Standard

NS-EN ISO 16911-1:2013

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Abstract

This European Standard describes a manual method for determining the axial velocity and volumetric flow of gas streams within ducts and stacks emitting to air. This European Standard describes the Standard Method (SM) for periodic monitoring and for calibration of automated flow monitoring systems permanently installed on a stack which can be used as reference method. This standard provides a method for the use of differential pressure devices (S / L and 3D Pitot tubes). It also provides an alternative method based on tracer gas injection, which can be used to provide routine calibration for automated flow-monitoring systems. Another alternative method, based on calculation is also described. The standard provides guidance on when these alternative methods may be used. This standard requires all flow measurements to have demonstrable metrological traceability to national or international primary standards. To be used as a SM, the user shall demonstrate that the performance characteristics of the method are equal to or better than the performance criteria defined in this European Standard and that the overall uncertainty of the method, expressed with a level of confidence of 95%, is less than 2% of the measured flow rate or 1 m/s [note – this uncertainty might be higher - and will be evaluated following the validation studies], whichever is the greater. ( ** note for GHG trading need <2.5% in measured mass emission rate). Alternative methods to this SM may be used provided that the user can demonstrate equivalence, based on the principles of Technical Specification CEN/TS 14793. This standard method (and the alternative methods defined within) has been evaluated during field tests on waste incineration and large combustion installations.

Document information

  • Standard from SN
  • Published:
  • Edition: 1
  • Version: 1
  • Document type: NAT
  • ICS 13.040.40
  • National Committee SN/K 136

Legal references

EU law: 2000/76/EC, 2001/80/EC

Product Relations

  • Adopted from: EN ISO 16911-1:2013 , 0