scope:

This standard defines equipment, methods, and procedures for obtaining laboratory measurements of airborne sound pressure levels radiated by control valvbes and/or associated piping configurations, including fixed restrictions, through which compressible fluids are passing. To provide a method of testing the noise generating characteristics of control valves. A uniform method of measuring the radiated noise from the valve and associated test piping allows a comparison of various measuring results which is beneficial for both user and manufacturer. The noise criteria are expressed by determining the sound pressure level (SPL) of the valve under consideration. The determination and use of the sound power level are not practical and therefore are beyond the scope of this standard. The noise characteristics to be determined are useful for the following reasons: 1) to compare the performance of different valves; 2) to plan measures for noise abatement.