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『Requirements for installing straight pipe sections of flow meters』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. What are the types of mass flow meters?
2. Requirements for straight pipe sections at the inlet and outlet of electromagnetic flow meters.
The requirements for straight pipe sections at the inlet and outlet of electromagnetic flow meters are as follows: Inlet straight pipe section: Basic requirements: The inlet straight pipe section must meet a minimum length of 10 × DN (DN is the inner diameter of the measuring pipe). If conditions permit, it is recommended to reach a length of 15 × DN, calculated from the electrode axis. Special working condition requirements: If there are mixing components such as valves, elbows, tees, and water pumps on the upstream side of the flowmeter, the length of the front straight pipe section should be greater than 20 × DN to eliminate the influence of mixing components on the fluid flow state and ensure measurement accuracy. Measurement requirements for mixed media: When measuring mixed media of different liquids, the distance between the mixing point and the flow meter fiber should be at least 30 × DN in length. If the distance is insufficient, the mixed medium may not be sufficiently uniform, resulting in unstable flow meter display. Outlet straight pipe section: The outlet pipeline must have a minimum length of 5 × DN, and the distance should also be calculated from the electrode axis. The requirement for the length of the outlet straight pipe section is relatively low because the fluid flow state at the outlet has a small impact on the measurement accuracy. Improvement measures: To further improve the impact of eddy currents and flow field distortions on measurement results, one of the following two measures can be taken: increasing the length of the straight pipe s
3. Requirements for straight pipe sections at the inlet and outlet of electromagnetic flowmeter
The requirements for straight pipe sections at the inlet and outlet of electromagnetic flowmeter are as follows: Inlet straight pipe section: Basic requirements: The inlet straight pipe section must meet a minimum length of 10 × DN (DN is the inner diameter of the measuring tube), calculated from the electrode axis.
. Optimization suggestion: If conditions permit, it is recommended to extend the inlet straight pipe section to 15 × DN to further reduce the impact of flow field distortion on measurement accuracy. Special scenario: If there are stirring components such as valves, elbows, tees, pumps, etc. on the upstream side of the flowmeter, the length of the inlet straight pipe section needs to be increased to ≥ 20 × DN to ensure that the fluid is fully stable before entering the flowmeter. Outlet straight pipe section: The outlet pipeline must have a minimum length of 5 × DN, and the distance should also be calculated from the electrode axis. The outlet straight pipe section is mainly used to reduce turbulent interference during fluid discharge, which has a relatively small impact on measurement accuracy. However, it is necessary to avoid fluid