EN 13181:2001

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and subscripts
   4.1 Symbols
   4.2 Subscripts
5 Instrumentation
   5.1 Air flow rate measurement
   5.2 Pressure measurement
   5.3 Temperature measurement
   5.4 Weighing equipment
   5.5 Timers
6 Test apparatus
   6.1 Aerodynamic sand trap louvre test facility
   6.2 Sand injector equipment
   6.3 Aerodynamic measurement section
7 Grading of the test sand
8 Pre-test of sand distribution for each test series
9 Test methods
   9.1 Sand rejection
   9.2 Entry loss coefficient/pressure loss
Annex A (informative) Typical test results and calculation
        examples
   A.1 Entry loss coefficient
   A.2 Sand trap louvre effectiveness
        A.2.1 Recording results
        A.2.2 Rating

This European Standard specifies a method for measuring the sand rejection efficiency of sand trap louvres subject to simulated sand and with inlet air flow through the louvre under test. The Standard considers a 1000 mm ´ 1000 mm section of sand trap louvre, or the nearest possible blade increment, for evaluation purposes.The purpose of the tests incorporated in this European Standard is as follows:a) Sand Rejection EffectivenessTo establish the sand rejection effectiveness when subjected to various air flow rates through the assembly.b) Entry loss coefficient/Pressure requirementsTo establish the air pressure loss through the sand trap louvre at various air flow rates and by calculation Discharge Loss Coefficient.