The consumption graphs are valuable for showing present and projected stockage.
They show trends in
consumption, sudden increases, and decreases.
a. The graph must show total barrels of a product at the storage point. The total barrels plotted on the graph
must be adjusted for tankage taken out of or placed into service. (for example, tank cleaning).
b. Allowance for vapor space is calculated at 5 percent of the total available storage capacity. When a tank
is taken out of service, you can not count that storage capability; (for example, the total storage for "X" product at
"Y" location is: 70 Mbbl (70,000 bbl (7 each 10,000 bbl storage tanks)) the 95 percent fill capacity is: 66.5 Mbbl
(66,500 bbl), to allow for the 5 percent vapor space).
EXAMPLE: To solve for the vapor space, you must multiply vapor space by the number of Mike barrels. Vapor
space = 5 percent, which is equal to = .05. The vapor space for 80 Mbbl = 80 x .05 = 4 Mbbl
c. The graph is plotted covering a monthly period. Issues are shown starting at 0001 of one day to 0001 of
the next day by a diagonal line. Receipts are plotted at the end of the day by a vertical line from the issue line.
d. The plotting of projected issues and receipts for the complete monthly period are shown by a dotted line.
The actual issues and receipts are plotted with a solid line. (Note: By plotting the graph with the anticipated and
the actual issues and receipts, the dispatcher can see what adjustments need to be made.)
e. The safety level is shown at the bottom of the graph. The safety level, number of DOS, is established at
the theater command level. The safety level is based on the previous month's total daily issues, divided by the
number of days during the issue period, and then multiplied by the DOS required by the theater.
EXAMPLE: 150 Mbbl of fuel were used during last month's field training exercise. That month consisted of 30
days. The safety level is 4 DOS.
150 Mbbl / 30 = 5 Mbbl
5 Mbbl x 4 = 20 Mbbl, the safety level is 20 Mbbl
12. Monthly Pipeline Schedule:
The monthly pipeline schedule shows programmed movements through the pipeline of products and the
quantities required during the 30-day period. The schedule will show where the product is and what products are
in the pipeline as well as the time to determine how long it will take the product to reach its destination. The
monthly schedule is merely a graph which shows line capacity in barrels (distance) plotted against time (hours).
The pipeline is depicted by a graph.
a. The number of hours that the pipeline is to be used each day must be determined. A pipeline could
operate for up to a maximum of 24 hours per day.
NOTE: For the examples, will use a 20 - hour time period stating at 0001 and ending at 2000 which will allow for
4 hours of maintenance to the military pipeline system.