Technical Index
| Item |
Index |
| Top quality |
First quality |
Qualified products |
| Purity of nitrogen gas,10-2( V/V) ≥ |
99.5 |
99.5 |
98.5 |
| Oxygen content, 10-2( V/V) ≤ |
0.5 |
0.5 |
1.5 |
| Water content |
Free water, ml/bottle≤ |
- |
ÎÞ |
100 |
| Dew point,°C ≤ |
-43 |
- |
Quality of pure nitrogen should be in accordance with national standard GB/T8979-1996
Technical Index
| Item |
Index |
| Top quality |
First quality |
Qualified products |
| Purity of nitrogen gas, 10-2( V/V) ≥ |
99.996 |
99.99 |
99.95 |
| Oxygen content, 10-6( V/V) ≤ |
10 |
50 |
500 |
| Hydrogen content, 10-6( V/V) ≤ |
5 |
10 |
- |
| Content of carbon monoxide, 10-6 ( V/V) ≤ |
5 |
5 |
- |
| Content of carbon dioxide, 10-6( V/V) ≤ |
5 |
10 |
- |
| Content of methane, 10-6( V/V) ≤ |
5 |
5 |
- |
| Water content, 10-6 ( V/V) ≤ |
5 |
15 |
20 |
Nitrogen gas purity contains small amount of inert gases such as nitrogen, neon and argon.
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