MONITORING OF SEALED AND THERMALLY INSULATED VAT Russian patent published in 2018 - IPC F17C13/12 

FIELD: measurement technology.

SUBSTANCE: method for monitoring sealed and thermally insulated vat (1) intended to hold low-temperature liquefied fuel gas, in which a wall of the vat comprises thermally insulated barrier (3) arranged between the sealing membrane and the bearing wall, the thermally insulated barrier comprising solid insulation materials and a gas phase maintained at a negative relative pressure, the method comprising obtaining a diluted gas sample by collecting a sample of the gaseous phase at the negative relative pressure in the thermally insulated barrier through collection tube (11) and by the addition of a controlled quantity of an inert gas to the gaseous phase to be collected or that has been collected, raising the pressure of the diluted gas sample to an operating pressure of gas analyser (25), and measuring concentration of the fuel gas in the diluted gas sample with the gas analyser.

EFFECT: method is proposed for monitoring a sealed and thermally insulated vat.

23 cl, 7 dwg