UKTN TNflow v4.0

TNflow is addressing the needs of engineers dealing with fluid flow measurement by means of pressure differential devices. TNflow may be used to calculate:

• primary device diameter (bore diameter) for declared full scale flowrate and related value of differential pressure;
• differential pressure for declared bore diameter and flowrate;
• flowrate for declared bore diameter and differential pressure.

Any of the above calculations is supplemanted by:

• diameters corrections for thermal expansion;
• bounds of measurement range calculations;
• upper limit of upstream pipe roughness calculations;
• upper limit of sharp edge radius calculations;
• required upstream and downstream straight lengths calculations;
• uncertainty analysis of flowrate measurement at a single point and in the entire measurement range;
• bias "linear scale" error analysis.