ONORM EN 10319-2 : 2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and designations
5 Principle
6 Apparatus
   6.1 Bolted joint model device
       6.1.1 General
       6.1.2 Bolted joint model A
       6.1.3 Bolted joint model bolt B
   6.2 Extension measuring device
       6.2.1 Measuring device for the overall length
       6.2.2 Measuring device for the strain
   6.3 Heating device
       6.3.1 General purpose
       6.3.2 Permissible temperature deviations
       6.3.3 Temperature measurement
       6.3.4 Calibration of the thermocouples and temperature
             measuring system
7 Shape, dimensions and preparation of bolted joint models
   7.1 Shape and dimensions
   7.2 Preparation
   7.3 Determination of the original cross-sectional area
8 Test procedure
   8.1 General
   8.2 Tensioning of the bolt
       8.2.1 General
       8.2.2 Tensioning with bolted joint model A
       8.2.3 Tensioning with bolted joint model B
   8.3 Determination of the initial stress of the bolt
   8.4 Heating, holding at temperature and cooling of the bolted
       joint model
   8.5 Determination of the residual elastic strain
       8.5.1 General
       8.5.2 Unloading the bolt
       8.5.3 Residual elastic strain with bolted joint model A
       8.5.4 Residual elastic strain with bolted joint model B
       8.5.5 Determination of the residual stress
9 Accuracy of the results
   9.1 Expression of the results
   9.2 Uncertainty
10 Test report
Annex A (informative) Information concerning different types of
                      thermocouples
Annex B (informative) Information concerning methods of calibration
                      of thermocouples
Bibliography

Describes the test method for determining the stress relaxation of bolts tensioned in bolted joint models subjected throughout the test to overall constant strain and constant temperature conditions.