Brochure

41
GAS PROTECTION ACCORDING TO STANDARD EN
14175
Main groups Percentage composition
Main group Subgroup Oxidizer Inert Reduced
Poorly
reactive
CO
2
O
2
Ar Hey H2 N2
I
1
100
2
100
3
Rest 0.5 <He <95
M1
1
0.5 <CO
2
<5 Rest* 0.5 <H2 <5
2
0.5 <CO
2
<5 Rest*
3
0.5 <O
2
<3 Rest*
4
0.5 <CO
2
<5 0.5 <O
2
<3 Rest*
M2
0
5 <CO
2
<15 Rest*
1
15 <CO
2
<25 Rest*
2
3 <O
2
<10 Rest*
3
0.5 <CO
2
<5 3 <O
2
<10 Rest*
4
5 <CO
2
<15 0.5 <O
2
<3 Rest*
5
5 <CO
2
<15 3 <O
2
<10 Rest*
6
15 <CO
2
<25 0.5 <O
2
<3 Rest*
7
15 <CO
2
<25 3 <O
2
<10 Rest*
Main groups Percentage composition
Main group Subgroup Oxidizer Inert Reduced
Poorly
reactive
CO
2
O
2
Ar Hey H2 N2
M3
1
25 <CO
2
<50 Rest*
2
10 <O
2
<15 Rest*
3
5 <CO
2
<25 2 <O
2
<10 Rest*
4
25 <CO
2
<50 10 <O
2
<15 Rest*
5
25 <CO
2
<50 10 <O
2
<15 Rest*
VS
1
100
2
Rest 0.5 <O
2
<30
R
1
Rest* 0.5 <H2 <15
2
Rest* 0.5 <H2 <50
NOT
1
100
2
Rest* 0.5 <N2 <5
3
Rest* 5 <N2 <50
4
Rest* 0.5 <H2 <10 0.5 <N2 <5
5
- 0.5 <N2 <5 Rest*
* In this classification, argon can be partially or fully replaced by helium.