Liquid nitrogen is used as refrigerant, and (after gasification) for purposes of gaseous nitrogen.
Nitrogen may be used as a protective medium for vacuum packaging food products.
|
№№ p / p |
The name of indicators |
brand 5.0 |
|
|
I |
II |
III |
|
|
1 |
Volume fraction of nitrogen,%, not less |
99,999 |
|
|
2 |
The volume fraction of oxygen,%, no more |
5∙10-4 |
|
|
3 |
The volume fraction of the hydrogen% max |
1∙10-4 |
|
|
4 |
Volume fraction of carbon oxide,%, no more than** |
5∙10-5 |
|
|
5 |
Volume fraction of carbon dioxide,%, no more than** |
5∙10-5 |
|
|
6 |
The volume fraction of methane,%, no more than** |
5∙10-5 |
|
|
7 |
The volume fraction of water vapor in nitrogen gas,%, no more than |
5∙10-4 |
|
|
8 |
Oil content, solids and water in liquid nitrogen |
It withstands the test of paragraph 4.8. |
Note:
** It is allowed in nitrogen instead of 5.0 brand figures 4, 5, 6 of Table 1 indicate the volume fraction of the amount of carbon-containing compounds based on the CH4
