Hydrogen (H2)
DESCRIPTION (Hydrogen):
Hydrogen is a colorless, odorless gas. It is shipped
in gaseous form with cylinder pressures of approximately 2000 psig @70° F. Typically used
in synthesis of Ammonia, petroleum refining operations, rocket fuels, the prevention of
oxidation of certain metals during heat treating and some cutting and welding of metals.
PHYSICAL CONSTANTS (Hydrogen):
| Molecular Weight: |
2.016 |
| Specific Volume @ 70° F., 1
atm.: |
191.7 cu.ft/lb |
| Boiling Point @ 1.0 atm. : |
-423.2° F |
| Triple Point @ 0.0695 atm: |
-434.7° F |
| Specific Gravity, Gas @ 75°
C., 1 atm. (Air = 1): |
0.06952 |
| Density, Gas @ 0° C., 1 atm.: |
0.0899 g/l |
| Density, Liquid @ -253° C., 1
atm.: |
0.0708 g/l |
| Critical Temperature: |
-400.° F |
| Critical Pressure: |
188.2 psia |
| Critical Density: |
0.03136 g/ml |
| Latent Heat of Vaporization @
b.p.: |
106.5 cal/g |
| Latent Heat of Fusion @ t.p.: |
13.875 cal/g |
| Flammable Limits in Air: |
4.0-75% by volume |
| Autoignition Temperature: |
1085° F |
| Specific Heat, Gas @ 0-200°
C., 1 atm. Cp: |
3.44 cal/(g)(° C) |
| Specific Heat, Gas @ 25° C.,
1 atm. Cv: |
2.46 cal/(g)(° C) |
| Specific Heat Ratio, Gas @
0-200° C., 1 atm., Cp/Cv: |
1.40 |
| Thermal Conductivity, Gas @
0° C. : |
0.000040 cal/(sec)(cm2 )(° C/cm) |
| Viscosity, Gas @ 15° C., 1
atm. : |
0.0087 centipoise |
| Solubility in Water @ 0° C.,
1 atm. : |
0.019 volumes/volume H2O |
CYLINDER CONNECTIONS
(Hydrogen):
Standard CGA V-1 Cylinder Connection up to 3000 psig: CGA 350
Standard CGA V-1 Cylinder Connection 3001 - 5500 psig: CGA 695
Standard CGA V-1 Cylinder Connection 5501 - 7500 psig: CGA 703
Standard CGA V-1 Cylinder Connection Ultra High Integrity: CGA 724
|
