Types of CPP
Types of Concrete Pressure Pipe
The American Water Works Association (AWWA) defines four types of concrete pressure pipe:
Reinforced Concrete Pressure Pipe, Steel-Cylinder Type (AWWA C300)
First manufactured in 1919, C300 consists of a welded steel cylinder with steel joint rings at each end, a cage(s) of circumferential steel reinforcing bars/wire and a structural concrete wall.
Prestressed Concrete Pressure Pipe, Steel-Cylinder Type (AWWA C301)
There are two types of C301 pipe:
- Lined-Cylinder Pipe (LCP) – First used in North America in 1942, LCP consists of a welded steel cylinder with steel joint rings at each end, an internal concrete lining, high-tensile strength steel wire wrapped directly on the steel cylinder and an external coating of portland cement mortar.
- Embedded-Cylinder Pipe (ECP) – First installed in North America in 1953, ECP consists of a welded steel cylinder with steel joint rings at each end, embedded in a concrete core, high-tensile strength steel wire wrapped on the exterior concrete core surface and an external coating of portland cement mortar.
Reinforced Concrete Pressure Pipe, Noncylinder Type (AWWA C302)
First used in the early 1900’s, C302 consists of a cage(s) of circumferential and longitudinal steel reinforcing bars/wire and a structural concrete wall with steel or concrete joint rings at each end.
Concrete Pressure Pipe, Bar-Wrapped, Steel-Cylinder Type (AWWA C303)
First offered in the early 1940’s, C303 consists of a welded steel cylinder with steel joint rings at each end, an internal concrete or mortar lining, spiral-wrapped reinforcing bar around the outside of the steel cylinder and an external coating of portland cement mortar.