ALTERNATE POL FACILITIES
INTRODUCTION. This section provides guidance for
design of alternate POL facilities. The alternate fuels
discussed are: LPG, CNG, hydrazine, and OTTO fuel. This
section contains information on products which are unique.
Therefore, some special considerations are discussed, in
addition to information provided in Section 2, General Design
Information, which contains important information on fueling
facilities. Do not start the design of any fueling system
without first becoming completely familiar with Section 2 of
LIQUEFIED PETROLEUM GAS (LPG)
Uses. The uses for which LPG fuel is procured and
the methods of transportation of the fuel are as follows:
a) LPG fuel is used for general heating, metal
cutting and brazing, and in laboratories. LPG is procured in
cylinders or for bulk storage by tank car or tank truck.
Cylinders usually contain 100 pounds (45 kg) of gas, in a
and rescue training facilities.
c) Where economically justified, LPG facilities
supplement utility-supplied gas systems for meeting peak loads
and as a standby where interruption to a supply is possible.
(1) Standby LPG facilities serving large
equipment, such as boilers of 200,000 British thermal
(Btu's) per hour (58 000 W) and above, may consist of
separate gas system to an alternate set of burners on
(2) For a gas system serving multiple small
appliances, provide the standby equipment with means for air
mixing to dilute the LPG with the proper amount of air to
match combustion characteristics of either natural or
manufactured gas serving the system in place of the utility-
supplied gas, or in conjunction with it to reduce utility peak