BS EN 60534-8-1:2005

1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Method A (external sound pressure measurement)
  5.1 Test system
      5.1.1 Pressure regulating devices
      5.1.2 Test specimen
      5.1.3 Test section piping
      5.1.4 Pressure taps
      5.1.5 Acoustic environment
      5.1.6 Instrumentation
  5.2 Test procedure
      5.2.1 Test fluids
      5.2.2 Sound level sensor position
      5.2.3 Blow-down test limitations
      5.2.4 Test data accuracy
      5.2.5 Test data
      5.2.6 Accuracy
  5.3 Data evaluation
6 Method B (internal sound pressure measurement)
  6.1 Test system
       6.1.1 Pressure regulating devices
       6.1.2 Test specimen
       6.1.3 Test section piping
       6.1.4 Pressure taps
       6.1.5 Number of measuring points
       6.1.6 Instrumentation for noise measurement
   6.2 Testing procedures
       6.2.1 Test fluid
       6.2.2 Fluid velocity
       6.2.3 Background noise
       6.2.4 Sound level sensor position
       6.2.5 Blow-down test limitations
       6.2.6 Test data accuracy
       6.2.7 Test data
       6.2.8 Accuracy
   6.3 Data evaluation
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

Describes the equipment, methods, and procedures for obtaining laboratory measurements of sound pressure levels radiated by control valves and/or associated piping configurations, including fixed restrictions, through which compressible fluids are passing.

defines equipment, methods, and procedures for obtaining laboratory measurements of sound pressure levels radiated by control valves and/or associated piping configurations, including fixed restrictions, through which compressible fluids are passing. Control valves discharging to atmosphere are excluded from this standard