Introduction to Selection of Pipeline Flowmeter

Flowmeter is a commonly used flow measuring instrument, which is widely used in the fields of industry, petroleum, chemical industry, metallurgy, electric power, mining and so on. The user needs to master certain selection skills when choosing a flowmeter. Today, I will introduce the selection skills of the flowmeter in detail, hoping to help users better apply the product. 1. When we select the pipeline flowmeter, we must consider the following five aspects: 1. The performance index of the flowmeter: including the accuracy, repeatability, linearity, range, flow range, signal of the flowmeter Technical indicators such as output characteristics, response time, pressure loss, etc.; 2. Measuring fluid characteristics: fluid temperature, pressure, density, viscosity, chemical corrosion, abrasiveness, fouling, miscibility, phase change, electrical conductivity, sound velocity, thermal conductivity , Specific heat capacity, isentropic index; 3. The installation conditions of the flow meter: mainly include the pipeline arrangement direction, the flow direction, the length of the upstream and downstream straight pipes of the detection parts, the pipe diameter, maintenance space, power supply, grounding, auxiliary equipment (filter, air remover) 4. The environmental environment of the flowmeter: including ambient temperature, humidity, electromagnetic interference, safety, explosion-proof, pipeline vibration, etc.; 5. Economic factors: flowmeter purchase cost, installation cost, operating cost, calibration Expenses, maintenance costs, instrument service life, spare parts, etc. 2. The steps for the selection of pipeline flowmeter instruments are as follows: 1. According to the type of fluid and five consideration factors, the available instrument types are initially selected (there are several types for selection); 2. The data and price information for the preliminary selection The collection of data is to prepare conditions for in-depth analysis and comparison; 3. Use the elimination method to gradually concentrate on 1 to 2 types, and to repeatedly compare and analyze the five factors to finally determine the pre-selection target.

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