Talking about how to choose the gas turbine flow meter correctly

Abstract: Talking about how to correctly choose the gas turbine flow meter information is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. Abstract: With the advancement of the West-East Gas Pipeline Project, the use of natural gas has become more and more extensive, and the gas turbine flowmeter has become an indispensable measuring instrument in the process of using natural gas. This article will select, use and maintain the gas turbine flowmeter. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is a brief introduction to the details of the article on how to correctly choose a gas turbine flowmeter. along with“West-East Gas Pipeline”With the advancement of the project, the use of natural gas has become more and more extensive, and the gas turbine flowmeter has become an indispensable measuring instrument in the process of using natural gas. This article introduces the issues that should be paid attention to in the selection, use and maintenance of gas turbine flowmeters for readers' reference. 1. Selection of gas turbine flowmeters The selection of gas turbine flowmeters should be considered from the following aspects: 1. Accuracy level: Generally speaking, the selection of turbine flowmeters is mainly based on its high accuracy, but the higher the accuracy of the flowmeter, the higher the accuracy. The more sensitive it is to the changes in the field conditions, so the choice of the accuracy of the instrument should be cautious, and it should be considered from an economic point of view. For the trade settlement instruments of large-diameter gas pipelines, it is cost-effective to invest more in the instruments, and for occasions where the transportation volume is not large, the medium-precision level can be selected. 2. Flow range: The selection of the flow range of the turbine flowmeter has a great influence on its accuracy and service life, and each type of flowmeter has a certain measurement range, and the selection of the flowmeter diameter is also determined by the flow range . The principle of selecting the flow range is: the minimum flow rate in use shall not be lower than the minimum flow rate allowed by the instrument, and the maximum flow rate in use shall not be higher than the maximum flow rate allowed by the instrument. For intermittent work occasions where the actual running time of the instrument per day does not exceed 8 hours, select 1.3 times the maximum flow rate in actual use as the upper limit of the flow range; for continuous working occasions where the actual running time of the instrument per day is not less than 8 hours, select the 1.4 times the maximum flow rate during use as the upper limit of the flow range. The lower limit flow rate of the instrument is appropriate to be 0.8 times the actual minimum flow rate. 3. Gas density: For gas turbine flowmeters, the influence of fluid physical properties is mainly gas density, which has a greater impact on the meter coefficient, and is mainly in the low flow area. If the gas density changes frequently, corrective measures should be taken to the flow coefficient of the flowmeter. 4. Pressure loss: try to choose a turbine flowmeter with a small pressure loss. Because the pressure loss of the fluid passing through the turbine flowmeter is smaller, the energy consumed by the fluid from the input to the output pipeline will be less, that is, the total power required will be reduced, which can greatly save energy, reduce transportation costs, and improve utilization. . Some people have done tests, and the main component that affects the pressure loss is the front deflector of the turbine flowmeter. Compared with the front deflector of the semi-ellipsoid, the pressure loss of the former turbine can be greatly reduced. 5. Structural type: (1) The reverse thrust turbine flowmeter should be selected for the internal structure. Because the reverse thrust structure can keep 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 face friction and wear, which can prolong the service life of the bearing. (2) According to the pipeline connection method, the flowmeter has two types of horizontal and vertical installation. The horizontal installation and pipeline connection methods include flange connection, threaded connection and clamp connection. Flange connections are used for medium diameters; threaded connections are used for small diameter and high pressure pipelines; clip-on connections are only suitable for low-pressure, medium and small diameter pipes; vertical installations only have threaded connections. (3) Select the type according to the environmental conditions, and consider the influence of temperature and humidity. Natural gas metering should choose intrinsically safe explosion-proof turbine flowmeter. 6. Bearings: The bearings of turbine flowmeters are generally made of three types of materials: tungsten carbide, polytetrafluoroethylene, and carbon graphite. Natural gas measuring instrument bearings should be made of tungsten carbide. The above are the main aspects to consider when selecting a model. Since there are many types and specifications of turbine flowmeters, especially the quality of products of different manufacturers is different, when selecting models, you should try to collect relevant technical standards and other information of manufacturers and products, and then make a decision after repeated investigation and comparison. 2. Use and maintenance In order to ensure the long-term normal operation of the gas turbine flowmeter, it is necessary to check the operation status of the flowmeter frequently, do a good job in maintenance work, and eliminate problems in time. 1. Before the turbine flowmeter is put into operation, it is necessary to set the meter coefficient, check it carefully, and make sure that the connection of the flowmeter is correct and the grounding is good before power transmission. 2. Regularly clean, check and recalibrate the flowmeter. For flowmeters equipped with lubricating oil or cleaning fluid injection ports, lubricating oil or cleaning fluid should be injected regularly according to the requirements of the manual to maintain the good operation of the impeller. 3. Monitor the status of the display meter, evaluate the display meter reading, and check in time if there is any abnormality. 4. Keep the filter unobstructed. If the filter is blocked by impurities, it can be judged from the increase in the difference between the pressure gauge readings at its inlet and outlet, and the blockage should be removed in time, otherwise, the flow will be seriously reduced. 5. For large-flow trade settlement measurement, in order to ensure the accuracy of the flowmeter, the flowmeter must be checked frequently. The site should be equipped with on-line calibration equipment, or equipped with a mobile calibration device. Although the one-time investment is large, it is worthwhile considering the long-term economic benefits. The above is the whole content of this article,You are welcome to inquire about the flowmeter selection and quotation of our factory. 'On How to Correctly Select Gas Turbine Flow Meters'

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