteners” (Secretariat: DIN, Germany). The responsible German body invo
4、lved in its preparation was the Normenausschuss Mechanische Verbin-dungselemente (Fasteners Standards Committee), Technical Committee NA 067-03-04 AA Schraubenverbin-dungen fr den Stahlbau. The European Standards referred to in clause 2 of the EN have been published as the corresponding DIN EN Stand
5、ards with the same number. The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: ISO 261 DIN ISO 261 ISO 965-2 DIN ISO 965-2 ISO 965-5 DIN ISO 965-5 Amendments This standard differs from DIN 7999:1983-12 as follows: a) Bolts and nuts are now
6、 specified as being part of an assembly. b) Normative references have been updated. c) Nominal size M36 has been included. d) Dimension b (thread length) has been amended. e) For shaft diameter ds,limiting values have been specified. f) Values for dw minhave been modified. g) Dimension eminfor nomin
7、al sizes M12 and M20 has been modified. h) Values for kmin, kmaxand kw minhave been specified. i) Values for rmin have been modified. j) The width across flats smaxfor nominal sizes M12 and M20 has been modified and values for sminhave been specified for all nominal sizes. k) Specifications for bolt
8、s and nuts have been given in more detail. l) Details relating to suitability tests have been included. m) Designations in the figure of the bolt have been modified. n) Values for lsand lghave been modified. o) The clamp length has been redefined and clamp length values changed accordingly. p) Infor
9、mation on masses is no longer included. DIN EN 14399-8:2008-03 3 Previous editions DIN 7999: 1982-03, 1983-12 National Annex NA (informative) Bibliography DIN ISO 261, ISO general purpose metric screw threads General plan DIN ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Lim
10、its of sizes for general DIN 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 galvanizing purpose external and internal screw threa
11、ds; medium quality DIN EN 14399-8:2008-03 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14399-8 December 2007 ICS 21.060.01 English Version High-strength structural bolting assemblies for preloading - Part 8: System HV - Hexagon fit bolt and nut assemblies B
12、oulonnerie de construction mtallique haute rsistance apte la prcontrainte - Partie 8: Systme HV - Boulons ajusts tte hexagonale (vis + crou) Hochfeste planmig vorspannbare Schraubenverbindungen fr den Metallbau - Teil 8: System HV - Garnituren aus Sechskant-Passschrauben und Muttern This European St
13、andard was approved by CEN on 10 November 2007. 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 bibliographical references concern
14、ing such national standards may be obtained on application to the CEN 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 responsibility of a CEN member into its own
15、language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania
16、, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN
17、 All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14399-8:2007: EEN 14399-8:2007 (E) Contents Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Fit bolts .6 5 Nuts .12 6 Designation of the fit bol
18、t/nut assembly .14 7 Associated washers 14 8 Functional characteristics of the fit bolt/nut/washer(s) assembly .14 Bibliography 17 Figures Figure 1 Dimensions of fit bolts7 Figure 2 Clamp length t.7 Figure 3 Example for marking of a bolt 12 Figure 4 Dimensions of nuts 12 Figure 5 Example for marking
19、 of a nut.14 Tables Table 1 Systems of bolt/nut/washer(s) assemblies4 Table 2 Dimensions of fit boltsa.8 Table 3 Clamp length ta10 Table 4 Specifications for bolts and reference standards11 Table 5 Dimensions of nutsa12 Table 6 Specifications for nuts and reference standards.13 Table 7 Values for 11
20、5 Table 8 Values for 215 DIN EN 14399-8:2008-03 2 PageEN 14399-8:2007 (E) Foreword This document (EN 14399-8:2007) has been prepared by Technical Committee CEN/TC 185 “Fasteners”, the se-cretariat of which is held by DIN. This European Standard shall be given the status of a national standard, eithe
21、r by publication of an identical text or by endorsement, at the latest by June 2008, and conflicting national standards shall be withdrawn at the latest by June 2010. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-tries are bound to impl
22、ement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Den-mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerlan
23、d and the United Kingdom. DIN EN 14399-8:2008-03 - : -3 EN 14399-8:2007 (E) 4 Introduction This document for structural bolting reflects the situation in Europe where two technical solutions exist to achieve the necessary ductility of bolt/nut/washer assemblies. These solutions utilize different sys
24、tems (HR and HV) of bolt/nut/washer assemblies, see Table 1. Both systems are well proved and it is up to the experts responsible for 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
25、 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. Table 1 Systems of bolt/nut/washer(s) assemblies Bolt/nut/washer(s) assembly System HR Bolt/nut/washer(s) assembly S
26、ystem HV General requirements EN 14399-1 Bolt/nut assemblies EN 14399-3, EN 14399-7 EN 14399-4, EN 14399-8 Marking HR HV Property classes 8.8/8 10.9/10 10.9/10 Washer(s) EN 14399-5 or EN 14399-6 EN 14399-5 or EN 14399-6 Marking H H Suitability test for preloading EN 14399-2 EN 14399-2 Preloaded bolt
27、ed assemblies are very sensitive to differences in manufacture and lubrication. Therefore it is important that the assembly is supplied by one manufacturer who is always responsible for the function of the assembly. For the same reason it is important that the coating of the assembly is under the co
28、ntrol of the manufacturer. Beside the mechanical properties of the components, the functionality of the assembly requires that the specified pre-load can be achieved if the assembly is tightened with a suitable procedure. For this purpose a test method for the suitability of the components for prelo
29、ading was created which will demonstrate whether the function of the assembly 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 justified by the following reasons
30、. 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 excentrically to the bolt axis. For the size M20 the width across flats of 34 mm i
31、s 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 is already common practice in Europe. Attention is drawn to the importance of ensuring that the bolts are correctly used if satisfactory res
32、ults are to be obtained. For recommendations concerning proper application, reference to prEN 1090-2 is made. DIN EN 14399-8:2008-03 4EN 14399-8:2007 (E) 5 1 Scope This document belongs to the suite of European Standards EN 14399 and is designed to be read in conjunction with EN 14399-1 for: general
33、 requirements; testing for conformity evaluation; evaluation of conformity; regulatory marking; for assemblies of high-strength structural fit bolts and nuts of system HV suitable for preloaded joints with, thread sizes M12 to M36 and bolt property class 10.9 and EN 14399-2 for suitability testing.
34、This part gives requirements for: dimensions; associated washer(s) according to EN 14399-6; performance and suitability tests for assemblies with thread sizes M12 to M36 and bolt property class 10.9. Assemblies of hexagon fit bolts with shaft diameter (d + 1 mm) and nuts according to this part of th
35、is European Standard have been designed to allow preloading of at least 0,7 fub As1)according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by deformation of the engaged thread. For this purpose the components have the following characteristics: nut height approximately 0,8 d; he
36、xagon fit bolt with short thread length. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendm
37、ents) applies. EN 1993-1-8, Eurocode 3: Design of steel structures Part 1-8: Design of joints EN 10045-1, Metallic materials - Charpy impact test - Part 1: Test method EN 14399-1:2005, High-strength structural bolting assemblies for preloading - Part 1: General requirements EN 14399-2:2005, High-str
38、ength structural bolting assemblies for preloading - Part 2: Suitability test for preloading 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 2089
39、8-2, Mechanical properties of fasteners - Part 2: Nuts with specified proof load values - Coarse thread (ISO 898-2:1992) 1) fubis the nominal tensile strength (Rm) and Asis the nominal stress area of the bolt. DIN EN 14399-8:2008-03 5EN 14399-8:2007 (E) 6 EN 26157-1, Fasteners - Surface discontinuit
40、ies - Part 1: Bolts, screws and studs for general requirements (ISO 6157-1:1988) EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs (ISO 898-1:1999) EN ISO 3269, Fasteners - Acceptance inspection (ISO 3269:2000) EN ISO 4759-1, Tole
41、rances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C (ISO 4759-1:2000) EN ISO 6157-2, Fasteners - Surface discontinuities - Part 2: Nuts (ISO 6157-2:1995) EN ISO 10684, Fasteners - Hot dip galvanized coatings (ISO 10684:2004) ISO 148-1, Metallic materials - Charpy
42、 pendulum impact test - Part 1: Test method 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 purpos
43、e 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 galvanizing 3 Terms and definitions For the purposes of this document, the terms and definitions given in E
44、N 14399-1:2005 and EN 14399-2:2005 ap-ply. 4 Fit bolts 4.1 General The test method for suitability for preloading shall be as specified in EN 14399-2. 4.2 Dimensions of fit bolts Dimensions see Figure 1 and Table 2, clamp length see Figure 2 and Table 3. DIN EN 14399-8:2008-03 6EN 14399-8:2007 (E) 7
45、 aincomplete thread u 2P b15 to 30 Figure 1 Dimensions of fit bolts Figure 2 Clamp length t DIN EN 14399-8:2008-03 7EN 14399-8:2007 (E) 8 Table 2 Dimensions of fit boltsa Dimensions in millimetresThread d M12 M16 M20 M22 M24 M27M30 M36 Pb 1,75 2 2,5 2,5 3 3 3,5 4 b (ref.)23 28 33 34 39 41 44 52 min.
46、 0,4 0,4 0,4 0,4 0,4 0,4 0,4 0,4 c max. 0,6 0,6 0,8 0,8 0,8 0,8 0,8 0,8 damax. 15,2 19,2 24 26 28 32 35 41 nom. 13 17 21 23 25 28 31 37 min.c12,74 16,74 20,71 22,71 24,71 27,71 30,67 36,67 dsmax.c12,85 16,85 20,84 22,84 24,84 27,84 30,83 36,83 min. 20,1 24,929,533,338,042,846,655,9dwmax. d dd d d d
47、d d e min. 23,91 29,56 35,03 39,55 45,20 50,85 55,37 66,44 nom. 8 10 13 14 15 17 19 23 min. 7,55 9,25 12,1 13,1 14,1 16,1 17,95 21,95 k max. 8,45 10,75 13,9 14,9 15,9 17,9 20,05 24,05 kwmin. 5,28 6,47 8,47 9,17 9,87 11,27 12,56 15,36 r min. 1,2 1,2 1,5 1,5 1,5 2 2 2 max. 22 27 32 36 41 46 50 60 s mi
48、n. 21,16 26,16 31 35 40 45 49 58,8 ymax. 6,5 7,5 8,5 8,5 10,0 10,0 11,5 13,0 DIN EN 14399-8:2008-03 8EN 14399-8:2007 (E) 9 Table 2 (continued) Dimensions in millimetresThread d M12 M16 M20 M22 M24 M27M30 M36 l lsfand lge lslglslglslglslglslglslglslglslgnom. min. max. min. max. min. max. min. max. mi
49、n. max. min. max. min. max. min. max. min. max. 50 48,75 51,25 20,5 27 55 53,5 56,5 25,5 32 60 58,5 61,5 30,5 37 65 63,5 66,5 35,5 42 29,5 37 70 68,5 71,5 40,5 47 34,5 42 75 73,5 76,5 45,5 52 39,5 47 33,5 42 80 78,5 81,5 50,5 57 44,5 52 38,5 47 37,5 46 85 83,25 86,75 55,5 62 49,5 57 43,5 52 42,5 51 90 88,25 91,75 60,5 67 54,5 62 48,5 57 47,5 56 41 51 95 93,25 96,75 65,5 72 59,5 67 53,5 62 52,5 61 46 56 44 54 100 98,25 101,7
