AMS releases solar powered thermal mass flow meters for remote fracking well site flare gas measurement

AMS Instrumentation and Calibration announces the launch of solar
powered thermal mass flow meters designed for use in flare gas measurement applications
at remote fracking well sites.

The new constant power technology thermal mass flow meters from Fluid
Components International (FCI) are designed to assist engineers with gas flow
metering at remote oil/gas production sites having unreliable power supply. Oil
and gas production field engineers are required to monitor and report on
emitted (flared) gases at these remote sites to meet local and global
environmental compliance requirements.

FCI’s constant power technology meters require very low power compared
to the alternative constant deltaT (variable power) technology, making them ideal
for use with a solar panel.

A recent application used a solar power-able FCI Model ST75V flow meter with
built-in Vortab flow conditioner to provide direct mass flow measurement of the
waste gas being burned at the site. A result of the separation of hydrocarbon
fluids at the well head, the waste gas was unsuitable for commercial use and was
being sent to a tank with a flare unit to be burned off as necessary. Comprising
of a mixed combination of flammable gases including methane, ethane, propane,
isobutene, butane, isopentane, pentane and hexane as well as trace amounts of
nitrogen and carbon dioxide, this waste gas also contained moisture. The gas
line from the tank to the flare was a small 1-inch diameter pipe and had a very
limited straight-run.

FCI’s flow meter with its no-moving parts thermal dispersion mass flow
sensing element was found suitable for the application. The FCI Model ST75V flow
meter with built-in Vortab flow conditioner provides direct mass flow
measurement of the gas at this site without the additional equipment required by
other flow measurement technologies.

Key features and benefits of FCI Model ST75V flow meter include a non-clogging
sensor design operating over a wide flow range with low-flow sensitivity; integral
Vortab flow conditioner providing a fully developed flow profile in just seven
total pipe diameters; compatibility with solar power systems that provide 24Vdc
power without any special modifications; rugged NEMA 4X/IP67 rated enclosure
ideal for dirty oil and gas production field installations; inline-style flow
body providing accuracy to ±1% of reading with flow ranges from 0.04 to 560
SCFM (0.07 to 950 NCMH), depending on pipe size, and repeatability of ±0.5
percent of reading; and suitability for line sizes from 0.25 to 2 inches (6 to
51 mm) in diameter.

The ST75V flow
meter’s flow element is constructed with a 316L stainless steel body and
Hastelloy C-22 thermowell sensors to resist corrosion. The instrument is
approved for use in hazardous/explosive oil/gas production environments and
carries global approvals that include: FM/CSA, Class 1, Div 1, Groups B, C, D;
Class 1, Div II, Groups A-D, ATEX/IECEx Zone 1, II 2 G Ex d IIC T6 …T3, II 2 D
Ex tD A21 IP67 T90¡C…T300¡C.

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