LNG气瓶阀门低温气密性检测方法研究

A Review of Low-Temperature Air Tightness Detection Technology of LNG Cylinder Valve

摘要: 本文重点对LNG气瓶附件的气密性测试方法进行了研究，通过分析氦质谱检漏法和常低温压差法两种测试方法的优势和弊端，分析了低温气密性测试的关键技术，提出了具体的改进意见，解决了LNG气瓶附件在−196℃低温下进行气密性检测的技术难题。

Abstract: This article focuses on the gas tightness test of LNG cylinder accessories. Through the analysis of the advantages and disadvantages of two kinds of test methods, helium mass spectrometer leak detection method and normal & low temperature differential pressure method, it analyzes the key technology of the low-temperature air tightness test, puts forward the detailed improvement suggestions, and solves the gas tightness test problem of LNG cylinder accessories under the low temperature of −196˚C.