1. Terms. Here are some of the terms and definitions you will encounter in this lesson.
a. Pipeline -- Is a multi-product pipeline this means that more then one type or grade of product can be
pumped through a single pipe.
b. Forecast -- A pipeline plan or schedule of products to be pumped.
c. Schedule -- A monthly, weekly, or daily plan of deliveries into and out of a pipeline at some point
connected with the pipeline.
d. Dispatching -- The act of controlling the pipeline operation IAW a forecast/schedule.
e. Dispatcher -- A person responsible for scheduling the movement of product through the pipeline.
f. Chief Dispatcher -- The person in charge who controls all operations for the scheduling and movement of
products in the pipeline. The chief dispatcher is usually located at the petroleum pipeline and terminal operating
battalion or petroleum group headquarters.
g. District Dispatcher -- Controls the pipeline operations in his district IAW instructions from the chief
dispatcher office. The district dispatcher is located at the petroleum pipeline and terminal operating company.
h. Shift Dispatcher -- Is responsible for control of the pipeline in the name of the dispatcher (for example,
chief or district), depending on the office assigned to during a working shift.
i. Batch -- A specific quantity and type of product pumped into a pipeline.
j. Batching -- The sequence in which two or more products are to be pumped and introducing those
products into the pipeline in a sequence that results in the least formation of interface material.
k. Interface -- The mixing or commingling between adjacent products in a multiproduct pipeline.
Cut -- Product withdrawn from a pipeline and routed into tankage.
m. Stripping (Split Streaming) -- The process of drawing off a part of the total product batch into an
intermediate terminal tanks.
2. Chief Dispatcher Functions.
Now that you have become familiar with the terms related to batching and scheduling. We will now list the
responsibilities and coordination of the chief dispatcher.
a. The chief dispatcher is responsible for knowing the following:
(1) Capacity of storage tanks at each storage location connected to the pipeline.
(2) Linefill of the pipeline and the throughput for each section of the pipeline.