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Refilling of Advertising Ballon (Helium):
Physical Properties:
| Molecular Weight |
4.003 kg/kmol |
| Critical Temperature |
-268.0 °C |
| Critical Pressure |
2.2 bar |
| Boiling point at 1.013 bar |
-268.9 °C |
| Gas density at 1.013 bar |
0.169 kg/m3 |
| Relative gas density to air = 1 |
0.138 |
| Compressibility at 1.013 bar |
1.00 |
Cylinder
Data:
| Colour |
body - brown |
| Valve |
right hand - conforming to IS 3224 |
| Water capacity |
47 / 50 ltrs. (standard) |
Gas
Specifications:
| GRADE |
MAXIMUM LEVEL OF CRITICAL IMPURITIES (PPM BY VOLUME) |
|
O2 |
H2O |
THC |
CO + CO2 |
| Helium I |
5.0 |
5.0 |
0.5 |
ND |
Some
typical applications:
- Carrier gas in gas chromatography
- In laser mixtures
- Pressurizing
gas
- Helium leak detectors
- Breathing gas for divers
- Insert shielding gas for arc
welding
- In neon signs.
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