Evaluation of Failure Factors of Fiber Reinforced Plastic Pipe Based on Analytic Hierarchy Process

The circumferential tensile strength loss rate of fiber reinforced plastic (FRP) pipe was calculated under joint action of multi factors including temperature, NaCl content, CO₂ partial pressure, H₂S partial pressure and stress by corrosion experiment simulating field application environments and tensile test along hoop. The weighting of circumferential tensile strength loss caused by each factor was calculated by analytic hierarchy process (AHP) on the basis of the obtained circumferential tensile strength loss rate. The evaluation results show that the strong-to-weak sequence for circumferential tensile strength loss rate of FRP pipe was temperature, stress, H₂S partial pressure, CO₂ partial pressure and NaCl content.