How to correctly select natural gas turbine flowmeter
2021-06-07
Natural gas turbine flowmeter has a simple and firm structure, high measurement accuracy, good stability, can be used as a trade measuring instrument, the basic condition to ensure its measurement accuracy is the correct selection, in the selection of the correct field parameters, but also need to consider the operating environment and other aspects of factors, so as to select the appropriate model to ensure the correct measurement of natural gas. Ensure fair trade.
In the selection can be started from the following aspects.
(1) Caliber and flow range of natural gas turbine
The choice of flow range of turbine flowmeter has a great impact on its accuracy and service life, and each caliber flowmeter has a certain measuring range, and the choice of flowmeter caliber is also determined by the flow range. The principle of selecting the flow range is: the smaller flow when used shall not be lower than the smaller flow allowed by the instrument, and the larger flow when used shall not be higher than the larger flow allowed by the instrument. For discontinuous working occasions where the actual running time of the instrument does not exceed 8 hours per day, 1.3 times the maximum flow rate in actual use is selected as the upper limit of the flow range; For continuous working situations where the actual running time of the instrument is not less than 8 hours per day, 1.4 times the maximum flow rate in actual use is selected as the upper limit of the flow range. The lower limit flow rate of the instrument should be 0.8 times of the actual use of the smaller flow rate.
(2) Structure type of natural gas turbine flowmeter:
① The internal structure should choose the reverse thrust turbine flowmeter. Because the reverse thrust structure can make the impeller in a floating state within a certain flow range, there is no contact point in the axial direction, and there is no end friction and wear, which can extend the service life of the bearing.
② According to the type selection of pipeline connection, the flow meter has two ways of horizontal and vertical installation, and the horizontal installation and pipeline connection have flange connection, thread connection and clamp connection. Medium diameter flange connection; Small diameter and high pressure pipes are threaded; Clamp connection is only suitable for low pressure small diameter pipe; Vertical mounting only threaded connections.
③ Selection according to environmental conditions, considering the influence of temperature and humidity.
(3) Accuracy level
In general, the selection of turbine flowmeter is mainly due to its high accuracy, but the higher the accuracy of the flowmeter, the more sensitive to changes in the field conditions of use, so the choice of instrument accuracy should be careful, from an economic point of view. For the trade settlement instrument of the large-caliber gas transmission pipeline, it is cost-effective to invest more in the instrument, and for the occasion of small throughput, the medium precision level can be selected.
Share To：
News
- Why is the thermal gas mass flowmeter not affected by pressure strength and temperature?
- What to do when a thermal gas mass flow meter fails?
- How are thermal gas mass flow meters used? What are the applications?
- Under what circumstances is the gas measurement need to be regulated compensated vortex flowmeter
- Why Is The Aister Thermal Gas Mass Flowmeter So Popular ?
- Gas turbine flowmeter manufacturers explain their main advantages in measurement
- Gas turbine flowmeter manufacturer Aister instrument field experience summary
- Aister Instrument Empowerment Conference
