ISA 75.17 : 1989

1 Scope
2 Limitations
3 Nomenclature
4 Pressures and Pressure Ratios
5 Regime Definition
6 Preliminary Calculations
7 Regime I (Subsonic Flow)
8 Common equations for sonic and above
9 Regime II
10 Regime III
11 Regime IV
12 Regime V
13 Noise Calculations
14 Calculations Flow Chart
Annex A References
Annex B Example

Control Value Aerodynamic Noise Prediction, provides a method for predicting aerodynamic noise generated by control valves handling compressible fluids, based on fundamental principles of acoustics and fluid mechanics. This standard addresses different flow regimes influenced by pressure conditions and sonic effects, offering equations to calculate sound power, acoustic efficiency, peak frequencies and transmission loss through pipe walls. Applicable to a variety of common valve types, this methodology integrates with existing valve sizing data and includes both metric and customary units to support diverse engineering environments. An example calculation demonstrates practical application, making it accessible for engineers involved in noise assessment and control within piping systems.