C288 – ISO 5167-5:2016 Cone Calculations


This calculation can be set to calculate the flow rate through an cone based metering system, the differential pressure setting of the metering system or the cone size to use for specified flowing conditions using the ISO 5167-5:2016 standard.


ISO 5167-5:2016 – Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full – Part 5:Cone meters

ISO TR9464 – Guidelines for the use of ISO 5167

Kelton calculation reference C288

FLOCALC calculation reference F079

KIMS calculation reference K242

Kelton calculation reference C276 – Cone Meter Mass Flow Calculation

Kelton calculation reference C273 – ISO 5167 Differential Pressure Calculations

Kelton calculation reference C274 – ISO 5167 Sizing Calculation

Kelton calculation reference C261 – Gas Flowrate Conversion from Qm

Kelton calculation reference C262 – Liquid Flowrate Conversion


Solve For

  • Flow rate
  • Cone diameter
  • Differential pressure

This option is used to select what kind of calculation the user wishes to implement.

The rest of the options that can be encountered in this calculation can be found in the calculations referenced above.


Mass Flow Rate

The mass flow rate is calculated using the formula shown in C276. Further flow rate outputs, if required, are calculated using one of the flow rate converters using this value of mass flow rate.

Cone Diameter

The cone diameter is calculated according to the process described in C274.

Differential Pressure

The differential pressure is solved as described in C273.