LNG precooling plan before the flow measurement

Abstract: LNG precooling plan before the flow measurement information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. A, with cryogenic nitrogen precooling first ( 1) Check the unloading metal hose in good condition, tube without rain, garbage and other debris. The metal hose is connected to the tank, and check whether the connection is firm. （ 2) Open the tank lorry since the supercharger ( Or use unloading supercharger) , make the slot. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the LNG precooling scheme article details before the flow measurement. A, with cryogenic nitrogen precooling first ( 1) Check the unloading metal hose in good condition, tube without rain, garbage and other debris. The metal hose is connected to the tank, and check whether the connection is firm. （ 2) Open the tank lorry since the supercharger ( Or use unloading supercharger) , make the tank pressure to zero. 3MPa。 Slowly open the tank lorry gas valve, check the hose joint leaks. （ 3) To the storage tank slowly into cryogenic nitrogen gas, wait for tank pressure rise to 0. About 2 mpa. Close the unloading liquid discharge valve, the tank cover cold after 15 min, open the full tank test valve, discharge of nitrogen, the process is repeated. （ 4) Internal temperature of the tank, judged by measuring gas valve, thermometer is used to test, when the gas temperature reaches the expected value (after - 70° C～- 100° C) Gas precooling the work is done. Second, the liquid nitrogen precooling ( 1) Will vent to micro positive pressure tank pressure, closed lower into the liquid valve. Close the liquidometer balance valve and putting-in-service proactively level gauge. （ 2) Slowly open the tank to a small open of the liquid valve, slow down the tanker gas valve, make the upper liquid nitrogen from the storage tank into the liquid. Control the unloading valve opening, to keep the pressure on 0. 3MPa。 Such as tank pressure to zero. 2MPa～0. Three mpa, in a timely manner to close the unloading valve, open the tank gas phase manual vent pressure, do this over and over again. （ 3) Fine listen to the voice of the storage tank and observation tank pressure at the same time, such as voice, pressure rise, no longer can slowly open the tank bottom into the liquid before and after the emergency cut-off valve valve, up and down into the liquid at the same time. Into the liquid to close observation records during the process of storage tank pressure, prevent the pressure. Pressure tank lorry to timely turned off at the end of the valve of produced liquid, at the same time open the tank gas vent pressure manually. （ 4) Storage tank of liquid level meter reaches a certain value, Generally 20% of the storage tank) , into the fluid end. （ 5) Liquid into the task is completed, shut off the tank liquid valve, open the tank lorry gas valve, to purge tank discharging liquid pipeline. （ 6) Liquid discharge valve closed tank lorry and unloading valve, remove hose. Shut down after unloading station valve between the valve and check valve should be liquid emptying. （ 7) Close the tank gas phase manual vent valve, liquid storage tank bottom in emergency cut-off valve before cut-off valve. Tank top into the liquid valve closed again after unloading LNG pipeline recovery room temperature. （ 8) Use of the storage tank of liquid nitrogen for the supercharger, empty bath type evaporator and other low temperature pipes to precooling. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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