Industrial Preparation of High-Temperature Resistant Rubber Pipes for Trenchless Rehabilitation Technology

Abstract Trenchless lining rehabilitation technology offers an efficient, environmentally friendly, and sustainable solution for pipeline repairs, especially for drainage and oil transportation pipelines. However, thermal pipelines operating at temperatures exceeding 100°C require specialized heat-resistant materials. Traditional plastic materials, such as polyethylene (PE), cannot withstand such conditions for extended periods. This study developed a high-temperature-resistant rubber material suitable for 120–150°C operating conditions and fabricated rubber pipelines using industrial production processes. The rubber material is based on ethylene propylene diene monomer (EPDM) as the primary polymer, with the addition of industrial-grade deep eutectic solvents (DES) to enhance heat resistance and mechanical properties. Additionally, accelerated aging tests were conducted on the rubber pipelines at 150°C to evaluate their effects on the mechanical properties of the pipelines. The results demonstrated that the industrially produced rubber pipelines exhibited excellent mechanical performance and aging resistance, maintaining long-term stability under high-temperature conditions. This makes them a feasible and effective material for the trenchless rehabilitation of thermal pipelines.