Cylinder Pipe is designed and manufactured in accordance with AWWA Standard C303 and is normally supplied in standard diameters of 300 through 1500 mm and in laying lengths of 10 and 12.5 m for operating pressures up to 4000
kPa (variable as per diameter). Larger diameters, shorter lengths and designs for greater operating pressures can be
CCP is designed to resist internal hydrostatic pressure by both the steel
cylinder and helically wound rod. Thus, the pipe can be custom designed to
provide the exact amount of steel needed for pipeline operating
conditions by selecting the optimum combination of steel cylinder
thickness and rod diameter and spacing. This flexibility in design can
result in substantial cost savings over the use of standard pipe classes.
The structural integrity of CCP is greatly enhanced by the helically wound steel
rod which interlocks the steel elements of the pipe and the cement-mortar lining
and coating. This composite construction greatly increases the pipe's rigidity,
beam strength and resistance to impact and vacuum.
The self-centering steel bell and spigot joint sealed with a confined rubber
ring and the long laying length permit CCP to be installed rapidly and
economically. Laying rates of 30 to 50 pipe sections per day per crew are readily
attained. The reliability of this joint sealed with a round rubber ring has been
proved by 50 years of trouble-free performance.
Ameron provides a complete engineering package for each CCP project, including
pipe design data and fabrication details for each component. As part of a
custom-designed system, each special component is numbered to identify its
position in the pipeline. If required, layout drawings are prepared.
Fittings ca be furnished in virtually any size or configuration and are
manufactured in-plant to eliminate cutting and fit-up in the field.
Most CCP fittings are fabricated from standard pipe sections; many are
incorporated directly into the pipe, reducing the number of joints required, and
thus speeding installation.
Long-radius curves and minor changes in pipeline direction are achieved by joint
deflection of standard pipe or by the use of pipe sections with ends beveled up
to 5 degrees. For shorter-radius curves,
fabricated elbows are provided.
Restraint of Thrust
Hydraulic thrust in the pipeline can be resisted by field welding the joint
rings of assembled pipe sections on each side of the thrust point to develop the
require longitudinal restraint, thus eliminating the need for expensive and
sometimes unreliable concrete thrust blocks.
The smooth surface of the cement-mortar lining provides a Hazen-Williams
coefficient, C, of 145 for water service. Because cement mortar does not
corrode, the carrying capacity is not decreased with age.
The cement-mortar encasement maintains the steel elements in a highly alkaline
environment (pH of 12.5 or greater) in which galvanic corrosion is permanently
As a supplemental protection all pipe and fittings are coated with coal-tar
CCP can be easily tapped,
permitting the installation of a full range of outlets
in any diameter pipe. When equipment is commercially available, pressure taps
can be made without interrupting service.