a. Figures 6 and 7 shows the operating characteristics of pipeline pump

station facilities.

From these graphs, any one of three factors--the

pumping unit operating speeds, the volume of fuel throughput and the

operating head--may be estimated provided the other two factors are known.

For example, determine the operating speed required for three--pump

operation of a station on 6-inch pipeline to deliver 785 BPH (550 GPM)

against a head loss to the next station of 1,395 feet.

(1) Enter the boom chart in Figure 6 at 550 GPM. Follow the vertical

line at this point to about midway between the curves labeled "1,300 FTH"

and "1,500 FTH."

(2) Follow the intersecting horizontal line to the left side of the

chart and read 1,800 RPM.

Therefore, the three-pump operation calls for

speed for each pump of 1,800 RPM. Similarly, assume that a single 6-inch

booster pump is to be used to pump fuel from a marine terminal to a tank

farm. Data includes that the pump must overcome 300 FTH loss between the

dockside and tank farm.

c. See Figure 7.

Assume that a single 6-inch booster pump is to be

used to pump fuel from a marine terminal to a tank farm. Data includes that

pump must overcome 300 FTH loss between the dockside and the tank farm.

Determine the volume of fuel delivered by the pump at 1,800 RPM, assuming

the pump stages are connected in series (single discharge). Find the point

at which the 1,800-RPM line intersects the curve labeled "300 FTH." This

point coincides approximately with the line representing 1,000 GPM.

Therefore, the pump throughput is about 1,000 GPM or about 1,429 BPH.

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