Provide the transfer point from trucks or
tank cars with a substantial concrete bulkhead. Anchor the
piping in the bulkhead. Do not use pipe sleeves. Provide
with the bulkhead hose or swivel-type piping connections. The
bulkhead provides a breakaway point if the truck or tank car
moves away without first disconnecting the hoses. Also
provide emergency shut-off and excess flow valves. Refer to
NFPA 58 and MIL-HDBK-1027/1 for additional information.
Use the following flow rates:
a) Provide flow rates commensurate with the storage
capacity and the size of pumps, compressors, and loading
b) Provide flow rates that allow operators adequate
time to shut down facilities before tanks or trucks are filled
beyond maximum allowable. Limit flow rates from tanks by
setting excess flow valves.
c) Provide off-loading lines with manually operated
throttle valves so operators can adjust flow rates to points
below shut-off settings of excess flow valves.
10.2.4.1 Types of Storage. Types of storage facilities
include cylinders or bulk storage tanks.
a) Provide cylinders or containers conforming with
ASME and/or DOT criteria as described in guide specifications.
Used tanks are not allowed. The number of cylinders at a
facility depends on the maximum required flow rate and the
vaporization rate per cylinder at the minimum operating
b) Provide bulk storage tanks as follows:
(1) For storage tanks up to 30,000 gallons
(114 000 L) capacity, use horizontal steel tanks.
(2) For storage tanks above 30,000 gallons
(114 000 L) capacity, use spherical or spheroidal steel tanks.
Do not use underground tanks for LPG.