Concrete pipe cannot compare to Ductile Iron when considering their respective approaches to internal pressure design; and Ductile Iron pipe is much easier to install and operate than concrete pipe. Follow the links below find out the many ways in which Ductile Iron pipe is superior to concrete pipe:

Ductile Iron Pipe versus BCCP Pipe
Hydraulic Analysis of Ductile Iron Pipe
A Comparison of Engineering Considerations for Pressure Pipe
DIPRA Seminars / Lectures

Take A Look At These Links To Find Out More

Why Ductile Iron Pipe is Superior to PVC Pipe
Why Ductile Iron Pipe is Superior to Polyethylene Pipe
Why Ductile Iron Pipe is Superior to Steel Pipe