EN 14399-9-2009 en High-strength structural bolting assemblies for preloading - Part 9 System HR or HV - Direct tension indicators for bolt and nut assemblies《预加负荷用高强度结构螺栓组件 第9部分 H.pdf

1、BS EN 14399-9:2009ICS 21.060.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDHigh strength structural bolting for preloadingPart 9: System HR or HV - Direct tension indicators for bolt and nut assembliesThis British Standard was published under the authority o

2、f the Standards Policy and Strategy Committee on 31 July 2009 BSI 2009ISBN 978 0 580 54251 0Amendments/corrigenda issued since publicationDate CommentsBS EN 14399-9:2009National forewordThis British Standard is the official English language version of EN 143999: 2009. The standard supersedes BS 7644

3、-1:1993 and BS 7644-2:1993 which are declared obsolescent. The BS EN 14399 series of standards comprise ten parts. BS EN 143991:2005 provides the general and harmonization requirements to which the other parts, which provide specific requirements regarding manufacture, materials and testing, relate.

4、Following the agreement to extend the period of co-existence to two years for BS EN 14399 Parts 1 to 6, CEN/TC 185/WG 6 applied for and received approval for the same extension to be applied to all other struc-tural bolting standards.Direct Tension Indicators conforming to BS EN 143999:2009 are desi

5、gned and manufactured to work with bolt assemblies of property classes 8.8 and 10.9 conforming to BS EN 143993:2005 and property class 10.9 conforming to BS EN 143994:2005 to generate the axial tensile loads specified in BS EN 1090-2:2008The UK participation in its preparation was entrusted to Techn

6、ical Committee FME/9/1, Mechanical properties of fasteners.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.Comp

7、liance with a British Standard cannot confer immunity from legal obligations.BS EN 14399-9:2009EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN 14399-9March 2009ICS 21.060.01 English VersionHigh-strength structural bolting assemblies for preloading - Part 9: System HR or HV - Direct tension indic

8、ators for bolt and nut assembliesBoulonnerie de construction mtallique haute rsistance apte la prcontrainte - Partie 9 : Systme HR ou HV -Rondelles indicatrices de prcontrainte pour les boulonsHochfeste planmig vorspannbare Schraubenverbindungen fr den Metallbau - Teil 9: System HR oder HV - Direkte

9、 Kraftanzeiger fr Garnituren ausSchrauben und MutternThis European Standard 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 European Standard the status of a national standard without any

10、alteration. Up-to-date lists and bibliographical references concerning 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

11、translation under the responsibility of a CEN member into its own 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, Ge

12、rmany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, 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 NORMUN

13、GManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Ref. No. EN 14399-9:2009: EBS EN 14399-9:2009EN 14399-9:2009 (E) 2 Contents Page Foreword 4Introduction .51 Scope 62 Normative references

14、 63 Direct tension indicators .73.1 Dimensions .73.2 Specifications and reference standards .93.3 Performance test of direct tension indicators 93.4 Test method for measuring compression loads (all finishes) on direct tension indicators . 103.4.1 General . 103.4.2 Testing apparatus . 103.4.3 Compres

15、sion loading system 103.4.4 Support blocks 103.4.5 Bearing blocks 123.4.6 Calibration . 123.4.7 Test Procedure 123.5 Marking of the direct tension indicator 143.6 Designation of the direct tension indicator . 144 Nut face washers and bolt face washers . 154.1 Dimensions 154.2 Specifications and refe

16、rence standards for nut face washers and bolt face washers . 164.3 Marking 174.3.1 Nut face washers 174.3.2 Bolt face washers . 174.4 Designation . 174.4.1 Nut face washers 174.4.2 Bolt face washers . 185 Functional characteristics . 185.1 Assemblies 185.2 Functional characteristics of direct tensio

17、n indicators in the assembly 195.3 Functional characteristics of the bolt/nut/washer(s)/direct tension indicator assembly 205.3.1 General . 205.3.2 Test procedure 20Annex A (informative) Special testing conditions and procedures 22Bibliography . 23BS EN 14399-9:2009EN 14399-9:2009 (E) 3 Figures Figu

18、re 1 Dimensions of compressible washer-type direct tension indicator (example with six protrusions) . 8Figure 2 Support block 11Figure 3 Support block dimensions . 11Figure 4 Steps for determining compression load . 14Figure 5 Dimensions of nut face washers . 15Figure 6 Dimensions of bolt face washe

19、rs 16Figure 7 Tightening of the assembly by rotation of the nut . 18Figure 8 Tightening of the assembly by rotation of the bolt head . 19Figure 9 Checking the indicator gap (example with six protrusions) 20Tables Table 1 Systems of bolt/nut/washer assemblies 5Table 2 Dimensions of compressible washe

20、r-type direct tension indicator . 8Table 3 Specifications and reference standards 9Table 4 Indicator compression loads at appropriate gap (see Table 9) . 10Table 5 Support block dimensions 12Table 6 Dimensions of nut face washers 15Table 7 Dimensions of bolt face washers . 16Table 8 Specifications a

21、nd reference standards 17Table 9 Thickness of the feeler gauge . 19Table 10 Feeler gauge requirements . 20BS EN 14399-9:2009EN 14399-9:2009 (E) 4 Foreword This document (EN 14399-9:2009) has been prepared by Technical Committee CEN/TC 185 “Fasteners”, the secretariat of which is held by DIN. This Eu

22、ropean Standard shall be given the status of a national standard, either by publication 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 t

23、he 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. EN 14399 consists of the following parts, under the general title High-strength structural bolting assemblies for preloading: Part 1: General requirement

24、s Part 2: Suitability test 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 an

25、d 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 preload According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imple

26、ment this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland

27、and the United Kingdom. BS EN 14399-9:2009EN 14399-9:2009 (E) 5 Introduction This document is part of EN 14399 parts 1 to 10 which specify high-strength structural bolting for preloading; this part belongs to both systems, HR and HV. Direct tension indicators (known formerly as load indicating washe

28、rs) used in conjunction with bolt and nut face washers are a load indicating device which are placed under the bolt head or under the nut. The direct tension indicators have protrusions on one face which compress under load and thus may be used to indicate the magnitude of the preload in the assembl

29、y. Direct tension indicators are only to be sold as part of a complete assembly that comprises bolts and nuts and that otherwise complies with EN 14399-3, -4, -7 or -8. The systems of bolt/nut/washer assemblies are described in Table 1. Table 1 Systems of bolt/nut/washer assemblies Bolt/nut/washer a

30、ssembly System HR Bolt/nut/washer assembly System HV General requirements EN 14399-1 Bolt/nut assembly EN 14399-3 or EN 14399-7 EN 14399-4 or EN 14399-8 Marking HR HV Property classes 8.8/8 or 8.8/10 10.9/10 10.9/10 Washers EN 14399-5 or EN 14399-6 EN 14399-5 or EN 14399-6 Marking H H Direct tension

31、 indicator EN 14399-9 Marking H8 H10 H10 Bolt/nut face washer EN 14399-9 Marking HB/HN HB/HN Suitability test for preloading EN 14399-2 EN 14399-2 Preloaded bolted assemblies are very sensitive to differences in manufacture and lubrication. Therefore it is important that the assembly is supplied by

32、one manufacturer who is always responsible for the function of the assembly. For the same reason it is important that hot dip galvanizing or other surface coatings of the assembly are under the control of one manufacturer. Beside the mechanical properties of the components, the functionality of the

33、assembly requires that the specified preload can be achieved when the average gap remaining after tightening (compressed protrusions) is less than the specified values in this standard, if the assembly is tightened with a suitable procedure. The test method given in this standard has been developed

34、to demonstrate the suitability of the components for preloading. BS EN 14399-9:2009EN 14399-9:2009 (E) 6 1 Scope This document specifies, together with EN 14399-1, the requirements for assemblies of high-strength structural bolts and nuts, with large width across flats, of system HR or HV, including

35、 the requirements for the general dimensions, tolerances, materials and performance for two grades, H8 and H10, of compressible washer-type direct tension indicators, nut face washers and bolt face washers suitable for preloaded joints. The assemblies include the nominal thread sizes M12 up to and i

36、ncluding M36 and property classes 8.8/8, 8.8/10 and 10.9/10. Bolt and nut assemblies to this document 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 system HR accord

37、ing to EN 14399-3 or by plastic deformation of the engaged threads for system HV according to EN 14399-4; also countersunk and fit bolts according to EN 14399-7 and -8 respectively. Bolt and nut assemblies conforming to this document may include washer(s) according to EN 14399-6 or to EN 14399-5 (un

38、der the nut only). The purpose of the direct tension indicators is to show that a defined preload is achieved in the bolt. The direct tension indicator can be used alone or with bolt face washers or nut face washers conforming to this standard. In either case it is essential that the direct tension

39、indicators are used as part of an assembly in accordance with EN 14399-1. To comply with EN 14399-1, it is essential that the assemblies are supplied by one manufacturer and include bolts, nuts, washers and direct tension indicators. NOTE 1 Attention is drawn to the importance of ensuring that the a

40、ssemblies are correctly used if satisfactory results are to be obtained. The test method for suitability for preloading is specified in EN 14399-2 and supplemented by Clause 5. Guidance on the use of compressible washer-type direct tension indicators is given in EN 1090-2. NOTE 2 Compressible washer

41、-type direct tension indicators are also known as load indicating washers. 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 referen

42、ced document (including any amendments) applies. EN 13811, Sherardizing Zinc diffusion coatings on ferrous products Specification EN 14399-1:2005, High-strength structural bolting assemblies for preloading Part 1: General requirements EN 14399-2:2005, High-strength structural bolting assemblies for

43、preloading Part 2: Suitability test for preloading 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 4: System HV Hexagon bolt and nut assemblies 1) fubi

44、s the nominal tensile strength (Rm) and Asis the tensile stress area of the bolt. BS EN 14399-9:2009EN 14399-9:2009 (E) 7 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

45、chamfered washers EN 14399-7, High-strength structural bolting assemblies 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 ISO 3269:2000, Fasteners

46、 Acceptance inspection (ISO 3269:2000) EN ISO 4759-3, Tolerances for fasteners Part 3: Plain washers for bolts, screws and nuts Product grades A and C (ISO 4759-3:2000) EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method (ISO 6507-1:2005) EN ISO 6508-1, Metallic materials Roc

47、kwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) (ISO 6508-1:2005) EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system (ISO 7500-1:20

48、04) 3 Direct tension indicators 3.1 Dimensions Before installation, the dimensions and tolerances of compressible washer-type direct tension indicators shall be as given in Table 2 and Figure 1. The size and number of protrusions on the direct tension indicator shall be sufficient to meet the performance requirements of 3.3 and their number shall be not less than four. The protrusions on a direct tension indicator shall be spaced at equal angular intervals. The shape of the protrusions is at the discretion of the manufacturer. BS EN 14399-9:2009EN 14399-9:2009 (E) 8 Key d1 Internal diameter