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Scope:This standard defines equipment, methods, and procedures for the laboratory testing and measurement of airborne sound radiated by a compressible fluid flowing through a control valve and its associated piping, including fixed-flow restrictions. The test may be conducted under any conditions mutually agreed upon by the user and the manufacturer. Although this standard is designed for measurement of the noise radiated from the piping downstream of the valve, other test variations are optional, including the use of insulation and nonstandard piping. Applications of this standard to control valves discharging directly to atmosphere are excluded from this standard. Purpose:The purpose of this standard is to provide a procedure for testing, measuring, and reporting the aerodynamic noise-generating characteristics of a control valve and its associated piping.
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