SIST EN 14399-9:2009
(Main)High-strength structural bolting assemblies for preloading - Part 9: System HR or HV - Direct tension indicators for bolt and nut assemblies
High-strength structural bolting assemblies for preloading - Part 9: System HR or HV - Direct tension indicators for bolt and nut assemblies
This document specifies, together with EN 14399 1, the requirements for assemblies of high-strength structural bolts and nuts of system HR or HV and 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 with large widths across flats, thread sizes M12 to 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 × As ) according to EN 1993 1 8 (Eurocode 3) and to obtain ductility predominantly by plastic elongation of the bolt for system 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 a washer according to EN 14399 6 or to EN 14399 5 (under the nut only).
The purpose of indicators is to show that a defined preload is achieved in the bolt and it can be used alone or else with bolt face washers or nut face washers conforming to this standard. In either case the indicators shall be used as part of an assembly in accordance with EN 14399 1.
To comply with EN 14399 1, the assemblies to be supplied by one manufacturer include bolts, nuts, washers and indicators.
NOTE 1 Attention is drawn to the importance of ensuring that the bolts 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 prEN 1090 2.
NOTE 2 Compressible washer-type direct tension indicators are also known as load indicating washers.
Hochfeste planmäßig vorspannbare Schraubenverbindungen für den Metallbau - Teil 9: System HR oder HV - Direkte Kraftanzeiger für Garnituren aus Schrauben und Muttern
Dieses Dokument legt gemeinsam mit EN 14399-1 die Anforderungen an Garnituren aus hochfesten
Schrauben und Muttern für den Metallbau mit großer Schlüsselweite der Systeme HR oder HV einschließlich
der Anforderungen an die allgemeinen Maße, Toleranzen, Werkstoffe und die Leistungsmerkmale für zwei
Klassen, H8 und H10, von verformbaren scheibenförmigen direkten Kraftanzeigern sowie mutter- und
schraubenkopfseitigen Scheiben fest, die für vorgespannte Verbindungen geeignet sind. Die Garnituren
umfassen die Gewindenenngrößen M12 bis M36 und die Festigkeitsklassen 8.8/8, 8.8/10 und 10.9/10.
Die Garnituren aus Schrauben und Muttern nach diesem Dokument wurden so gestaltet, dass sie ein Vorspannen
auf mindestens 0,7 fub × As
1) in Übereinstimmung mit EN 1993-1-8 (Eurocode 3) zulassen und dass
sie ihr Verformungsvermögen vorwiegend durch plastische Verlängerung der Schraube für das System HR
nach EN 14399-3 oder durch plastische Verformung der gepaarten Gewinde für das System HV nach
EN 14399-4 erreichen; ebenso Senkkopf- und Passschrauben nach EN 14399-7 bzw. -8.
Garnituren aus Schrauben und Muttern nach diesem Dokument können Scheibe(n) nach EN 14399-6 oder
EN 14399-5 (nur unter der Mutter) enthalten.
Der Zweck des direkten Kraftanzeigers besteht darin, zu zeigen, dass in der Schraube eine bestimmte
Vorspannung erreicht wird. Der direkte Kraftanzeiger kann allein oder mit schraubenkopf- oder mutterseitigen
Scheiben nach dieser Norm angewendet werden. In beiden Fällen sind die direkten Kraftanzeiger als Teil
einer Garnitur nach EN 14399-1 einzusetzen.
Um der EN 14399-1 zu entsprechen, müssen die durch einen Hersteller gelieferten Garnituren Schrauben,
Muttern, Scheiben und direkte Kraftanzeiger umfassen.
ANMERKUNG 1 Es wird darauf hingewiesen, dass zufriedenstellende Ergebnisse nur dann erzielt werden, wenn
sichergestellt ist, dass die Garnituren sachgerecht eingesetzt werden.
Boulonnerie de construction métallique à haute résistance apte à la précontrainte - Partie 9 : Système HR ou HV - Rondelles indicatrices de précontrainte pour les boulons
Le présent document spécifie, avec l'EN 14399-1, les exigences relatives aux ensembles vis et écrous de
construction à haute résistance, à surplats de série large, d'un système HR ou HV, y compris les exigences
relatives aux dimensions générales, aux tolérances, aux matériaux et aux performances de deux qualités (H8
et H10) de rondelles indicatrices de précontrainte compressibles, de rondelles côté écrou et de rondelles côté
tête de vis utilisables dans les ensembles précontraints. Les ensembles comprennent les diamètres de
filetage nominaux M12 à M36 inclus et les classes de qualité 8.8/8, 8.8/10 et 10.9/10.
Les ensembles vis et écrou du présent document ont été conçus pour permettre une précontrainte
d'au moins 0,7 fub × As
1 ) conformément à l'EN 1993-1-8:2005 (Eurocode 3) et pour obtenir la ductilité
principalement par allongement plastique de la vis (système HR) conformément à l'EN 14399-3, déformation
plastique des filets en prise (système HV) conformément à l'EN 14399-4. Des boulons fraisés et ajustés
conformément à l'EN 14399-7 et -8 respectivement sont permis.
Les ensembles vis, écrou et rondelles conformes au présent document peuvent inclure une ou plusieurs
rondelles conformes à l’EN 14399-6 ou à l’EN 14399-5 (sous l’écrou uniquement).
Ces rondelles indicatrices de précontrainte visent à montrer que la vis fait l'objet d'une précontrainte définie.
La rondelle indicatrice de précontrainte peut être utilisée seule ou avec des rondelles côté tête de vis ou côté
écrou conformément à la présente norme. Dans tous les cas, il est essentiel que les rondelles indicatrices de
précontrainte soient utilisées dans le cadre d'un ensemble conformément à l'EN 14399-1.
Pour être conformes à l'EN 14399-1, il est essentiel que les ensembles soient fournis par un seul fabricant et
comprennent les vis, les écrous, les rondelles et les rondelles indicatrices de précontrainte.
Visokotrdnostne vijačne zveze za prednapetje - 9. del: Sistem HR ali HV - Indikatorske podložke privitja za zveze vijakov in matic
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Hochfeste planmäßig vorspannbare Schraubenverbindungen für den Metallbau - Teil 9: System HR oder HV - Direkte Kraftanzeiger für Garnituren aus Schrauben und MutternBoulonnerie de construction métallique à haute résistance apte à la précontrainte - Partie 9 : Système HR ou HV - Rondelles indicatrices de précontrainte pour les boulonsHigh-strength structural bolting assemblies for preloading - Part 9: System HR or HV - Direct tension indicators for bolt and nut assemblies21.060.20MaticeNuts21.060.10Sorniki, vijaki, stebelni vijakiBolts, screws, studsICS:Ta slovenski standard je istoveten z:EN 14399-9:2009SIST EN 14399-9:2009en,fr,de01-junij-2009SIST EN 14399-9:2009SLOVENSKI
STANDARD
SIST EN 14399-9:2009
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14399-9March 2009ICS 21.060.01 English VersionHigh-strength structural bolting assemblies for preloading - Part9: System HR or HV - Direct tension indicators for bolt and nutassembliesBoulonnerie de construction métallique à haute résistanceapte à la précontrainte - Partie 9 : Système HR ou HV -Rondelles indicatrices de précontrainte pour les boulonsHochfeste planmäßig vorspannbareSchraubenverbindungen für den Metallbau - Teil 9: SystemHR oder HV - Direkte Kraftanzeiger für 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 EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such 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 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, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14399-9:2009: ESIST EN 14399-9:2009
EN 14399-9:2009 (E) 2 Contents Page Foreword .4Introduction .51Scope .62Normative references .63Direct tension indicators .73.1Dimensions .73.2Specifications and reference standards .93.3Performance test of direct tension indicators .93.4Test method for measuring compression loads (all finishes) on direct tension indicators . 103.4.1General . 103.4.2Testing apparatus . 103.4.3Compression loading system . 103.4.4Support blocks . 103.4.5Bearing blocks . 123.4.6Calibration . 123.4.7Test Procedure . 123.5Marking of the direct tension indicator . 143.6Designation of the direct tension indicator . 144Nut face washers and bolt face washers . 154.1Dimensions . 154.2Specifications and reference standards for nut face washers and bolt face washers . 164.3Marking . 174.3.1Nut face washers . 174.3.2Bolt face washers . 174.4Designation . 174.4.1Nut face washers . 174.4.2Bolt face washers . 185Functional characteristics . 185.1Assemblies . 185.2Functional characteristics of direct tension indicators in the assembly. 195.3Functional characteristics of the bolt/nut/washer(s)/direct tension indicator assembly . 205.3.1General . 205.3.2Test procedure . 20Annex A (informative)
Special testing conditions and procedures . 22Bibliography . 23 SIST EN 14399-9:2009
EN 14399-9:2009 (E) 3 Figures Figure 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 washers . 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) . 20 Tables Table 1 — Systems of bolt/nut/washer assemblies . 5Table 2 — Dimensions of compressible washer-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 and reference standards . 17Table 9 — Thickness of the feeler gauge . 19Table 10 — Feeler gauge requirements . 20 SIST EN 14399-9:2009
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. This 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 some 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 requirements 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 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 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, Switzerland and the United Kingdom. SIST EN 14399-9:2009
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 indicating 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 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/nut/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 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 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 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 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 to demonstrate the suitability of the components for preloading. SIST EN 14399-9:2009
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 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 M12 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 system 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 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 direct 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 ensuring 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 Compressible 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 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 assemblies 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 assemblies
1) fub is the nominal tensile strength (Rm) and As is the tensile stress area of the bolt. SIST EN 14399-9:2009
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 preloading – 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 3269:2000, 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, Metallic 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 system (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 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. SIST EN 14399-9:2009
EN 14399-9:2009 (E) 8
Key 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
d1 External diameter
d2 Material thickness h1 Height over protrusions h2 Height of protrusions h3 Protrusion tangential diameter d3 Protrusion internal diameter d4 min. max. min. max. min. max. min. max. min. M12 12,75 12,85 26,0 32,5 2,50 5,50 0,80 20 13,85 M16 16,75 16,85 35,0 36,8 3,00 6,00 0,80 25 17,85 M20 20,95 21,05 41,0 46,0 3,50 6,50 0,80 29 22,05 M22 23,05 23,15 46,5 50,6 4,00 7,00 0,80 33 24,15 M24 25,15 25,25 50,0 55,2 4,00 7,00 0,80 38 26,25 M27 28,30 28,40 54,0 62,1 4
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