Abstract
Composite repair systems for pipe have been used successfully for leak sealing and reinforcement of pipework in the process industries. Their use has also expanded into pipeline integrity to address corrosion and mechanical damage, much like welded steel sleeves. Composite repairs are designed to reduce the strain in damaged areas of pipe to an allowable stress. Most composite repair systems have a modulus in the range of 2-12 Msi(14-83 GPa) which is about 15-2.5 times less than that of steel. The amount of reinforcement required to reduce the stresses in the steel substrate is a function of the wall loss of steel and the modulus of the composite repair system. A repair system should be a minimum of 2.5-15 times thicker than the amount of steel lost due to substrate damage. By utilizing a composite repair system whose modulus is higher than steel it is possible to design a repair thickness less than that of what was originally lost. In addition higher levels of strain reduction are possible with thinner repairs. In this paper FEA analysis, mechanical characterization and full scale testing on dents is conducted to characterize the performance of an Ultra High Modulus moisture cured composite repair system.