Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Test installation
4.1 General
4.2 Test tubes
4.3 Measuring equipments
4.4 Test fluid
5 Test procedure
5.1 Test conditions
5.2 Pressure loss in test tubes
5.3 Test of valve
6 Calculation
6.1 Determination of the valve pressure loss
6.2 Calculation of coefficients
6.3 Uncertainties
7 Test report
7.1 Valve data
7.2 Test data
7.3 Test result
Annex A (informative) Suitable dimensions for new test tubes
Annex B (informative) Nature of a flow and physical phenomena
occurring when a flow passes through a
valve
Annex C (informative) Test result uncertainties