Fiber-reinforced polymer composite piping is known to provide excellent corrosion resistance and high specific properties such as strength-to-weight ratio. However, the propensity for micro-cracking of the polymer matrix and associated potential for fluid leakage, and/or insufficient capacity to endure damage from abrasive fluids transported in the piping, often requires composite piping to be equipped with internal polymeric liners. It has been shown that polyurethane liners provide good abrasion resistance and reliable fluid containment. A durable bond between polyurethane liner and structural composite pipe can be achieved employing suitable manufacturing protocols. This was demonstrated by earlier research for laboratory-scale pipe structures. In the present work, manufacturing procedures for large-scale piping structures are described along with the involved chemical and mechanical processes.

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