CFRP Liners for Large-Diameter Water/Wastewater Pipe

Carbon fiber-reinforced polymer (CFRP) is a structural lining system for repair and renewal of large diameter (30 to 210 in [0.76 to 5.33 m]) pressure pipes in water and wastewater systems. Between 2009 and 2018, the American Water Works Association (AWWA) developed AWWA Standard C305, “CFRP Renewal and Strengthening of Prestressed Concrete Cylinder Pipe (PCCP).” CFRP’s success with PCCP has led to widespread application on other pipe materials, including steel, iron, and reinforced concrete pipe materials. This article summarizes 25 years of experience, practices, and factors influencing longterm performance. CFRP performance is compared with other structural rehabilitation methods.