Dongfeng VL truck spare parts Connecting pipe assembly 8101035-C4301

Built to withstand the rigorous pressure demands of Dongfeng VL’s operating systems, this assembly features a seamless 304 stainless steel pipe core with a tensile strength of 580MPa and yield strength of ≥210MPa. It supports continuous operating pressures of up to 2.5MPa and peak pressures of 4MPa, making it suitable for both high-pressure cooling circuits and hydraulic auxiliary systems. The pipe’s wall thickness (4mm) is uniformly controlled via cold-drawing technology, preventing pressure-induced deformation or bursting. A smooth inner surface (Ra ≤0.4μm) minimizes fluid flow resistance by 30% compared to carbon steel pipes, ensuring efficient transmission of coolant or hydraulic oil without pressure loss—critical for maintaining engine temperature or hydraulic component performance

Leakage prevention is a core design focus, with the assembly integrating precision-machined connection interfaces and dual-seal technology. The M22×1.5 threaded ends undergo rolling tapping to achieve a 6H thread precision grade, forming a tight fit with mating components. Each connection is equipped with a conical copper seal washer (hardness HRC25-30) that deforms slightly under torque (55-60N·m), creating a metal-to-metal seal. A secondary nitrile rubber O-ring (Shore hardness 70±5) provides backup protection against leakage. Welding joints (for pre-formed bends) use TIG welding with full penetration, ensuring no internal pores or cracks—leakage rate is ≤0.01L/min at 2.5MPa, far below the industry limit of 0.1L/min

Designed to endure the harsh conditions of heavy-duty operations—including road salt, engine oil, coolant, and dust—the assembly exhibits exceptional corrosion and wear resistance. The 304 stainless steel pipe core is inert to most automotive fluids, resisting rust and chemical degradation. The external surface undergoes passivation and electrophoretic coating (80μm thickness), forming a protective layer that passes 2000-hour neutral salt spray testing (ASTM B117) with no red rust. A 3mm-thick EPDM rubber sleeve wraps the pipe, absorbing vibration and preventing abrasion from contact with metal chassis components. The assembly operates stably in temperatures ranging from -40℃ to 150℃, adapting to frigid winters and high-temperature engine compartments

The connecting pipe assembly is engineered for efficient installation and long-term cost savings, ideal for fleet operations. Its pre-formed bends eliminate on-site bending, ensuring precise alignment with the truck’s mounting points. Pre-installed nylon mounting clips fit the original chassis brackets, securing the pipe and preventing vibration-induced movement. Installation requires only a torque wrench and standard hand tools, with two technicians completing the process in 45 minutes—50% faster than non-OE pipes that require custom fitting. The assembly’s durable construction extends service life to ≥250,000km, reducing replacement frequency and fluid loss-related maintenance costs by 40%. Backed by a 1-year/100,000km warranty, it provides reliable performance for heavy-duty logistics and construction applications