天然气孔板流量计的测量精度分析

Analysis of measurement accuracy of natural orifice plate flowmeter

孔板流量计是一种广泛应用于石化工业的流量测量仪表。目前天然气计量己制定了许多相关的国家标准,行业标准和计量检定规程等,但尚未形成完整体系,与国外相比尚有较大差距。本文主要探讨了天然气孔板流量测量中准确度要求,分析了影响测量不确定度的几种因素,提出引起流量测量误差的各种原因,这对于孔板流量计的使用具有一定的指导作用。

Orifice plate flowmeter is a flow measuring instrument which is widely used in petrochemical industry.At present,the natural gas measurement has made a lot of relevant national standards,industry standards and metrological verification regulations,but has not yet formed a complete system,compared with foreign countries there is a big gap.This paper mainly discusses the requirement of the accuracy of natural orifice flow measurement,analysis of the impact of several factors of uncertainty in measurement,put forward the various causes of flow measurement error,which is of certain guidance for the use of orifice flowmeter.