8 nitrogen
Molecular formula N2, molecular weight 28.0134 (according to 1979 international atomic weight), colorless, odorless, inert gas. The density is 1.251kg/m3, the melting point is 63.29k, and the boiling point is 77.35k at 101.325kpa. It is a kind of asphyxiating gas because it is not active and can't burn.
9 gaseous nitrogen for industrial use
The nitrogen content of industrial gaseous nitrogen produced by air separation equipment is more than or equal to 98.5% (volume ratio).
10 pure nitrogen
The nitrogen content of nitrogen produced by air separation equipment is more than or equal to 99.995% (volume ratio).
11 high purity nitrogen
The nitrogen content (volume ratio) of nitrogen produced by air separation equipment is greater than or equal to 99.9995%.
12 liquid nitrogen (liquid nitrogen)
Nitrogen in liquid state is transparent and easy to flow. At 101.325kpa, the boiling point is 77.35k and the density is 810kg / m3. Liquid nitrogen can be produced by low temperature air separation equipment or liquefied by gaseous nitrogen.
13 liquid air (liquid air)
The air in liquid state is light blue and easy to flow. At 101.325kpa, the boiling point is 78.8k and the density is 873kg / m3. Liquid air is the intermediate product in the process of air separation.
14 oxygen enriched liquid air
It refers to liquid air with oxygen content more than 20.95% (volume ratio).
15 fraction liquid nitrogen (waste liquid nitrogen)
The liquid with nitrogen content of 95% ~ 96% (volume ratio) is extracted from the proper position of the lower tower.
16 sewage nitrogen
The nitrogen content is 95% ~ 96% (volume ratio) in the upper part of the upper tower.
17 standard state
It refers to the gas state when the temperature is 0 ℃ and the pressure is 101.325kpa.
18 air separation
The process of separating its components from air to produce oxygen and nitrogen and to extract argon, neon, helium, krypton, xenon and other gases.
