Abstract: correct selection and orifice meter scale to form a complete set of secondary instrument information produced by excellent flow meter
, flow meter manufacturer to offer you the quotation.
Standard orifice flow meter because of its simple structure, convenient operation, use mature technology, makes it widely used in pipeline measurement, according to statistics, the current measurement orifice meter is China's natural gas pipeline with zui more measuring equipment, measurement of the trade.
More flow meter manufacturers choose model price quote you are welcome to inquire, here is the correct choice and orifice meter scale to form a complete set of secondary instrument article details.
Standard orifice flow meter because of its simple structure, convenient operation, use mature technology, makes it widely used in pipeline measurement, according to statistics, the current measurement orifice meter is China's natural gas pipeline with zui more measuring equipment, measurement of the whole trade accounted for about 50%.
In order to standardize orifice plate flow measurement, the national specialized GB2628 and SY/T 6143 standards of measurement, the measurement system is illustrated and requirements, at the same time, also introduced natural gas terminal instrument equipped with guide, on the metering system instrumentation precision grade requirements.
But due to the structure characteristics of the orifice flowmeter
metering system, determines the error is produced, is a fundamental error, this is the error of flowmeter itself is, the second is additional error, is due to the meter when use the deviation from the standard conditions.
Because of artificial operation link, the material and natural gas metering is a continuous, not repeatable metering, if not timely monitoring, additional error of measurement caused by considerable, especially when natural gas as a commodity to settle trade bring adverse effect for both the supply and the demand, this paper analyzes the error of the main causes, and proposes the corresponding improvement measures.
Mainly for the selection of the secondary instrument, make some Suggestions.
Correct choose matching instrument (
Measurement of gas flow standard orifice throttling device production should comply with the standard requirements, form a complete set of pressure, differential pressure and Pt100 platinum thermal resistance model, accuracy and range should match the site conditions, especially the flow integrating instrument or computer system supporting software and the econometric model, the SY/T6143 - should be equivalent
2004 standard calculation formula, or nearly AGA ReportNo.
3 zui new version.
Orifice flowmeter measurement range (
A narrow, usually is 3:1 or 4:1, but it can be in aperture than 1-0 & le;
0:7 5 range by adjusting the standard orifice diameter to expand the range.
But want to select a wider range than the pressure and differential pressure transmitter, smart integrating system can real-time computing C value input components.
Site installation condition demand is high, often cannot meet the needs of the natural gas pipe network pipeline gas metering wide-range.
Orifice acute Angle edge wear, scaling factors will affect measuring accuracy.
Need to check, clean the orifice plate.
Measuring gas flow rate and for the custody transfer metering standard orifice plate, pressure and differential pressure transmitter, temperature transmitter and gas chromatograph and other supporting equipment, should be timely verification.
3 refer to foreign advanced technology, speed up the development of new type flowmeter gas is increasingly important disposable energy in the 21st century, in the international trade of natural gas, energy metering is almost fully replace the traditional metering volume, while still adopts the gas volume measurement method in our country at present.
As soon as possible in order to in line with international standards, the introduction, digestion, absorption metering technology of natural gas, which is developing rapidly in recent years become the urgent matter, use the unit can be joint research, research institutes and departments to develop natural gas energy measurement of experimental work, and on this basis to speed up the technology and equipment, measuring instrument and the calculation methods of standardization construction step.
In order to quicken the pace of the development, and suggested that the introduction of foreign advanced online gas chromatography system and flow computer, on the basis of digesting imported technology development suited to China's national conditions of natural gas energy metrology system.
4 conclusion many factors influencing the flowmeter metering error, such as gas composition, pipe roughness measurement, the influence of upstream and downstream users in a different way, and so on.
As a result, not only to solve the above problems, but also to improve the technological process, strengthen the supervision and inspection of measurement, improve the level of business responsible for measurement, familiar with measurement laws and regulations and the provisions of the transfer agreement.
Only in this way, it will eliminate the additional error of measurement of flow meter, improve the measurement accuracy of the standard orifice flow meter.
Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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