EXAMPLE: Pumping 10 Mbbl of product prior to stripping requires 5 hours for the batch to pass a given point.
The same batch during stripping has its flow rate reduced by approximately half (flow rate is now 1 Mbbl not 2
Mbbl) which lengthens the time to 10 hours in this case.
13. Graphic Progress Chart
The graphic progress (Figure 1-4) chart shows the position of batches and their progress through the pipeline.
The chart is prepared one day in advance for what is to be in the pipeline at the beginning of the new pumping day
and what is scheduled to be pumped into the pipeline on the new day. The chart is constructed primarily the same
way that the monthly schedule is with the exception that it covers a 24-hour period.
a. The linefill terminal and pump stations are shown on the horizontal axis (across the top). The linefill is
shown to the right of the midpoint (midpoint is located at base terminal).
b. The scheduled input is shown to the left of midpoint beginning at the point for input at the base terminal
and from other locations at the scheduled input time, shown to the left of the input location.
c. All product batch inputs are represented by dotted lines. The dotted lines represent the point where the
product crosses the stating location. Once the batch crosses this location, it is represented by a solid line.