Pre-cooling scheme before LNG flow measurement

Abstract: The information on the pre-cooling scheme before LNG flow measurement is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. 1. Pre-cooling with low-temperature nitrogen (1) Check the integrity of the unloading metal hose, and there is no rain, garbage and other sundries in the pipe. Connect the metal hose to the tanker and check that the connection is secure. (2) Open the tanker self-supercharger (or use the unloading supercharger) to make the tank. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details of the pre-cooling scheme before LNG flow measurement. 1. Pre-cooling with low-temperature nitrogen (1) Check the integrity of the unloading metal hose, and there is no rain, garbage and other sundries in the pipe. Connect the metal hose to the tanker and check that the connection is secure. (2) Open the tanker self-supercharger (or use the unloading supercharger) to increase the tanker pressure to 0.3MPa. Slowly open the gas phase valve of the tanker and check for leaks at the hose connections. (3) Slowly pour low-temperature nitrogen into the storage tank, and wait until the pressure of the storage tank rises to about 0.2MPa. Close the unloading valve of the unloading platform, and after the storage tank is kept cold for 15 minutes, open the full valve of the storage tank to discharge nitrogen, and the process is repeated. (4) Determine the internal temperature of the storage tank, release the gas through the full valve, and measure it with a thermometer. When the gas temperature reaches the expected value (-70°C～-100°C), the gas pre-cooling work is completed. 2. Liquid nitrogen pre-cooling (1) Vent the pressure of the storage tank to a slight positive pressure, and close the lower inlet valve. Close the level gauge balance valve and use the level gauge. (2) Slowly open the liquid phase valve of the tanker to a small opening, and slowly close the gas phase valve of the small tanker, so that the liquid nitrogen is fed from the upper part of the storage tank. Control the valve opening of the unloading platform to keep the pressure at 0.3MPa. When the pressure of the storage tank rises to 0.2MPa ~ 0.3MPa, the valve of the unloading platform should be closed in time, and the gas phase of the storage tank should be opened to manually vent the pressure, and repeat this operation. (3) Listen carefully to the sound in the storage tank and observe the pressure of the storage tank at the same time. When the sound decreases and the pressure no longer rises, slowly open the front and rear valves of the liquid inlet emergency shut-off valve at the bottom of the storage tank, and feed liquid up and down at the same time. During the liquid feeding process, the pressure of the storage tank should be closely observed and recorded to prevent the pressure from rising. When the pressure rises, the liquid outlet valve of the tanker should be closed in time, and the gas phase of the storage tank should be opened to manually vent the pressure. (4) When the liquid level gauge of the storage tank reaches a certain value (generally 20% of the storage tank), the liquid feeding ends. (5) After the liquid feeding task is completed, close the liquid phase valve of the tanker, open the gas phase valve of the tanker, and purge the liquid discharge pipeline to the storage tank. (6) Close the tank truck valve and the unloading platform unloading valve, and remove the hose. After closing the unloading platform valve, the liquid between the valve and the check valve should be emptied. (7) Close the gas phase manual vent valve of the storage tank and the stop valve in front of the emergency shut-off valve for liquid inlet at the lower part of the storage tank. The inlet valve on the upper part of the storage tank is closed after the unloading LNG pipeline returns to normal temperature. (8) Use the liquid nitrogen in the storage tank to pre-cool the supercharger, air-bath vaporizer and other low-temperature pipelines. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Pre-cooling scheme before LNG flow measurement'

Most people who see a in operation for the first time are amazed at how well the insertion ultrasonic flow meter is managed.

And finally, if you want to find additional resources for mass flow meter, simply go to Sincerity Flow Meter for more.

While the productivity and efficiency benefits of automation are unequivocal for manufacturing mass flow meter, the need for skilled humans to operate, utilize and advance technologies is equally unmistakable.

Beijing Sincerity Automatic Equipment Co., Ltd knows how important it is to offer optional extras, such as mass flow meterlow flow turbine flow meter to provide quality products for customers.