本文通过回归分析,给出了美国热交换学会(H·E·I)推荐的真空系统允许漏气量的数学模型。并在实验的基础上,造一步阐述了真空法检漏与正压法检漏漏气量换算等效公式的适用范围和正确性。在上述论证的基础上,建立了粗低真空系统正压法检漏允许漏气量基准。 Through the regression analysis, this paper gives a mathematical model of the allowable blow-by volume of the vacuum system recommended by the American Heat Exchange Society (H · E · I). And on the basis of experiment, a step-by-step expounding the scope and correctness of vacuum equivalent method of leakage leakage and positive pressure method of leakage detection. On the basis of the above argument, a baseline test of allowable air leakage for positive pressure method of rough vacuum system was established.