What is the standard condition for natural gas?
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Generally, 0°C and 1 atmosphere are used as the standard conditions in design work. However, I’ve heard that for natural gas, the standard condition is not 0°C but 20°C. What is the basis for this? Thank you!
The standard conditions mentioned in textbooks and data represent an ideal condition in physical chemistry. In design, they are generally set at 1 atmosphere pressure and 20 or 25°C, which corresponds to the room temperature specified in textbooks.
There are three standards for the standard state: 1. The standard set by the International Metrological Conference: 0°C, 101.325 kPa (1 atm). 2. The standards adopted by the International Organization for Standardization and the United States: 15°C, 101.325 kPa (1 atm). 3. China’s standard: 20°C, 101.325 Pa. Since 1993, China has specified that the standard state for measuring gas volumetric flow rates is 20°C, 100 Pa
Currently, the measurement of natural gas is based on conditions at 20°C and 1 atmosphere pressure, which we use as the standard. Physicochemically, it is referenced at 0°C and 1 atmosphere. For details, see the explanation in GB17820 \"Natural Gas\"