Pipeline requirements for installation and use of orifice flow meter

Abstract: When the orifice flow meter is installed and used, the information on the pipeline requirements is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. Orifice flowmeters are widely used in process control and measurement in petroleum, chemical, metallurgy, electric power, heating, water supply and other fields. Before installing the flowmeter, carefully check whether the number, position number, and specification of the standard orifice plate are consistent with the pipeline conditions, flow range and other parameters. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the pipeline requirements when the orifice flowmeter is installed and used. Orifice flowmeters are widely used in process control and measurement in petroleum, chemical, metallurgy, electric power, heating, water supply and other fields. Before the flowmeter is installed, it should be carefully checked whether the number, position number, and specification of the standard orifice plate are consistent with the pipeline conditions, flow range and other parameters. Marked near the pressure tap“+”One end should be connected to the fluid upstream section, marked with“—”One end should be connected to the downstream pipe section of the fluid. For a new pipeline system, the standard orifice plate must be installed after the line is scanned to prevent the debris in the pipe from clogging or damaging the standard orifice plate, which will reduce the measurement accuracy. The centerline of the standard orifice plate should be coaxial with the centerline of the pipe. The orifice flowmeter has the following requirements for the pipeline during installation: 1. When the flowmeter is installed, it should be equipped with a section of measuring pipe, and at least keep the same diameter straight pipe section of the first 10DN and the rear 5DN to improve the measurement accuracy. 2. If a valve needs to be installed before and after the flowmeter, it is best to choose a gate valve and fully open it during operation; the regulating valve should be in the pipeline after 5DN downstream. 3. The inner diameter of the pressure-inducing pipeline is related to the length of the pipeline and the degree of contamination of the medium. Usually, a pipe with an inner diameter of 8-12mm is used within 45 meters. 4. When measuring the liquid flow, the horizontal section of the impulse pipe should be in the same horizontal plane. If the throttling piece is installed on the vertical pipeline, the short pressure pipes are separated by a certain distance (the direction of the vertical line), which will affect the zero point of the differential pressure transmitter and should be passed through.“Zero migration”to correct. 5. The pressure-inducing pipeline should be supported by a firm bracket. The two pressure-inducing pipelines should be as close to each other as possible and away from the heat source or vibration source. When measuring the water vapor flow, they should be wrapped with thermal insulation materials. ) Add heat tracing pipe to prevent icing. When measuring dirty flow, an isolator or settler should be attached. 6. The single-phase fluid state must always be maintained in the impulse piping. When the measured fluid is gas, all the pressure piping (including the pressure chamber of the differential pressure gauge) is gas phase; when the measured fluid is liquid, all the pressure piping is liquid phase, and there must be no air bubbles. For this reason, a drain valve should be installed at the lowest point of the pressure piping or an exhaust valve should be installed at the highest point, and special attention should be paid when the differential pressure transmitter is newly installed or repaired. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Pipeline Requirements for Installation and Use of Orifice Flow Meters'

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