These specifications generally define physical properties and
characteristics of liquefied petroleum gases (LP-Gas) which make
them suitable for private, commercial, or 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 judgement in formulating final
specifications for specific applications.
The Gas Processors Association, its management, and supporting
companies claim no specific knowledge of how manufacturers and
users will produce, handle, store, transfer or consume the products
defined herein and therefore, are not responsible for any claims,
causes of action, liabilities, losses or expenses resulting from
injury or death of persons and/or damage to property arising
directly or indirectly from the use of LP-Gas or these
specifications relating to LP-Gas.
LP-gases are composed of hydrocarbon compounds, predominately
propane and butane, produced during the processing of natural gas
and also in the conventional processing of crude oil. The
composition of LP-gases may vary depending on the source and the
ratios of propane and butane content. They exist as gases at
atmospheric pressure and ambient temperatures, but are readily
liquefied under moderate pressures for transportation and
There are many uses for LP-gases, the major ones being as (1)
petrochemical, synthetic rubber, and motor gasoline feedstocks, and
as (2) commercial, domestic and industrial fuel. The following may
be accepted as a general guide for the common uses for the four
fuel types covered by these specifications:
Commercial Propane is the preferred fuel type
for domestic, commercial and industrial fuels. It is also a
suitable fuel for low severity internal combustion engines.
Commercial Butane is used principally as
feedstock for petrochemicals, synthetic rubber, and as blending
stocks or feedstocks in the manufacture of motor gasolines. Its use
as a fuel is generally limited to industrial applications where
vaporization problems are not encountered; however, small
quantities are used as domestic fuel.
Commercial Butane-Propane Mixtures cover a
broad range of mixtures, which permits the tailoring of fuels or
feedstocks to specific needs.
Propane HD-5 is less variable in composition
and combustion characteristics than other products covered by these
specifications. It is also suitable as a fuel for internal
combustion engines operating at moderate to high engine
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