气罩积分法正压检漏的候检时间

Waiting Time of Leak Hunting in Pressure Leak Hunting Mode with Integration Method in Gas Hood

用气罩积分法对压力容器及管路的接头或法兰进行正压检漏时，如果忽视了接头寄生容积的影响，将导致漏率测量失败。因此，提出用增加足够的“候检时间”以排除这种影响，解决了候检时间的计算方法。并提出当需要的候检时间太长，工程上不易实施时，可以用提高检漏要求（减小检漏的合格漏率），来得到合理的检漏结果。

When carrying out a pressure leak hunting to a joint or a flange of a pressure vessel or a pipeline with integration method in gas hood, ignoring the effect of parasitic volume would lead to the rate measurement failure.A method of calculation of the waiting time of leak hunting is represent in this paper to remove the effect by increasing enough waiting time. Meanwhile it is predicted in the paper that raising the claim of a leak hunting(i.e.decreasing the qualified leak rate of a leak)can get a rational result leak hunting when the waiting time is too long to be realized in engineering.