| 摘要 |
Methods have been proposed for the detection of cracks occurring in the lining comprising passing a purging gas, for example nitrogen, through a channelled layer in the heat-in-sulating to a gas analyzer. Contamination of the purging gas by the contents of the tank, which can be detected by the gas analyzer, indicates the presence of a crack in the heat-insulating lining. The invention is directed to an improved design of the channelled layer, so that a uniform distribution of the purging gas along an area to be watched for the development of cracks is obtained.
|
