Scale of daqing oil field gas ultrasonic flowmeter online real flow verification

Abstract: the scale of daqing oil field gas ultrasonic flowmeter online real flow verification information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1, the introduction of prover mobile sonic nozzle gas flow standard device is a national large crude oil flow metering station in 1988 from Colorado engineering experiment stations ( CEESI） Introduction, real flow for online check ( Test) Standard orifice flow meter, flow of gas turbine. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the scale of daqing oil field gas ultrasonic flowmeter online real flow test article details. 1, the introduction of prover mobile sonic nozzle gas flow standard device is a national large crude oil flow metering station in 1988 from Colorado engineering experiment stations ( CEESI） Introduction, real flow for online check ( Test) Standard orifice flowmeter, turbine flowmeter, gas ultrasonic flowmeter, etc. The standard device for the skid structure, the nozzle group ( 16 the nozzle) , digital valve, pressure transmitter, temperature transmitter, differential pressure transmitter, on-line gas chromatograph and data acquisition and processing system of sampling and processing can be instantaneous flow ( The condition or volume flow to mass flow) Signal and the cumulative amount ( Pulse) Using various signals and can be used for the current domestic type gas flowmeter calibration. 2, the preparing work before test gas ultrasonic flowmeter has a pressure transmitter, temperature transmitter, and traffic and other secondary instrument, computer, in front of the flowmeter verification should be carried out in accordance with the verification regulation of transducer calibration, the calibration of flow computer input and output channels, will bring the secondary instrument systematic error zui to small. Start the on-line gas chromatographic analyzer, analysis of the pipeline gas components, and the analysis results to lose traffic computers and devices in the data processing system. Inspection on flow computer configuration data, and make it consistent with the process conditions. 3, the choice of the verification process with mobile sonic nozzle gas flow standard device to online real flow field of the flowmeter verification, you need to device bunch of people in the process flow metering station. Due to the conditions of various metering station, verification process to choose according to the actual situation of the scene. * : to the north of Beijing tongzhou oil gas station as an example, the station is the shanxi-beijing pipeline gas to Beijing at the end of the station. Station pressure of 4. OMPa, outbound pressure of 1. 4MPa。 Due to the mobile sonic nozzle gas flow standard device zui high working pressure of 2. OMPa, so to upstream gas after flowmeter, install 1 first pressure regulating valve, pressure will be dispatched to 2. OMPa around, and then connect the sonic nozzle standard device. The second case: with natural gas company in hebei shijiazhuang station as an example, the station is a measuring points to the shijiazhuang city gas supply station. Station pressure of 1. 7 mpa, the outbound pressure of 1. 2MPa。 Due to the upstream to the gas pressure is less than the device zui high working pressure, verification device can be directly string of downstream flow meter. The third kind of situations: gas company in the third distribution plant of Beijing as an example, the factory is Beijing city pipe network station. Station pressure of 1. 5 mpa, city pipe network pressure is 1. 1MPa。 Due to the site and the upstream station distance is very close, at the end of the ultrasonic flowmeter is influenced by the station upstream pressure regulating valve, produce very big pulsating flow. Verification when the device must be meet someone (upstream of flowmeter Sonic nozzle have the effect of steady flow) 。 4, the choice of the verification method of gas ultrasonic flowmeter calibration, generally there are two ways to choose. One is only for flow meter itself for verification. Verification, the flowmeter signal, temperature signal, pressure signal directly access device of data acquisition and control system; Another kind is to test the whole measurement system. Verification, from the outlet flow computer analog signals, people up the device of data acquisition and control system. This method can install the field may affect the flow measurement conditions, working conditions and medium conditions, environmental conditions, signal transmission, calculation and transformation, all factors are included in the test results, timely discover and find out the problems existing in the measurement system, and through the flowmeter coefficient of correction to eliminate a lot of uncertain factors, so as to improve the accuracy of flow measurement. 5, test data processing of gas ultrasonic flowmeter calibration results, generally the MF coefficient of flow meter is given. For only one meter coefficient of flow meter, using a 2001 GB/T18604 the gas ultrasonic flowmeter was used to measure gas flow in the appendix the weighted average method, according to the coefficient of each flow check point, work out the instrument coefficient of flow meter, the new instrument coefficient of flow meter in. For multiple flow meter can be input coefficient to correct the fragment, flow meter, each flow check point man instrument coefficient of flow meter. 6, verification of the common problems and treatment methods ( 1) Noise interference.

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