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How much length of straight pipe should be left before and after the installation of the flowmeter? Do you have any specific requirements!
Metal tube rotor flowmeter, according to the standard of the Ministry of Machinery, the front straight pipe section should be at least 10 times DN, calculated from the upstream flange end face of the flowmeter, and the rear straight pipe section should be at least 5 times DN, calculated from the downstream flange end face of the flowmeter.. 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 closed pipeline full flow. Although there are many types, 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 position of the flowmeter is that the flow state of the fluid upstream and downs
2. What is the minimum flow rate of a mass flow meter
3. What are the optional size specifications for methanol flow meters
The mainstream size specifications for methanol flow meters cover DN15~DN2000, which needs to be determined based on the type of flow meter, operating flow rate, and pipeline parameters.
1. General size selection interval 1 Small flow scenarios: DN15~DN50, suitable for small diameter conveying scenarios such as workshop sampling pipelines and small filling lines; 2. Medium flow scenario: DN65~DN300, which is the mainstream fitting size for the methanol main pipeline in the factory area; 3. High flow scenarios: DN350~DN2000, suitable for ultra large caliber working conditions such as dock unloading and long-distance methanol pipelines.
2. Size adaptation limitations for different types of flow meters (1) Vortex flow meters: Suitable for DN15~DN300, measurement accuracy will significantly decrease after exceeding DN300, and can only be used for the measurement of non-conductive media (such as anhydrous methanol);
; （2） Electromagnetic flowmeter: suitable for DN10~DN2000, but can only be used for measuring industrial methanol containing trace conductive impurities. Anhydrous methanol cannot be used; （3） Coriolis mass flowmeter: suitable for DN10~DN300, with the highest measurement accuracy, mos