Flammable Liquid

Flammable liquid is defined that the liquid easy to be fired. But the easiest of each liquid or gasses have scale, on the chemical engineer this material is being classes as in the table below. As on the table describe of boiling point, flash point and ignition temperature of each material. Boiling point is the temperature which the material beginning to boil like water will boil at 100 oC at 1 atmosphere pressure. Flash point is the lowest temperature at which material will ignite, but flash point is not autoignite, at which material will fired by itself.

Flammable liquid is grouping into their gas group, the group of flammable liquid is just use for using an equipment that is suitable for this environment. Some equipment is not suitable with this liquid properties and can make broken to certain equipment if forced using on this environment. Ignition temperature is the point that material will starting fired when put in heat source into the material.

Group specification and characteristics of some common flammable liquids, gases, and vapor are listed in the table below:

Material	Boiling Point ^oC	Flash Point ^oC	Ignition Temp. ^oC
Acetone	56	-20	465
Acetylene	-83	Gas	305
Ammonia	-33	Gas	651
Benzene	80	12	498
Butane	-1	Gas	287
Carbon Monoxide	-192	Gas	609
Ethane	-89	Gas	472
Ethyl Monoxide	78	55	363
Ethylene	-104	Gas	450
Heptane	98	-4	204
Hydrogen	-252	Gas	500
Hydrogen Cyanide	26	-18	538
Methane	-162	Gas	537
Propane	-42	Gas	432
Toluene	111	4	480

The data given in that table is derived from NFPA 325M. Flash point is the lowest temperature at which a material give off sufficient vapor to form an explosive gas/air mixture in the air immediately above the surface.

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