Steam type flowmeter

『Steam type flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. Several key points for the selection, installation, and use of steam vortex flowmeters are as follows: Selection points: Scientific and accurate beam destruction for steam density compensation: When measuring steam mass flow rate, steam pressure and temperature changes must be considered, and density compensation must be carried out through a flow integrator. Platinum resistors for measuring steam temperature need to be installed in a standardized manner, including insertion into the center of the pipeline, installation at 5 times the diameter downstream of the flowmeter, and insulation measures taken at the installation location. When measuring steam pressure, if a pressure pipe is used for pressure measurement, zero point shift must be performed, and it can also be corrected in the flow accumulator; The pressure transmitter is installed at 4 times the diameter downstream of the flowmeter, and its front valve and sealing gasket should be intact and unobstructed. If pressure and temperature compensation are used, the set values should strive to be close to reality. In the flow integrator, it is necessary to correctly set the operating status of the steam flow meter. For situations where it is difficult to determine the steam status, it is recommended to use an intelligent flow integrator, combined with platinum resistors and pressure transmitters for temperature and pressure compensation. Reasonable selection of range ratio: Range ratio is the ratio of the maximum and minimum flow rates that a flowmeter can measure within a given accuracy range. Users should choose a flow meter based on actual usage, and the range of the steam flow meter to be selected should fully cover the users usage range. Using it beyond the upper limit or below the lower limit of flow will result in serious inaccurate measurement. For example, for a vortex steam flowmeter with an actual average flow rate of 5t/h, a vortex flowmeter with a diameter of 150mm should generally be selected. When the flow rate decreases to 0.3t/h or exceeds 15t/h, the flowmeter will experience serious measurement errors. Installation points: Ensure sufficient straight pipe sections: It is customary to install straight pipe sections before and after the vortex flowmeter, with a requirement of 20 times the pipe diameter and 5 times the pipe diameter respectively (when there are no obstacles such as valves in front; if there are obstacles, a straight pipe section should be added). If the upstream and downstream straight pipe sections are not sufficient, it will lead to insufficient development of steam flow in the pipeline and distortion of the velocity distribution profile. Users can adjust the flow velocity distribution of the pipeline by installing a flow regulator in front of the steam flowmeter or adding a straight pipe section, so that the fluid at the steam flowmeter is in a fully developed state. For large-diameter steam flow meters, it is more important to meet the installation requirements of upstream and downstream straight pipe sections. Avoid vibration and electromagnetic interference: Vortex flowmeters are sensitive to mechanical vibration and fiber bonding, and the measurement results are easily affected by vibration interference. Reliable support design should be provided for the front and rear pipe sections of the steam flowmeter, and vibration buffering components should be installed. If pipeline vibration is inevitable, steam flow meters with relatively strong ant

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