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原油管道输送的流量计运行时,必须在规定流量范围允许的基本误差内工作。为使达到计量的精度及交接计量的准确,目前多采用固定式标准体积管对流量计进行的定期检定。该标准装置复现性好,精度高,适用于交接量较大的泵站。文章从标准体积管的设置费用、使用频度、人员管理及保证计量准确性诸因素考虑,对无固定式标准体积管的中小型原油计量站,提出了设置高精度标准流量计的建议。文中对标准流量计的选用、检定及如何用标准流量计来标定在线流量计作了介绍。
Crude oil pipeline transport flowmeter operation, must be within the scope of the provisions of the flow of the basic error allowed to work. In order to achieve the accuracy of measurement and transfer measurement accuracy, the current use of fixed standard volume tube on the flow meter for regular verification. The standard device has good reproducibility and high precision, which is suitable for pump stations with larger delivery volume. The article puts forward the suggestion on setting up a standard high precision flowmeter for small and medium sized crude oil metering stations without fixed standard volumetric tubes, considering the factors of installation cost, frequency of use, personnel management and measurement accuracy of standard volumetric tubes. The paper introduces the selection and verification of the standard flowmeter and how to calibrate the online flowmeter with the standard flowmeter.