液化天然气加气机检定中的常见问题及解决办法

Abstract： As a measuring instrument for the trade setlement of liquefied natural gas （LNG），the metrological performance ofLNG dispensers is not only closely related to theeconomic benefitsof enterprises，but alsodirectly affects the rights and interests of consumers. Only by continuously improving the accuracy of measurement can we effectively promote the healthy development of the industry.Arelatively complete system has been established for the metrological verificationofLNG dispensers in China.However，during the specific verification operation，some problems and deficiencies stillemerge in the actual operation process.Through in-depth exploration of the basic principles of LNG dispensersand the operation characteristics of the equipment，accurately grasping the metrological verification methods and keypointsofLNG dispensers is the keyto ensuring that the metrologicalperformance of the equipment meets the needs of production and daily life.

Keywords： liquefied natural gas （LNG） dispensers;measurement; verification

0 引言

液化天然气是天然气经压缩、冷却至其冷凝点 （-161.5∘C ）后转变而成的液体，主要成分是甲烷，通常储存在 -162∘C 左右的低温储存罐内，相对于普通的压缩天然气，液化天然气能够在低温、低压的条件下更便捷地进行运输和加注作业。（剩余3945字）