HELlUM (He)
General
Helium is a highly inert gas found in nature in limited quantities. It is colourless, odourless, non-flammable & non-toxic. Liquid Helium is the coldest known substance with boiling point of -269 degree C. Special transportation and storage equipment is required for minimizing losses of the product.
Applications
Helium is the second element in the periodic table and owing to its nonflammable nature & lightweight, replaces Hydrogen in the metrological applications. Helium is used in numerous other applications in line with its highly inert & stable characteristics. Major applications are as under:
- Magnetic Resonance Imaging (MRI)
- Fibre Optics
- Balloon Filling
- Research & Development
- Deep Sea Diving
- Space Exploration
- Analytical Applications
- Leak Detection
Specifications
| Purity |
Impurities |
||
| Moisture | Oxygen | ||
| Research Grade | 99.9996% | < 2 ppm | < 0.5 ppm |
| Highly Purified | 99.999% | < 3 ppm | < 1ppm |
| High Purity | 99.95% | < 2 ppm | < 5 ppm |
| Balloon Grade | 99.99% | < 5 ppm | < 8 ppm |
Packing Details
| Capacity |
Gas Contents (m3 per unit) |
Pressure (bars) |
|
| Cylinders | 40 L 50 L |
6.0 10.0 |
150 200 |
| Racks | 12 cyl/rack 16 cyl/rack 54 cyl/rack |
120.0 160.0 540.0 |
200 200 200 |
Conversion Factor
1Nm3=
| 0.17847kgs | 0.3935 lb |
| 0.3775 USG | 1.4289 litres |
Physical Constants
| Molecular Weight | 4.00 |
| Boiling Point @ 1atm | -452 Deg F (-268.9 deg C) |
| Freezing/Melting Point | None |
| Specific Gravity | 0.138 |
| Flammability Limit | Non Flammable |
| Autoignition Temperature | Non Flammable |
Transportation Information
| DOT Hazard Class | 2.2 |
| DOT Identification Number | UN 1046 |
| DOT/IMO Name | Helium, compressed |
| Shipping Label | Non Flammable gas |