What are the installation requirements and advantages of balanced flow meters?

『Installation requirements for balanced 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. On site inspection steps for balance flow meters: The on-site inspection steps for balance flow meters mainly include five core steps: appearance inspection, installation status confirmation, zero calibration, flow testing, and error calculation. Standard flow meters, pressure gauges, thermometers, and other calibration equipment need to be equipped. 1. Preparation before inspection • Equipment list: Ultrasonic flowmeter (accuracy level 0.5 or above), pressure transmitter (level 0.1), thermocouple (± 0.5 ℃), multimeter • Environmental requirements: Pipeline is full, fluid temperature is stable or registered (± 2 ℃ fluctuation), away from strong electromagnetic interference sources • Safety measures: Confirm the characteristics of the pipeline medium, and protective equipment must be worn for corrosive/high-pressure media. 2 Inspection of Pure Hole Implementation Steps 2.1 Appearance and Installation Inspection • Check for Mechanical Damage or Corrosion in the Flow Meter Body • Confirm the Length of the Front and Rear Straight Pipe Sections (10 D in the front and 5 D in the back, with D being the pipe diameter) • Verify that the gasket is installed concentric to avoid eddy currents 2.2 Static Parameter Calibration • Adjust the Zero Point of the Differential Pressure Transmitter in the Zero Flow State (4-20mA corresponds to 0kPa) • Record the Environmental Atmospheric Pressure and Medium Temperature for Density Compensation • Check the Sealing of the Three Valve Group to Prevent Leakage of the Induced Pressure Pipe 2.3 Dynamic Flow Testing Using Comparison Method for Three Point Calibration (30%, 60%, 100% range): | Standard Meter Reading (m ³/h) | Tested Meter Reading (m ³/h) | Pressure (kPa)| Temperature (℃) | Relative Error (%) | | ------------------------------------------------------------------------------------------------------------------------------ Data processing and judgment - Calculate the indication error according to JJG 640-2016 standard: δ=(Q being tested - Q standard)/Q standard × 100% - Repeat the measurement 3 times and take the average value. The basic error should be ≤± 1.0% - Temperature and pressure compensation calculation is required: Q compensation=Q measurement × √ (ρ design/ρ actual) 4 Precautions • Steam medium should maintain a superheat of>10 ℃ to prevent condensation from affecting • Natural gas measurement must undergo component analysis (methane content>85%) • High risk media (oxygen, hydrogen) must use explosion-proof testing equipment • After inspection, key regulating components need to be sealed with lead and a calibration certificate issued (note: the above data is based on the requirements of the 2023 National Metrology Technical Specification, and specific parameters need to be adjusted according to the latest JJG standard)

2.1 minutes of learning Balance flowmeter straight pipe section requirements

Balance flowmeter straight pipe section requirements are as follows:

1. Length requirement: Upstream straight pipe section: length should be ≥ 10D (D is the inner diameter of the pipeline), referring to the pipe from the pipeline to the flow rate inlet end. Section. Downstream straight pipe section: The length should be ≥ 5D, referring to the pipe section from the outlet end of the flowmeter to the rear.

2. Position and Tilt Angle Position: The upstream and downstream straight pipe sections should be kept horizontal or tilted towards the flow meter side, with a tilt a

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