Due to the influence of various factors in the production,the graphite tubes are prone to damage and the leakage detection is difficult,so there are high requirements for the quality of tube replacement.

According to the problems discovered at leakage detection of wrapping for GIS switchgear in the process of GIS equipment installation,and combined with the general method of leakage detection of wrapping for GIS switchgear in the project,Beijing Electric Power Co.

This paper introduces a method of leakage detection by utilizing helium mass spectrometer leak detector and the comprehensive treatments based on the leakage detection for the vacuum system of a K-55-8.

According to characteristics of equipments made of titanium-steel and titanium-stainless steel clad plates , associating with production , this paper introduces some methods of leak hunting for the kind of equipment , and briefly analyzes their advantages and disadvantages.

Aiming at the domestic application status of coolant charging-up and existing problems,this paper proposes a dsPIC30F3014 based control system design uses for mobile coolant charging-up device,which adopts microcomputer control based measurement technology and differential pressure leak hunting principle to realize digitalizing ration charging-up and leak hunting.

Application of quadrupole mass spectrometer in vacuum leak detection;

Application of oil-free vacuum leak detection system in space environment simulation test;