DIN EN 14399-9-2009 High-strength structural bolting assemblies for preloading - Part 9 System HR or HV - Direct tension indicators for bolt and nut assemblies English version of D.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!$XEi“1533470www

2、.din.deDDIN EN 14399-9High-strength structural bolting assemblies for preloading Part 9: System HR or HV Direct tension indicators for bolt and nut assembliesEnglish version of DIN EN 14399-9:2009-07Hochfeste planmig vorspannbare Schraubenverbindungen fr den Metallbau Teil 9: System HR oder HV Direk

3、te Kraftanzeiger fr Garnituren aus Schrauben und MutternEnglische Fassung DIN EN 14399-9:2009-07www.beuth.deDocument comprises pages25DIN EN 14399-9:2009-07 National foreword This standard has been prepared by Technical Committee CEN/TC 185 “Fasteners” (Secretariat: DIN, Germany). The responsible Ge

4、rman 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. National Annex NA (informative) Bibliography DIN ISO 2859-1, Sampling procedures for inspection b

5、y attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14399-9 March 2009 ICS 21.060.01 English Version High-strength structural bolting assemblies for preloading Part 9: System HR or HV Direct

6、tension indicators for bolt and nut assemblies Boulonnerie de construction mtallique haute rsistance apte la prcontrainte Partie 9 : Systme HR ou HV Rondelles indicatrices de prcontrainte pour les boulons Hochfeste planmig vorspannbare Schraubenverbindungen fr den Metallbau Teil 9: System HR oder HV

7、 Direkte Kraftanzeiger fr Garnituren aus Schrauben und Muttern This 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 w

8、ithout any 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 langu

9、age made by translationunder 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

10、, France,Germany, 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 KOMIT

11、EE FR NORMUNG Management 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: EEN 14399-9:2009 (E) 2 Contents Page Foreword 4Introduction .51 Scope 62 Normative references 63

12、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 Compression

13、 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 referenc

14、e 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 tension in

15、dicators 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 . 23DIN EN 14399-9:2009-07 EN 14399-9:2009 (E) 3 Figures Fig

16、ure 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 wash

17、ers 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 wash

18、er-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

19、and reference standards 17Table 9 Thickness of the feeler gauge . 19Table 10 Feeler gauge requirements . 20DIN EN 14399-9:2009-07 EN 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. T

20、his 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 September 2009, and conflicting national standards shall be withdrawn at the latest by September 2011. Attention is drawn to the possibility that som

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

22、rements 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 b

23、olt 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 preload According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to

24、 implement 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, Switze

25、rland and the United Kingdom. DIN EN 14399-9:2009-07 EN 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 indic

26、ating washers) 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

27、the assembly. 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/n

28、ut/washer assembly 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 HVProperty 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 Dire

29、ct tension indicator EN 14399-9 Marking H8 H10 H10 Bolt/nut face washer EN 14399-9 Marking HB/HN HB/HNSuitability 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 sup

30、plied by 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 functionalit

31、y of the 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 d

32、eveloped to demonstrate the suitability of the components for preloading. DIN EN 14399-9:2009-07 EN 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

33、 HV, including 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 M

34、12 up to and including 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 sy

35、stem HR according 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

36、EN 14399-5 (under 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 d

37、irect tension 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 ensur

38、ing that the assemblies 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 Compr

39、essible washer-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

40、of the referenced 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 a

41、ssemblies for 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 asse

42、mblies 1) fubis the nominal tensile strength (Rm) and Asis the tensile stress area of the bolt. DIN EN 14399-9:2009-07 EN 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 preloa

43、ding Part 6: Plain 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 3

44、269:2000, Fasteners 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, Met

45、allic materials Rockwell 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 sy

46、stem (ISO 7500-1:2004) 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

47、 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. DIN EN 14399-9:2009-07 EN 14399-9:2009 (E) 8 Key

48、 d1 Internal diameter d2 External diameter d3 Protrusion tangential diameter d4 Protrusion internal diameter h1 Material thickness h2 Height over protrusions h3 Height of protrusions Figure 1 Dimensions of compressible washer-type direct tension indicator (example with six protrusions) Table 2 Dimensions of compressible washer-type direct tension indicator Dimensions in millimetresFor use with bolts of designation Internal diameter d1External diameter d2Material thicknessh1Height over protrusionsh2Height of protrusionsh3Protrusion tangential diameter d3Protrusion in