Abstract: the analysis of several common flow meter scale concept and working principle of the information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Analysis of several common concept and working principle of the flowmeter basics and comparison of several common flow meter; Differential pressure flow meter ( DP) Is a common traffic zui technologies, including nozzle orifice, venturi tube, and the speed of sound. DP flowmeter can be used to measure the most liquid. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a concept and working principle of the analysis of several common flow meter scale article details. Analysis of several common concept and working principle of the flowmeter basics and comparison of several common flow meter; Differential pressure flow meter ( DP) Is a common traffic zui technologies, including nozzle orifice, venturi tube, and the speed of sound. DP flowmeter can be used to measure the most liquid, gas and steam flow rate. DP flowmeter has no moving parts, widely used, easy to use. But the jams, it can produce pressure loss, affect the accuracy. The accuracy of the flow measurement accuracy depends on the pressure gauge. This article will some of the common flow meter has carried on the simple comparison, welcome everybody to supplement the discussion. Differential pressure flow meter ( DP) It is a common traffic zui technologies, including orifice plate, venturi nozzle and the speed of sound. DP flowmeter can be used to measure the most liquid, gas and steam flow rate. DP flowmeter has no moving parts, widely used, easy to use. But the jams, it can produce pressure loss, affect the accuracy. The accuracy of the flow measurement accuracy depends on the pressure gauge. Volumetric flow meter ( PD) PD meter used to measure the volume of a liquid or gas flow rate, it will introduce a fluid measurement space, and calculate the rotational frequency. Impeller, gear, piston or orifice to shunt flow, etc. The accuracy of the PD flowmeter is higher, is one of the several methods of measuring viscous liquid. But it also can produce the pressure of unrecoverable error, and is equipped with moving parts. Turbine meter when the fluid flows through the turbine flow time, fluid makes the rotor rotate. The rotation of the rotor speed is associated with the speed of the fluid. By the average flow velocity of fluid, you feel the rotor flow or volume is deduced. Turbine flowmeter can accurately measure the clean liquid and gas. Like PD flowmeter, turbine flowmeter and produce the pressure of unrecoverable error, also need to moving parts. Electromagnetic flowmeter has the conductivity of the fluid flows through the electromagnetic field, and the speed of the fluid can be obtained by measuring the voltage. Electromagnetic flowmeter has no moving parts, are not affected by the influence of the fluid. When the full package measuring liquid conductivity accuracy is high. Electromagnetic flowmeter can be used to measure slurry flow velocity of the fluid. Ultrasonic flowmeter travel time method and doppler method is often USES the method of ultrasonic flowmeter, used to measure average velocity of the fluid. Like other speed meter is to measure the volume flow meter. If it is unimpeded flow meter, ultrasonic transducer mounted on the pipe outside, you don't need to insert. It is suitable for almost all liquids, including slurry, high precision. But the pipeline dirty can affect the accuracy. Vortex street flowmeter vortex flowmeter is placed in the fluid a streamlined vortex occurrence body, swim speed of vortex and the speed of the fluid with a certain proportion, and volume flow is calculated. Vortex street flowmeter used and measurement of liquid, gas or steam. It has no moving parts and no dirt. Vortex flowmeter can produce noise, but also for fluid with high velocity, to produce a spiral. Thermal mass flowmeter by measuring the temperatures of the fluid or thermal sensor to measure fluid velocity. Thermal mass flowmeter has no moving parts or hole, can accurately measure the flow of gas. Thermal mass flowmeter is one of the few technique which can measure the mass flow rate, and a few used to measure large diameter gas flow technology. The coriolis flowmeter flowmeter using vibrating fluid tube and corresponding deflection to measure mass flow. The coriolis flowmeter can be used for liquid, slurry, gas or steam mass flow rate measurement. High precision. But to the pipe wall for regular maintenance, to prevent corrosion. Electromagnetic flowmeter measurement principle that Faraday's law of electromagnetic induction to prove that a conductor in magnetic field movement will generate a potential induction. Using electromagnetic measurement principle, the flow is the movement of the conductor. Induction electric potential is directly proportional to the relative velocity and detection by two measuring electrode, then the transmitter will enlarge it, according to the above to calculate the flow of the pipeline cross-sectional area is all there is in this article, you are welcome to inquire me factory flowmeter selection, quotation, etc.
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Abstract: the electromagnetic flow meter scale unstable zero check and take corresponding measures to the information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. The electromagnetic flowmeter the cause of the problem. Zero instability in the cause of the problem can be summarized as five aspects, they are: 1 according to the electromagnetic flowmeter sensor for imperfect by stray current interference: check the flow chart of item 3. Pipeline stray current interference effects such as main. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the unstable electromagnetic flowmeter scale zero check and take corresponding measures to the article details. The electromagnetic flowmeter the cause of the problem. Zero instability in the cause of the problem can be summarized as five aspects, they are: 1 according to the electromagnetic flowmeter sensor for imperfect by stray current interference: check the flow chart of item 3. In pipeline stray current interference effects such as the main series of electromagnetic flowmeter good grounding protection, usually requires grounding resistance less than 1000, don't and he Shared grounding electric machines and appliances. Environment condition is good, sometimes can not grounding series electromagnetic flowmeter can work normally, but once the good environment does not exist, the instrument will fail, then checked again will bring much trouble. Flow sensor near the state changes of electric power equipment ( Such as leakage current increase) Formed by the ground potential changes, electricity will cause zinc series of electromagnetic flowmeter zero change. Please read section 9 inspection method. Electromagnetic flowmeter liquid (2 Such as liquid conductivity uniformity, electrode pollution, etc. ) The reason; Inspection and flow chart of item 4. In static liquid conductivity changes or uneven make zero changes, shook the output flow. So flowmeter position should be far away from the injection solution point or pipe section downstream of the chemical reaction, good flow sensor zui in upstream of the sites. If the liquid to solid phase, or to measure impurities deposition tube inner surface, or on the inner wall of the measuring tube fouling, or electrode by grease filth and so on, all have zero changes may occur. Because the lining surface scale and degree of filth and electrode can't completely the same and symmetrical, destroy the balance of plant initial die set. Positive measures sufficient remove filth and scale deposit layer; If zero were little changed also can try to zero. 3 electromagnetic flowmeter signal circuit insulation. Check the flow chart of item 5. Unstable signal circuit insulation fall will form the zero. Soil to reason for the declining signal circuit insulation of foot, package parts drop caused by the insulation, but also can't rule out signal cable and terminal decline or insulation damage. Because sometimes the environment is very harsh, slightly one careless negligence meter cover/wire joint sealing, filled with moisture acid mist or powder dust intrusion meter connector or cable protection layer, insulating bligh. Signal circuit insulation resistance check respectively according to the cable side and the flow sensor side two mail points, with a megger test. Because of signal cable can do easily. Flow sensor is divided into two: strider liquid-filled test electrode surface and a tube after measuring contact resistance, U insulation resistance. 4 / inspection electrode and electrode contact resistance insulation resistance in 2 steps. （ 1) Filled with liquid measuring scoop of electrode surface contact resistance flow sensor signal cable wiring, each electrode is measured with a multimeter, respectively, and the ground, resistance between two electrodes of geoelectric elder sister value should be left in the 10% to 20%. Section 9 'a/electrode contact resistance measurements will have further instructions. （ 2) Atc measuring electrode insulation vent pipe, wipe with dry cloth in the inner surface, after being completely dry, use H500VDC megohmmeter measure the resistance between the electrode and ground, resistance must be in the 100 m & Omega; The above. 。 Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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Abstract: The information on the selection, installation and use of turbine flowmeters is provided by excellent flowmeter and flowmeter manufacturers. Turbine flowmeter is a new type of intelligent instrument that integrates turbine flow sensor and display totalizer developed by using advanced ultra-low power consumption single-chip microcomputer technology. Not subject to outside. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following are the details of the article on the selection, installation and use of turbine flowmeters. Turbine flowmeter is a new type of intelligent instrument that integrates turbine flow sensor and display totalizer developed by using advanced ultra-low power consumption single-chip microcomputer technology. It has obvious advantages such as being free from external power supply interference, anti-lightning and low cost. Selection of turbine flowmeters The correct selection of turbine flowmeters can ensure better use of turbine flowmeters. What type of turbine flowmeter should be selected should be determined according to the physical and chemical properties of the fluid to be measured? Make the diameter, flow range, lining material, electrode material and output current of the turbine flowmeter suitable for the fluid to be measured. Properties and flow measurement requirements. 1. Accuracy grade and function of precision function inspection The accuracy grade of the instrument is selected according to the measurement requirements and application occasions, so as to be economical and cost-effective. For example, in the case of trade settlement, product handover and energy measurement, a higher accuracy level should be selected, such as 1.0, 0.5, or higher; for process control, different accuracy levels should be selected according to control requirements; some only It is to detect the process flow without precise control and measurement. You can choose a slightly lower accuracy level, such as 1.5, 2.5, or even 4.0. In this case, you can choose a low-cost plug-in turbine flowmeter. 2. Measurable medium The flow rate of the medium, the measuring range and caliber of the instrument can be measured. When measuring the general medium, the full-scale flow rate of the turbine flowmeter can be measured at 0.5 of the medium flow rate.—It is selected within the range of 12m/s, and the range is relatively wide. The specification (diameter) of the selected instrument is not necessarily the same as that of the process pipeline. It should be determined according to whether the measurement flow range is within the range of the flow rate, that is, when the flow rate of the pipeline is too low to meet the requirements of the flow meter or the measurement accuracy cannot be guaranteed at this flow rate, It is necessary to reduce the diameter of the instrument to increase the flow rate in the pipe and obtain satisfactory measurement results. Installation In order to ensure the accurate measurement of the turbine flowmeter, the installation position and method must be correctly selected. Requirements for the straight pipe section: the flowmeter must be installed horizontally on the pipeline (the inclination of the pipeline is within 5), and the axis of the flowmeter should be concentric with the axis of the pipeline during installation. , the flow should be consistent. The length of the upstream pipeline of the flowmeter should have an equal diameter straight pipe section of not less than 2D. If the installation site is allowed, it is recommended that the upstream straight pipe section is 20D and the downstream is 5D. Requirements for piping: The inner diameter of the upstream and downstream piping at the installation point of the flowmeter is the same as the inner diameter of the flowmeter. Requirements for the bypass pipe: In order to ensure that the normal use of the medium is not affected during the maintenance of the flowmeter, a cut-off valve (stop valve) should be installed on the front and rear pipelines of the flowmeter, and a bypass pipe should be set at the same time. The flow control valve should be installed downstream of the flowmeter. When the flowmeter is used, the shut-off valve installed upstream must be fully opened to avoid unstable flow of the fluid in the upstream part. Requirements for the external environment: The flowmeter is best installed indoors. When it must be installed outdoors, sun protection, rain protection and lightning protection measures must be adopted to avoid affecting the service life. Requirements for impurities contained in the medium: In order to ensure the service life of the flowmeter, a filter should be installed before the straight pipe section of the flowmeter. Installation site: The flowmeter should be installed in a place that is easy to maintain and has no strong electromagnetic interference and heat radiation. Requirements for installation and welding: The user should add a pair of standard flanges to be welded on the front and rear pipes. Welding with flow meter is not allowed! Before installing the flowmeter, the welding slag and other dirt in the pipeline should be strictly removed. To ensure that the flowmeter is not damaged during use. When installing the flowmeter, the gasket between the flanges must not be recessed into the pipeline. Requirements for the grounding of the flowmeter: the flowmeter should be grounded reliably and cannot be shared with the ground wire of the strong current system. Requirements for explosion-proof products: For the safe and normal use of the instrument, it is necessary to review whether the use environment of the explosion-proof flowmeter is in line with the user's explosion-proof requirements, and during the installation and use process, the national requirements for the use of explosion-proof products should be strictly observed, and users should not change it by themselves The connection method of the explosion-proof system must not open the instrument at will. The selection is within the specified flow range to prevent overspeed operation to ensure ideal accuracy and normal service life. Before installing the flowmeter, the debris in the pipeline should be cleaned: debris, welding slag, stones, dust, etc. It is recommended to install a filter with a 5 micron mesh upstream to block droplets and sand particles. When the flowmeter is put into operation, the front valve should be opened slowly first, and then the rear valve should be opened to prevent damage to the turbine due to instantaneous airflow impact. Lubricating oil should be operated according to the notice board, and the number of refueling depends on the cleanliness of the temperament, usually 2-3 times a year.
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Vortex flowmeter is a flow measuring instrument. Its original name is: vortex flowmeter. Why are many people called vortex steam flowmeter? Street steam flow meter up. What are the characteristics of vortex flowmeters? People in the industry once said that vortex flowmeters have the characteristics of high measurement accuracy and good stability. When measuring gas media, most of them are solved by using vortex flowmeters. What are the advantages of the vortex flowmeter: 1. The design of the vortex flowmeter is simple, easy to install, and does not require a pressure pipe and three-valve assembly, reducing leakage and blockage. 2. The output of the vortex flowmeter is proportional to the flow, and there will be no zero drift. 3. The vortex flowmeter has the characteristics of wide range ratio and high precision. Although the vortex flowmeter has many advantages, it is used less in the process of use, because in the working condition of steam measurement, the vortex flowmeter is not as stable as the V-cone flowmeter.
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Ultrasonic Gas Flow Meters for Leak Detection in Natural Gas Pipelines

Introduction:

Natural gas is a valuable and widely used energy source across the globe. However, the transportation of natural gas through pipelines poses various challenges, including the risk of leaks. Detecting and addressing these leaks promptly is crucial to ensure safety and prevent energy losses. Ultrasonic gas flow meters have emerged as a reliable and efficient solution for leak detection in natural gas pipelines. This article will explore the technology behind ultrasonic gas flow meters and how they contribute to effective leak detection.

Understanding Ultrasonic Gas Flow Meters:

Ultrasonic gas flow meters utilize the principles of ultrasound to measure the flow rate of natural gas within the pipelines. These meters consist of transducers that generate ultrasonic pulses, which are then reflected back by the gas flow. By analyzing the time taken for the pulses to travel between transducers, the flow rate can be accurately calculated. Ultrasonic meters offer several advantages, including non-intrusiveness, high accuracy, and the ability to measure flow in both directions.

The Role of Ultrasonic Gas Flow Meters in Leak Detection:

Leak detection is a critical aspect of pipeline management. Even small leaks can result in significant energy loss and environmental hazards. Ultrasonic gas flow meters play a vital role in promptly identifying and locating such leaks. By continuously monitoring the flow rate and comparing it with historical data, these meters can detect deviations that indicate potential leaks. Ultrasonic meters can detect leaks in real-time, enabling operators to take immediate action and prevent further damage.

Advantages of Ultrasonic Gas Flow Meters for Leak Detection:

1. Sensitivity: Ultrasonic gas flow meters can detect even small leaks, ensuring an early response and preventing potential disasters.

2. Accuracy: These meters provide highly accurate measurements, allowing operators to monitor the flow rate with precision.

3. Non-Intrusiveness: Ultrasonic meters do not interfere with the pipeline's structural integrity, ensuring uninterrupted and reliable gas flow.

4. Versatility: They can be used for various pipeline sizes and materials, making them suitable for different environments and applications.

5. Minimal Maintenance: Ultrasonic meters are low-maintenance devices, resulting in reduced downtime and increased operational efficiency.

Installation and Integration:

Installing ultrasonic gas flow meters for leak detection in natural gas pipelines requires careful planning and integration. The meters are typically placed at strategic locations along the pipeline, ensuring maximum coverage. Integration with a centralized monitoring system is essential to facilitate real-time leak detection and data analysis. The collected data can be further analyzed to identify potential leak-prone areas, allowing for proactive maintenance and repair.

Challenges and Limitations:

While ultrasonic gas flow meters have proven to be effective in leak detection, some challenges and limitations must be considered. External factors such as temperature, pressure, and gas composition can affect the accuracy of measurements. Calibration and periodic maintenance are necessary to ensure optimal performance. Additionally, the initial cost of installing ultrasonic meters can be higher compared to other leak detection methods. However, considering the long-term benefits and savings associated with early leak detection, the investment is worthwhile.

Case Study: Successful Implementation of Ultrasonic Gas Flow Meters for Leak Detection:

In a recent project carried out by XYZ Corporation, ultrasonic gas flow meters were installed in a natural gas pipeline network spanning several hundred kilometers. The meters successfully detected multiple leaks, enabling the operators to take immediate action and prevent significant losses. The real-time data provided by the meters allowed for efficient maintenance planning and proactive leak prevention strategies. The project showcased the effectiveness and reliability of ultrasonic gas flow meters in leak detection applications.

Conclusion:

Ultrasonic gas flow meters have revolutionized the way leak detection is carried out in natural gas pipelines. Their sensitivity, accuracy, and non-intrusive nature make them a preferred choice for operators worldwide. By continuously monitoring the flow rate and promptly detecting leaks, ultrasonic meters contribute to improved safety, reduced energy waste, and cost savings. As technology advances, these meters are likely to become even more efficient and integrated into comprehensive pipeline management systems.

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