Technical Data Sheet Società Bulloneria Europea S.p.A.
High-strength structural bolting for preloading System HR and HV – Hexagon bolt, nut and washers assemblies
Doc. N.:
090710
Rev. n.:
01
Data:
12/02/2015
Pagina
1
di
3
1. Applicable standard EN 14399-1 – High strength structural bolting for preloading – General Requirements EN 14399-2 – High strength structural bolting for preloading – Suitability test for preloading EN 14399-3 – High strength structural bolting for preloading – System HR – Hexagon bolt and nut assemblies EN 14399-4 – High strength structural bolting for preloading – System HV – Hexagon bolt and nut assemblies EN 14399-5 – High strength structural bolting for preloading – Plain washers EN 14399-6 – High strength structural bolting for preloading – Plain chamfered washers DIN 18800-7 – Steel Structures – Execution and constructor’s qualification
2. Systems of bolt/nut/washer assemblies
Bolt/nut assembly Marking Property classes Washers Marking Suitability test for preloading RIPRODUZIONE VIETATA
8.8 / 8
System HR
Sistem HV
EN 14399-3 HR
EN 14399-4 HV 10.9 / 10
10.9 / 10 EN 14399-5 or EN 14399-6 HR
HV
EN 14399-2 SBE/010/QUA REV01
Technical Data Sheet Società Bulloneria Europea S.p.A.
High-strength structural bolting for preloading System HR and HV – Hexagon bolt, nut and washers assemblies
Doc. N.:
090710
Rev. n.:
00
Data:
10/07/2009
Pagina
2
di
3
3. Specifications and reference standards Bolt Dimensions and tolerances Material Thread Mechanical properties
Tolerance Standard Property class
Standard Value Standard Normal Surface finish Hot dip galvanized Others Surface discontinuities Acceptability Impact strength
Nut
Washer
EN 14399-3 or EN 14399-4 Steel ISO 6g (a) ISO 6H or 6AZ ISO 261, ISO 965-2, ISO 965-5 8.8 or 10.9 (HR) 8 or 10 (HR) 10.9 (HV) 10 (HV) ISO 898-1 ISO 898-2 KV min = 27J at – 20°C ISO 148 – ISO 10045-1 As processed (b) ISO 10684 To be agreed ISO 6157-1 ISO 6157-2 ISO 3269
EN 14399-5 or EN 14399-6 n.a. Hardness 300-370 HV n.a.
(c)
(a) The tolerance class specified applies before hot-dip galvanizing. Hot-dip galvanized bolts are intended for assembly with oversize tapped nuts; (b) As processed means the normal finishing resulting from manufacture with a light coating of oil; (c) Parts shall be uniform and free from irregularities or detrimental defects. No protruding burrs shall appear on the washer.
4. Functional characteristics of the assembly (ref. EN 14399-2) k-class K0 K1 K2
RIPRODUZIONE VIETATA
Information NPD – No Performance Determined Range of individual test value ki Mean test value km Coefficient of variation of k-factor Vk
Requested values No requirements 0,10 ≤ ki ≤ 0,16 0,10 ≤ km ≤ 0,23 Vk ≤ 0,10
SBE/010/QUA REV01
Technical Data Sheet Società Bulloneria Europea S.p.A.
High-strength structural bolting for preloading System HR and HV – Hexagon bolt, nut and washers assemblies
Doc. N.:
090710
Rev. n.:
00
Data:
10/07/2009
Pagina
3
di
3
5. Tightening 5.1 Torque method The bolts shall be tightened using a torque wrench offering a suitable operating range. Hand or power operated wrenches may be used. Impact wrenches may be used for the first step of tightening for each bolt. a) a first tightening step: the wrench shall be set to a torque value of about 0,75 Mr,i with Mr,i = Mr,2 or Mr,test.This first step shall be completed for all bolts in one connection prior to commencement of the second step; b) a second tightening step: the wrench shall be set to a torque value of 1,10 Mr,i with Mr,i = Mr,2 or Mr,test. Diameter
Preload [kN] 59 81 110 134 172 212 247 321 393 486 572
M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36
Torque 1,1 Mr,i (Nm) 100 160 250 340 450 650 800 1250 1650 2200 2800
Km 0,129 0,129 0,129 0,128 0,119 0,127 0,123 0,131 0,127 0,125 0,124
Tightening torque Mr (=1,10 Mr,i) showed on nuts packaging has to be applied using calibrated torque wrenches with accuracy of ± 4% according to EN ISO 6789 by rotation of the nut; different tightening procedures have to be approved by experimental tightening tests under site conditions as specified in annex H of European Standard EN 1090-2: 2008+A1:2011.
5.1 Combined method Tightening by the combined method comprises two steps: a) a first tightening step, using a torque wrench offering a suitable operating range. The wrench shall be set to a torque value of about 0,75 Mr,i with Mr,i = Mr,2 or Mr,1 or Mr,test. This first step shall be completed for all bolts in one connection prior to commencement of the second step; b) a second tightening step in which a specified part turn is applied to the turned part of the assembly. The position of the nut relative to the bolt threads shall be marked after the first step, using a marking crayon or marking paint, so that the final rotation of the nut relative to the thread in this second step can be easily determined. Total nominal thickness "t" of parts to be connected (including all packs and washers) d = bolt diameter t<2d 2d_t<6d 6 d _ t _ 10 d
Further rotation to be applied, during the second step of tightening Degrees Part turn 60 90 120
1/6 1/4 1/3
NOTE Where the surface under the bolt head or nut (allowing for taper washers, if used) is not perpendicular to the bolt axis, the required angle of rotation should be determined by testing
RIPRODUZIONE VIETATA
SBE/010/QUA REV01
