초록 ▼

A method of the present invention automatically detects gas leak from a valve on a gas-containing vessel, or the like, based on detected absolute pressure and pressure fluctuation. The method can detect both fine leak and gross leak. The method comprises a method for automatically detecting gas leak

A method of the present invention automatically detects gas leak from a valve on a gas-containing vessel, or the like, based on detected absolute pressure and pressure fluctuation. The method can detect both fine leak and gross leak. The method comprises a method for automatically detecting gas leak from a target object provided on gas piping comprising the steps of: issuing command for forming an airtight room communicating with said target object; issuing command for pressurizing said airtight room until a predetermined pressure; detecting absolute pressure and pressure fluctuation of said airtight room, measured with a gauge; and discriminating whether gas leaks from said target object or not based on the detected absolute pressure and pressure fluctuation.

대표청구항 ▼

[ What are claimed are:] [14.] A method for automatically detecting gas leak from a connector detachably connecting a gas pipe from a valve on a gas-containing vessel, comprising the steps of:issuing command for creating an airtight room, formed by closing at least two valves, and communicating with

[ What are claimed are:] [14.] A method for automatically detecting gas leak from a connector detachably connecting a gas pipe from a valve on a gas-containing vessel, comprising the steps of:issuing command for creating an airtight room, formed by closing at least two valves, and communicating with said connector and with said valve via said gas pipe;issuing command for evacuating said airtight room;issuing command for introducing gas into said airtight room after evacuation is stopped;detecting a change of absolute pressure and a monitored range of pressure fluctuation measured with a pressure gauge provided in said airtight room over a specified time period containing said gas while keeping said airtight room being hermetic; anddiscriminating whether gas leaks from said connector or not based on the detected said change of absolute pressure and said monitored range of pressure fluctuation.