Balloon helium high purity helium balloon helium manufacturer - Yuejia gas

  Molecular weight of helium: 4
0026
Melting point (2555kpa): , - 272
1℃
Boiling point (101
325kpa): , - 268
94℃
Liquid density (4
20k, 100
312kpa): 125
2kg/m3
Helium density (0 ℃, 101
325kpa): , - 0
1785 kg/m3
Relative density (gas, 0 ℃, 101
325kpa): 0
138
Specific volume (21
1 ℃, 101
325kpa): 6
0304 m3 / kg
Gas liquid volume ratio (15 ℃, 100KPA): , 748 L/L
Critical temperature: , - 268
0℃
Critical pressure: , 229 kPa
Critical density: & 69
3 kg/m3
Melting heat (1
2k, 2555kpa): 0
0836kj/kg
Gasification heat (- 268
926 ℃, 101
325kpa): 20
42 kJ / kg
Specific heat capacity (gas, 25 ℃, 101
325kpa): CP = 5238
3 J / (kg & middot; K) CV = 3213
7j / (kg & middot; K)
Specific heat ratio (gas, 25 ℃, 101
325kpa): CP / CV = 1
63
Vapor pressure (0
5K): , 0
0000022kPa  (2
0K)：3
17kPa  (5
0K)： 197
1 kPa
Viscosity (0 ℃, 101
325kpa): 0
01864 MPa & middot; S
(liquid, 3
0k): 0
0033 MPa & middot; S
Surface tension (4
2K): 0
096 Mn / M
Thermal conductivity (0 ℃, 101
325kpa): 0
1426 w / (M & middot; K)
  (liquid, 2
4k): 0
01883 w / (M & middot; K)
Refractive index (gas, 0 ℃, 101
325kpa): one point zero zero zero zero three five
Helium is colorless, tasteless and odorless
It is an inert gas in gaseous state at normal temperature
Its critical temperature is low
It is a difficult liquefied gas found in nature
Its chemical properties are extremely inactive, and it cannot burn or support combustion
The content of helium in the air is about 5
2 parts per million
Helium is indispensable in conductor applications widely concerned in the fields of suspended trains and so on
In addition, helium is commonly used as a gas in advertising balloons because of its inactive chemical properties and lighter than air
In the mixed gas for breathing in the field of marine development and the use of conductive magnet cooling of nuclear magnetic resonance imaging equipment in the medical field,
It is used as the filling gas of helium balloon (Industrial helium) to replace its highly combustible hydrogen
It is used as the gas of carbon dioxide cutting machine together with high-purity carbon dioxide and high-purity nitrogen
Superconducting magnet of liquid helium for nuclear magnetic resonance imager
Breathing gas used in deep-sea operation together with medical oxygen
Leak detection gas for helium leak detector in air conditioning field
Used as shielding gas for special welding together with high-purity argon
High purity helium laboratory high purity helium helium manufacturers sell helium directly
For more details, please pay attention to Yuejia gas: http://www
51qiti
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