| 摘要 |
PROBLEM TO BE SOLVED: To provide a leakage detecting method and a leakage detecting apparatus capable of speedily and accurately detecting the presence or absence of a gas leakage and the position of the leakage due to the breakage of an outer steel shell of gas transmission piping or an air heating furnace. SOLUTION: (1) The gas leakage detecting method is used for times when the outer steel shell of a gas transmission pipe or the air heating furnace in which an outer circumferential part is covered with a sheathing material is broken. The temperature between the outer surface of the pipe or the outer steel shell and a sheathing material is measured. When either or both of a temperature measurement value and the amount of temperature change lie outside a predetermined range, the gas leakage is determined in the method and the apparatus for detecting the leakage of gaseous matter. (2) By performing the measurement (1) at a plurality of locations between the outer surface of the pipe or the outer steel shell and the sheathing material, the position of the leakage is detected in the method and the apparatus for detecting the position of the leakage. COPYRIGHT: (C)2005,JPO&NCIPI
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