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Calculation of the internal diameter, differential pressure, volumetric flow and mass flow rate.

Differential Pressure Flowmeter

Supported flow elements:

Orifices
Nozzles
Venturi
Averaging pitot tubes
Wedge flow meter 
Cone meter 
Integral flow orifice assembly
Manufacturer dependent special designs 

Supported calculation bases:

ISO 5167 (2003, 1998, 1995, 1980)
ISO 5167-3 (2020) 
ISO 5167-5 (2016)
ISO 5167-6 (2019) 
ISO 5168 (2005) 
ISO/TR 9464 (2008) 
ISO/TR 15377 (2018, 2007) 
ISO 9300 (2005)
ASME MFC-3M (2017)
ASME MFC-7 (2016, 1987-R2014)
ASME MFC-14M (2003)
ASME PTC 6 (2004)
ASME PTC 19.5 (2004)
AGA 3 / API MPMS 14.3 (2013, 2003)
GB/T 2624 (2006) 
VDI/VDE 2041 (1991)
R. W. Miller, Flow Measurement Engineering Handbook (1996)

  • Clear summary of all limitations of use
  • Improved stress calculation for orifices (ASME 31.3/AD 2000/ISO 5167 etc.) 
  • Clear arrangement of the required inlet and outlet sections
  • Extended measurement uncertainty calculation according to ISO 5168 Sensitivity coefficients 
  • Calculation of segmental orifices with carrier rings 
  • Calculation of rectangular Venturi nozzles
  • Calculation of devices with drain holes
  • Calculations of pitot tubes with selection from an extensible equipment database
  • Calculations also for humid gases and non-standard differential pressure transmitters

Restriction orifice plates

  • Calculation of the internal diameter, differential pressure, volumetric flow and mass flow rate
  • Support for single- and multi-hole orifices 
  • Calculation of multi-stage expansion (automatic and manual) 
  • Improved calculation method considering the length of the cylindrical orifice 
  • Improved stress calculation (ASME 31,3/AD 2000/ISO 5167 etc.) 
  • Revised forecast of choked-flow conditions
  • Calculation of the Vena Contracta and outlet conditions 
  • Support of liquids containing dissolved gas 
  • Calculation of the energy balance (power loss) and the sound pressure level
  • Enhanced noise prediction for restriction orifice plates by the adapted calculation according to IEC 60534-8-3 respectively IEC 60534-8-4. 
  • Orifice plates with drain holes can be calculated.
  • The range of validity had been enhanced to β > 0,75.