These specifications generally define physical properties and characteristics of liquefied petroleum gases (LP-gases) which make them suitable for private, commercial and industrial applications. These specifications do not purport to specifically define all possible requirements to meet all possible applications. Therefore, the user is cautioned to exercise judgment in formulating final specifications for specific applications. There are many uses for LP-gases including refining, petrochemical and heating. The six LP-gas specifications represented by this standard include Fractionation Grade: ethane ethane/propane mix propane iso-butane normal butane and natural gasoline The majority of industry specifications were surveyed to find the common characteristics in establishing these specifications.