Home › Types of pipes Types of pipes Steel Pipe Large diameter steel pressure pipes for water and wastewater applications are typically made with carbon steel and installed as buried assets. Bar-Wrapped Pipe BWP is comprised of a welded steel cylinder that serves as a watertight membrane and works with steel reinforcing bars wrapped under tension around the cylinder to provide strength. Cast Iron Pipe Cast iron (grey cast iron) is a historical type of pipe manufactured in the 19th and 20th centuries as pressure pipe for transmission of water and sewage. Ductile Iron Pipe Introduced into the U.S. marketplace in 1955, ductile iron pipe (DIP) is pressure pipe commonly used for potable water and sewage distribution. Prestressed concrete cylinder pipe (PCCP) Prestressed Concrete Cylinder Pipe (PCCP) consists of a concrete core, a thin steel cylinder, high tensile prestressing wires and a mortar coating.