20
LEL France
LEL
Germany
UEL
Density
Standard coef.
Range coef.,
'All gases'
German
standard coef.
German coef.,
'All gases'
Ethyl acetate
C4H8O2
2.10%
2.20%
11.50%
3
1.70
1.05
1.62
1.00
Acetone
C3H6O
2.15%
2.50%
13%
2.1
0.00
0.00
0.00
1.05
Acetylene
C2H2
1.50%
2.30%
100%
0.9
0.00
0.00
0.95
0.60
Butadiene
C4H6
1.40%
1.40%
16.30%
1.85
0.00
1.00
0.00
1.00
Butane
C4H10
1.50%
1.40%
8.50%
2
1.91
1.20
2.00
1.25
Butanone
C4H8O
1.80%
1.80%
11.50%
2.5
0.00
1.35
0.00
1.40
Cyclohexanone
1.00%
0.00
2.50
Dimethyl ether
C2H6O
3.00%
2.70%
27.00%
1.6
0.00
0.00
2.10
1.30
Prem.petrol/gasoline
Mixture
1.10%
0.60%
? 6 %
3 à 4
3.15
2.00
4.50
2.80
Ethanol
C2H6O
3.30%
3.10%
19.00%
1.6
1.66
1.05
1.77
1.10
Ethylene
C2H4
2.70%
2.30%
34.00%
0.98
0.00
0.80
0.00
0.95
LPG
Prop+But
1.65%
1.65%
? 9.0 %
1.85
2.30
1.45
2.30
1.45
Gas oil
Mixture
0.60%
0.60%
? 6.0 %
> 4
0.00
3.90
5.00
3.10
Natural gas
CH4
5.00%
4.40%
15.00%
0.55
1.05
1.05
1.15
0.75
Hexane
C6H14
1.20%
1.00%
7.40%
3
0.00
0.00
2.50
1.55
HB26
H2
4.00%
4.00%
75.60%
0.069
1.10
0.70
1.10
0.70
Isobutane
C4H10
1.50%
1.30%
? 15 %
2
0.00
1.25
2.25
1.40
Isopropanol
C3H8O
2.15%
2.00%
13.50%
2.1
2.26
1.40
2.40
1.50
Kerosene (JP4)
C10 - C16
0.70%
0.70%
5.00%
> 4
5.00
3.15
5.00
3.15
Methane
CH4
5.00%
4.40%
15.00%
0.55
1.00
1.00
1.14
0.75
Methanol
CH3OH
5.50%
5.50%
44.00%
1.1
1.60
1.00
1.60
1.00
Methyl amine
CH3NH2
4.90%
4.20%
20.70%
1.1
2.00
1.25
2.30
1.45
Octane
C8H18
1.00%
0.80%
6.00%
3.9
2.46
1.55
3.00
1.90
Propylene oxide
C3H6O
2.30%
1.90%
?
2
0.00
0.00
0.00
1.90
Ethylene oxide
C2H4O
2.60%
2.60%
100%
1.5
0.00
1.65
0.00
1.65
Pentane
C5H12
1.40%
1.40%
8.00%
2.5
2.10
1.30
2.10
1.30
Propane
C3H8
2.00%
1.70%
9.50%
1.6
1.57
1.00
1.80
1.15
Propylene
C3H6
2.00%
2.00%
11.70%
1.5
0.00
0.95
0.00
0.95
Toluene
C7H8
1.20%
1.10%
7.00%
3.1
2.47
1.55
2.69
1.70
White spirit
Mixture
1.10%
1.10%
6.50%
> 2
5.00
3.15
5.00
3.15
Xylene
C8H10
1.00%
1.10%
7.60%
3.7
3.00
1.90
2.75
1.75
(1) List of main preprogrammed gases. Coefficients are given with respect to methane.
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