Precession vortex flowmeter measurement of natural gas three points for attention
2021-04-30
The precession vortex flowmeter is widely used. Next, we briefly introduce the requirements of the precession vortex flowmeter for measuring natural gas flow conditions, the installation requirements of the flowmeter and the matters that should be paid attention to in the installation and use of the flowmeter.
1. Requirements for air flow conditions
(1) The measured gas should be a single-phase, continuous round tube flow through the pipeline.
(2) Before the gas flows through the flowmeter, its flow rate must be parallel to the pipeline axis, and there must be no vortex flow.
(3) The air flow should be subsonic and non-pulsating, and its flow rate changes slowly with time.
2. the installation requirements of the flow meter
Precession vortex flowmeter does not have too many special requirements for process installation and use environment, but any kind of flow measuring instrument has such a common, That is, as far as possible to avoid vibration and high temperature environment with the flow state interference elements (such as compressors, separators, pressure regulator, small head and manifold, elbow, etc.), keep the instrument front and rear straight pipe wall smooth and straight, to ensure that the measured medium is clean single-phase fluid.
3. flowmeter installation and use should pay attention to matters
Precession vortex flowmeter without mechanical moving parts, small size, corrosion resistance, stable performance; It can directly display the working pressure, temperature, flow rate and gas volume under standard state of the medium; With the advantages of wide measuring range and small measuring error, it has been widely used in production measurement of oil and gas Wells and sales measurement of natural gas. In the field application for many years, the flowmeter has gradually become a common measuring instrument for small and medium-sized gas measurement.
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