Orifice flow meter installation and debugging methods

Abstract: The information on the installation and debugging methods of orifice flowmeters is provided by the excellent flowmeter and flowmeter production and quotation manufacturers. In the flow and steam measurement, the orifice flowmeter is the most commonly used flowmeter, which is widely praised in the market. Many companies that use the orifice flowmeter for the first time are still unfamiliar with how to install and debug the orifice flowmeter. Installation of the orifice flowmeter. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article about the installation and debugging methods of orifice flowmeters. In the flow and steam measurement, the orifice flowmeter is the most commonly used flowmeter, which is widely praised in the market. Many companies that use the orifice flowmeter for the first time are still unfamiliar with how to install and debug the orifice flowmeter. A brief introduction to the installation requirements of the orifice flowmeter and how to debug it, I hope it will be helpful to everyone. Standard orifice flowmeter is a high-range ratio differential pressure flow device composed of standard orifice and multi-parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter and pressure transmitter), which can measure gas , steam, liquid and natural gas flow, widely used in petroleum, chemical, metallurgy, electric power, heating, water supply and other fields of process control and measurement. First, the basic requirements for the installation of the orifice flowmeter: (1). For the newly installed piping system, the standard orifice plate must be installed after the line is cleaned to prevent the debris in the pipe from clogging or damaging the standard orifice plate. (2) Before installation, 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. 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. (3). The centerline of the standard orifice plate should be coaxial with the centerline of the pipe. Second, the installation of the orifice flowmeter to the pipeline requirements: (1). The orifice flowmeter should be installed with a section of measuring pipe, 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 orifice 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, and the two pressure-inducing pipelines should be as close to each other as possible and away from the heat source or vibration source. Below) add heat tracers 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. 3. Debugging method of the orifice flowmeter: (1), connect the signal line and power line (2), open the inlet and outlet valves, the opening of the inlet and outlet valves should be the same (3), open the stainless steel three-valve balance valve, slowly Open the valve at the high and low pressure ends of the orifice plate, and close the stainless steel three-valve balance valve after the fluid passes through the flowmeter. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Orifice flow meter installation and debugging method presentation'

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