Measuring Flare Gas Flow Using Thermal Mass Flow Meters

 In Measurement and Control of Natural Gas

Recently Sage Metering released a white paper discussing an improved method for measuring flare gas flow using thermal mass flow meters. The new paper explores flow meter challenges and using thermal flow meters in applications of biogas, landfill gas and natural gas, and even discusses refineries and chemical plants.

Flare Gas Measurement Challenges

Thermal mass flow meters have been touted as an effective instrument to measure flare gas to comply with environmental regulations. What most manufacturers do not point out are the inherent challenges with measuring flare gas. In fact, flare gas measurement is one of the most challenging flow measurement applications. One of the points of the Sage white paper, “Flare Gas Measurement Using Thermal Mass Flow Meters,” is that thermal mass flowmeters are not appropriate in all flare applications.

The paper explores the inherent challenges needed to be overcome when measuring flare gas. Those challenges range from varying gas composition, the presence of hydrogen, extreme flow rate variation, the demands to meet environmental calibration and accuracy regulations, requirements for hazardous location classification, and there are others.

Measuring Flare Gas Using Thermal Mass Flow Meters The Sage paper doesn’t suggest that the thermal mass flow meter is the end-all and best method for measuring flare gas. In fact, in some applications, such as emission measurement at oil refineries and chemical plants, it suggests that thermal meters are not effective because of the extreme variations in gas composition. They do, however, suggest that thermal meters can detect which operation is sending flow to the flare in these facilities.

Flare Measurement of Landfill Gas, Biogas, and Natural Gas

The new white paper discusses how in some flare measurement applications, such as landfill gas, biogas, natural gas, using thermal flow meters is an effective method and can save thousands of dollars versus the traditional approach with ultrasonic meters. There are other applications discussed in the paper, including natural gas processing and production, offshore platforms, crude oil extraction, and atmospheric storage tanks.

New Engineering Approach with Sage Thermal Mass Flow Meters

Sage also offers a unique approach in their paper for using thermal mass meters to measure flare gas flow applications at refineries and chemical plants, when the gas composition is known.

This paper discusses the challenges associated with flare gas measurement, and clearly outlines applications where thermal flow meters can perform well while simultaneously saving the operator substantial expenses.

To read the free Sage Metering white paper in its entirety, visit Flare Gas Measurement Using Thermal Mass Flow Meters.

Manufacturer’s Representative and Distributor for Sage Metering

Linc Energy is a manufacturer’s representative and distributor for Sage Metering in Colorado, Idaho, New Mexico Utah and Wyoming.



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