Oldham BM25, User Manual

Page: 49 / 80

5
– Maintenance
49
Gas Molecular
formula LEL
1
LSE
2
Vapor
density Coef. /
CH
4
.
Recom-
mended
calgas Abbreviation
(French)
Ethyl acetate C
4
H
8
O
2
2.1 % 11.5 % 3.0 1.35 But/Prop AET
Acetone C
3
H
6
O 2.15 % 13 % 2.1 1.55 But/Prop ACO
Acetylene C
2
H
2
1.5 % 100 % 0.9 1.1 But/Prop ACY
Butadiene C
4
H
6
1.4 % 16.3 % 1.85 1.25 But/Prop BUD
Butane C
4
H
10
1.5 % 8.5 % 2.0 1.6 But/Prop BUT
Butanone C
4
H
8
O 1.8 % 11.5 % 2.5 1.75 But/Prop BUN
Dimethylether C
2
H
6
O 3.0 % 27.0 % 1.6 1.55 But/Prop DIM
Unleaded petrol Mixture 1.1 %

6 % 3 to 4 3.0 But/Prop ESS
Ethanol C
2
H
6
O 3.3 % 19.0 % 1.6 1.15 But/Prop ETA
Ethylene C
2
H
4
2.7 % 34.0 % 0.98 1.0 But/Prop ETY
G.P.L. Prop+But 1.65 %

9.0 % 1.85 2.05 But/Prop GPL
Diesel Mixture 0.6 %

6.0 % > 4 5.00 But/Prop GSL
Natural gas CH4 5.0 % 15.0 % 0.55 1.05 CH4 GNT
Hexane C6H14 1.2 % 7.4 % 3.0 2.36 But/Prop HEX
Hydrogen H2 4.0 % 75.6 % 0.069 0.80 But/Prop H2
Isobutane C4H10 1.5 %

15 %
2.0 1.6 But/Prop ISB
Isopropanol C3H8O 2.15 % 13.5 % 2.1 1.6 But/Prop ISP
Methane
3
CH4
5.0 %
15.0% 0.55
1.00
CH4 CH4
4.4 % 1.14
Methanol CH3OH 5.5 % 44.0 % 1.1 1.0 But/Prop MTL
Methylamine CH3NH2 4.9 % 20.7 % 1.1 2.0 CH4 MAM
Propylene oxide C
3
H
6
O 2.3 % 37.0 % 2.0 2.0 But/Prop OPR
Ethylene oxide C
2
H
4
O 2.6 % 100 % 1.5 2.1 But/Prop ETO
Pentane C
5
H
12
1.4 % 8.0 % 2.5 1.70 But/Prop PNT
Propane C
3
H
8
2.0 % 9.5 % 1.6 1.3 But/Prop PRO
Propylene C
3
H
6
2.0 % 11.7 % 1.5 1.2 But/Prop PRY
Toluene C
7
H
8
1.2 % 7.0 % 3.1 2.05 But/Prop TOL
White spirit Mixture 1.1 % 6.5 % > 2 5.0 But/Prop WSP
Xylene C
8
H
10
1.0 % 7.6 % 3.7 2.5 But/Prop XYL
List of pre-programmed combustible gases with coefficients
(1) Lower flammable limit.
(2) Upper flammable limit.
(3) The LEL adopted value for methane varies by country. The monitor integrates two different LEL values for
CH4 (4.4% vol. and 5.0% vol.)