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What are the installation requirements for liquid ultrasonic flow meters?
The installation of liquid ultrasonic flow meters requires strict control from three aspects: environment, straight pipe section, and pipeline material. Specific requirements are as follows:
1. The installation site environment should avoid strong interference sources: the ultrasonic flow meter host and sensor installation points should be far away from strong interference sources such as motors and magnetic fields to prevent signal confusion or inability to receive.
. Stay away from sudden changes in pipeline structures: Sensor installation points should avoid positions such as valves, tees, elbows, etc. that may cause fluid turbulence to ensure stable measurement signals.Secondly, the straight pipe section requires a stable flow state: The ultrasonic flowmeter needs sufficient front and rear straight pipe sections to maintain a stable flow state of the liquid inside the pipeline, thereby ensuring measurement accuracy.
. Specific length standard: Upstream straight pipe section: The upstream of the sensor needs to maintain a distance of 10 times the pipe diameter (i.e. 10 times the pipe diameter). Downstream straight pipe section: The sensor downstream needs to maintain a distance of 5 times the pipe diameter (i.e. 5 times the pipe diameter). Example: If the diameter of the pipeline is 200mm, a 2000mm (2m) straight pipe section is required upstream, and a 1000mm (1m) straight pipe section is required downstream.3. Requirements for pipeline material: Depending on the type of sensor, the pipeline material must meet the following conditions: Pipeline sensor: There are no special requirements for pipeline material, but it is necessary to ensure that the flange is perfectly connected to avoid leakage or installation misalignment.
. Insertion sensor: The base needs to be welded, so the pipeline material must meet the welding requirements (such as weldable materials such as carbon steel, stainless steel, etc.). External clamp sensor: Suitable materials: dense and easy to transmit ultrasonic materials such as stainless steel, carbon steel, cast iron, PVC plastic, etc. Special treatment: If there is anti rust paint, insulation layer, etc. outside the pipeline, it needs to be polished to expose the metal substrate or smooth surface to ensure effective transmission of ultrasonic signals. Not applicable materials: materials with severe ultrasonic attenuation such as fiberglass and concrete, or pipes with rough and porous interiors. 4. Other precautions: Sensor installation direction: It is necessary to fix the direction according to the instructions (such as horizontal, vertical, or inclined installation) to avoid measurement errors caused by incorrect direction. Temperature and pressure range: Ensure that the temperature and pressure of the liquid in the pipeline are within the rated range of the flow meter to prevent damage to the sensor or affect accuracy. Regular calibration: Initial calibration is required after installation, and regular reviews should be conducted during use to address pipeline wear or changes in fluid characteristics. Summary: The installation of liquid ultrasonic flowmeter requires a comprehensive consideration of three core elements: environmental interference, length of straight pipe section, and adaptability of pipeline material, while also taking into account sensor type and installation details. Strictly
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