with a concrete saw, ensure the pipe is on a solid base
when cutting to avoid binding the saw. Also, use plenty
of water to keep the blade cool. Never attempt to cut
concrete pipe without proper personal safety
equipment. Smaller sizes without reinforcement can
be scored with a chisel, or snap cut like vitrified clay
pipe. On larger sizes of pipe, 10 inches and above,
cutting of the pipe is not practicable. Larger pipe is
used in applications where cutting is not required.
JOINING.Eight different types of joints for
concrete pipe are available. The most common joint is
the slip joint. This kind of concrete pipe joint is
similar to the cement-asbestos pipe connection, except
a coupling is not used. There is a groove on the spigot
end where a rubber gasket ring is placed. This gasket is
compressed into the groove by the bell of the
connecting pipe as they are pushed together, forming a
watertight seal. On pipe 10 inches in diameter and
greater, cement mortar is placed in the spaces between
the ends of the pipe on the outside; also inside, if the
pipe diameter is large enough for access.
PVC-Class Water Pipe
PVC-class water pipe is used for construction
projects around the world. It is lightweight compared
to iron pipe, and it can also be cut easily and beveled
with cement-asbestos tools. Most importantly, PVC-
class water pipe can be joined together easily.
When installing this type of pipe, ensure the bell
end, the plain end, and the gasket are free of dirt and
debris. Usually, the company supplying the pipe also
supplies a lubricant to facilitate the sliding of pipes
together. When backfilling, ensure there are no rocks
or other hard debris in the backfill material, as they
could, over a period of time, puncture the pipe.
One of the best reasons for using PVC pipe in a
water main is the ease with which it can be tapped. A
variety of adapters and valves are also readily
available in the naval supply system.
Q20. For water service applications, cast-iron soil
pipe comes in what lengths?
Q21. Water pipes should be layed a minimum of how
many feet above and away from sewer lines?
Q22. In water service, what type of copperpipe should
be used for aboveground general applications?
Q23. What type of copper pipe comes in only 20-foot
Q24. There is a total of how many different methods of
Q25. What is the end-to-center method of measuring
Q26. It is important to clean all the flux from a
soldered copper pipe joint for which of the
Q27. Black iron pipe should be used for what type of
Q28. Because of the strength of ductile iron, you only
have to remove rocks and boulders of what size
from backfill material?
Q29. Joining of concrete pipe is similar to joining of
what other type of pipe?