DIN EN 14399-10-2009 High-strength structural bolting assemblies for preloading - Part 10 System HRC - Bolt and nut assemblies with calibrated preload English version of DIN EN 143.pdf

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1、July 2009DEUTSCHE 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!$XTn“1534975www

2、.din.deDDIN EN 14399-10High-strength structural bolting assemblies for preloading Part 10: System HRC Bolt and nut assemblies with calibrated preloadEnglish version of DIN EN 14399-10:2009-07Hochfeste planmig vorspannbare Schraubenverbindungen fr den Metallbau Teil 10: System HRC Garnituren aus Schr

3、auben und Muttern mit kalibrierter VorspannungEnglische Fassung DIN EN 14399-10:2009-07www.beuth.deDocument comprises 23 pagesDIN EN 14399-10:2009-07 2 National foreword This standard has been prepared by Technical Committee CEN/TC 185 “Fasteners” (Secretariat: DIN, Germany). The responsible German

4、body involved in its preparation was the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee), Technical Committee NA 067-03-04 AA Schrauben-verbindungen fr den Stahlbau. The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are a

5、s follows: ISO 261 DIN ISO 261 ISO 965-2 DIN ISO 965-2 ISO 965-5 DIN ISO 965-5 National Annex NA (informative) Bibliography DIN ISO 261, ISO general purpose metric screw threads General plan DIN ISO 272, Fasteners Width across Flats for Hexagon Products DIN ISO 965-2, ISO general purpose metric scre

6、w threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw threads; medium quality 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 maxim

7、um size of tolerance position h before galvanizing EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14399-10March 2009ICS 21.060.01English VersionHigh-strength structural bolting assemblies for preloading - Part10: System HRC - Bolt and nut assemblies with calibratedpreloadBoulonnerie de constructi

8、on mtallique haute rsistanceapte la prcontrainte - Partie 10: Systme HRC - Boulons(vis + crou + rondelle) prcontrainte calibreHochfeste planmig vorspannbareSchraubenverbindungen fr den Metallbau - Teil 10:System HRC - Garnituren aus Schrauben und Muttern mitkalibrierter VorspannungThis European Stan

9、dard was approved by CEN on 24 January 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning s

10、uch nationalstandards 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 translationunder the responsibility of a CEN member into its own language

11、 and notified to the CEN Management Centre has the same status as theofficial 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, Luxembou

12、rg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of ex

13、ploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14399-10:2009: EEN 14399-10:2009 (E) 2 Contents Page Foreword 4Introduction .51 Scope 62 Normative references 63 Terms and definitions .74 Bolts 74.1 Dimensions of bolts .74.2 Specification for bolts and r

14、eference standards . 124.3 Marking of bolts 125 Nuts 135.1 Dimensions of nuts. 135.2 Specification for nuts and reference standards 155.3 Proof load values of nuts . 155.4 Decarburization of the nut thread . 165.5 Marking of nuts . 166 Designation of the bolt/nut assembly . 177 Associated washers .

15、178 Functional characteristics of the bolt/nut/washer assembly . 188.1 General . 188.2 Suitability test for preloading 188.3 Suitability test for calibrated preload . 188.4 Requirements 19Bibliography . 21Figures Figure 1 Bolt HRC with hexagon head 8Figure 2 Bolt HRC with cup head 9Figure 3 Examples

16、 for bolt marking 13Figure 4 Dimension of the nut . 14Figure 5 Examples for nut marking . 17DIN EN 14399-10:2009-07 EN 14399-10:2009 (E) 3 Tables Table 1 Dimensions of hexagon boltsa. 9Table 2 Dimensions of cup head bolts ab. 11Table 3 Dimensions of spline-end a. 11Table 4 Specifications for bolts a

17、nd reference standards . 12Table 5 Dimensions of nuts according to EN 14399-3:2005 (HR) a. 14Table 6 Dimensions of nuts with height m = 1 d (HRD) a15Table 7 Specifications for nuts and reference standards 15Table 8 Proof load values of nuts 16Table 9 Limiting values of bolt force at the fracture of

18、the spline-end 20DIN EN 14399-10:2009-07 EN 14399-10:2009 (E) 4 Foreword This document (EN 14399-10:2009) 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 of a national standard, either by publi

19、cation of an identical text or by endorsement, at the latest by September 2009, and conflicting national standards shall be withdrawn at the latest by September 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not b

20、e held responsible for identifying any or all such patent rights. 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 test for preloading Part 3: System HR - Hexagon bolt and nu

21、t 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 bolt and n

22、ut 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, Cyprus, Czech Republic, De

23、nmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 14399-10:2009-07 EN 14399-10:2009 (E) 5 Introduction

24、 This part of this European Standard completes the series of European standards EN 14399 parts 1 to 10 which specify high-strength structural bolting for preloading; it belongs to the system HR. The specificity of bolt and nut assemblies with a calibrated preload, compared with the system HR as defi

25、ned in EN 14399-3, is the preload in the bolt which is controlled during tightening by the fracture of the spline-end of the bolt under torsional stress, this fracture occurring for a precise predetermined stress. Preloaded bolted assemblies are very sensitive to differences in manufacture and lubri

26、cation. 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 control of the manufacturer. Besides the mechanical properties of the comp

27、onents, the functionality of the assembly requires that the specified preload can be achieved when the fracture of the break neck at the spline-end of the bolt occurs under the predetermined torsional stress when the assembly is tightened with the appropriate procedure. For this purpose a test metho

28、d for the suitability of the components for preloading 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. T

29、hese 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 may become too large with the width across flats of 21 mm, especially if the washer is fitted eccentrically to the bolt axis;

30、 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 that the width across flats of 32 mm is already common practice in Europe. DIN EN 14399-10:2009-07 EN 14399-10:2009 (E) 6 1 Sc

31、ope This part of this European Standard specifies, together with EN 14399-1, the requirements for assemblies of high-strength structural bolts and nuts of system HRC suitable for preloaded joints, with hexagon head (large widths across flats) or cup head, thread sizes M12 to M30 and property class 1

32、0.9/10. Bolt and nut assemblies conforming to this part of this European Standard have been designed to allow preloading of at least 0,7 fub As1)according to EN 1993-1-8:2005 (Eurocode 3) and to obtain ductility predominantly by plastic elongation of the bolt. For this purpose the components have th

33、e following characteristics: nut according to EN 14399-3, or nut with height m = 1 d, thread length of the bolt according to ISO 888. Bolt and nut assemblies conforming to this part of this European Standard include washer(s) according to EN 14399-6 or to EN 14399-5 (under the nut only). NOTE Attent

34、ion is drawn to the importance of ensuring that the bolts are correctly used if a satisfactory result is to be obtained. The test method for suitability for preloading is specified in EN 14399-2 and in Clause 8. 2 Normative references The following referenced documents are indispensable for the appl

35、ication of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10045-1, Metallic materials Charpy impact test Part 1: Test method EN 14399-1, High-strength structural bolting

36、 assemblies for preloading Part 1: General requirements EN 14399-2:2005, High-strength structural bolting assemblies for preloading Part 2: Suitability test for preloading EN 14399-3:2005, High-strength structural bolting assemblies for preloading Part 3: System HR Hexagon bolt and nut assemblies EN

37、 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 20898-2, Mechanical properties of fasteners Part 2: Nuts with specified proof load values Coarse thread

38、 (ISO 898-2:1992) EN 26157-1, Fasteners Surface discontinuities 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) 1) fubis the nominal tensi

39、le strength (Rm) and Asthe stress area of the bolt. DIN EN 14399-10:2009-07 EN 14399-10:2009 (E) 7 EN ISO 3269, Fasteners Acceptance inspection (ISO 3269:2000) EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C (ISO 4759-1:2000) EN ISO 6157-2, Fas

40、teners 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 pendulum impact test Part 1: Test method ISO 261, ISO general purpose metric screw threads General plan ISO 965-2, ISO general purpo

41、se 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 with hot-dip galvanized external screw threads w

42、ith maximum size of tolerance position h before galvanizing 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 shear wrench electric or manual tool equipped with two co-axial sockets which react by torque one against the other: the outer socket

43、which engages the nut rotating clockwise; the inner socket which engages the spline-end of the bolt (i.e. bi-hexagonal) rotating anticlockwise NOTE The shear wrench operates as follows: during the tightening operation of an assembly, the socket in rotation is the one that finds the least resistance

44、to it; from the outset and right up to the final tightening stage, the outer socket on the nut rotates clockwise while the inner socket holds the spline-end without rotating, the result being that the bolt assembly is progressively tightened by the increasing torque applied to the nut; at the final

45、stage of tightening, i.e. when the torsional resistance plateau of the break-neck section is attained, the inner socket rotates anticlockwise while the outer socket on the nut provides the reaction without rotating; the bolt assembly installation is complete when the spline-end shears off at the bre

46、ak-neck section. 4 Bolts 4.1 Dimensions of bolts See Figures 1 and 2. Dimensions of bolts are in accordance with the relevant dimensions specified in EN 14399-3:2005, see Tables 1 and 2. Dimensions of the spline-end are specified in Table 3. DIN EN 14399-10:2009-07 EN 14399-10:2009 (E) 8 Key a Incom

47、plete thread u 2 P b15 to 30 NOTE The difference between lgand lsshould not be less than 1,5 P. Figure 1 Bolt HRC with hexagon head DIN EN 14399-10:2009-07 EN 14399-10:2009 (E) 9 Key aIncomplete thread u 2 P NOTE The difference between lgand lsshould not be less than 1,5 P. Figure 2 Bolt HRC with cu

48、p head Table 1 Dimensions of hexagon boltsaDimensions in millimetresThread d M12M16 M20 M22 M24 M27 M30 P b1,75 2 2,5 2,5 3 3 3,5 b (ref.) c30 38 46 50 54 60 66d 44 52 56 60 66 72 e 65 69 73 79 85c max. 0,8 0,8 0,8 0,8 0,8 0,8 0,8 min. 0,4 0,4 0,4 0,4 0,4 0,4 0,4 damax. 15,2 19,2 24,4 26,4 28,4 32,4 35,4 dsmax. 12,70 16,70 20,84 22,84 24,84 27,84 30,84 min. 11,30 15,30 19,16 21,16 23,16 26,16 29,16 dwmax. fmin. 20,1 24,9 29,5 33,3 38,0 42,8 46,6 e min. 23,91 29,56 35,03 39,55 45,20 50,85 55,37 k nom. 7,5 10 12,5 14 15 17 18,7max. 7,95 10,75 13,40 14,90 15,90 17,90 19,75 min. 7,05 9,25 11,