Page 115 - Electrical Installation in Hazardous Area

Table 4.1 Data for flammable materials for use with electrical equipment (from BS 5345, Part I (1989))

1 2 3 4 5 6 7 8 9 10 11 12 13 14
Flammable Formula Melting Boiling Relative Flash Flammable limits Ignition Minimum T class of Apparatus
material point point vapour point temperature igniting suitable group
density current apparatus
LFL UFL LFL UFL

"C "C "C Vol.% Vol.% mg/L mg/L "C mA
acetaldehyde -123 20 1.52 -38 4 57 73 1040 140 - T4 IIA
acetic acid 17 118 2.07 40 5.4 16 100 430 485 - T1 IIA
acetic anhydride -73 140 3.52 54 2.7 10 - - (334) - (E) IIA
acetone -95 56 2.0 -19 2.15 13 60 310 535 - T1 IIA
acetonitrile -45 82 1.42 5 - 4.4 16 - 523 - T1 IIA
acetyl chloride -112 51 2.7 4 5.0 - 390 - T 2 IIA
acetylene -81 -&Q* 0.9 - 1.5 100 305 24 T2 IIC
(see clause 37)
acrylonitrile -82 77 1.83 -5 3 17 65 480 - T1 IIA
allyl alcohol - - - 21 - - - - - t IIA
allyl chloride -135 45 2.64 -20 3.2 11.2 105 485 - T I IIA
allylene -103 -23 1.38 1.7 - 28 - - T w
ammonia -78 -33 0.59 15 28 105 630 - T1 IIA
amphetamine - 200 4.67 < 100 - - - - t IIA
aniline -6 184 3.22 75 1.2 8.3 617 - TI (W)
benzaldehyde -26 179 3.66 65 1.4 - 60 - 190 - T4 (W
benzene -6 80 2.7 -11 1.2 8 39 270 560 - T1 IIA
blast hance gas 28.0 70.0 - - t IIA
blue water gas - - - - - - - - T1 IIC
I-bromobutane -112 102 4.72 121 2.5 - 230 - 265 - T3 IIA
bromoethane -119 38 3.75 < -20 6.7 11.3 300 510 510 - T1 IIA
buta-l,%diene -109 -4 1.87 - 2.1 12.5 25 290 430 65 T2 IIA
butane -138 -1 2.05 -60 1.5 8.5 37 210 365 80T2 IIA
butanone -86 80 2.48 -1 1.8 11.5 50 350 505 - T1 IIA
(ethyl methyl
ketone)