Page 243 - Fluid mechanics, heat transfer, and mass transfer

TWO-PHASE FLOW 221

shutdown and in which pipe wall abrasion is & Abrasion may be considered as the rubbing together
minimized. of the solids in the slurry and the pipe. This needs to
& Brute force systems, on the other hand, may require be considered in the design of brute force pipelines
operating velocities as high as 5.5–6 m/s. such as dredging lines. In these systems, pipe wear is
a major consideration. These lines may utilize dif-
. “It is a good practice to give gentle slope to horizontal
slurry lines, wherever possible.” True/False? ferent linings or different types of pipes such as
hardened steel, concrete, and so on.
& True. Giving a slope of about 12.5 mm for every 3 m
& Conventional slurry systems are designed to operate
pipe run is a good practice.
at velocities low enough that abrasion is minimal and
. What are the considerations involved in the design of
pipeline wall can be designed for long-term opera-
slurry pipelines with respect to pipeline wear due to
tion. These systems use standard steel pipe, the same
abrasion?
as that used for oil and gas pipelines.