Composite repair system design requirements

In order to use composites for the repair of damaged pipelines, it is crucially important that they be designed based on a valid code to ensure that sufficient reinforcement has been provided. ASME PCC-2 and ISO/TS 24817 provide required parameters to design a repair system with sufficient stiffness, strength and thickness. The design revolves around the determination of a minimum thickness for the FRP wrap that reinstates the design pressure in the pipe in the presence of other probable loads. 

After preparing of the pipe surface and applying the putty, the composite laminate is applied circumferentially along the cleaned area from one side to another side. The number of required layers is determined by designer based on a proper design method. All of the design methods are explained in previous sections. The typical section of a pipe repaired by overwrap system is shown in Figure 10.2. 

---