What do I need to know when choosing a vortex flowmeter to measure steam?

Time: 2024-07-27
Equipment Configuration:vortex flowmeter

When choosing vortex flowmeter to measure steam, it is necessary to pay attention to the length of straight pipe section, temperature and pressure compensation, vibration sensitivity, installation location and signal type selection. Combined with the site process and environmental factors, reasonable selection and installation to ensure accurate and reliable measurement.

Project Overview

When choosing a vortex flowmeter to measure steam, you need to pay attention to the following key points:

  1. Straight pipe section requirements: Vortex flowmeters have certain requirements for straight pipe sections. It is usually recommended that the upstream straight pipe section be 5 times the pipe diameter. (D), the downstream straight pipe section is also of a certain length to ensure fluid stability and improve measurement accuracy.

  2. Temperature and pressure compensation: For saturated steam, temperature or pressure compensation is usually required. Pressure compensation, since the density of saturated steam is directly related to its pressure and temperature. Measurements of unsaturated steam (superheated steam) may require more complex compensation strategies

  3. Vibration sensitivity: Vortex flowmeters are sensitive to pipeline vibration, so when installing them on pipes with large vibrations, shock-absorbing measures need to be taken to avoid measurement errors.

  4. Installation location: Consider. Install the flow meter before the pressure reducing valve to avoid phase change problems, or add a pressure transmitter after the pressure reducing valve for temperature and pressure compensation to ensure signal measurement accuracy. Type selection: Although the 4-20mA output vortex flowmeter is more popular in steam measurement because it is cheaper, easy to adjust the full scale and simpler to calculate the steam mass flow rate, it should also be based on actual needs and system compatibility To choose the appropriate signal output type

In summary, when choosing a vortex flowmeter to measure steam, you must not only consider the characteristics of the instrument itself, but also combine it with the on-site conditions. Process conditions and environmental factors, reasonable selection and installation layout to ensure measurement accuracy and reliabilityReliability.

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