Environmental Engineering Reference
In-Depth Information
4
ChaPTer
WasTeWaTer
ConveyanCe
The design considerations for the piping system are the function of the
specifics of the system. However, all piping systems have a few common
issues: The pipe strength must be able to resist internal pressure, han-
dling, and earth and traffic loads; the pipe characteristics must enable the
pipe to withstand corrosion and abrasion and expansion and contraction
of the pipeline (if the line is exposed to atmospheric conditions); engineers
must select the appropriate pipe support, bedding, and backfill conditions;
the design must account for the potential for pipe failure at the connec-
tion point to the basins due to subsidence of a massive structure; and the
composition of the pipe must not give rise to any adverse effects on the
health of consumers.
Kawamura (1999)
4.1 inTroduCTion
Wastewater conveyance or piping systems resemble veins, arter-
ies, and capillaries. According to Nayyar (2000), “They convey waste
from residential and commercial buildings and other civic facilities to
the treatment facility or the point of discharge.” Wastewater operators
must be familiar with piping, piping systems, and the many components
that make piping systems function. Operators are directly concerned
with various forms of piping, tubing, hose, and the fittings that con-
nect these components to create workable systems. This chapter cov-
ers important, practical information about the piping systems that are
a vital part of plant operation and essential to the success of the total
activity. To prevent major system trouble, skilled operators are called
upon to perform the important function of preventive maintenance to
