Orifice Flowmeter Rangeability Principle And Installation Of Segmental Just Measure It

Author Dalbo 13 Mar 2026

The orifice flow meter only allows 3:1 rangeability to maintain accuracy The performance of the orifice meter system just like other differential pressure flow meters depend on the precision of the orifice plate and the accuracy. It is the most used flow measurement device in oil & gas plants.

Standard Orifice Plate vs. Balanced Flow Meter: What's the Difference

Orifice Flowmeter Rangeability Principle And Installation Of Segmental Just Measure It

In evaluating the accuracy of orifice flow, first consider transmitter accuracy and rangeability Accuracy and rangeability of orifice metering systems Modern transmitters have a δp rangeability of up to 200:1, which equates to a flow range.

Turndown ratio (rangeability) can be used to compare flow measurement devices like orifices, venturi meters etc

An orifice plate meter has a practical turndown ratio of 3:1 This means that if an orifice meter with a design flow rate of 200,000 m³ per day is installed, the flow range that the meter can. However, orifice only allows 3:1 rangeability to maintain accuracy This means, if one wants to measure maximum flow of 10 mmscfd, then the minimum flow measurement that could be measured is only 3.3.