Dongfeng Renault engine parts High pressure oil pipe assembly 1112106-E9300

Built to withstand the extreme pressure demands of Dongfeng Renault’s common rail fuel system (up to 2,000 bar), the pipe assembly features a multi-layer reinforced structure. The inner tube is made of seamless stainless steel (316L grade, 1.5mm wall thickness) that resists burst pressure up to 6,000 bar—three times the system’s operating pressure—ensuring safety even during pressure spikes. The outer layer is wrapped in high-strength aramid fiber braiding (2 layers) that enhances radial pressure resistance and prevents pipe expansion under load. Unlike single-layer pipes that deform or burst under high pressure, this reinforced design maintains structural integrity through 100,000+ engine cycles, ensuring consistent fuel delivery to injectors. Rigorous pressure testing confirms no leakage or deformation at maximum system pressure, meeting Dongfeng Renault’s strict fuel system standards

To prevent high-pressure fuel leaks (a critical safety hazard), the assembly integrates a dual-seal connector system. Each pipe end features a precision-machined conical seat (60° angle) that mates with the fuel rail/injector’s sealing surface, creating a metal-to-metal seal that resists pressure-induced separation. Additionally, each connector is fitted with a Viton O-ring (heat-resistant to 200°C) that provides a secondary seal against minor surface irregularities. The pipe also includes a flexible polyurethane sleeve (3mm thick) along its length that dampens engine vibration, reducing stress on pipe joints and preventing seal wear over time. Unlike rigid pipes that develop leaks from vibration fatigue, this design ensures leak-free operation for 80,000+ km, avoiding fuel waste and fire risks

Designed to endure the harsh environment of Dongfeng Renault’s engine bay (exposure to fuel, oil, coolant, and high temperatures), the pipe assembly uses corrosion-resistant materials. The inner stainless steel tube resists chemical degradation from diesel fuel additives (e.g., cetane improvers) and prevents rust from moisture contamination. The aramid fiber outer layer is coated with a heat-resistant epoxy resin that withstands temperatures up to 220°C—critical for pipes routed near exhaust manifolds or cylinder heads. The connector threads are plated with zinc-nickel alloy (8μm thickness) that passes 1,000 hours of salt spray testing without corrosion, ensuring easy disassembly during maintenance. Unlike carbon steel pipes that rust within 2–3 years, this material combination extends the assembly’s service life to 5+ years

The high-pressure oil pipe assembly complies with international safety standards for automotive fuel systems (ISO 4081, SAE J343) and Dongfeng Renault’s internal quality requirements. It undergoes 100% pressure testing (2,500 bar for 5 minutes) and helium leak detection (leak rate ≤ 1×10⁻⁹ mbar·L/s) before leaving the factory, ensuring zero defects. For installation, the pipe features pre-marked alignment indicators that match reference points on the engine, guiding technicians to position it correctly without guesswork. It uses OEM-specification torque values (35–40 N·m for fuel rail, 25–30 N·m for injectors) and is compatible with standard torque wrenches—no specialized tools required. Installation takes 30–45 minutes, reducing engine downtime for fleet operators. Backed by a 24-month warranty against manufacturing defects (e.g., pipe burst, seal failure, or corrosion), it provides Dongfeng Renault engine owners with reliable fuel delivery and long-term safety