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Natural gas flowmeter calibration method

A flowmeter calibration, natural gas technology, applied in testing/calibration devices, testing/calibrating volume flow, liquid/fluid solid measurement, etc. , to achieve the effect of shortening the comparison chain, improving the accuracy, and reducing the degree of influence

Active Publication Date: 2022-08-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a natural gas flowmeter calibration method, which can solve the problem that the current commonly used natural gas flowmeter calibration method is in the lower comparison chain layer due to the long comparison chain. Its uncertainty is greatly affected by the comparison chain, and the accuracy is poor

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  • Natural gas flowmeter calibration method

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Embodiment Construction

[0075] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0076] figure 1 It is a flow chart of a natural gas flowmeter calibration method provided by an embodiment of the present invention, and the natural gas flowmeter calibration method includes:

[0077] 101. Obtain the flow rate measured by the primary standard unit 12, the gas operating density and the output frequency of the first transfer turbine unit 11.

[0078] Wherein, the primary standard unit 12 may be a primary standard of natural gas flow based on a mass-time method, for example, the uncertainty of the primary standard may be 0.05%-0.07%.

[0079] The first transfer turbine unit 11 is used as a transfer standard between the primary standard unit 12 and the unit to be tested 24 to realize the traceability of the unit to be tested 24 ...

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Abstract

The invention discloses a natural gas flowmeter calibration method, which belongs to the technical field of flowmeter calibration. The invention is based on the in-line calibration module, and uses the primary standard unit to calibrate the first transmission turbine unit; based on the loop calibration module, uses the second transmission turbine unit to calibrate the unit to be tested. The comparison chain of the calibration process is shortened, the degree of influence of the uncertainty of the unit to be checked by the comparison chain is reduced, and the accuracy of the calibration result is improved.

Description

technical field [0001] The invention relates to the technical field of flowmeter calibration, in particular to a natural gas flowmeter calibration method. Background technique [0002] According to national calibration regulations, all natural gas flow meters for custody transfer need to be sent to a natural gas flow meter calibration facility for calibration. [0003] At present, the natural gas flowmeter calibration system often used by calibration institutions includes: a loop calibration module and a straight row calibration module. The loop calibration module is used to trace the flow value of the flowmeter to be tested to the transmission turbine unit; the straight row calibration module is used for It is used to trace the flow value of the transmission turbine unit to the sonic nozzle unit; the in-line calibration module is also used to trace the flow value of the sonic nozzle unit to the original standard unit. Based on the traceability of the comparison chain layer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/32G01F25/10
CPCG01F1/325G01F25/13G01F25/15
Inventor 段继芹任佳彭利果樊兰蓓陈琦闵伟万元周黄敏陈晓科周桂荣
Owner PETROCHINA CO LTD