METHOD OF LIQUEFIED GAS WEIGHING IN DRAINAGE HOSE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2015 - IPC G01F1/34 

FIELD: oil-and-gas industry.

SUBSTANCE: method of liquefied gas weighing used for temperature and pressure in tank measurement, for substance release from the tank and for monitoring of time of substance release from the tank via the nozzle, and for tank pressure change. Substance is weighed as per the gas dynamic ratios. At that according to the invention the geometric dimensions of the internal cavity of the drain hoses is measured, flowrate factor of the nozzle is determined based on the reference data, temperature in the truck tank is measured, liquefied gas composition is determined according to the quality passport. Density of the vapour phase of the liquefied gas is calculated as for double phase system according to rule of additivity for the definite composition and measured temperature. Liquefied gas is released from the vapour phase hose and drain hose via the nozzle under supercritical and subcritical flow. Authenticity is checked for the flowrate factor determination by ratio of weight passing via the vapour phase nozzle to weight in vapour phase hose prior to flow. Weights passing through the nozzle from the vapour phase hose and drain hose are compared, and difference determines weight of the liquid phase of the liquefied gas in the drain hose.

EFFECT: measurement of the liquefied gas flowrate from the drain hose via the nozzle during flow under various pressure.

2 cl, 1 dwg, 3 tbl