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『Before and after the 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)
How much length of straight pipe should be left before and after the installation of the flowmeter? Do you have any specific requirements!
For metal tube rotor flow meters, the standard of the Ministry of Machinery stipulates that the front straight pipe section should be at least 10 times the diameter of the flow meter, starting from the upstream flange end face of the flow meter. The rear straight pipe section should be at least 5 times the diameter of the flow meter, starting from the downstream flange end face of the flow meter.. DN refers to the diameter of the flow meter. The standard of the mechanical department does not specify the length of the straight pipe section before and after the glass rotor flowmeter. However, it is stipulated that if a flow regulating valve is to be installed, it must be installed at 5-10 times the DN downstream of the flowmeter, starting from the flange end face downstream of the flowmeter. DN refers to the diameter of the flow meter. Additional information: When installing a traffic meter, in order to achieve the same accuracy as real flow verification, it is necessary to meet the specified flow conditions. At present, except for a few types such as volumetric and Coriolis mass flow meters, there are specific requirements for the length of the front and rear straight pipe sections. A velocity flowmeter is a flowmeter based on the principle of directly measuring the flow velocity of a fully enclosed pipeline. Although there are various types of flow meters, their measurement principles are the same. The accuracy of the measured flow velocity is not only related to the accuracy of the flowmeter itself, but also to its installation position. The ideal installation positi
2. Flow Meter Front Five and Rear Three, Five Finger Arrow Front or Arrow Rear?
The first five and the last three refer to the straight pipe section distance of 3 or 5 times the diameter (unit) in front or behind the rock search surface where the pipeline is opened. For example, if the flow meter is DN100, there should be a 5 * 100mm straight pipe section at the front and a 3 * 100mm straight pipe section at the back to ensure proper distance. Refer to Wang Shens diagram for calculation method:
3. What are the regulations on the front and rear dimensions when installing a flowmeter?
When installing a flowmeter, there are certain regulations on its front and rear dimensions, mainly to ensure measurement accuracy. Generally speaking, there are differences in requirements for flow meters of the same type that are not silent. Taking common throttling flow meters as an example, such as orifice flow meters, in order to achieve fully developed turbulent flow before entering the flow measurement device, the length of the upstream straight pipe section is usually required to be no less than 10 times the inner diameter of the pipeline, and the length of the downstream straight pipe section is usually required to be no less than 5 times the inner diameter of