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1. Unit of measurement for natural gas
The unit of measurement for natural gas used by residents is the standard cubic meter. The standard cubic meter is a unit of measurement for gas flow meters and is often referred to as a pseudo mass unit because it appears to be a volume unit, but actually gives way to a mass unit. It has nothing to do with the pressure or temperature at the place of use, so it is generally used in the chemical industry to calculate the molar or mass of gases involved in chemical reactions. If the gas is natural gas, the mass of 1 standard cubic meter is also related to the composition of natural gas. It is reasonable to use energy units in natural gas trade settlement measurement because the same natural gas mass, if its composition is different, will also have different heat generation. Additional Information: Introduction to Natural Gas Conversion:
1. 1 kg of liquefied natural gas=1.4-1.5 cubic meters of natural gas (standard condition gas)
2. 1 cubic meter of natural gas (standard condition gas)=0.7256 kg of liquefied natural gas
3. 1 cubic meter of liquefied natural gas (LNG) can gasify 600-625 cubic meters of natural gas (standard condition gas)
4. The mass of 1 cubic meter of liquefied natural gas is about 430-470 kg
5. 1 liter of liquefied natural gas=0.001 cubic meters of liquefied natural gas=0.625 cubic meters of natural gas (standard condition gas)
6. 1 1 liter of liquefied natural gas=0.001 cubic meters of liquefied natural gas, with a mass of 0.43-0.47 kilograms
7. 1 liter of natural gas (with a rolling pressure of 20MPa)=0.001 cubic meters of natural gas (with a pressure of 20MPa)=0.208 cubic meters of natural gas (in standard gas s
2. Is there a regulation on the calibration period of LNG refueling station supporting equipment?
There is a clear calibration period for LNG refueling station supporting equipment. As specified, different types of equipment with different power dispatch and start-up requirements correspond to different calibration periods..
1. Mandatory Verification Equipment for Trade Settlement 1 LNG dispenser flowmeter: including mass flowmeter, volume flowmeter and other types, with a calibration cycle of 6 months. Due to the involvement of trade settlement, it belongs to the mandatory calibration category.
2. Safety Monitoring Equipment 1 Combustible gas alarm Xianchun: The calibration cycle shall not exceed 12 months, and the matching probe shall be regularly position calibrated.
III. Pressure Instrumentation Equipment 1 According to the range classification management, pressure instruments above 25MPa need to be checked quarterly.
3. How to inventory LNG storage tanks
LNG storage tank inventory needs to be achieved through a combination of static measurement and dynamic verification. The core is to accurately collect liquid level, temperature, and pressure data, and convert them into quality data based on density and volume tables.
. 1. The preparation team needs to be equipped with technical personnel, metrologists, and safety supervisors who are familiar with tank operations, calibrate tools such as level gauges and thermometers, and retrieve tank volume tables and historical operation records to ensure consistent measurement baselines. 2. Static measurement execution • Level data: The level height is collecte
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