Quantcast Physical Properties of LPG

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oil's pour
point temperature, the fuel oil has reached a gel-
like state
and would be difficult to pump.  In nearly all
cases, No.
6 fuel oil requires heating to be pumped.  In some
cases, No.
4 and No. 5 burner fuel oils will require heating.
Liquefied Petroleum Gas (LPG)
Physical Properties of LPG.  LPG is composed
predominantly of propane and propylene with minor amounts of
butane, isobutane, and butylene.  It is odorless, colorless,
and non-toxic.  To reduce the danger of an explosion from
undetected leaks, commercial LPG usually contains an odorizing
agent which gives it a distinctive pungent odor.  LPG is a
vapor at atmospheric conditions.  It is normally stored as a
liquid at a storage pressure of 200 psia (1400 kPa).  LPG has
the following properties:
a) Freezing Point, degrees F (degrees C) -305 (-187)
b) Relative Density (Specific Gravity) 147 degrees
API (0.588)
c) Vapor Pressure at 100 degrees F (38 degrees C),
175.8 (1212) psi (kPa)
d) Heat Content, Btu/lb (kJ/kg)
21,591 (50 221)
Special Precautions for LPG
a) Store LPG under pressure in appropriate pressure-
rated tanks.
b) The potential for fire and explosion presents
extreme hazards to life and property.  Provide adequate relief
venting and additional fire protection in accordance with NFPA
c) Provide tank spacing in accordance with the
requirements of Section 10 of this handbook.
Compressed Natural Gas (CNG)
Physical Properties of CNG.  Appendix A to NFPA 52,
Compressed Natural Gas (CNG) Vehicular Fuel Systems, defines
certain CNG properties.
Natural gas is a flammable gas.  It


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